94 lines
2.8 KiB
JavaScript
94 lines
2.8 KiB
JavaScript
define([
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'/common/common-util.js',
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'/bower_components/localforage/dist/localforage.min.js',
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], function (Util, localForage) {
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var S = {};
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var cache = localForage.createInstance({
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name: "cp_cache"
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});
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S.getBlobCache = function (id, cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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cache.getItem(id, function (err, obj) {
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if (err || !obj || !obj.c) {
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return void cb(err || 'EINVAL');
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}
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cb(null, obj.c);
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obj.t = +new Date();
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cache.setItem(id, obj);
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});
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};
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S.setBlobCache = function (id, u8, cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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if (!u8) { return void cb('EINVAL'); }
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cache.setItem(id, {
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c: u8,
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t: (+new Date()) // 't' represent the "lastAccess" of this cache (get or set)
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}, function (err) {
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cb(err);
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});
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};
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// id: channel ID or blob ID
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// returns array of messages
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S.getChannelCache = function (id, cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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cache.getItem(id, function (err, obj) {
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if (err || !obj || !Array.isArray(obj.c)) {
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return void cb(err || 'EINVAL');
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}
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cb(null, obj);
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obj.t = +new Date();
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cache.setItem(id, obj);
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});
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};
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// Keep the last two checkpoint + any checkpoint that may exist in the last 100 messages
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// FIXME: duplicate system with sliceCpIndex from lib/hk-util.js
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var checkCheckpoints = function (array) {
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if (!Array.isArray(array)) { return; }
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// Keep the last 100 messages
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if (array.length > 100) {
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array.splice(0, array.length - 100);
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}
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// Remove every message before the first checkpoint
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var firstCpIdx;
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array.some(function (el, i) {
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if (!el.isCheckpoint) { return; }
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firstCpIdx = i;
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return true;
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});
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array.splice(0, firstCpIdx);
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};
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S.storeCache = function (id, validateKey, val, cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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if (!Array.isArray(val) || !validateKey) { return void cb('EINVAL'); }
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checkCheckpoints(val);
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cache.setItem(id, {
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k: validateKey,
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c: val,
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t: (+new Date()) // 't' represent the "lastAccess" of this cache (get or set)
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}, function (err) {
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cb(err);
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});
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};
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S.clearChannel = function (id, cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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cache.removeItem(id, function () {
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cb();
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});
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};
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S.clear = function (cb) {
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cb = Util.once(Util.mkAsync(cb || function () {}));
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cache.clear(cb);
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};
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self.CryptPad_clearIndexedDB = S.clear;
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return S;
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});
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