build 1

backend/src/db.ts

@@ -0,0 +1,49 @@
+import Database from 'better-sqlite3';
+import path from 'path';
+import fs from 'fs';
+
+const DATA_DIR = process.env.DATA_DIR ?? '/data';
+const DB_DIR = path.join(DATA_DIR, 'db');
+const DB_PATH = path.join(DB_DIR, 'memer.db');
+
+fs.mkdirSync(DB_DIR, { recursive: true });
+
+const db = new Database(DB_PATH);
+
+// Enable WAL mode for better concurrent read performance
+db.pragma('journal_mode = WAL');
+db.pragma('foreign_keys = ON');
+
+db.exec(`
+  CREATE TABLE IF NOT EXISTS memes (
+    id          TEXT PRIMARY KEY,
+    title       TEXT NOT NULL,
+    description TEXT,
+    file_path   TEXT NOT NULL,
+    file_name   TEXT NOT NULL,
+    file_size   INTEGER NOT NULL,
+    mime_type   TEXT NOT NULL,
+    width       INTEGER NOT NULL,
+    height      INTEGER NOT NULL,
+    parent_id   TEXT REFERENCES memes(id) ON DELETE CASCADE,
+    created_at  TEXT NOT NULL DEFAULT (datetime('now'))
+  );
+
+  CREATE TABLE IF NOT EXISTS tags (
+    id   INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT UNIQUE NOT NULL COLLATE NOCASE
+  );
+
+  CREATE TABLE IF NOT EXISTS meme_tags (
+    meme_id TEXT NOT NULL REFERENCES memes(id) ON DELETE CASCADE,
+    tag_id  INTEGER NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
+    PRIMARY KEY (meme_id, tag_id)
+  );
+
+  CREATE INDEX IF NOT EXISTS idx_memes_parent_id ON memes(parent_id);
+  CREATE INDEX IF NOT EXISTS idx_memes_created_at ON memes(created_at DESC);
+  CREATE INDEX IF NOT EXISTS idx_meme_tags_meme_id ON meme_tags(meme_id);
+  CREATE INDEX IF NOT EXISTS idx_meme_tags_tag_id ON meme_tags(tag_id);
+`);
+
+export default db;