Free stroage if it is exceeding disk quota (#7061)

app/javascript/mastodon/actions/accounts.js

@@ -1,5 +1,5 @@
 import api, { getLinks } from '../api';
-import asyncDB from '../storage/db';
+import openDB from '../storage/db';
 import { importAccount, importFetchedAccount, importFetchedAccounts } from './importer';
 
 export const ACCOUNT_FETCH_REQUEST = 'ACCOUNT_FETCH_REQUEST';
@@ -94,12 +94,15 @@ export function fetchAccount(id) {
 
     dispatch(fetchAccountRequest(id));
 
-    asyncDB.then(db => getFromDB(
+    openDB().then(db => getFromDB(
       dispatch,
       getState,
       db.transaction('accounts', 'read').objectStore('accounts').index('id'),
       id
-    )).catch(() => api(getState).get(`/api/v1/accounts/${id}`).then(response => {
+    ).then(() => db.close(), error => {
+      db.close();
+      throw error;
+    })).catch(() => api(getState).get(`/api/v1/accounts/${id}`).then(response => {
       dispatch(importFetchedAccount(response.data));
     })).then(() => {
       dispatch(fetchAccountSuccess());

app/javascript/mastodon/actions/importer/index.js

@@ -1,3 +1,4 @@
+import { autoPlayGif } from '../../initial_state';
 import { putAccounts, putStatuses } from '../../storage/modifier';
 import { normalizeAccount, normalizeStatus } from './normalizer';
 
@@ -44,7 +45,7 @@ export function importFetchedAccounts(accounts) {
   }
 
   accounts.forEach(processAccount);
-  putAccounts(normalAccounts);
+  putAccounts(normalAccounts, !autoPlayGif);
 
   return importAccounts(normalAccounts);
 }

app/javascript/mastodon/actions/statuses.js

@@ -1,5 +1,5 @@
 import api from '../api';
-import asyncDB from '../storage/db';
+import openDB from '../storage/db';
 import { evictStatus } from '../storage/modifier';
 
 import { deleteFromTimelines } from './timelines';
@@ -92,12 +92,17 @@ export function fetchStatus(id) {
 
     dispatch(fetchStatusRequest(id, skipLoading));
 
-    asyncDB.then(db => {
+    openDB().then(db => {
       const transaction = db.transaction(['accounts', 'statuses'], 'read');
       const accountIndex = transaction.objectStore('accounts').index('id');
       const index = transaction.objectStore('statuses').index('id');
 
-      return getFromDB(dispatch, getState, accountIndex, index, id);
+      return getFromDB(dispatch, getState, accountIndex, index, id).then(() => {
+        db.close();
+      }, error => {
+        db.close();
+        throw error;
+      });
     }).then(() => {
       dispatch(fetchStatusSuccess(skipLoading));
     }, () => api(getState).get(`/api/v1/statuses/${id}`).then(response => {

app/javascript/mastodon/service_worker/entry.js

@@ -1,3 +1,4 @@
+import { freeStorage } from '../storage/modifier';
 import './web_push_notifications';
 
 function openSystemCache() {
@@ -42,8 +43,10 @@ self.addEventListener('fetch', function(event) {
 
     event.respondWith(asyncResponse.then(async response => {
       if (response.ok || response.type === 'opaqueredirect') {
-        const cache = await asyncCache;
-        await cache.delete('/');
+        await Promise.all([
+          asyncCache.then(cache => cache.delete('/')),
+          indexedDB.deleteDatabase('mastodon'),
+        ]);
       }
 
       return response;
@@ -56,7 +59,11 @@ self.addEventListener('fetch', function(event) {
         const fetched = await fetch(event.request);
 
         if (fetched.ok) {
-          await cache.put(event.request.url, fetched.clone());
+          try {
+            await cache.put(event.request.url, fetched.clone());
+          } finally {
+            freeStorage();
+          }
         }
 
         return fetched;

app/javascript/mastodon/storage/db.js

@@ -1,15 +1,14 @@
-import { me } from '../initial_state';
-
-export default new Promise((resolve, reject) => {
+export default () => new Promise((resolve, reject) => {
+  // ServiceWorker is required to synchronize the login state.
   // Microsoft Edge 17 does not support getAll according to:
   // Catalog of standard and vendor APIs across browsers - Microsoft Edge Development
   // https://developer.microsoft.com/en-us/microsoft-edge/platform/catalog/?q=specName%3Aindexeddb
-  if (!me || !('getAll' in IDBObjectStore.prototype)) {
+  if (!('caches' in self && 'getAll' in IDBObjectStore.prototype)) {
     reject();
     return;
   }
 
-  const request = indexedDB.open('mastodon:' + me);
+  const request = indexedDB.open('mastodon');
 
   request.onerror = reject;
   request.onsuccess = ({ target }) => resolve(target.result);

app/javascript/mastodon/storage/modifier.js

@@ -1,13 +1,14 @@
-import asyncDB from './db';
-import { autoPlayGif } from '../initial_state';
+import openDB from './db';
 
 const accountAssetKeys = ['avatar', 'avatar_static', 'header', 'header_static'];
-const avatarKey = autoPlayGif ? 'avatar' : 'avatar_static';
-const limit = 1024;
+const storageMargin = 8388608;
+const storeLimit = 1024;
 
-// ServiceWorker and Cache API is not available on iOS 11
-// https://webkit.org/status/#specification-service-workers
-const asyncCache = window.caches ? caches.open('mastodon-system') : Promise.reject();
+function openCache() {
+  // ServiceWorker and Cache API is not available on iOS 11
+  // https://webkit.org/status/#specification-service-workers
+  return self.caches ? caches.open('mastodon-system') : Promise.reject();
+}
 
 function printErrorIfAvailable(error) {
   if (error) {
@@ -16,7 +17,7 @@ function printErrorIfAvailable(error) {
 }
 
 function put(name, objects, onupdate, oncreate) {
-  return asyncDB.then(db => new Promise((resolve, reject) => {
+  return openDB().then(db => (new Promise((resolve, reject) => {
     const putTransaction = db.transaction(name, 'readwrite');
     const putStore = putTransaction.objectStore(name);
     const putIndex = putStore.index('id');
@@ -53,7 +54,7 @@ function put(name, objects, onupdate, oncreate) {
       const count = readStore.count();
 
       count.onsuccess = () => {
-        const excess = count.result - limit;
+        const excess = count.result - storeLimit;
 
         if (excess > 0) {
           const retrieval = readStore.getAll(null, excess);
@@ -69,11 +70,17 @@ function put(name, objects, onupdate, oncreate) {
     };
 
     putTransaction.onerror = reject;
+  })).then(resolved => {
+    db.close();
+    return resolved;
+  }, error => {
+    db.close();
+    throw error;
   }));
 }
 
 function evictAccountsByRecords(records) {
-  asyncDB.then(db => {
+  return openDB().then(db => {
     const transaction = db.transaction(['accounts', 'statuses'], 'readwrite');
     const accounts = transaction.objectStore('accounts');
     const accountsIdIndex = accounts.index('id');
@@ -83,7 +90,7 @@ function evictAccountsByRecords(records) {
 
     function evict(toEvict) {
       toEvict.forEach(record => {
-        asyncCache
+        openCache()
           .then(cache => accountAssetKeys.forEach(key => cache.delete(records[key])))
           .catch(printErrorIfAvailable);
 
@@ -98,6 +105,8 @@ function evictAccountsByRecords(records) {
     }
 
     evict(records);
+
+    db.close();
   }).catch(printErrorIfAvailable);
 }
 
@@ -106,8 +115,9 @@ export function evictStatus(id) {
 }
 
 export function evictStatuses(ids) {
-  asyncDB.then(db => {
-    const store = db.transaction('statuses', 'readwrite').objectStore('statuses');
+  return openDB().then(db => {
+    const transaction = db.transaction('statuses', 'readwrite');
+    const store = transaction.objectStore('statuses');
     const idIndex = store.index('id');
     const reblogIndex = store.index('reblog');
 
@@ -118,14 +128,17 @@ export function evictStatuses(ids) {
       idIndex.getKey(id).onsuccess =
         ({ target }) => target.result && store.delete(target.result);
     });
+
+    db.close();
   }).catch(printErrorIfAvailable);
 }
 
 function evictStatusesByRecords(records) {
-  evictStatuses(records.map(({ id }) => id));
+  return evictStatuses(records.map(({ id }) => id));
 }
 
-export function putAccounts(records) {
+export function putAccounts(records, avatarStatic) {
+  const avatarKey = avatarStatic ? 'avatar_static' : 'avatar';
   const newURLs = [];
 
   put('accounts', records, (newRecord, oldKey, store, oncomplete) => {
@@ -135,7 +148,7 @@ export function putAccounts(records) {
         const oldURL = target.result[key];
 
         if (newURL !== oldURL) {
-          asyncCache
+          openCache()
             .then(cache => cache.delete(oldURL))
             .catch(printErrorIfAvailable);
         }
@@ -153,11 +166,12 @@ export function putAccounts(records) {
   }, (newRecord, oncomplete) => {
     newURLs.push(newRecord[avatarKey]);
     oncomplete();
-  }).then(records => {
-    evictAccountsByRecords(records);
-    asyncCache
-      .then(cache => cache.addAll(newURLs))
-      .catch(printErrorIfAvailable);
+  }).then(records => Promise.all([
+    evictAccountsByRecords(records),
+    openCache().then(cache => cache.addAll(newURLs)),
+  ])).then(freeStorage, error => {
+    freeStorage();
+    throw error;
   }).catch(printErrorIfAvailable);
 }
 
@@ -166,3 +180,27 @@ export function putStatuses(records) {
     .then(evictStatusesByRecords)
     .catch(printErrorIfAvailable);
 }
+
+export function freeStorage() {
+  return navigator.storage.estimate().then(({ quota, usage }) => {
+    if (usage + storageMargin < quota) {
+      return null;
+    }
+
+    return openDB().then(db => new Promise((resolve, reject) => {
+      const retrieval = db.transaction('accounts', 'readonly').objectStore('accounts').getAll(null, 1);
+
+      retrieval.onsuccess = () => {
+        if (retrieval.result.length > 0) {
+          resolve(evictAccountsByRecords(retrieval.result).then(freeStorage));
+        } else {
+          resolve(caches.delete('mastodon-system'));
+        }
+      };
+
+      retrieval.onerror = reject;
+
+      db.close();
+    }));
+  });
+}