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vapi-cachestorage.js
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vapi-cachestorage.js
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/*******************************************************************************
uBlock - a browser extension to block requests.
Copyright (C) 2018 The uBlock authors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/* global self, safari, SafariBrowserTab, µBlock */
// For background page
'use strict';
/******************************************************************************/
(function() {
/******************************************************************************/
initStorageLib(); // Initialize storage library
/******************************************************************************/
var storageQuota = 104857600; // copied from Info.plist
localforage.config({
name: 'ublock',
size: storageQuota,
storeName: 'keyvaluepairs'
});
vAPI.cacheStorage = {
QUOTA_BYTES: storageQuota, // copied from Info.plist
get: function(keys, callback) {
if ( typeof callback !== 'function' ) {
return;
}
var result = {};
if ( keys === null ) {
localforage.iterate(function(value, key) {
if ( typeof value === 'string' ) {
result[key] = JSON.parse(value);
}
}, function() {
callback(result);
});
} else if ( typeof keys === 'string' ) {
localforage.getItem(keys, function(err, value) {
if ( typeof value === 'string' ) {
result[keys] = JSON.parse(value);
}
callback(result);
});
} else if ( Array.isArray(keys) ) {
var toSatisfy = keys.length, n = toSatisfy;
if ( n === 0 ) {
callback(result);
return;
}
var key;
for ( var i = 0; i < n; i++ ) {
key = keys[i];
localforage.getItem(key, (function(key) {
return function(err, value) {
toSatisfy--;
if ( typeof value === 'string' ) {
result[key] = JSON.parse(value);
}
if ( toSatisfy === 0 ) {
callback(result);
}
}
})(key));
}
} else if ( typeof keys === 'object' ) {
for ( var key in keys ) {
if ( !keys.hasOwnProperty(key) ) {
continue;
}
result[key] = keys[key];
}
localforage.iterate(function(value, key) {
if ( !keys.hasOwnProperty(key) ) return;
if ( typeof value === 'string' ) {
result[key] = JSON.parse(value);
}
}, function() {
callback(result);
});
}
},
set: function(details, callback) {
var key, toSatisfy = 0;
for ( key in details ) {
if ( !details.hasOwnProperty(key) ) {
continue;
}
toSatisfy++;
}
if ( toSatisfy === 0 ) {
// Nothing to set
callback && callback();
return;
}
var callbackCaller = function() {
if ( --toSatisfy === 0 ) {
callback && callback();
}
};
for ( key in details ) {
if ( !details.hasOwnProperty(key) ) {
continue;
}
localforage.setItem(key, JSON.stringify(details[key]), callbackCaller);
}
},
remove: function(keys) {
if ( typeof keys === 'string' ) {
keys = [keys];
}
for ( var i = 0, n = keys.length; i < n; i++ ) {
localforage.removeItem(keys[i]);
}
},
clear: function(callback) {
localforage.clear(function() {
typeof callback === 'function' && callback();
});
},
getBytesInUse: function(keys, callback) {
if ( typeof callback !== 'function' ) {
return;
}
var size = 0;
if ( Array.isArray(keys) ) {
var toSatisfy = keys.length, n = toSatisfy;
if ( n === 0 ) {
callback(0);
return;
}
var callbackCaller = function(err, value) {
size += (value || '').length;
if ( --toSatisfy === 0 ) {
callback(size);
}
};
for ( var i = 0; i < n; i++ ) {
localforage.getItem(keys[i], callbackCaller);
}
} else {
localforage.iterate(function(value, key) {
size += (value || '').length;
}, function() {
callback(size);
});
}
}
};
function initStorageLib() {
/*!
localForage -- Offline Storage, Improved
Version 1.4.3
https://localforage.github.io/localForage
(c) 2013-2016 Mozilla, Apache License 2.0
*/
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