Add assets/js/db.js

assets/js/db.js

@@ -0,0 +1,50 @@
+let db = null;
+
+export async function initDB() {
+
+    if (db) {
+        return db;
+    }
+
+    return new Promise((resolve, reject) => {
+
+        const request = indexedDB.open('woordjesDB', 1);
+
+        request.onupgradeneeded = (event) => {
+
+            const database = event.target.result;
+
+            if (!database.objectStoreNames.contains('words')) {
+                database.createObjectStore('words', {
+                    keyPath: 'key'
+                });
+            }
+
+            if (!database.objectStoreNames.contains('sync_queue')) {
+                database.createObjectStore('sync_queue', {
+                    keyPath: 'id',
+                    autoIncrement: true
+                });
+            }
+
+            if (!database.objectStoreNames.contains('session')) {
+                database.createObjectStore('session', {
+                    keyPath: 'key'
+                });
+            }
+        };
+
+        request.onsuccess = (event) => {
+            db = event.target.result;
+            resolve(db);
+        };
+
+        request.onerror = () => {
+            reject(request.error);
+        };
+    });
+}
+
+export function getDB() {
+    return db;
+}