[feat] Improves IndexedDB initialization and recovery (#278)

Author: Aloento

src/Services/DB.ts

@@ -1,36 +1,55 @@
-import { openDB } from "idb";
+import { deleteDB, openDB } from "idb";
 import { Dic } from "~/Helpers/Entities";
 
+const DB_VERSION = 2;
+
 /**
  * @author Aloento
  * @since 1.0.0
- * @version 0.1.0
+ * @version 0.2.0
  */
 export class DB<T> {
   public Ins: T;
+  private dbName: string;
+  private storeName: string;
 
   constructor(factory: () => T) {
     this.Ins = factory();
+    this.dbName = Dic.Name;
+    this.storeName = Dic.Name;
   }
 
   public async init() {
-    return openDB(Dic.Name, 1, {
-      upgrade(db) {
-        db.createObjectStore(Dic.Name);
-      },
-    });
+    try {
+      return openDB(this.dbName, DB_VERSION, {
+        upgrade(db) {
+          if (db.objectStoreNames.contains(Dic.Name)) {
+            db.deleteObjectStore(Dic.Name);
+          }
+          db.createObjectStore(Dic.Name);
+        },
+      });
+    } catch (error) {
+      await deleteDB(this.dbName);
+
+      return openDB(this.dbName, DB_VERSION, {
+        upgrade(db) {
+          db.createObjectStore(Dic.Name);
+        },
+      });
+    }
   }
 
   public async save(key: string, data = this.Ins) {
     this.Ins = data;
     const db = await this.init();
-    await db.put(Dic.Name, data, key);
+    await db.put(this.storeName, data, key);
     db.close();
   }
 
   public async load(key: string) {
     const db = await this.init();
-    const res = await db.get(Dic.Name, key) as T;
+    const res = await db.get(this.storeName, key) as T;
     if (res) {
       this.Ins = res;
     }