remove thumbnail cache

app/state/migrations.ts

@@ -1,9 +1,26 @@
-const migrations: Array<(state: any) => any> = [
-  state => {
-    for (let server of state.settings.servers) {
+import { Store } from './store'
+import RNFS from 'react-native-fs'
+import { rmdir } from '@app/util/fs'
+
+const migrations: Array<(state: any) => Promise<any>> = [
+  async state => {
+    for (const server of state.settings.servers) {
       server.usePlainPassword = false
     }
 
+    return state
+  },
+  async state => {
+    const store = state as Store
+    const keysToDelete = ['coverArtThumb', 'artistArtThumb']
+
+    for (const serverId in store.cacheDirs) {
+      for (const key in keysToDelete) {
+        await rmdir(`${RNFS.DocumentDirectoryPath}/servers/${serverId}/${key}`)
+        delete state.cacheFiles[serverId][key]
+      }
+    }
+
     return state
   },
 ]