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FileCache.js.html
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<!DOCTYPE html>
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<title>JSDoc: Source: FileCache.js</title>
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<h1 class="page-title">Source: FileCache.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>/*
* Copyright 2020 WICKLETS LLC
*
* This file is part of Wick Engine.
*
* Wick Engine 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.
*
* Wick Engine 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 Wick Engine. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* Global utility class for storing and retrieving large file data.
*/
Wick.FileCache = class {
/**
* A prefix to use in localforage so we can identify which items in localforage are files.
* @type {string}
*/
static get FILE_LOCALFORAGE_KEY_PREFIX () {
return 'filesrc_'; // This should never change.
}
/**
* Add a file to the cache.
* @param {string} src - The file source
* @param {string} uuid - The UUID of the file
*/
static addFile (src, uuid) {
this._files[uuid] = {
src: src
};
// Save asset to localforage
localforage.setItem(this.getLocalForageKeyForUUID(uuid), src).then(() => {
});
}
/**
* Get info for a file by its UUID.
* @param {string} uuid - The UUID of the file
* @returns {object} The file info
*/
static getFile (uuid) {
var file = this._files[uuid];
if(!file) {
console.error('Asset with UUID ' + uuid + ' was not found in FileCache!');
return null;
} else {
return file;
}
}
/**
* Removes a file from the FileCache with a given UUID.
* @param {string} uuid - the UUID of the file to remove.
*/
static removeFile (uuid) {
delete this._files[uuid];
// Remove file from localforage
localforage.removeItem(this.getLocalForageKeyForUUID(uuid)).then(() => {});
}
/**
* Loads all files from local forage associated with a previously saved project, if possible.
* @param {Wick.Project} project - the project that we want to load assets for.
* @param {function} callback - called when the assets are done being loaded.
*/
static loadFilesFromLocalforage (project, callback) {
Promise.all(project.getAssets().map(asset => {
return localforage.getItem(this.getLocalForageKeyForUUID(asset.uuid));
})).then((assets) => {
for(var i = 0; i < assets.length; i++) {
this.addFile(assets[i], project.getAssets()[i].uuid);
}
callback();
});
}
/**
* On object containing all files in WickFileCache.
* @returns {object} All the files in an object with the format:
*/
static getAllFiles () {
var files = [];
for (var uuid in this._files) {
files.push({
uuid: uuid,
src: this._files[uuid].src,
});
}
return files;
}
/**
* Clear the cache.
*/
static clear () {
this._files = {};
}
static clearLocalforage () {
// Clear all files from localforage
for(var uuid in this._files) {
localforage.removeItem(this.getLocalForageKeyForUUID(uuid)).then(() => {});
}
}
static getLocalForageKeyForUUID (uuid) {
return this.FILE_LOCALFORAGE_KEY_PREFIX + uuid;
}
}
Wick.FileCache._files = {};
</code></pre>
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