1 files changed, 42 insertions, 0 deletions
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