code organisation & refactor

src/shared/database.js

@@ -0,0 +1,48 @@
+const sqlite3 = require('sqlite3').verbose();
+const path = require('path');
+
+const DB_PATH = path.join(__dirname, '..', 'metadata', 'anilist_anime.db');
+let db = null;
+
+function initDatabase() {
+    db = new sqlite3.Database(DB_PATH, sqlite3.OPEN_READONLY, (err) => {
+        if (err) {
+            console.error("Database Error:", err.message);
+        } else {
+            console.log("Connected to local AniList database.");
+        }
+    });
+    return db;
+}
+
+function getDatabase() {
+    if (!db) {
+        throw new Error("Database not initialized. Call initDatabase() first.");
+    }
+    return db;
+}
+
+function queryOne(sql, params = []) {
+    return new Promise((resolve, reject) => {
+        getDatabase().get(sql, params, (err, row) => {
+            if (err) reject(err);
+            else resolve(row);
+        });
+    });
+}
+
+function queryAll(sql, params = []) {
+    return new Promise((resolve, reject) => {
+        getDatabase().all(sql, params, (err, rows) => {
+            if (err) reject(err);
+            else resolve(rows || []);
+        });
+    });
+}
+
+module.exports = {
+    initDatabase,
+    getDatabase,
+    queryOne,
+    queryAll
+};