purge old database versions

ext/bg/js/database.js

@@ -20,16 +20,28 @@
 class Database {
     constructor() {
         this.db = null;
+        this.dbVersion = 1;
         this.tagMetaCache = {};
     }
 
+    sanitize() {
+        const db = new Dexie('dict');
+        return db.open().then(() => {
+            db.close();
+            if (db.verno !== this.dbVersion) {
+                return db.delete();
+            }
+        }).catch(() => {});
+    }
+
     prepare() {
         if (this.db !== null) {
             return Promise.reject('database already initialized');
         }
 
+        return this.sanitize().then(() => {
             this.db = new Dexie('dict');
-        this.db.version(1).stores({
+            this.db.version(this.dbVersion).stores({
                 terms: '++id,dictionary,expression,reading',
                 kanji: '++,dictionary,character',
                 tagMeta: '++,dictionary',
@@ -37,6 +49,7 @@ class Database {
             });
 
             return this.db.open();
+        });
     }
 
     purge() {

ext/manifest.json

@@ -1,7 +1,7 @@
 {
     "manifest_version": 2,
     "name": "Yomichan",
-    "version": "1.0.0",
+    "version": "1.0.1",
 
     "description": "Japanese dictionary with Anki integration",
     "icons": {"16": "img/icon16.png", "48": "img/icon48.png", "128": "img/icon128.png"},