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<?php
namespace Micropoly;
use RuntimeException;
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"] ?? false,
]);
$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;
});
}
public function attachmentsPath(): string
{
$attachments = $this->config['attachments'];
if (!is_dir($attachments) || !is_writable($attachments))
throw new RuntimeException("Attachment directory '$attachments' is not a writable directory.");
return $attachments;
}
}
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