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168 lines
4.8 KiB
168 lines
4.8 KiB
import asyncDB from './db';
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import { autoPlayGif } from '../initial_state';
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const accountAssetKeys = ['avatar', 'avatar_static', 'header', 'header_static'];
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const avatarKey = autoPlayGif ? 'avatar' : 'avatar_static';
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const limit = 1024;
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// ServiceWorker and Cache API is not available on iOS 11
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// https://webkit.org/status/#specification-service-workers
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const asyncCache = window.caches ? caches.open('mastodon-system') : Promise.reject();
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function printErrorIfAvailable(error) {
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if (error) {
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console.warn(error);
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}
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}
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function put(name, objects, onupdate, oncreate) {
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return asyncDB.then(db => new Promise((resolve, reject) => {
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const putTransaction = db.transaction(name, 'readwrite');
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const putStore = putTransaction.objectStore(name);
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const putIndex = putStore.index('id');
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objects.forEach(object => {
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putIndex.getKey(object.id).onsuccess = retrieval => {
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function addObject() {
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putStore.add(object);
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}
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function deleteObject() {
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putStore.delete(retrieval.target.result).onsuccess = addObject;
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}
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if (retrieval.target.result) {
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if (onupdate) {
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onupdate(object, retrieval.target.result, putStore, deleteObject);
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} else {
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deleteObject();
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}
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} else {
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if (oncreate) {
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oncreate(object, addObject);
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} else {
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addObject();
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}
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}
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};
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});
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putTransaction.oncomplete = () => {
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const readTransaction = db.transaction(name, 'readonly');
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const readStore = readTransaction.objectStore(name);
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const count = readStore.count();
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count.onsuccess = () => {
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const excess = count.result - limit;
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if (excess > 0) {
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const retrieval = readStore.getAll(null, excess);
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retrieval.onsuccess = () => resolve(retrieval.result);
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retrieval.onerror = reject;
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} else {
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resolve([]);
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}
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};
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count.onerror = reject;
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};
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putTransaction.onerror = reject;
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}));
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}
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function evictAccountsByRecords(records) {
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asyncDB.then(db => {
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const transaction = db.transaction(['accounts', 'statuses'], 'readwrite');
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const accounts = transaction.objectStore('accounts');
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const accountsIdIndex = accounts.index('id');
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const accountsMovedIndex = accounts.index('moved');
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const statuses = transaction.objectStore('statuses');
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const statusesIndex = statuses.index('account');
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function evict(toEvict) {
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toEvict.forEach(record => {
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asyncCache
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.then(cache => accountAssetKeys.forEach(key => cache.delete(records[key])))
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.catch(printErrorIfAvailable);
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accountsMovedIndex.getAll(record.id).onsuccess = ({ target }) => evict(target.result);
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statusesIndex.getAll(record.id).onsuccess =
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({ target }) => evictStatusesByRecords(target.result);
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accountsIdIndex.getKey(record.id).onsuccess =
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({ target }) => target.result && accounts.delete(target.result);
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});
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}
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evict(records);
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}).catch(printErrorIfAvailable);
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}
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export function evictStatus(id) {
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evictStatuses([id]);
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}
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export function evictStatuses(ids) {
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asyncDB.then(db => {
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const store = db.transaction('statuses', 'readwrite').objectStore('statuses');
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const idIndex = store.index('id');
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const reblogIndex = store.index('reblog');
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ids.forEach(id => {
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reblogIndex.getAllKeys(id).onsuccess =
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({ target }) => target.result.forEach(reblogKey => store.delete(reblogKey));
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idIndex.getKey(id).onsuccess =
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({ target }) => target.result && store.delete(target.result);
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});
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}).catch(printErrorIfAvailable);
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}
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function evictStatusesByRecords(records) {
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evictStatuses(records.map(({ id }) => id));
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}
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export function putAccounts(records) {
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const newURLs = [];
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put('accounts', records, (newRecord, oldKey, store, oncomplete) => {
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store.get(oldKey).onsuccess = ({ target }) => {
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accountAssetKeys.forEach(key => {
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const newURL = newRecord[key];
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const oldURL = target.result[key];
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if (newURL !== oldURL) {
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asyncCache
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.then(cache => cache.delete(oldURL))
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.catch(printErrorIfAvailable);
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}
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});
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const newURL = newRecord[avatarKey];
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const oldURL = target.result[avatarKey];
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if (newURL !== oldURL) {
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newURLs.push(newURL);
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}
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oncomplete();
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};
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}, (newRecord, oncomplete) => {
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newURLs.push(newRecord[avatarKey]);
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oncomplete();
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}).then(records => {
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evictAccountsByRecords(records);
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asyncCache
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.then(cache => cache.addAll(newURLs))
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.catch(printErrorIfAvailable);
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}).catch(printErrorIfAvailable);
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}
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export function putStatuses(records) {
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put('statuses', records)
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.then(evictStatusesByRecords)
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.catch(printErrorIfAvailable);
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}
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