From 2eb5a432d2229788ce2fdb09f36c6f4bebdea813 Mon Sep 17 00:00:00 2001
From: Laria Carolin Chabowski <laria@laria.me>
Date: Fri, 7 Feb 2020 09:44:59 +0100
Subject: Initial commit

---
 .gitignore                               |    1 +
 assets/interactive.js                    |  293 +++++
 assets/styles.css                        |  232 ++++
 composer.json                            |   27 +
 composer.lock                            | 1877 ++++++++++++++++++++++++++++++
 config.php                               |    6 +
 index.php                                |   25 +
 src/BoundVal.php                         |   36 +
 src/DBError.php                          |   31 +
 src/DbQuery.php                          |  197 ++++
 src/Entrypoint.php                       |   10 +
 src/Env.php                              |   80 ++
 src/Esc.php                              |   21 +
 src/Handler.php                          |   10 +
 src/Handlers/ApiTagsHandler.php          |   16 +
 src/Handlers/Index.php                   |   20 +
 src/Handlers/JsonAPIHandler.php          |   18 +
 src/Handlers/JsonAPIResult.php           |   24 +
 src/Handlers/MethodNotAllowedHandler.php |   14 +
 src/Handlers/NewNote.php                 |   40 +
 src/Handlers/NotFoundHandler.php         |   15 +
 src/Handlers/NoteHandler.php             |   39 +
 src/Handlers/Search.php                  |   33 +
 src/Log.php                              |   27 +
 src/Main.php                             |   58 +
 src/Models/Note.php                      |  250 ++++
 src/Models/Tag.php                       |   37 +
 src/Schema.php                           |   80 ++
 src/Search/AbstractFTSExpr.php           |   31 +
 src/Search/CharSource.php                |   33 +
 src/Search/FTSExpr.php                   |   30 +
 src/Search/FTSLogicOp.php                |   46 +
 src/Search/FTSNotExpr.php                |   29 +
 src/Search/LogicOp.php                   |   78 ++
 src/Search/NotOp.php                     |   32 +
 src/Search/Pagination.php                |   14 +
 src/Search/ParseError.php                |    9 +
 src/Search/Parser.php                    |  295 +++++
 src/Search/SQLSearchExpr.php             |   11 +
 src/Search/SearchExpr.php                |   14 +
 src/Search/SearchResult.php              |  160 +++
 src/Search/TagExpr.php                   |   42 +
 src/Search/TrueExpr.php                  |   25 +
 src/Tools/PopulateDevDb.php              |   71 ++
 templates/index.twig                     |   13 +
 templates/macros.twig                    |   50 +
 templates/new_note.twig                  |    5 +
 templates/note.twig                      |   15 +
 templates/search.twig                    |   23 +
 templates/skeleton.twig                  |   35 +
 tests/Search/ParserTest.php              |  120 ++
 51 files changed, 4698 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 assets/interactive.js
 create mode 100644 assets/styles.css
 create mode 100644 composer.json
 create mode 100644 composer.lock
 create mode 100644 config.php
 create mode 100644 index.php
 create mode 100644 src/BoundVal.php
 create mode 100644 src/DBError.php
 create mode 100644 src/DbQuery.php
 create mode 100644 src/Entrypoint.php
 create mode 100644 src/Env.php
 create mode 100644 src/Esc.php
 create mode 100644 src/Handler.php
 create mode 100644 src/Handlers/ApiTagsHandler.php
 create mode 100644 src/Handlers/Index.php
 create mode 100644 src/Handlers/JsonAPIHandler.php
 create mode 100644 src/Handlers/JsonAPIResult.php
 create mode 100644 src/Handlers/MethodNotAllowedHandler.php
 create mode 100644 src/Handlers/NewNote.php
 create mode 100644 src/Handlers/NotFoundHandler.php
 create mode 100644 src/Handlers/NoteHandler.php
 create mode 100644 src/Handlers/Search.php
 create mode 100644 src/Log.php
 create mode 100644 src/Main.php
 create mode 100644 src/Models/Note.php
 create mode 100644 src/Models/Tag.php
 create mode 100644 src/Schema.php
 create mode 100644 src/Search/AbstractFTSExpr.php
 create mode 100644 src/Search/CharSource.php
 create mode 100644 src/Search/FTSExpr.php
 create mode 100644 src/Search/FTSLogicOp.php
 create mode 100644 src/Search/FTSNotExpr.php
 create mode 100644 src/Search/LogicOp.php
 create mode 100644 src/Search/NotOp.php
 create mode 100644 src/Search/Pagination.php
 create mode 100644 src/Search/ParseError.php
 create mode 100644 src/Search/Parser.php
 create mode 100644 src/Search/SQLSearchExpr.php
 create mode 100644 src/Search/SearchExpr.php
 create mode 100644 src/Search/SearchResult.php
 create mode 100644 src/Search/TagExpr.php
 create mode 100644 src/Search/TrueExpr.php
 create mode 100644 src/Tools/PopulateDevDb.php
 create mode 100644 templates/index.twig
 create mode 100644 templates/macros.twig
 create mode 100644 templates/new_note.twig
 create mode 100644 templates/note.twig
 create mode 100644 templates/search.twig
 create mode 100644 templates/skeleton.twig
 create mode 100644 tests/Search/ParserTest.php

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..48b8bf9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+vendor/
diff --git a/assets/interactive.js b/assets/interactive.js
new file mode 100644
index 0000000..05b7556
--- /dev/null
+++ b/assets/interactive.js
@@ -0,0 +1,293 @@
+$(function () {
+    function APIError(code, message) {
+        this.code = code;
+        this.message = message;
+    }
+
+    APIError.prototype.toString = function () {
+        return "APIError " + this.code + ": " + this.message;
+    };
+
+    function default_api_error_handler(data, code) {
+        throw new APIError(code, data);
+    }
+
+    function add_get_param(url, name, val) {
+        name = encodeURIComponent(name);
+        val = encodeURIComponent(val);
+
+        var separator = url.match(/\?/) === null ? "?" : "&";
+        return url + separator + name + "=" + val;
+    }
+
+    function add_get_params(url, params) {
+        for (var k in params) if (Object.prototype.hasOwnProperty.call(params, k))
+            url = add_get_param(url, k, params[k]);
+        return url;
+    }
+
+    function query_api(method, url, arguments, handler, error_handler) {
+        url = add_get_params(url, arguments);
+        error_handler = error_handler || default_api_error_handler;
+
+        var xhr = new XMLHttpRequest();
+
+        function wrap_handler(handler) {
+            return function () {
+                return handler(xhr.response, xhr.status, xhr);
+            }
+        }
+
+        xhr.addEventListener("load", wrap_handler(handler));
+        xhr.addEventListener("error", wrap_handler(error_handler));
+        xhr.open(method, url);
+        xhr.responseType = "json";
+        xhr.send();
+    }
+
+    function Autocomplete() {
+        var self = this;
+
+        this.root = $("<div>")
+            .addClass("autocomplete-root");
+        this.input = $("<input>")
+            .attr("type", "text")
+            .appendTo(this.root)
+            .on("keyup", function (ev) {
+                if (ev.key === "ArrowDown") self.change_selection(1);
+                if (ev.key === "ArrowUp") self.change_selection(-1);
+
+                self.change_listener();
+            })
+            .on("keydown", function (ev) {
+                if (ev.key === "Tab") {
+                    if (self.complete_current())
+                        ev.preventDefault();
+                }
+            })
+            .on("blur", function (ev) {
+                var visible = false;
+                if (ev.relatedTarget) {
+                    visible = $(ev.relatedTarget).closest(".autocomplete-root").get(0) === self.root.get(0);
+                }
+                self.set_visible(visible);
+            });
+        this.options = $("<ul>").appendTo(this.root)
+            .on("mouseout", function () {
+                self.mark_active_by_el(null);
+            });
+
+        this.abort = function () {};
+        this.get_suggestions = function (_, cb) { cb([]); };
+    }
+
+    Autocomplete.prototype.set_visible = function (visible) {
+        this.root.toggleClass("show-suggestions", !!visible);
+    };
+
+    Autocomplete.prototype.mark_active_by_el = function (el) {
+        this.options.find("li").each(function () {
+            var $cur = $(this);
+            $cur.toggleClass("active", this === el);
+        });
+    };
+
+    Autocomplete.prototype.change_listener = function () {
+        var self = this;
+
+        this.abort();
+
+        var input_text = this.input.val();
+        if (input_text === "") {
+            this.set_visible(false);
+            return;
+        }
+        
+        this.get_suggestions(input_text, function (suggestions) {
+            console.log(suggestions);
+            suggestions = Array.prototype.slice.call(suggestions, 0);
+            suggestions.sort();
+            var items = suggestions.map(function (s) {
+                var found;
+                self.options.find("li").each(function () {
+                    var el = $(this);
+                    if (el.text() === s) {
+                        found = el;
+                        return false;
+                    }
+                });
+
+                if (found)
+                    return found;
+
+                return $("<li>").text(s).attr("tabindex", 0)
+                    .on("click", function (ev) {
+                        ev.preventDefault();
+                        self.apply_completion($(this).text());
+                    })
+                    .on("mouseover", function () {
+                        self.mark_active_by_el(this);
+                    });
+            });
+            self.options.empty();
+            for (var i = 0; i < items.length; i++)
+                self.options.append(items[i]);
+
+            if (!self.options.find("li.active").length)
+                self.options.find("li").first().addClass("active");
+
+            self.set_visible(self.options.find("li").length > 0);
+        });
+    };
+
+    Autocomplete.prototype.change_selection = function (d) {
+        var lis = this.options.find("li");
+        if (lis.length === 0)
+            return;
+
+        var idx = lis.index(lis.filter(".active"));
+        if (idx < 0)
+            idx = 0;
+        idx += d;
+        idx %= lis.length;
+        lis.removeClass("active");
+        lis.eq(idx).addClass("active");
+    };
+
+    Autocomplete.prototype.complete_current = function () {
+        var cur = this.options.find("li.active");
+        if (cur.length !== 1)
+            return false;
+
+        this.apply_completion(cur.text());
+        this.change_listener();
+        return true;
+    };
+
+    Autocomplete.prototype.apply_completion = function (text) {
+        this.input.val(text);
+    };
+
+    var Tags = (function () {
+        var tags;
+
+        function get(callback) {
+            if (tags !== undefined) {
+                callback(tags);
+                return;
+            }
+
+            query_api("GET", "/api/tags", {}, function (resp) {
+                if (Object.prototype.toString.call(resp) !== "[object Array]") {
+                    throw "Unexpeced return value from /api/tags";
+                }
+                tags = resp;
+                callback(tags);
+            });
+        }
+
+        return {
+            get: get,
+            clear_cache: function () { tags = null; }
+        };
+    })();
+
+    function selectedTag(tag) {
+        return $("<div>")
+            .addClass("tag")
+            .text(tag)
+            .append($("<input>")
+                .attr({
+                    name: "tag[]",
+                    type: "hidden",
+                })
+                .val(tag)
+            )
+            .prepend($("<button>")
+                .attr("type", "button")
+                .addClass("delete")
+                .text("X")
+                .on("click", function () {
+                    $(this).closest(".tag").remove();
+                })
+            );
+    }
+
+    $("fieldset.tags").each(function () {
+        var $this = $(this);
+        var label = $this.find("legend").text();
+
+        $this.find("input").map(function () { return $(this).val(); }).get().filter(x => !!x);
+
+        var out = $("<div>")
+            .addClass("tag-input labelled")
+            .append($("<label>").text(label).attr("for", "tag-input-field"));
+        var content = $("<div>").addClass("labelled-input").appendTo(out);
+        var tag_list = $("<div>").append($this.find("input")
+            .filter(function () {
+                return !!$(this).val();
+            })
+            .map(function () {
+                return selectedTag($(this).val());
+            }).get()
+        );
+        content.append(tag_list);
+
+        var ac = new Autocomplete();
+        ac.get_suggestions = function (text, callback) {
+            text = String.prototype.toLowerCase.call(text);
+            Tags.get(function (tags) {
+                console.log(["tags", tags]);
+                tags = Array.prototype.filter.call(tags, function (it) {
+                    it = String.prototype.toLowerCase.call(it);
+                    return it.indexOf(text) > -1;
+                });
+                console.log(["filtered", tags]);
+                callback(tags);
+            });
+        };
+        ac.apply_completion = function (text) {
+            ac.input.val("");
+            tag_list.append(selectedTag(text));
+        };
+
+        ac.input
+            .attr({
+                name: "tag[]",
+                id: "tag-input-field",
+                placeholder: "Another tag"
+            })
+            .addClass("tag-user-input")
+            .on("keydown", function (ev) {
+                if (ev.key === "Enter") {
+                    ev.preventDefault();
+
+                    if (ev.ctrlKey) {
+                        $(this).closest("form").each(function () {
+                            this.submit();
+                        });
+                        return;
+                    }
+
+                    var tag = $(this).val().trim();
+                    if (tag === "")
+                        return;
+
+                    tag_list.append(selectedTag(tag));
+                    $(this).val("");
+                } else if (ev.key === "Backspace") {
+                    if ($(this).val() === "") {
+                        tag_list.find(".tag").last().remove();
+                    }
+                }
+            });
+        content.append(ac.root);
+
+        $this.after(out).remove();
+    });
+
+    $("button.confirm").on("click", function (ev) {
+        if (!window.confirm($(this).data("question")))
+            ev.preventDefault();
+    })
+});
\ No newline at end of file
diff --git a/assets/styles.css b/assets/styles.css
new file mode 100644
index 0000000..b9fca4d
--- /dev/null
+++ b/assets/styles.css
@@ -0,0 +1,232 @@
+html {
+    --tag-bgcolor: hsl(200, 87.8%, 35.5%);
+    --tag-fgcolor: white;
+    --fg: #f9f9f9;
+    --bg: #22222f;
+    --bg-2: #333;
+    --bg-2-highlight: #444;
+    --fg-link-normal: #7187d7;
+    --fg-link-active: #ff3f00;
+    --fg-link-visited: #9f71d7;
+    --col-separator: #aaa;
+}
+
+html {
+    background: var(--bg);
+    color: var(--fg);
+    margin: 0;
+    padding: 1rem;
+    font-family: sans-serif;
+}
+
+body {
+    width: 85%;
+    margin: 10px auto;
+    padding: 0;
+}
+
+@media screen and (max-width: 400px) {
+    body {
+        width: auto;
+        margin: 10px 4px;
+    }
+}
+
+a:link {
+  color: var(--fg-link-normal);
+  text-decoration: none;
+}
+a:link:hover {
+  text-decoration: underline;
+}
+a:link:active {
+  color: var(--fg-link-active);
+}
+a:link:visited {
+  color: var(--fg-link-visited);
+}
+
+.tag {
+    background: var(--tag-bgcolor);
+    color: var(--tag-fgcolor);
+    padding: 5px;
+    display: inline-block;
+    border-radius: 3px;
+    position: relative;
+    height: 1em;
+}
+
+.tag a {
+    color: inherit;
+    text-decoration: none;
+}
+
+.tag a:hover {
+    text-decoration: underline;
+}
+
+.tc-1 { font-size: 0.7em; }
+.tc-2 { font-size: 0.8em; }
+.tc-3 { font-size: 0.9em; }
+.tc-4 { font-size: 1em; }
+.tc-5 { font-size: 1.1em; }
+
+.tag-input .delete {
+    background: var(--tag-bgcolor);
+    border: 1px solid var(--tag-fgcolor);
+    margin: 2px 6px 2px 2px;
+    padding: 1px;
+    color: var(--tag-fgcolor);
+    border-radius: 3px;
+    display: inline-block;
+    font-size: 0.8em;
+    font-family: sans-serif;
+    transition: background 0.2s, color 0.2s;
+    cursor: pointer;
+}
+
+.tag-input .delete:hover {
+    background: var(--tag-fgcolor);
+    color: var(--tag-bgcolor);
+}
+
+.tag-input .labelled-input {
+    display: flex;
+    flex-wrap: wrap;
+    padding: 6px;
+    border-radius: 3px;
+    background-color: var(--bg-2);
+}
+
+.tag-input .labelled-input:hover {
+    background-color: var(--bg-2-highlight);
+}
+
+.tag-user-input {
+    flex-grow: 1;
+    min-width: 250px;
+    background: transparent;
+    border: none;
+    color: inherit;
+    font-size: inherit;
+    border-bottom: 1px solid var(--bg);
+}
+
+#note-content {
+    background: transparent;
+    color: inherit;
+    border: 1px solid var(--fg);
+    margin: 0;
+    padding: 5px;
+    width: calc(100% - 12px);
+    min-height: 5em;
+    height: 50vh;
+}
+
+@media screen and (max-width: 200px) {
+    .tag-user-input {
+        min-width: 90vw;
+    }
+}
+
+header {
+    margin: 0 0 10px;
+    padding: 0 0 10px;
+    border-bottom: 1px solid var(--col-separator);
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    justify-content: space-between;
+}
+
+.mainmenu ul {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+}
+
+.mainmenu li {
+    display: inline-block;
+}
+
+.mainmenu li:not(:first-child) {
+    margin-left: 10px;
+}
+
+.mainmenu a {
+    color: var(--fg);
+}
+
+.homelink {
+    letter-spacing: 3px;
+}
+
+.s-search {
+    flex-grow: 1;
+}
+
+.search-form {
+    display: flex;
+}
+.search-input {
+    background: transparent;
+    color: inherit;
+    border: 0;
+    padding: 4px 10px;
+    border-bottom: 1px solid var(--col-separator);
+    transition: 0.3s border-bottom-color;
+}
+
+.search-input:hover, .search-input:focus {
+    border-bottom-color: var(--fg);
+}
+
+.search-input {
+    flex-grow: 1;
+}
+
+input:placeholder-shown {
+    font-style: italic;
+}
+
+.note-list {
+    list-style: none;
+    padding: 0;
+}
+
+.note-list > li {
+    background: #444;
+    margin: 10px 0;
+    padding: 3px 8px;
+    border-radius: 3px;
+}
+
+.autocomplete-root {
+    position: relative;
+    display: inline-block;
+}
+
+.autocomplete-root ul {
+	display: block;
+	list-style: none;
+	margin: 0;
+	padding: 0;
+	position: absolute;
+	z-index: 1;
+	background: var(--bg-2);
+	min-width: 200px;
+	border: 1px solid var(--bg);
+}
+
+.autocomplete-root li {
+	padding: 4px 10px;
+}
+
+.autocomplete-root li.active {
+	background: var(--fg);
+	color: var(--bg);
+}
+
+.autocomplete-root:not(.show-suggestions) ul {
+	display: none;
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..1d1013a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,27 @@
+{
+  "name": "code.laria.me/micropoly",
+  "type": "project",
+  "require": {
+    "twig/twig": "^3.0",
+    "nikic/fast-route": "^1.3",
+    "components/jquery": "^3.4",
+    "php": "^7.4",
+    "ext-sqlite3": "*",
+    "monolog/monolog": "^2.0"
+  },
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Laria Carolin Chabowski",
+      "email": "laria@laria.me"
+    }
+  ],
+  "autoload": {
+    "psr-4": {
+      "Micropoly\\": "src"
+    }
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^8.5"
+  }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..c86aa24
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1877 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "8737ddb39e6b9fed8221a8b8178c682b",
+    "packages": [
+        {
+            "name": "components/jquery",
+            "version": "3.4.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/components/jquery.git",
+                "reference": "901828b7968b18319e377dc23d466f28426ee083"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/components/jquery/zipball/901828b7968b18319e377dc23d466f28426ee083",
+                "reference": "901828b7968b18319e377dc23d466f28426ee083",
+                "shasum": ""
+            },
+            "type": "component",
+            "extra": {
+                "component": {
+                    "scripts": [
+                        "jquery.js"
+                    ],
+                    "files": [
+                        "jquery.min.js",
+                        "jquery.min.map",
+                        "jquery.slim.js",
+                        "jquery.slim.min.js",
+                        "jquery.slim.min.map"
+                    ]
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "JS Foundation and other contributors"
+                }
+            ],
+            "description": "jQuery JavaScript Library",
+            "homepage": "http://jquery.com",
+            "time": "2019-10-23T05:15:13+00:00"
+        },
+        {
+            "name": "monolog/monolog",
+            "version": "2.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Seldaek/monolog.git",
+                "reference": "c861fcba2ca29404dc9e617eedd9eff4616986b8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/c861fcba2ca29404dc9e617eedd9eff4616986b8",
+                "reference": "c861fcba2ca29404dc9e617eedd9eff4616986b8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2",
+                "psr/log": "^1.0.1"
+            },
+            "provide": {
+                "psr/log-implementation": "1.0.0"
+            },
+            "require-dev": {
+                "aws/aws-sdk-php": "^2.4.9 || ^3.0",
+                "doctrine/couchdb": "~1.0@dev",
+                "elasticsearch/elasticsearch": "^6.0",
+                "graylog2/gelf-php": "^1.4.2",
+                "jakub-onderka/php-parallel-lint": "^0.9",
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+                "reference": "68609e1261d215ea5b21b7987539cbfbe156ec3e",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "ext-mbstring": "*",
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.1.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Volker Dusch",
+                    "email": "github@wallbash.com"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                },
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Provides the functionality to export PHP variables for visualization",
+            "homepage": "http://www.github.com/sebastianbergmann/exporter",
+            "keywords": [
+                "export",
+                "exporter"
+            ],
+            "time": "2019-09-14T09:02:43+00:00"
+        },
+        {
+            "name": "sebastian/global-state",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/global-state.git",
+                "reference": "edf8a461cf1d4005f19fb0b6b8b95a9f7fa0adc4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/edf8a461cf1d4005f19fb0b6b8b95a9f7fa0adc4",
+                "reference": "edf8a461cf1d4005f19fb0b6b8b95a9f7fa0adc4",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "ext-dom": "*",
+                "phpunit/phpunit": "^8.0"
+            },
+            "suggest": {
+                "ext-uopz": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Snapshotting of global state",
+            "homepage": "http://www.github.com/sebastianbergmann/global-state",
+            "keywords": [
+                "global state"
+            ],
+            "time": "2019-02-01T05:30:01+00:00"
+        },
+        {
+            "name": "sebastian/object-enumerator",
+            "version": "3.0.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-enumerator.git",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Traverses array structures and object graphs to enumerate all referenced objects",
+            "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
+            "time": "2017-08-03T12:35:26+00:00"
+        },
+        {
+            "name": "sebastian/object-reflector",
+            "version": "1.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/object-reflector.git",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-reflector/zipball/773f97c67f28de00d397be301821b06708fca0be",
+                "reference": "773f97c67f28de00d397be301821b06708fca0be",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Allows reflection of object attributes, including inherited and non-public ones",
+            "homepage": "https://github.com/sebastianbergmann/object-reflector/",
+            "time": "2017-03-29T09:07:27+00:00"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "reference": "5b0cd723502bac3b006cbf3dbf7a1e3fcefe4fa8",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^6.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2017-03-03T06:23:57+00:00"
+        },
+        {
+            "name": "sebastian/resource-operations",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/resource-operations.git",
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/resource-operations/zipball/4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "reference": "4d7a795d35b889bf80a0cc04e08d77cedfa917a9",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides a list of PHP built-in functions that operate on resources",
+            "homepage": "https://www.github.com/sebastianbergmann/resource-operations",
+            "time": "2018-10-04T04:07:39+00:00"
+        },
+        {
+            "name": "sebastian/type",
+            "version": "1.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "3aaaa15fa71d27650d62a948be022fe3b48541a3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/3aaaa15fa71d27650d62a948be022fe3b48541a3",
+                "reference": "3aaaa15fa71d27650d62a948be022fe3b48541a3",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "time": "2019-07-02T08:10:15+00:00"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "reference": "99732be0ddb3361e16ad77b68ba41efc8e979019",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.6"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2016-10-03T07:35:21+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.1.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "reference": "11336f6f84e16a720dae9d8e6ed5019efa85a0f9",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "time": "2019-06-13T22:48:21+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/assert.git",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/573381c0a64f155a0d9a23f4b0c797194805b925",
+                "reference": "573381c0a64f155a0d9a23f4b0c797194805b925",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.3.3 || ^7.0",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "vimeo/psalm": "<3.6.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.8.36 || ^7.5.13"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "time": "2019-11-24T13:36:37+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": "^7.4",
+        "ext-sqlite3": "*"
+    },
+    "platform-dev": []
+}
diff --git a/config.php b/config.php
new file mode 100644
index 0000000..5b7a17f
--- /dev/null
+++ b/config.php
@@ -0,0 +1,6 @@
+<?php
+return [
+    "templates_path" => __DIR__ . "/templates",
+    "templates_cache" => false, //__DIR__ . "/.templates_cache",
+    "sqlitedb" => __DIR__ . "/notes.db",
+];
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..cf4c3cc
--- /dev/null
+++ b/index.php
@@ -0,0 +1,25 @@
+<?php
+
+use Micropoly\Entrypoint;
+use Micropoly\Main;
+
+function micropoly_main()
+{
+    if (php_sapi_name() == 'cli-server') {
+        if (preg_match('/^\/(assets|vendor\/components)/', $_SERVER["REQUEST_URI"]))
+            return false;
+    }
+
+    require_once "vendor/autoload.php";
+    $cls = Main::class;
+    if (php_sapi_name() === "cli" && isset($GLOBALS["argv"][1]))
+        $cls = $GLOBALS["argv"][1];
+
+    $obj = new $cls();
+    if (!($obj instanceof Entrypoint))
+        throw new Exception("$cls is not a " . Entrypoint::class);
+
+    $obj->run(\Micropoly\Env::fromConfig(require "config.php"));
+}
+
+return micropoly_main();
\ No newline at end of file
diff --git a/src/BoundVal.php b/src/BoundVal.php
new file mode 100644
index 0000000..7a3560a
--- /dev/null
+++ b/src/BoundVal.php
@@ -0,0 +1,36 @@
+<?php
+
+
+namespace Micropoly;
+
+
+use SQLite3Stmt;
+
+class BoundVal
+{
+    private $val;
+    private $type = null;
+
+    public function __construct($val, $type = null)
+    {
+        $this->val = $val;
+        $this->type = $type;
+    }
+
+    public function getVal() { return $this->val; }
+    public function getType() { return $this->type; }
+
+    public static function ofInt($val): self { return new self($val, SQLITE3_INTEGER); }
+    public static function ofFloat($val): self { return new self($val, SQLITE3_FLOAT); }
+    public static function ofText($val): self { return new self($val, SQLITE3_TEXT); }
+    public static function ofBlob($val): self { return new self($val, SQLITE3_BLOB); }
+    public static function ofNull($val): self { return new self($val, SQLITE3_NULL); }
+
+    public function bind(SQLite3Stmt $stmt, $where): void
+    {
+        if ($this->type === null)
+            $stmt->bindValue($where, $this->val);
+        else
+            $stmt->bindValue($where, $this->val, $this->type);
+    }
+}
\ No newline at end of file
diff --git a/src/DBError.php b/src/DBError.php
new file mode 100644
index 0000000..4860d2f
--- /dev/null
+++ b/src/DBError.php
@@ -0,0 +1,31 @@
+<?php
+
+
+namespace Micropoly;
+
+
+use Exception;
+
+class DBError extends Exception
+{
+    private string $msg;
+    private string $sql;
+
+    /**
+     * DBError constructor.
+     * @param string $msg
+     * @param string $sql
+     */
+    public function __construct(string $msg, string $sql)
+    {
+        $this->msg = $msg;
+        $this->sql = $sql;
+
+        parent::__construct($this->buildMessage());
+    }
+
+    private function buildMessage(): string
+    {
+        return "{$this->msg}. SQL was: {$this->sql}";
+    }
+}
\ No newline at end of file
diff --git a/src/DbQuery.php b/src/DbQuery.php
new file mode 100644
index 0000000..6fd32a1
--- /dev/null
+++ b/src/DbQuery.php
@@ -0,0 +1,197 @@
+<?php
+
+
+namespace Micropoly;
+
+
+use InvalidArgumentException;
+use Iterator;
+use SQLite3;
+use SQLite3Result;
+
+class DbQuery
+{
+    private string $query;
+
+    /** @var BoundVal[] */
+    private array $boundVals = [];
+
+    public function __construct(string $query)
+    {
+        $this->query = $query;
+    }
+
+    /**
+     * @param int|array $values
+     * @return string
+     */
+    public static function valueListPlaceholders($values): string
+    {
+        if (is_array($values))
+            $num = count($values);
+        elseif (is_int($values))
+            $num = $values;
+        else
+            throw new InvalidArgumentException("\$values must be an int or an array");
+
+        return implode(",", array_fill(0, $num, "?"));
+    }
+
+    public static function insert(SQLite3 $db, string $table, array $fields, array $records)
+    {
+        if (empty($records) || empty($fields))
+            return;
+
+        $recordTemplate = "(" . implode(",", array_fill(0, count($fields), "?")) . ")";
+        $query = new self("INSERT INTO $table (" . implode(',', $fields) . ") VALUES " . implode(",", array_fill(0, count($records), $recordTemplate)));
+
+        $i = 1;
+        $fieldCount = count($fields);
+        foreach ($records as $record) {
+            if (count($record) !== $fieldCount)
+                throw new InvalidArgumentException("count of all record fields must match field count!");
+
+            foreach ($record as $v) {
+                $query->bind($i, $v);
+                $i++;
+            }
+        }
+
+        $query->exec($db);
+    }
+
+    public static function insertKV(SQLite3 $db, string $table, array $kv)
+    {
+        self::insert($db, $table, array_keys($kv), [array_values($kv)]);
+    }
+
+    /**
+     * @param mixed $where Name/Index of parameter
+     * @param BoundVal|mixed $val
+     * @return $this
+     */
+    public function bind($where, $val): self
+    {
+        if (!($val instanceof BoundVal))
+            $val = new BoundVal($val, null);
+
+
+        $this->boundVals[$where] = $val;
+        return $this;
+    }
+
+    private function bindMulti(array $vals, $type, int $offset): self
+    {
+        foreach ($vals as $i => $v)
+            $this->bind($i + $offset, new BoundVal($v, $type));
+
+        return $this;
+    }
+
+    public function bindMultiAuto(array $vals, int $offset = 1): self { return $this->bindMulti($vals, null, $offset); }
+    public function bindMultiInt(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_INTEGER, $offset); }
+    public function bindMultiFloat(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_FLOAT, $offset); }
+    public function bindMultiText(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_TEXT, $offset); }
+    public function bindMultiBlob(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_BLOB, $offset); }
+    public function bindMultiNull(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_NULL, $offset); }
+
+    /**
+     * @param SQLite3 $db
+     * @param callable|null $cb
+     * @return mixed Result of callback or null, if none given
+     * @throws DBError
+     */
+    public function exec(SQLite3 $db, ?callable $cb = null)
+    {
+        $stmt = $db->prepare($this->query);
+        if ($stmt === false)
+            throw new DBError("Prepare failed", $this->query);
+        foreach ($this->boundVals as $where => $boundVal)
+            $boundVal->bind($stmt, $where);
+
+        $res = $stmt->execute();
+        if ($res === false) {
+            throw new DBError("execute failed", $this->query);
+        }
+
+        $out = $cb ? $cb($res) : null;
+
+        $res->finalize();
+        $stmt->close();
+
+        return $out;
+    }
+
+    public function fetchRow(SQLite3 $db, int $fetchMode = SQLITE3_NUM): ?array
+    {
+        return $this->exec($db, static function (SQLite3Result $res) use ($fetchMode) {
+            return $res->numColumns() ? $res->fetchArray($fetchMode) : null;
+        });
+    }
+
+    public function fetchRowAssoc(SQLite3 $db): ?array { return $this->fetchRow($db, SQLITE3_ASSOC); }
+
+    public function fetchRows(SQLite3 $db, int $fetchMode = SQLITE3_NUM): array
+    {
+        return $this->exec($db, static function (SQLite3Result $res) use ($fetchMode) {
+            if (!$res->numColumns())
+                return [];
+
+            $out = [];
+
+            while (($row = $res->fetchArray($fetchMode)))
+                $out[] = $row;
+
+            return $out;
+        });
+    }
+
+    public function fetchRowsAssoc(SQLite3 $db): array { return $this->fetchRows($db, SQLITE3_ASSOC); }
+
+    public function fetchIndexedRows(SQLite3 $db, ...$keys): array
+    {
+        return $this->exec($db, static function (SQLite3Result $res) use ($keys) {
+            if (!$res->numColumns())
+                return [];
+
+            $out = [];
+
+            while (($row = $res->fetchArray(SQLITE3_ASSOC))) {
+                $cursor =& $out;
+
+                foreach ($keys as $k)
+                    $cursor =& $cursor[$row[$k]];
+
+                $cursor = $row;
+            }
+
+            return $out;
+        });
+    }
+
+    public function fetchIndexedValues(SQLite3 $db, $val, ...$keys): array
+    {
+        return array_map(fn ($row) => $row[$val] ?? null, $this->fetchIndexedRows($db, ...$keys));
+    }
+
+    public function fetchIndexedAllRows(SQLite3 $db, ...$keys): array
+    {
+        return $this->exec($db, static function (SQLite3Result $res) use ($keys) {
+            if (!$res->numColumns())
+                return [];
+
+            $out = [];
+
+            while (($row = $res->fetchArray(SQLITE3_ASSOC))) {
+                $cursor =& $out;
+
+                foreach ($keys as $k)
+                    $cursor =& $cursor[$row[$k]];
+
+                $cursor[] = $row;
+            }
+
+            return $out;
+        });
+    }
+}
\ No newline at end of file
diff --git a/src/Entrypoint.php b/src/Entrypoint.php
new file mode 100644
index 0000000..6fe3409
--- /dev/null
+++ b/src/Entrypoint.php
@@ -0,0 +1,10 @@
+<?php
+
+
+namespace Micropoly;
+
+
+interface Entrypoint
+{
+    public function run(Env $env);
+}
\ No newline at end of file
diff --git a/src/Env.php b/src/Env.php
new file mode 100644
index 0000000..34b9f1f
--- /dev/null
+++ b/src/Env.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Micropoly;
+
+use SQLite3;
+use Twig\Environment;
+use Twig\Loader\FilesystemLoader;
+use Twig\TwigFilter;
+use Twig\TwigFunction;
+
+class Env
+{
+    private array $config;
+
+    private function __construct() { }
+
+    private array $lazyLoaded = [];
+
+    private function lazy(string $ident, callable $callback)
+    {
+        if (!isset($this->lazyLoaded[$ident])) {
+            $this->lazyLoaded[$ident] = $callback();
+        }
+        return $this->lazyLoaded[$ident];
+    }
+
+    public static function fromConfig(array $config)
+    {
+        $env = new self;
+        $env->config = $config;
+        return $env;
+    }
+
+    public function documentRoot(): string { return "/"; }
+
+    public function twig(): Environment
+    {
+        return $this->lazy("twig", function () {
+            $loader = new FilesystemLoader($this->config["templates_path"]);
+            $env = new Environment($loader, [
+                "cache" => $this->config["templates_cache"],
+            ]);
+
+            $env->addFunction(new TwigFunction("url", function (string $url, ...$args) {
+                return $this->documentRoot() . sprintf($url, ...$args);
+            }, ["is_variadic" => true]));
+
+            $env->addFilter(new TwigFilter("search_escape", static function (string $s) {
+                $s = str_replace("\\", "\\\\", $s);
+                $s = str_replace("#", "\\#", $s);
+                $s = str_replace(" ", "\\ ", $s);
+                $s = str_replace("\t", "\\\t", $s);
+                $s = str_replace("(", "\\(", $s);
+                $s = str_replace(")", "\\)", $s);
+                return $s;
+            }));
+
+            return $env;
+        });
+    }
+
+    public function rawDbCon(): SQLite3
+    {
+        return $this->lazy("rawDbCon", function () {
+            return new SQLite3($this->config["sqlitedb"]);
+        });
+    }
+
+    public function db(): SQLite3
+    {
+        return $this->lazy("db", function () {
+            $db = $this->rawDbCon();
+            $db->exec("PRAGMA foreign_keys = ON");
+
+            (new Schema($db))->migrate();
+
+            return $db;
+        });
+    }
+}
diff --git a/src/Esc.php b/src/Esc.php
new file mode 100644
index 0000000..5c290b6
--- /dev/null
+++ b/src/Esc.php
@@ -0,0 +1,21 @@
+<?php
+
+
+namespace Micropoly;
+
+
+class Esc
+{
+    public const HTML = 1;
+    public const NL2BR = 2;
+    public const HTML_WITH_BR = self::HTML | self::NL2BR;
+
+    public static function e(string $s, int $flags = self::HTML): string
+    {
+        if ($flags & self::HTML)
+            $s = htmlspecialchars($s);
+        if ($flags & self::NL2BR)
+            $s = nl2br($s);
+        return $s;
+    }
+}
\ No newline at end of file
diff --git a/src/Handler.php b/src/Handler.php
new file mode 100644
index 0000000..be6cad9
--- /dev/null
+++ b/src/Handler.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Micropoly;
+
+use Micropoly\Env;
+
+interface Handler
+{
+    public function handle(Env $env, array $variables);
+}
diff --git a/src/Handlers/ApiTagsHandler.php b/src/Handlers/ApiTagsHandler.php
new file mode 100644
index 0000000..af9fb7b
--- /dev/null
+++ b/src/Handlers/ApiTagsHandler.php
@@ -0,0 +1,16 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+
+use Micropoly\Env;
+use Micropoly\Models\Tag;
+
+class ApiTagsHandler extends JsonAPIHandler
+{
+    protected function handleAPIRequest(Env $env, array $variables): JsonAPIResult
+    {
+        return new JsonAPIResult(array_keys(Tag::getTagCounts($env->db())));
+    }
+}
\ No newline at end of file
diff --git a/src/Handlers/Index.php b/src/Handlers/Index.php
new file mode 100644
index 0000000..8d0896b
--- /dev/null
+++ b/src/Handlers/Index.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace Micropoly\Handlers;
+
+use Micropoly\Env;
+use Micropoly\Handler;
+use Micropoly\Models\Tag;
+
+class Index implements Handler
+{
+
+    public function handle(Env $env, array $variables)
+    {
+        echo $env->twig()->render("/index.twig", [
+            "title" => "hello",
+            "msg" => "Johoo <script>alert(1)</script>",
+            "tagcloud" => Tag::calcTagCloud(Tag::getTagCounts($env->db())),
+        ]);
+    }
+}
diff --git a/src/Handlers/JsonAPIHandler.php b/src/Handlers/JsonAPIHandler.php
new file mode 100644
index 0000000..cc6aa61
--- /dev/null
+++ b/src/Handlers/JsonAPIHandler.php
@@ -0,0 +1,18 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+
+use Micropoly\Env;
+use Micropoly\Handler;
+
+abstract class JsonAPIHandler implements Handler
+{
+    abstract protected function handleAPIRequest(Env $env, array $variables): JsonAPIResult;
+
+    public function handle(Env $env, array $variables)
+    {
+        $this->handleAPIRequest($env, $variables)->send();
+    }
+}
\ No newline at end of file
diff --git a/src/Handlers/JsonAPIResult.php b/src/Handlers/JsonAPIResult.php
new file mode 100644
index 0000000..905599c
--- /dev/null
+++ b/src/Handlers/JsonAPIResult.php
@@ -0,0 +1,24 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+
+class JsonAPIResult
+{
+    public $data;
+    public int $statuscode = 200;
+
+    public function __construct($data, int $statuscode = 200)
+    {
+        $this->data = $data;
+        $this->statuscode = $statuscode;
+    }
+
+    public function send(): void
+    {
+        http_response_code($this->statuscode);
+        header("Content-Type: application/json; charset=UTF-8");
+        echo json_encode($this->data);
+    }
+}
\ No newline at end of file
diff --git a/src/Handlers/MethodNotAllowedHandler.php b/src/Handlers/MethodNotAllowedHandler.php
new file mode 100644
index 0000000..53ddb0e
--- /dev/null
+++ b/src/Handlers/MethodNotAllowedHandler.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace Micropoly\Handlers;
+
+use Micropoly\Env;
+use Micropoly\Handler;
+
+class MethodNotAllowedHandler implements Handler
+{
+    public function handle(\Micropoly\Env $env, array $variables)
+    {
+
+    }
+}
diff --git a/src/Handlers/NewNote.php b/src/Handlers/NewNote.php
new file mode 100644
index 0000000..9c60757
--- /dev/null
+++ b/src/Handlers/NewNote.php
@@ -0,0 +1,40 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+
+use Micropoly\Env;
+use Micropoly\Esc;
+use Micropoly\Handler;
+use Micropoly\Models\Note;
+
+class NewNote implements Handler
+{
+    private static function getPostedContent(): ?string
+    {
+        if (empty($_POST["content"]))
+            return null;
+
+        $content = trim((string)$_POST["content"]);
+        return empty($content) ? null : $content;
+    }
+
+    public function handle(Env $env, array $variables)
+    {
+        $content = self::getPostedContent();
+        if ($content !== null) {
+            $note = new Note();
+            $note->setContent($content);
+            $note->setTags($_POST["tag"]);
+            $note->save($env->db());
+
+            $url = $env->documentRoot() . "n/" . $note->getId();
+            http_response_code(303);
+            header("Location: {$url}");
+            echo 'Note created: <a href="' . Esc::e($url) . '">';
+        }
+
+        echo $env->twig()->render("/new_note.twig", []);
+    }
+}
\ No newline at end of file
diff --git a/src/Handlers/NotFoundHandler.php b/src/Handlers/NotFoundHandler.php
new file mode 100644
index 0000000..1827995
--- /dev/null
+++ b/src/Handlers/NotFoundHandler.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace Micropoly\Handlers;
+
+use Micropoly\Env;
+use Micropoly\Handler;
+
+class NotFoundHandler implements Handler
+{
+    public function handle(Env $env, array $variables)
+    {
+        http_response_code(404);
+        echo "404";
+    }
+}
diff --git a/src/Handlers/NoteHandler.php b/src/Handlers/NoteHandler.php
new file mode 100644
index 0000000..afdabb5
--- /dev/null
+++ b/src/Handlers/NoteHandler.php
@@ -0,0 +1,39 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+
+use Micropoly\Env;
+use Micropoly\Handler;
+use Micropoly\Models\Note;
+
+class NoteHandler implements Handler
+{
+    public function handle(Env $env, array $variables)
+    {
+        $db = $env->db();
+
+        $note = Note::byId($db, $variables["id"]);
+        if ($note === null) {
+            (new NotFoundHandler())->handle($env, []);
+            return;
+        }
+
+        if ($_SERVER["REQUEST_METHOD"] === "POST") {
+            if ($_POST["delete"] === "delete") {
+                $note->delete($db);
+                http_response_code(303);
+                $url = $env->documentRoot();
+                header("Location: {$url}");
+                return;
+            }
+
+            $note->setContent($_POST["content"]);
+            $note->setTags($_POST["tag"]);
+            $note->save($db);
+        }
+
+        echo $env->twig()->render("/note.twig", ["note" => $note]);
+    }
+}
\ No newline at end of file
diff --git a/src/Handlers/Search.php b/src/Handlers/Search.php
new file mode 100644
index 0000000..30311ea
--- /dev/null
+++ b/src/Handlers/Search.php
@@ -0,0 +1,33 @@
+<?php
+
+
+namespace Micropoly\Handlers;
+
+use Micropoly\Env;
+use Micropoly\Handler;
+use Micropoly\Models\Note;
+use Micropoly\Search\ParseError;
+use Micropoly\Search\Parser;
+use Micropoly\Search\SearchResult;
+use Micropoly\Search\TrueExpr;
+
+class Search implements Handler
+{
+    public function handle(Env $env, array $variables)
+    {
+        $vars = ["query" => $_GET["q"] ?? ""];
+
+        try {
+            $expr = isset($_GET["q"])
+                ? (Parser::parse($_GET["q"]) ?? new TrueExpr())
+                : new TrueExpr();
+
+            $results = SearchResult::search($env->db(), $expr);
+            $vars["results"] = $results;
+        } catch (ParseError $e) {
+            $vars["error"] = $e->getMessage();
+        }
+
+        echo $env->twig()->render("/search.twig", $vars);
+    }
+}
\ No newline at end of file
diff --git a/src/Log.php b/src/Log.php
new file mode 100644
index 0000000..fce455f
--- /dev/null
+++ b/src/Log.php
@@ -0,0 +1,27 @@
+<?php
+
+
+namespace Micropoly;
+
+
+use Monolog\Handler\ErrorLogHandler;
+use Monolog\Logger;
+use Psr\Log\LoggerInterface;
+
+class Log
+{
+    public static function logger(): LoggerInterface
+    {
+        static $logger = null;
+        if ($logger === null)
+            $logger = self::initLogger();
+        return $logger;
+    }
+
+    private static function initLogger(): Logger
+    {
+        $logger = new Logger("logger");
+        $logger->pushHandler(new ErrorLogHandler());
+        return $logger;
+    }
+}
\ No newline at end of file
diff --git a/src/Main.php b/src/Main.php
new file mode 100644
index 0000000..443960b
--- /dev/null
+++ b/src/Main.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Micropoly;
+
+use Closure;
+use FastRoute\Dispatcher;
+use FastRoute\RouteCollector;
+use Micropoly\Handlers\ApiTagsHandler;
+use Micropoly\Handlers\Index;
+use Micropoly\Handlers\MethodNotAllowedHandler;
+use Micropoly\Handlers\NewNote;
+use Micropoly\Handlers\NoteHandler;
+use Micropoly\Handlers\NotFoundHandler;
+
+use Micropoly\Handlers\Search;
+use function FastRoute\simpleDispatcher;
+
+class Main implements Entrypoint
+{
+    private static function buildRoutes(RouteCollector $r)
+    {
+        $r->addRoute(["GET"], "/", Index::class);
+        $r->addRoute(["GET", "POST"], "/new-note", NewNote::class);
+        $r->addRoute(["GET"], "/search", Search::class);
+        $r->addRoute(["GET", "POST"], "/n/{id}", NoteHandler::class);
+        $r->addRoute(["GET"], "/api/tags", ApiTagsHandler::class);
+    }
+
+    public function run(Env $env)
+    {
+        $disp = simpleDispatcher(Closure::fromCallable([self::class, "buildRoutes"]));
+
+        $uri = preg_replace('/\?.*$/', "", $_SERVER["REQUEST_URI"]);
+        $result = $disp->dispatch($_SERVER["REQUEST_METHOD"], $uri);
+        switch ($result[0]) {
+            case Dispatcher::NOT_FOUND:
+                $handlerCls = NotFoundHandler::class;
+                $vars = [];
+                break;
+            case Dispatcher::FOUND:
+                [, $handlerCls, $vars] = $result;
+                break;
+            case Dispatcher::METHOD_NOT_ALLOWED:
+                $handlerCls = MethodNotAllowedHandler::class;
+                $vars = ["allowed" => $result[1]];
+                break;
+            default:
+                throw new \DomainException("Unexpected routing result: {$result[0]}");
+        }
+
+        $handler = new $handlerCls();
+        if (!($handler instanceof Handler)) {
+            throw new \DomainException("handler is not an instance of ".Handler::class);
+        }
+
+        $handler->handle($env, $vars);
+    }
+}
diff --git a/src/Models/Note.php b/src/Models/Note.php
new file mode 100644
index 0000000..901f5aa
--- /dev/null
+++ b/src/Models/Note.php
@@ -0,0 +1,250 @@
+<?php
+
+
+namespace Micropoly\Models;
+
+
+use Micropoly\BoundVal;
+use Micropoly\DbQuery;
+use Micropoly\Search\SearchExpr;
+use SQLite3;
+
+class Note
+{
+    private bool $savedToDb = false;
+    private string $id;
+    private string $content;
+    private array $tags = [];
+    private bool $trash = false;
+
+    /**
+     * Note constructor.
+     */
+    public function __construct()
+    {
+        $this->id = uniqid("", true);
+    }
+
+    /**
+     * @param SQLite3 $db
+     * @param DbQuery $query
+     * @return self[]
+     */
+    private static function fromQuery(SQLite3 $db, DbQuery $query): array
+    {
+        $out = [];
+
+        foreach ($query->fetchRowsAssoc($db) as $row) {
+            $note = new self();
+
+            $note->savedToDb = true;
+            $note->id = $row["id"];
+            $note->content = $row["content"];
+            $note->trash = (bool)(int)$row["trash"];
+
+            $out[$row["id"]] = $note;
+        }
+
+        if (!empty($out)) {
+            $q = (new DbQuery("SELECT tag, note_id FROM tags WHERE note_id IN (" . DbQuery::valueListPlaceholders($out) . ")"))
+                ->bindMultiText(array_keys($out));
+
+            foreach ($q->fetchRows($db) as [$tag, $id]) {
+                $out[$id]->tags[] = $tag;
+            }
+        }
+
+        return $out;
+    }
+
+    /**
+     * @param SQLite3 $db
+     * @param array $ids
+     * @return self[] indexes by id
+     */
+    public static function byIds(SQLite3 $db, array $ids): array
+    {
+        if (empty($ids))
+            return [];
+
+        $query = (new DbQuery("
+            SELECT note.id, content.content, note.trash
+            FROM notes note
+            INNER JOIN note_contents content
+                ON content.rowid = note.content_row
+            WHERE id IN (" . DbQuery::valueListPlaceholders($ids) . ")
+        "))->bindMultiText($ids);
+
+        return self::fromQuery($db, $query);
+    }
+
+    public static function byId(SQLite3 $db, string $id): ?self
+    {
+        return self::byIds($db, [$id])[$id] ?? null;
+    }
+
+    /**
+     * @return string
+     */
+    public function getId(): string
+    {
+        return $this->id;
+    }
+
+    /**
+     * @return string
+     */
+    public function getContent(): string
+    {
+        return $this->content;
+    }
+
+    /**
+     * @param string $content
+     * @return Note
+     */
+    public function setContent(string $content): Note
+    {
+        $this->content = $content;
+        return $this;
+    }
+
+    /**
+     * @return array
+     */
+    public function getTags(): array
+    {
+        return $this->tags;
+    }
+
+    /**
+     * @param array $tags
+     * @return Note
+     */
+    public function setTags(array $tags): Note
+    {
+        $tags = array_map("trim", $tags);
+        $tags = array_filter($tags);
+        $tags = array_unique($tags);
+
+        $this->tags = $tags;
+        return $this;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isTrash(): bool
+    {
+        return $this->trash;
+    }
+
+    /**
+     * @param bool $trash
+     * @return Note
+     */
+    public function setTrash(bool $trash): Note
+    {
+        $this->trash = $trash;
+        return $this;
+    }
+
+    private function deleteContent(SQLite3 $db)
+    {
+        (new DbQuery("DELETE FROM note_contents WHERE rowid IN (SELECT content_row FROM notes WHERE id = ?)"))
+            ->bind(1, BoundVal::ofText($this->id))
+            ->exec($db);
+    }
+
+    private function deleteTags(SQLite3 $db)
+    {
+        (new DbQuery("DELETE FROM tags WHERE note_id = ?"))
+            ->bind(1, BoundVal::ofText($this->id))
+            ->exec($db);
+    }
+
+    public function save(SQLite3 $db)
+    {
+        if ($this->savedToDb)
+            $this->update($db);
+        else
+            $this->insert($db);
+    }
+
+    private function insert(SQLite3 $db)
+    {
+        $db->exec("BEGIN");
+
+        $this->deleteContent($db);
+
+        DbQuery::insertKV($db, "note_contents", ["content" => BoundVal::ofText($this->content)]);
+        $rowid = (new DbQuery("SELECT last_insert_rowid()"))->fetchRow($db)[0];
+
+        DbQuery::insertKV($db, "notes", [
+            "id" => BoundVal::ofText($this->id),
+            "content_row" => BoundVal::ofInt($rowid),
+            "trash" => BoundVal::ofInt($this->trash ? 0 : 1),
+        ]);
+
+        $this->writeTags($db);
+
+        $db->exec("COMMIT");
+    }
+
+    private function update(SQLite3 $db)
+    {
+        $db->exec("BEGIN");
+
+        $this->deleteTags($db);
+
+        (new DbQuery("
+            UPDATE note_contents
+            SET content = :content
+            WHERE rowid = (
+                SELECT content_row
+                FROM notes
+                WHERE id = :id
+            )
+        "))
+            ->bind("content", BoundVal::ofText($this->content))
+            ->bind("id", BoundVal::ofText($this->id))
+            ->exec($db);
+
+        $this->writeTags($db);
+
+        (new DbQuery("
+            UPDATE notes
+            SET changed_at = CURRENT_TIMESTAMP,
+                trash = :trash
+            WHERE id = :id
+        "))
+            ->bind("id", BoundVal::ofText($this->id))
+            ->bind("trash", BoundVal::ofInt($this->trash ? 0 : 1))
+            ->exec($db);
+
+        $db->exec("COMMIT");
+    }
+
+    /**
+     * @param SQLite3 $db
+     */
+    private function writeTags(SQLite3 $db): void
+    {
+        $this->deleteTags($db);
+        DbQuery::insert($db,
+            "tags",
+            ["note_id", "tag"],
+            array_map(fn($t) => [BoundVal::ofText($this->id), BoundVal::ofText($t)], $this->tags)
+        );
+    }
+
+    public function delete(SQLite3 $db): void
+    {
+        $this->deleteTags($db);
+        $this->deleteContent($db);
+        (new DbQuery("DELETE FROM notes WHERE id = ?"))
+            ->bind(1, BoundVal::ofText($this->id))
+            ->exec($db);
+        $this->savedToDb = false;
+    }
+}
\ No newline at end of file
diff --git a/src/Models/Tag.php b/src/Models/Tag.php
new file mode 100644
index 0000000..b119fe8
--- /dev/null
+++ b/src/Models/Tag.php
@@ -0,0 +1,37 @@
+<?php
+
+
+namespace Micropoly\Models;
+
+
+use Micropoly\DbQuery;
+
+class Tag
+{
+    private const TAGCLOUD_MAGNITUDES = 5;
+
+    /**
+     * Calculates a tag cloud array to be used as an input to the tagcloud macro
+     * @param array $tagCounts [string tag => int count]
+     * @return array
+     */
+    public static function calcTagCloud(array $tagCounts): array
+    {
+        $tagCounts = array_map("intval", $tagCounts);
+        $tagCounts = array_filter($tagCounts, fn ($count) => $count !== 0);
+
+        if (empty($tagCounts))
+            return [];
+
+        $maxCount = max(array_values($tagCounts));
+        $tagCounts = array_map(fn ($count) => floor($count / ($maxCount+1) * self::TAGCLOUD_MAGNITUDES) + 1, $tagCounts);
+        ksort($tagCounts);
+        return $tagCounts;
+    }
+
+    public static function getTagCounts(\SQLite3 $db): array
+    {
+        return (new DbQuery("SELECT tag, num FROM tagcloud"))
+            ->fetchIndexedValues($db, "num", "tag");
+    }
+}
\ No newline at end of file
diff --git a/src/Schema.php b/src/Schema.php
new file mode 100644
index 0000000..bbb47de
--- /dev/null
+++ b/src/Schema.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Micropoly;
+
+use SQLite3;
+
+class Schema
+{
+    private SQLite3 $db;
+
+    /**
+     * @param SQLite3 $db
+     */
+    public function __construct(SQLite3 $db) { $this->db = $db; }
+
+    private function getSchemaVersion(): int
+    {
+        $n = $this->db->querySingle("SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'schema_meta'");
+        if ($n !== "schema_meta")
+            return 0;
+
+        return (int)$this->db->querySingle("SELECT value FROM schema_meta WHERE key = 'version'");
+    }
+
+    private function setSchemaVersion(int $v): void
+    {
+        (new DbQuery("REPLACE INTO schema_meta (key, value) VALUES ('version', :v)"))
+            ->bind(":v", $v)
+            ->exec($this->db);
+    }
+
+    public function migrate()
+    {
+        $version = $this->getSchemaVersion();
+
+        switch ($version) {
+            case 0:
+                $this->v1();
+                $this->setSchemaVersion(1);
+        }
+    }
+
+    private function v1()
+    {
+        $this->db->exec("
+            CREATE TABLE schema_meta (
+                key VARCHAR(100) NOT NULL PRIMARY KEY,
+                value
+            ) WITHOUT ROWID
+        ");
+        $this->db->exec("
+            CREATE VIRTUAL TABLE note_contents USING fts4 (content TEXT)
+        ");
+        $this->db->exec("
+            CREATE TABLE notes (
+                id VARCHAR(23) NOT NULL PRIMARY KEY,
+                content_row INT NOT NULL,
+                created_at BIGINT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                changed_at BIGINT NOT NULL DEFAULT CURRENT_TIMESTAMP,
+                trash INT NOT NULL DEFAULT 0
+            ) WITHOUT ROWID
+        ");
+        $this->db->exec("
+            CREATE TABLE tags (
+                note_id VARCHAR(23) NOT NULL REFERENCES notes (id) ON UPDATE CASCADE ON DELETE CASCADE,
+                tag TEXT NOT NULL,
+                PRIMARY KEY (note_id, tag)
+            ) WITHOUT ROWID
+        ");
+        $this->db->exec("CREATE INDEX tag ON tags (tag)");
+        $this->db->exec("
+            CREATE VIEW tagcloud AS
+                SELECT
+                    tag,
+                    COUNT(*) AS num
+                FROM tags
+                GROUP BY tag
+        ");
+    }
+}
diff --git a/src/Search/AbstractFTSExpr.php b/src/Search/AbstractFTSExpr.php
new file mode 100644
index 0000000..b72b1b6
--- /dev/null
+++ b/src/Search/AbstractFTSExpr.php
@@ -0,0 +1,31 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+abstract class AbstractFTSExpr implements SearchExpr
+{
+    abstract protected function fts4Query(): string;
+
+    public function toSQL(string $bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlex = new SQLSearchExpr();
+
+        $sqlex->sql = $singleFTS
+            ? "nc.note_contents MATCH :{$bindPrefix}match"
+            : "n.content_row IN (
+                SELECT rowid
+                FROM note_contents
+                WHERE note_contents MATCH :{$bindPrefix}match
+            )";
+        $sqlex->bindings["{$bindPrefix}match"] = $this->fts4Query();
+
+        return $sqlex;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return 1;
+    }
+}
\ No newline at end of file
diff --git a/src/Search/CharSource.php b/src/Search/CharSource.php
new file mode 100644
index 0000000..165e538
--- /dev/null
+++ b/src/Search/CharSource.php
@@ -0,0 +1,33 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class CharSource
+{
+    private string $s;
+    private int $i = 0;
+    private int $len;
+
+    public function __construct(string $s)
+    {
+        $this->s = $s;
+        $this->len = mb_strlen($s);
+    }
+
+    public function getNext(): ?string
+    {
+        if ($this->i >= $this->len)
+            return null;
+
+        $c = mb_substr($this->s, $this->i, 1);
+        $this->i++;
+        return $c;
+    }
+
+    public function unget(): void
+    {
+        $this->i = max(0, $this->i - 1);
+    }
+}
\ No newline at end of file
diff --git a/src/Search/FTSExpr.php b/src/Search/FTSExpr.php
new file mode 100644
index 0000000..1123cf3
--- /dev/null
+++ b/src/Search/FTSExpr.php
@@ -0,0 +1,30 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class FTSExpr extends AbstractFTSExpr
+{
+    private string $term;
+
+    public function __construct(string $term)
+    {
+        $this->term = $term;
+    }
+
+    public function getTerm(): string
+    {
+        return $this->term;
+    }
+
+    protected function fts4Query(): string
+    {
+        return '"' . str_replace('"', '""', $this->term) . '"';
+    }
+
+    public function toString(): string
+    {
+        return '"' . preg_replace_callback('/(["\\\\])/', fn($s) => "\\$s", $this->term) . '"';
+    }
+}
\ No newline at end of file
diff --git a/src/Search/FTSLogicOp.php b/src/Search/FTSLogicOp.php
new file mode 100644
index 0000000..452f63b
--- /dev/null
+++ b/src/Search/FTSLogicOp.php
@@ -0,0 +1,46 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class FTSLogicOp extends AbstractFTSExpr
+{
+    private string $op;
+    private AbstractFTSExpr $a;
+    private AbstractFTSExpr $b;
+
+    /**
+     * FTSLogicOp constructor.
+     * @param string $op
+     * @param AbstractFTSExpr $a
+     * @param AbstractFTSExpr $b
+     */
+    public function __construct(string $op, AbstractFTSExpr $a, AbstractFTSExpr $b)
+    {
+        if (!LogicOp::checkOp($op))
+            throw new \DomainException("{$op} is not a valid operator");
+
+        $this->op = $op;
+        $this->a = $a;
+        $this->b = $b;
+    }
+
+    private const FTSOPS = [
+        LogicOp::OP_AND => "",
+        LogicOp::OP_OR => "OR",
+    ];
+
+    protected function fts4Query(): string
+    {
+        $ftsop = self::FTSOPS[$this->op];
+        assert($ftsop);
+
+        return "({$this->a->fts4Query()} {$ftsop} {$this->b->fts4Query()})";
+    }
+
+    public function toString(): string
+    {
+        return "({$this->a->toString()} FTS-{$this->op} {$this->b->toString()})";
+    }
+}
\ No newline at end of file
diff --git a/src/Search/FTSNotExpr.php b/src/Search/FTSNotExpr.php
new file mode 100644
index 0000000..a4aa219
--- /dev/null
+++ b/src/Search/FTSNotExpr.php
@@ -0,0 +1,29 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class FTSNotExpr extends AbstractFTSExpr
+{
+    private AbstractFTSExpr $expr;
+
+    /**
+     * FTSNotExpr constructor.
+     * @param AbstractFTSExpr $expr
+     */
+    public function __construct(AbstractFTSExpr $expr)
+    {
+        $this->expr = $expr;
+    }
+
+    protected function fts4Query(): string
+    {
+        return "-{$this->expr->fts4Query()}";
+    }
+
+    public function toString(): string
+    {
+        return "(FTS-NOT {$this->expr->toString()})";
+    }
+}
\ No newline at end of file
diff --git a/src/Search/LogicOp.php b/src/Search/LogicOp.php
new file mode 100644
index 0000000..85fb8fa
--- /dev/null
+++ b/src/Search/LogicOp.php
@@ -0,0 +1,78 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class LogicOp implements SearchExpr
+{
+    public const OP_AND = "and";
+    public const OP_OR = "or";
+
+    private const SQLOPS = [
+        self::OP_AND => "AND",
+        self::OP_OR => "OR",
+    ];
+
+    private string $op;
+    private SearchExpr $a;
+    private SearchExpr $b;
+
+    public function __construct(string $op, SearchExpr $a, SearchExpr $b)
+    {
+        if (!self::checkOp($op))
+            throw new \DomainException("{$op} is not a valid operator");
+
+        $this->op = $op;
+        $this->a = $a;
+        $this->b = $b;
+    }
+
+    public static function build(string $op, SearchExpr $a, SearchExpr $b): SearchExpr
+    {
+        return $a instanceof AbstractFTSExpr && $b instanceof AbstractFTSExpr
+            ? new FTSLogicOp($op, $a, $b)
+            : new self($op, $a, $b);
+    }
+
+    /**
+     * @param string $op
+     * @return bool
+     */
+    public static function checkOp(string $op): bool
+    {
+        return in_array($op, [
+            self::OP_AND,
+            self::OP_OR,
+        ]);
+    }
+
+    public function getA(): SearchExpr { return $this->a; }
+    public function getB(): SearchExpr { return $this->b; }
+    public function getOp(): string { return $this->op; }
+
+    public function toString(): string
+    {
+        return "({$this->a->toString()}) {$this->op} ({$this->b->toString()})";
+    }
+
+    public function toSQL($bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlex = new SQLSearchExpr();
+
+        $a = $this->a->toSQL("a_$bindPrefix", $singleFTS);
+        $b = $this->b->toSQL("b_$bindPrefix", $singleFTS);
+        $sqlop = self::SQLOPS[$this->op];
+        assert($sqlop);
+
+        $sqlex->sql = "(({$a->sql}) {$sqlop} ({$b->sql}))";
+        $sqlex->bindings = array_merge($a->bindings, $b->bindings);
+
+        return $sqlex;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return $this->a->countFTSQueries() + $this->b->countFTSQueries();
+    }
+}
\ No newline at end of file
diff --git a/src/Search/NotOp.php b/src/Search/NotOp.php
new file mode 100644
index 0000000..35fcf1e
--- /dev/null
+++ b/src/Search/NotOp.php
@@ -0,0 +1,32 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class NotOp implements SearchExpr
+{
+    private SearchExpr $expr;
+
+    public function __construct(SearchExpr $expr)
+    {
+        $this->expr = $expr;
+    }
+
+    public function toString(): string
+    {
+        return "not ({$this->expr->toString()})";
+    }
+
+    public function toSQL(string $bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlex = $this->expr->toSQL($bindPrefix, $singleFTS);
+        $sqlex->sql = "(NOT ({$sqlex->sql}))";
+        return $sqlex;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return $this->expr->countFTSQueries();
+    }
+}
\ No newline at end of file
diff --git a/src/Search/Pagination.php b/src/Search/Pagination.php
new file mode 100644
index 0000000..b4b2447
--- /dev/null
+++ b/src/Search/Pagination.php
@@ -0,0 +1,14 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class Pagination
+{
+    public const DEFAULT_PER_PAGE = 25;
+
+    private int $page = 1;
+
+
+}
\ No newline at end of file
diff --git a/src/Search/ParseError.php b/src/Search/ParseError.php
new file mode 100644
index 0000000..1b987d7
--- /dev/null
+++ b/src/Search/ParseError.php
@@ -0,0 +1,9 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+use Exception;
+
+class ParseError extends Exception { }
\ No newline at end of file
diff --git a/src/Search/Parser.php b/src/Search/Parser.php
new file mode 100644
index 0000000..a8efdfd
--- /dev/null
+++ b/src/Search/Parser.php
@@ -0,0 +1,295 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+use Generator;
+use Iterator;
+
+class Parser
+{
+    public const TOK_PAROPEN = "(";
+    public const TOK_PARCLOSE = ")";
+    public const TOK_TAG = "#";
+    public const TOK_WORD = '"';
+    public const TOK_OP = "op";
+    public const TOK_PROP = ":";
+
+    private static function iterChars(string $input): Iterator
+    {
+        for ($i = 0; $i < mb_strlen($input); $i++)
+            yield mb_substr($input, $i, 1);
+    }
+
+    /**
+     * @param string $input
+     * @return Iterator
+     * @throws ParseError
+     */
+    public static function tokenize(string $input): Iterator
+    {
+        $chars = new CharSource($input);
+        yield from self::tokenize_normal($chars);
+    }
+
+    private static function getItemAndAdvance(Iterator $input)
+    {
+        if (!$input->valid())
+            return null;
+        $out = $input->current();
+        $input->next();
+        return $out;
+    }
+
+    /**
+     * @return Iterator
+     * @throws ParseError
+     */
+    private static function tokenize_normal(CharSource $input): Iterator
+    {
+        $buf = "";
+
+        $yieldBufAndClear = function () use (&$buf) {
+            if ($buf !== "") {
+                switch ($buf) {
+                    case "and":
+                    case "or":
+                    case "not":
+                        yield [self::TOK_OP, $buf];
+                        break;
+                    default:
+                        yield [self::TOK_WORD, $buf];
+                }
+            }
+            $buf = "";
+        };
+
+        for (;;) {
+            $c = $input->getNext();
+            if ($c === null) {
+                break;
+            }
+
+            switch ($c) {
+                case '\\':
+                    $next = $input->getNext();
+                    if ($next === null) {
+                        $buf .= $c;
+                        break 2;
+                    }
+                    $buf .= $next;
+                    break;
+
+                case ' ':
+                case "\t":
+                    yield from $yieldBufAndClear();
+                    break;
+
+                case '"':
+                    yield from $yieldBufAndClear();
+                    yield from self::tokenize_string($input);
+                    break;
+
+                case ':':
+                    if ($buf !== "") {
+                        yield [self::TOK_PROP, $buf];
+                        $buf = "";
+                    }
+                    break;
+
+                case '(':
+                    yield from $yieldBufAndClear();
+                    yield [self::TOK_PAROPEN, null];
+                    break;
+
+                case ')':
+                    yield from $yieldBufAndClear();
+                    yield [self::TOK_PARCLOSE, null];
+                    break;
+
+                case '#':
+                    yield from $yieldBufAndClear();
+                    yield from self::tokenize_tag($input);
+                    break;
+
+                default:
+                    $buf .= $c;
+            }
+        }
+
+        yield from $yieldBufAndClear();
+        return;
+    }
+
+    /**
+     * @param string $input
+     * @return SearchExpr|null
+     * @throws ParseError
+     */
+    public static function parse(string $input): ?SearchExpr
+    {
+        $tokens = self::tokenize($input);
+
+        $stack = [];
+        $cur = null;
+        $binOp = null;
+        $negated = false;
+
+        $putExpr = function (SearchExpr $expr) use (&$cur, &$binOp, &$negated) {
+            if ($negated) {
+                $expr = new NotOp($expr);
+            }
+
+            $cur = $cur === null
+                ? $expr
+                : LogicOp::build($binOp ?? LogicOp::OP_AND, $cur, $expr);
+
+            $binOp = null;
+            $negated = false;
+        };
+
+        $setBinOp = function ($op) use (&$binOp) {
+            if ($binOp !== null)
+                throw new ParseError("Unexpected logic operator $op");
+
+            $binOp = $op;
+        };
+
+        for (;;) {
+            $token = self::getItemAndAdvance($tokens);
+            if ($token === null)
+                break;
+
+            [$ttyp, $tdata] = $token;
+
+            switch ($ttyp) {
+
+                case self::TOK_TAG:
+                    $putExpr(new TagExpr($tdata));
+                    break;
+                case self::TOK_OP:
+                    switch ($tdata) {
+                        case "and":
+                            $setBinOp(LogicOp::OP_AND);
+                            break;
+                        case "or":
+                            $setBinOp(LogicOp::OP_OR);
+                            break;
+                        case "not":
+                            $negated = !$negated;
+                            break;
+                        default:
+                            throw new \DomainException("Unexpected data for TOK_OP: $tdata");
+                    }
+                    break;
+                case self::TOK_WORD:
+                    $putExpr(new FTSExpr($tdata));
+                    break;
+                case self::TOK_PROP:
+                    // TODO(laria): Implement this
+                    throw new ParseError("Not yet supported");
+                case self::TOK_PAROPEN:
+                    $stack[] = [$cur, $binOp, $negated];
+                    $cur = $binOp = $negated = null;
+                    break;
+                case self::TOK_PARCLOSE:
+                    if (empty($stack))
+                        throw new ParseError("Unexpected closing parenthesis");
+
+                    $parContent = $cur;
+                    [$cur, $binOp, $negated] = array_pop($stack);
+                    $putExpr($parContent);
+                    break;
+            }
+        }
+
+        if (!empty($stack))
+            throw new ParseError("Unclosed parenthesis");
+
+        return $cur;
+    }
+
+    /**
+     * @param CharSource $input
+     * @return Generator
+     * @throws ParseError
+     */
+    private static function tokenize_string(CharSource $input): Generator
+    {
+        $content = "";
+        for (;;) {
+            $c = $input->getNext();
+            if ($c === null)
+                throw new ParseError("Unclosed string encountered");
+
+            switch ($c) {
+                case '\\':
+                    $next = $input->getNext();
+                    if ($next === null)
+                        throw new ParseError("Unclosed string encountered");
+
+                    $content .= $next;
+                    break;
+
+                case '"':
+                    yield [self::TOK_WORD, $content];
+                    return;
+
+                default:
+                    $content .= $c;
+            }
+        }
+    }
+
+    /**
+     * @param CharSource $input
+     * @return Iterator
+     */
+    private static function tokenize_tag(CharSource $input): Iterator
+    {
+        $tag = "";
+
+        $yieldTag = function () use (&$tag) {
+            if ($tag === "")
+                yield [self::TOK_WORD, "#"];
+            else
+                yield [self::TOK_TAG, $tag];
+        };
+
+        for (;;) {
+            $c = $input->getNext();
+            if ($c === null) {
+                yield from $yieldTag();
+                return;
+            }
+
+            switch ($c) {
+                case '\\':
+                    $next = $input->getNext();
+                    if ($c === null) {
+                        $tag .= '\\';
+                        yield [self::TOK_TAG, $tag];
+                        return;
+                    }
+                    $tag .= $next;
+                    break;
+
+                case ' ':
+                case "\t":
+                    yield from $yieldTag();
+                    return;
+
+                case '(':
+                case ')':
+                case '#':
+                    $input->unget();
+                    yield from $yieldTag();
+                    return;
+
+                default:
+                    $tag .= $c;
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Search/SQLSearchExpr.php b/src/Search/SQLSearchExpr.php
new file mode 100644
index 0000000..76306ce
--- /dev/null
+++ b/src/Search/SQLSearchExpr.php
@@ -0,0 +1,11 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class SQLSearchExpr
+{
+    public string $sql;
+    public array $bindings = [];
+}
\ No newline at end of file
diff --git a/src/Search/SearchExpr.php b/src/Search/SearchExpr.php
new file mode 100644
index 0000000..fbf2a40
--- /dev/null
+++ b/src/Search/SearchExpr.php
@@ -0,0 +1,14 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+interface SearchExpr
+{
+    public function toString(): string;
+
+    public function toSQL(string $bindPrefix, bool $singleFTS): SQLSearchExpr;
+
+    public function countFTSQueries(): int;
+}
\ No newline at end of file
diff --git a/src/Search/SearchResult.php b/src/Search/SearchResult.php
new file mode 100644
index 0000000..1abbb86
--- /dev/null
+++ b/src/Search/SearchResult.php
@@ -0,0 +1,160 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+use LogicException;
+use Micropoly\DbQuery;
+use Micropoly\Esc;
+use Micropoly\Models\Note;
+use SQLite3;
+
+class SearchResult
+{
+    private Note $note;
+    private array $highlights = [];
+
+    private function __construct(Note $note, array $highlights)
+    {
+        $this->note = $note;
+        $this->highlights = $highlights;
+    }
+
+    /**
+     * @param SQLite3 $db
+     * @param SearchExpr $expr
+     * @return self[]
+     */
+    public static function search(SQLite3 $db, SearchExpr $expr): array
+    {
+        return $expr->countFTSQueries() === 1
+            ? self::searchFTS($db, $expr)
+            : self::searchComplex($db, $expr);
+    }
+
+    private static function searchComplex(SQLite3 $db, SearchExpr $expr): array
+    {
+        $sqlSearchExpr = $expr->toSQL("", false);
+
+        $query = new DbQuery("
+            SELECT
+                n.id
+            FROM notes n
+            INNER JOIN note_contents nc
+                ON nc.rowid = n.content_row
+            WHERE {$sqlSearchExpr->sql}
+        ");
+
+        foreach ($sqlSearchExpr->bindings as $k => $v)
+            $query->bind($k, $v);
+
+        $ids = array_map(fn ($row) => $row[0], $query->fetchRows($db));
+        $notes = Note::byIds($db, $ids);
+        return array_map(fn ($note) => new self($note, []), $notes);
+    }
+
+    private static function highlightRangeContains(array $range, int $point): bool
+    {
+        [$start, $end] = $range;
+        return $start <= $point && $point <= $end;
+    }
+
+    private static function areHighlightsOverlapping(array $a, array $b): bool
+    {
+        [$aStart, $aEnd] = $a;
+        [$bStart, $bEnd] = $b;
+
+        return self::highlightRangeContains($a, $bStart)
+            || self::highlightRangeContains($a, $bEnd)
+            || self::highlightRangeContains($b, $aStart)
+            || self::highlightRangeContains($b, $aEnd);
+    }
+
+    private static function parseOffsetsToHighlights(string $offsets): array
+    {
+        $offsets = explode(" ", $offsets);
+        $offsets = array_map("intval", $offsets);
+
+        $phraseMatches = count($offsets) / 4;
+
+        $highlights = [];
+        for ($i = 0; $i < $phraseMatches; $i++) {
+            $off = $offsets[$i * 4 + 2];
+            $len = $offsets[$i * 4 + 3];
+
+            if ($off < 0 || $len === 0)
+                continue;
+
+            $highlights[] = [$off, $off+$len-1];
+        }
+
+        usort($highlights, fn ($a, $b) => ($a[0] <=> $b[0]) ?: ($b[1] <=> $a[1]));
+
+        // merge overlapping areas
+        for ($i = count($highlights)-1; $i >= 0; $i--) {
+            for ($j = $i-1; $j >= 0; $j--) {
+                if (self::areHighlightsOverlapping($highlights[$i], $highlights[$j])) {
+                    [$iStart, $iEnd] = $highlights[$i];
+                    [$jStart, $jEnd] = $highlights[$j];
+
+                    $highlights[$j] = [min($iStart, $jStart), max($iEnd, $jEnd)];
+                    unset($highlights[$i]);
+                    break;
+                }
+            }
+        }
+
+        return array_merge($highlights); // array_merge here renumbers the keys
+    }
+
+    private static function searchFTS(SQLite3 $db, SearchExpr $expr)
+    {
+        $sqlSearchExpr = $expr->toSQL("", true);
+        $query = new DbQuery("
+            SELECT
+                n.id,
+                offsets(nc.note_contents) AS offsets
+            FROM notes n
+            INNER JOIN note_contents nc
+                ON nc.rowid = n.content_row
+            WHERE {$sqlSearchExpr->sql}
+        ");
+        foreach ($sqlSearchExpr->bindings as $k => $v)
+            $query->bind($k, $v);
+
+
+        $offsets = $query->fetchIndexedValues($db, "offsets", "id");
+
+        $notes = Note::byIds($db, array_keys($offsets));
+
+        $out = [];
+        foreach ($offsets as $id => $offString) {
+            if (!isset($notes[$id]))
+                throw new LogicException("Note '{$id}' not loaded but found?");
+
+            $out[] = new self($notes[$id], self::parseOffsetsToHighlights($offString));
+        }
+
+        return $out;
+    }
+
+    public function renderHighlightedContent(): string
+    {
+        $out = "";
+        $content = $this->note->getContent();
+        $lastOff = 0;
+        foreach ($this->highlights as [$start, $end]) {
+            $out .= Esc::e(substr($content, $lastOff, $start - $lastOff), Esc::HTML_WITH_BR);
+            $out .= '<b>' . Esc::e(substr($content, $start, $end - $start + 1), Esc::HTML_WITH_BR) . '</b>';
+
+            $lastOff = $end + 1;
+        }
+
+        $out .= Esc::e(substr($content, $lastOff), Esc::HTML_WITH_BR);
+
+        return $out;
+    }
+
+    public function getNote(): Note { return $this->note; }
+}
\ No newline at end of file
diff --git a/src/Search/TagExpr.php b/src/Search/TagExpr.php
new file mode 100644
index 0000000..b117bbe
--- /dev/null
+++ b/src/Search/TagExpr.php
@@ -0,0 +1,42 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class TagExpr implements SearchExpr
+{
+    private string $tag;
+
+    public function __construct(string $tag)
+    {
+        $this->tag = $tag;
+    }
+
+    public function getTag(): string { return $this->tag; }
+
+    public function toString(): string
+    {
+        return "#{$this->tag}";
+    }
+
+    public function toSQL(string $bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlex = new SQLSearchExpr();
+
+        $sqlex->sql = "EXISTS (
+            SELECT 1
+            FROM tags t
+            WHERE t.tag = :{$bindPrefix}tag
+                AND t.note_id = n.id
+        )";
+        $sqlex->bindings["{$bindPrefix}tag"] = $this->tag;
+
+        return $sqlex;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return 0;
+    }
+}
\ No newline at end of file
diff --git a/src/Search/TrueExpr.php b/src/Search/TrueExpr.php
new file mode 100644
index 0000000..5f25c7e
--- /dev/null
+++ b/src/Search/TrueExpr.php
@@ -0,0 +1,25 @@
+<?php
+
+
+namespace Micropoly\Search;
+
+
+class TrueExpr implements SearchExpr
+{
+    public function toString(): string
+    {
+        return "<TrueExpr>";
+    }
+
+    public function toSQL(string $bindPrefix, bool $singleFTS): SQLSearchExpr
+    {
+        $sqlSearchExpr = new SQLSearchExpr();
+        $sqlSearchExpr->sql = "1";
+        return $sqlSearchExpr;
+    }
+
+    public function countFTSQueries(): int
+    {
+        return 0;
+    }
+}
\ No newline at end of file
diff --git a/src/Tools/PopulateDevDb.php b/src/Tools/PopulateDevDb.php
new file mode 100644
index 0000000..8f1b2b9
--- /dev/null
+++ b/src/Tools/PopulateDevDb.php
@@ -0,0 +1,71 @@
+<?php
+
+
+namespace Micropoly\Tools;
+
+
+use Micropoly\Entrypoint;
+use Micropoly\Env;
+use Micropoly\Models\Note;
+use SQLite3;
+
+class PopulateDevDb implements Entrypoint
+{
+    private const NUM_NOTES = 1000;
+    private const WORDS_FILE = "/usr/share/dict/cracklib-small";
+    private const TAGS_MIN_RAND = 0;
+    private const TAGS_MAX_RAND = 6;
+    private const CHANCE_TRASH = 0.1;
+    private const CHANCE_INBOX = 0.4;
+    private const CONTENT_MIN_WORDS = 3;
+    private const CONTENT_MAX_WORDS = 200;
+
+    private array $words = [];
+
+    private function readWords()
+    {
+        $words = file_get_contents(self::WORDS_FILE);
+        $words = explode("\n", $words);
+        $words = array_map("trim", $words);
+        $words = array_filter($words);
+
+        $this->words = $words;
+    }
+
+    public function run(Env $env)
+    {
+        $this->readWords();
+
+        $db = $env->db();
+        for ($i = 0; $i < self::NUM_NOTES; $i++)
+            $this->createTestNote($db);
+    }
+
+    private function randomWords(int $min, int $max): array
+    {
+        $words = [];
+        $num = mt_rand($min, $max);
+        for ($i = 0; $i < $num; $i++)
+            $words[] = $this->words[mt_rand(0, count($this->words)-1)];
+
+        return $words;
+    }
+
+    private static function byChance(float $chance): bool
+    {
+        return mt_rand() / mt_getrandmax() <= $chance;
+    }
+
+    private function createTestNote(SQLite3 $db): void
+    {
+        $note = new Note();
+        $tags = $this->randomWords(self::TAGS_MIN_RAND, self::TAGS_MAX_RAND);
+        if (self::byChance(self::CHANCE_INBOX))
+            $tags[] = "inbox";
+        $note->setTags($tags);
+        $note->setContent(implode(" ", $this->randomWords(self::CONTENT_MIN_WORDS, self::CONTENT_MAX_WORDS)));
+        $note->setTrash(self::byChance(self::CHANCE_TRASH));
+
+        $note->save($db);
+    }
+}
\ No newline at end of file
diff --git a/templates/index.twig b/templates/index.twig
new file mode 100644
index 0000000..7f905ee
--- /dev/null
+++ b/templates/index.twig
@@ -0,0 +1,13 @@
+{% extends "skeleton.twig" %}
+{% import "macros.twig" as macros %}
+
+{% block body %}
+    {% if tagcloud %}
+    <section class="tagcloud-outer">
+        <h2>Tagcloud</h2>
+        {{ macros.tagcloud(tagcloud) }}
+    </section>
+    {% endif %}
+
+    {{ macros.new_note() }}
+{% endblock %}
diff --git a/templates/macros.twig b/templates/macros.twig
new file mode 100644
index 0000000..dc7e721
--- /dev/null
+++ b/templates/macros.twig
@@ -0,0 +1,50 @@
+{% macro taglink(tag) %}
+    <a href="{{ url("search") ~ "?q=" ~ ("#" ~ (tag|search_escape))|e("url") }}">{{ tag }}</a>
+{% endmacro %}
+
+{% macro tagcloud(tagcloud) %}
+    <ul class="tagcloud">{% for tag, magnitude in tagcloud %}
+        <li class="tag tc-{{ magnitude }}">{{ _self.taglink(tag) }}</li>
+    {%  endfor %}</ul>
+{% endmacro %}
+
+{% macro searchbox(query="") %}
+    <form action="{{ url("search") }}" class="search-form">
+        <input
+                type="text"
+                name="q"
+                placeholder="foo bar, #tag1 #tag2, &quot;full text&quot; and (#tag1 or #tag2), ..."
+                value="{{ query }}"
+                class="search-input"
+        />
+        <button type="submit" class="search-btn">Search</button>
+    </form>
+{% endmacro %}
+
+{% macro note_form_content(note) %}
+    <div class="labelled">
+        <label for="note-content">Content</label>
+        <div class="labelled-content">
+            <textarea id="note-content" name="content">{{ note.content }}</textarea>
+        </div>
+    </div>
+    <fieldset class="tags">
+        <legend>Tags</legend>
+        {% for tag in note.tags %}
+            <input type="text" name="tag[]" value="{{ tag }}" />
+        {% endfor %}
+        {% for i in 0..10 %}
+            <input type="text" name="tag[]" />
+        {% endfor %}
+    </fieldset>
+{% endmacro %}
+
+{% macro new_note() %}
+    <section class="new-note">
+        <h2>New Note</h2>
+        <form action="{{ url("new-note") }}" method="post">
+            {{ _self.note_form_content({}) }}
+            <button type="submit">Create</button>
+        </form>
+    </section>
+{% endmacro %}
\ No newline at end of file
diff --git a/templates/new_note.twig b/templates/new_note.twig
new file mode 100644
index 0000000..df9a320
--- /dev/null
+++ b/templates/new_note.twig
@@ -0,0 +1,5 @@
+{% extends "skeleton.twig" %}
+{% import "macros.twig" as macros %}
+{% block body %}
+    {{ macros.new_note() }}
+{%  endblock %}
\ No newline at end of file
diff --git a/templates/note.twig b/templates/note.twig
new file mode 100644
index 0000000..14989aa
--- /dev/null
+++ b/templates/note.twig
@@ -0,0 +1,15 @@
+{% extends "skeleton.twig" %}
+{% import "macros.twig" as macros %}
+{% block body %}
+    <form action="{{ url("n/%s", note.id) }}" method="post">
+        {{ macros.note_form_content(note) }}
+        <button type="submit">Save</button>
+        <button
+                type="submit"
+                name="delete"
+                value="delete"
+                class="confirm"
+                data-question="Do you really want to delete the note?"
+        >Delete</button>
+    </form>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/search.twig b/templates/search.twig
new file mode 100644
index 0000000..be8ce54
--- /dev/null
+++ b/templates/search.twig
@@ -0,0 +1,23 @@
+{% extends "skeleton.twig" %}
+{% import "macros.twig" as macros %}
+
+{% block body %}
+    {% if error %}
+        <div class="error">{{ error }}</div>
+    {% else %}
+        <ul class="search-result note-list">
+        {% for result in results %}
+            <li>
+                <a href="{{ url("n/%s", result.note.id) }}">[e]</a>
+                <div class="content">{{ result.renderHighlightedContent()|raw }}</div>
+                <ul class="tags">
+                    {% for tag in result.note.tags %}
+                        <li class="tag">{{ macros.taglink(tag) }}</li>
+                    {% endfor %}
+                </ul>
+            </li>
+        {% endfor %}
+        </ul>
+    {% endif %}
+
+{% endblock %}
diff --git a/templates/skeleton.twig b/templates/skeleton.twig
new file mode 100644
index 0000000..e91223f
--- /dev/null
+++ b/templates/skeleton.twig
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+{% import "macros.twig" as macros %}
+<html lang="en">
+<head>
+{% block head %}
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+
+    <link type="text/css" rel="stylesheet" href="{{ url("assets/styles.css") }}">
+
+    <script src="{{ url("vendor/components/jquery/jquery.min.js") }}"></script>
+    <script src="{{ url("assets/interactive.js") }}"></script>
+    <title>{% block title %}micropoly{% endblock %}</title>
+{% endblock %}
+</head>
+<body>
+    {% block header %}
+        <header>
+            <nav class="mainmenu">
+                <ul>
+                    <li><a href="{{ url("") }}" class="homelink">micropoly</a> </li>
+                    <li><a href="{{ url("new-note") }}">Add note</a></li>
+                </ul>
+            </nav>
+            <section class="s-search">
+                {{ macros.searchbox(query) }}
+            </section>
+        </header>
+    {% endblock %}
+    {% block body %}
+    {% endblock %}
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/Search/ParserTest.php b/tests/Search/ParserTest.php
new file mode 100644
index 0000000..9a6aeef
--- /dev/null
+++ b/tests/Search/ParserTest.php
@@ -0,0 +1,120 @@
+<?php
+
+namespace Micropoly\Search;
+
+use PHPUnit\Framework\TestCase;
+
+class ParserTest extends TestCase
+{
+
+    /**
+     * @covers \Micropoly\Search\Parser::tokenize
+     * @dataProvider tokenizeDataProvider
+     */
+    public function testTokenize($input, $want)
+    {
+        $have = [];
+        foreach (Parser::tokenize($input) as $tok)
+            $have[] = $tok;
+
+        $this->assertSame($want, $have);
+    }
+
+    public function tokenizeDataProvider()
+    {
+        return [
+            ["", []],
+            ["hello", [
+                [Parser::TOK_WORD, "hello"],
+            ]],
+            ["hello world", [
+                [Parser::TOK_WORD, "hello"],
+                [Parser::TOK_WORD, "world"],
+            ]],
+            ['"hello world"', [
+                [Parser::TOK_WORD, "hello world"],
+            ]],
+            ['"hello\\"quote\\\\"', [
+                [Parser::TOK_WORD , 'hello"quote\\'],
+            ]],
+            ["foo\\ bar", [
+                [Parser::TOK_WORD, "foo bar"],
+            ]],
+            ['foo\\\\bar\\"baz', [
+                [Parser::TOK_WORD, 'foo\\bar"baz'],
+            ]],
+            ['foo\\', [
+                [Parser::TOK_WORD, 'foo\\'],
+            ]],
+            ["#foo #bar", [
+                [Parser::TOK_TAG, "foo"],
+                [Parser::TOK_TAG, "bar"],
+            ]],
+            ["#foo\\ bar", [
+                [Parser::TOK_TAG, "foo bar"],
+            ]],
+            ["and or not ()( )", [
+                [Parser::TOK_OP, "and"],
+                [Parser::TOK_OP, "or"],
+                [Parser::TOK_OP, "not"],
+                [Parser::TOK_PAROPEN, null],
+                [Parser::TOK_PARCLOSE, null],
+                [Parser::TOK_PAROPEN, null],
+                [Parser::TOK_PARCLOSE, null],
+            ]],
+            ["(#foo)", [
+                [Parser::TOK_PAROPEN, null],
+                [Parser::TOK_TAG, "foo"],
+                [Parser::TOK_PARCLOSE, null],
+            ]],
+            ["foo:bar", [
+                [Parser::TOK_PROP, "foo"],
+                [Parser::TOK_WORD, "bar"],
+            ]],
+        ];
+    }
+
+    public function testTokenizeFailUnclosedString()
+    {
+        $this->expectException(ParseError::class);
+        foreach (Parser::tokenize('foo "bar') as $_);
+    }
+
+    /**
+     * @param string $input
+     * @param bool|null|SearchExpr $exprOrFalseForErr
+     * @dataProvider parseDataProvider
+     */
+    public function testParse(string $input, $exprOrFalseForErr)
+    {
+        if ($exprOrFalseForErr === false)
+            $this->expectException(ParseError::class);
+
+        $have = Parser::parse($input);
+        if ($have !== null)
+            $have = $have->toString();
+
+        $want = $exprOrFalseForErr === null ? null : $exprOrFalseForErr->toString();
+
+        $this->assertSame($want, $have);
+    }
+
+    public function parseDataProvider()
+    {
+        return [
+            ["", null],
+            ["(", false],
+            [")", false],
+            ["foo", new FTSExpr("foo")],
+            ["foo #bar", new LogicOp(LogicOp::OP_AND, new FTSExpr("foo"), new TagExpr("bar"))],
+            ["(foo and #bar) or not baz", new LogicOp(
+                LogicOp::OP_OR, new LogicOp(
+                LogicOp::OP_AND,
+                new FTSExpr("foo"),
+                new TagExpr("bar")
+            ), new NotOp(new FTSExpr("baz"))
+            )],
+            ["foo bar", new FTSLogicOp(LogicOp::OP_AND, new FTSExpr("foo"), new FTSExpr("bar"))],
+        ];
+    }
+}
-- 
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