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{"version":3,"file":"icon_system_fontawesome.min.js","sources":["../src/icon_system_fontawesome.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * An Icon System implementation for FontAwesome.\n *\n * @module core/icon_system_fontawesome\n * @copyright 2017 Damyon Wiese\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\n\nimport {call as fetchMany} from './ajax';\nimport LocalStorage from './localstorage';\nimport IconSystem from './icon_system';\nimport * as Mustache from './mustache';\nimport * as Config from './config';\nimport * as Url from './url';\n\n/**\n * An set of properties for an icon.\n * @typedef {object} IconProperties\n * @property {array} attributes\n * @private\n */\n\n/**\n * The FontAwesome icon system.\n */\nexport default class IconSystemFontawesome extends IconSystem {\n /**\n * @var {Map} staticMap A map of icon names to FA Icon.\n * @private\n */\n static staticMap = null;\n\n /**\n * @var {Promise} fetchPromise The promise used when fetching the result\n * @private\n */\n static fetchPromise = null;\n\n /**\n * @var {string} cacheKey The key used to store the icon map in LocalStorage.\n * @private\n */\n static cacheKey = `core_iconsystem/theme/${Config.theme}/core/iconmap-fontawesome`;\n\n /**\n * Prefetch resources so later calls to renderIcon can be resolved synchronously.\n *\n * @returns {Promise<IconSystemFontawesome>}\n */\n init() {\n if (IconSystemFontawesome.staticMap) {\n return Promise.resolve(this);\n }\n\n if (this.getMapFromCache()) {\n return Promise.resolve(this);\n }\n\n if (IconSystemFontawesome.fetchPromise) {\n return IconSystemFontawesome.fetchPromise;\n }\n\n return this.fetchMapFromServer();\n }\n\n /**\n * Get the icon map from LocalStorage.\n *\n * @private\n * @returns {Map}\n */\n getMapFromCache() {\n const map = LocalStorage.get(IconSystemFontawesome.cacheKey);\n if (map) {\n IconSystemFontawesome.staticMap = new Map(JSON.parse(map));\n }\n return IconSystemFontawesome.staticMap;\n }\n\n /**\n * Fetch the map data from the server.\n *\n * @private\n * @returns {Promise}\n */\n _fetchMapFromServer() {\n return fetchMany([{\n methodname: 'core_output_load_fontawesome_icon_system_map',\n args: {\n themename: Config.theme,\n },\n }], true, false, false, 0, Config.themerev)[0];\n }\n\n /**\n * Fetch the map data from the server.\n *\n * @returns {Promise<IconSystemFontawesome>}\n * @private\n */\n async fetchMapFromServer() {\n IconSystemFontawesome.fetchPromise = (async () => {\n const mapData = await this._fetchMapFromServer();\n\n IconSystemFontawesome.staticMap = new Map(Object.entries(mapData).map(([, value]) => ([\n `${value.component}/${value.pix}`,\n value.to,\n ])));\n LocalStorage.set(\n IconSystemFontawesome.cacheKey,\n JSON.stringify(Array.from(IconSystemFontawesome.staticMap.entries())),\n );\n\n return this;\n })();\n\n return IconSystemFontawesome.fetchPromise;\n }\n\n /**\n * Render an icon.\n *\n * @param {string} key\n * @param {string} component\n * @param {string} title\n * @param {string} template\n * @return {string} The rendered HTML content\n */\n renderIcon(key, component, title, template) {\n const iconKey = `${component}/${key}`;\n const mappedIcon = IconSystemFontawesome.staticMap.get(iconKey);\n const unmappedIcon = this.getUnmappedIcon(mappedIcon, key, component, title);\n\n const context = {\n title,\n unmappedIcon,\n alt: title,\n key: mappedIcon,\n };\n\n if (typeof title === \"undefined\" || title === '') {\n context['aria-hidden'] = true;\n }\n\n return Mustache.render(template, context).trim();\n }\n\n /**\n * Get the unmapped icon content, if the icon is not mapped.\n *\n * @param {IconProperties} mappedIcon\n * @param {string} key\n * @param {string} component\n * @param {string} title\n * @returns {IconProperties|null}\n * @private\n */\n getUnmappedIcon(mappedIcon, key, component, title) {\n if (mappedIcon) {\n return null;\n }\n\n return {\n attributes: [\n {name: 'src', value: Url.imageUrl(key, component)},\n {name: 'alt', value: title},\n {name: 'title', value: title}\n ],\n };\n }\n\n /**\n * Get the name of the template to pre-cache for this icon system.\n *\n * @return {string}\n * @method getTemplateName\n */\n getTemplateName() {\n return 'core/pix_icon_fontawesome';\n 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