chore: initial commit

internal/db/query/post_stats.sql

@@ -0,0 +1,29 @@
+-- name: IncrementPostStatsView :exec
+WITH visitor AS (
+    INSERT INTO post_viewers (
+        post_id,
+        ip,
+        last_viewed_at
+    )
+    VALUES (
+        $1,
+        $2,
+        NOW()
+    )
+    ON CONFLICT (post_id, ip)
+    DO UPDATE
+    SET last_viewed_at = NOW()
+    WHERE post_viewers.last_viewed_at < NOW() - INTERVAL '30 minutes'
+    RETURNING post_id
+)
+INSERT INTO post_stats (
+    post_id,
+    view
+)
+SELECT
+    post_id,
+    1
+FROM visitor
+ON CONFLICT (post_id)
+DO UPDATE
+SET view = post_stats.view + 1;