SEO: OG por post, RSS feed, sitemap, FTS5 busqueda, View Transitions, Cloudflare Polish

src/lib/db.ts

@@ -43,8 +43,44 @@ function migrate(db: Database.Database) {
     CREATE INDEX IF NOT EXISTS idx_posts_slug ON posts(slug);
     CREATE INDEX IF NOT EXISTS idx_posts_published ON posts(published);
     CREATE INDEX IF NOT EXISTS idx_posts_created ON posts(created_at DESC);
+
+    -- FTS5: búsqueda full-text sobre título/título_jpn/artista/parodia/tags.
+    -- Tabla externa (content=posts) para que se sincronice con los triggers.
+    CREATE VIRTUAL TABLE IF NOT EXISTS posts_fts USING fts5(
+      title, title_jpn, artist, parody, tags,
+      content='posts',
+      content_rowid='id',
+      tokenize='unicode61'
+    );
   `)
 
+  // Triggers de sincronización FTS (solo si no existen).
+  db.exec(`
+    CREATE TRIGGER IF NOT EXISTS posts_ai AFTER INSERT ON posts BEGIN
+      INSERT INTO posts_fts(rowid, title, title_jpn, artist, parody, tags)
+      VALUES (new.id, new.title, new.title_jpn, new.artist, new.parody, new.tags);
+    END;
+    CREATE TRIGGER IF NOT EXISTS posts_ad AFTER DELETE ON posts BEGIN
+      INSERT INTO posts_fts(posts_fts, rowid, title, title_jpn, artist, parody, tags)
+      VALUES ('delete', old.id, old.title, old.title_jpn, old.artist, old.parody, old.tags);
+    END;
+    CREATE TRIGGER IF NOT EXISTS posts_au AFTER UPDATE ON posts BEGIN
+      INSERT INTO posts_fts(posts_fts, rowid, title, title_jpn, artist, parody, tags)
+      VALUES ('delete', old.id, old.title, old.title_jpn, old.artist, old.parody, old.tags);
+      INSERT INTO posts_fts(rowid, title, title_jpn, artist, parody, tags)
+      VALUES (new.id, new.title, new.title_jpn, new.artist, new.parody, new.tags);
+    END;
+  `)
+
+  // Reindexar FTS si la tabla externa quedó desincronizada (posts sin indexar).
+  try {
+    const ftsCount = db.prepare("SELECT COUNT(*) as c FROM posts_fts").get() as { c: number }
+    const postCount = db.prepare("SELECT COUNT(*) as c FROM posts").get() as { c: number }
+    if (ftsCount.c < postCount.c) {
+      db.exec("INSERT INTO posts_fts(posts_fts) VALUES('rebuild')")
+    }
+  } catch {}
+
   try {
     db.exec("ALTER TABLE posts ADD COLUMN url TEXT")
   } catch {}
@@ -214,22 +250,32 @@ export function getPostCount(): number {
   return row.count
 }
 
-// Búsqueda pública por título/título_jpn/artista/tags (LIKE sobre JSON).
+// Búsqueda pública por título/título_jpn/artista/tags (FTS5 full-text).
+// Devuelve los posts MATCH (por relevancia), filtrando publicados.
 export function searchPosts(query: string, publishedOnly = true): Post[] {
   const d = getDb()
-  const q = `%${query}%`
-  const where = publishedOnly ? "published = 1 AND" : ""
+  const q = query.trim()
+  if (!q) return []
+
+  // Escapar comillas para FTS5 y construir una búsqueda por prefijo en cada token.
+  const escaped = q.replace(/"/g, "").trim()
+  if (!escaped) return []
+
+  const ftsQuery = escaped
+    .split(/\s+/)
+    .filter(Boolean)
+    .map((tok) => `"${tok}"*`)
+    .join(" AND ")
+
+  const where = publishedOnly ? "AND p.published = 1" : ""
   const rows = d
     .prepare(
-      `SELECT * FROM posts WHERE ${where} (
-        title LIKE @q OR
-        title_jpn LIKE @q OR
-        artist LIKE @q OR
-        parody LIKE @q OR
-        tags LIKE @q
-      ) ORDER BY published_at DESC LIMIT 100`,
+      `SELECT p.* FROM posts p
+       JOIN posts_fts f ON f.rowid = p.id
+       WHERE posts_fts MATCH @q ${where}
+       ORDER BY bm25(posts_fts) LIMIT 100`,
     )
-    .all({ q }) as Record<string, unknown>[]
+    .all({ q: ftsQuery }) as Record<string, unknown>[]
   return rows.map(rowToPost)
 }