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adapter.js	195.35 KB	-rw-rw-r--
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auto_rows.js	3.35 KB	-rw-rw-r--
backoff_timer.js	5.12 KB	-rw-rw-r--
chart_axis.js	7.43 KB	-rw-rw-r--
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chart_base.js	10.63 KB	-rw-rw-r--
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chart_line.js	2.13 KB	-rw-rw-r--
chart_output.js	1.1 KB	-rw-rw-r--
chart_output_base.js	2.09 KB	-rw-rw-r--
chart_output_chartjs.js	10.79 KB	-rw-rw-r--
chart_output_htmltable.js	3.36 KB	-rw-rw-r--
chart_pie.js	3.09 KB	-rw-rw-r--
chart_series.js	7.88 KB	-rw-rw-r--
chartjs-lazy.js	670.93 KB	-rw-rw-r--
chartjs.js	933 B	-rw-rw-r--
config.js	1.05 KB	-rw-rw-r--
custom_interaction_events.js	16.56 KB	-rw-rw-r--
event.js	3.03 KB	-rw-rw-r--
first.js	1.38 KB	-rw-rw-r--
form-autocomplete.js	40.7 KB	-rw-rw-r--
form-cohort-selector.js	2.56 KB	-rw-rw-r--
form-course-selector.js	3.75 KB	-rw-rw-r--
fragment.js	4.72 KB	-rw-rw-r--
icon_system.js	2.52 KB	-rw-rw-r--
icon_system_fontawesome.js	3.59 KB	-rw-rw-r--
icon_system_standard.js	2.14 KB	-rw-rw-r--
inplace_editable.js	13.18 KB	-rw-rw-r--
key_codes.js	1.32 KB	-rw-rw-r--
localstorage.js	2.1 KB	-rw-rw-r--
log.js	1.76 KB	-rw-rw-r--
loglevel.js	8.99 KB	-rw-rw-r--
modal.js	23.49 KB	-rw-rw-r--
modal_backdrop.js	3.86 KB	-rw-rw-r--
modal_cancel.js	2.57 KB	-rw-rw-r--
modal_confirm.js	1.78 KB	-rw-rw-r--
modal_events.js	1.49 KB	-rw-rw-r--
modal_factory.js	7.64 KB	-rw-rw-r--
modal_registry.js	2.29 KB	-rw-rw-r--
modal_save_cancel.js	3.74 KB	-rw-rw-r--
mustache.js	22.86 KB	-rw-rw-r--
notification.js	9.2 KB	-rw-rw-r--
paged_content_events.js	998 B	-rw-rw-r--
paged_content_factory.js	9.6 KB	-rw-rw-r--
paged_content_pages.js	10.26 KB	-rw-rw-r--
paged_content_paging_bar.js	6.83 KB	-rw-rw-r--
paged_content_paging_dropdown....	7.18 KB	-rw-rw-r--
permissionmanager.js	9.61 KB	-rw-rw-r--
popover_region_controller.js	12.58 KB	-rw-rw-r--
popper.js	79.2 KB	-rw-rw-r--
search-input.js	3.24 KB	-rw-rw-r--
sessionstorage.js	2.24 KB	-rw-rw-r--
storagewrapper.js	5.17 KB	-rw-rw-r--
str.js	7.37 KB	-rw-rw-r--
tag.js	18.12 KB	-rw-rw-r--
templates.js	31.41 KB	-rw-rw-r--
tooltip.js	4.1 KB	-rw-rw-r--
tree.js	17.58 KB	-rw-rw-r--
truncate.js	6.65 KB	-rw-rw-r--
url.js	3.69 KB	-rw-rw-r--
user_date.js	7.47 KB	-rw-rw-r--
yui.js	1.15 KB	-rw-rw-r--

Code Editor : user_date.js

// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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 Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Fetch and render dates from timestamps.
 *
 * @module     core/user_date
 * @package    core
 * @copyright  2017 Ryan Wyllie <ryan@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
define(['jquery', 'core/ajax', 'core/sessionstorage', 'core/config'],
        function($, Ajax, Storage, Config) {

/** @var {object} promisesCache Store all promises we've seen so far. */
    var promisesCache = {};

/**
     * Generate a cache key for the given request. The request should
     * have a timestamp and format key.
     *
     * @param {object} request
     * @return {string}
     */
    var getKey = function(request) {
        var language = $('html').attr('lang').replace(/-/g, '_');
        return 'core_user_date/' +
               language + '/' +
               Config.usertimezone + '/' +
               request.timestamp + '/' +
               request.format;
    };

/**
     * Retrieve a transformed date from the browser's storage.
     *
     * @param {string} key
     * @return {string}
     */
    var getFromLocalStorage = function(key) {
        return Storage.get(key);
    };

/**
     * Save the transformed date in the browser's storage.
     *
     * @param {string} key
     * @param {string} value
     */
    var addToLocalStorage = function(key, value) {
        Storage.set(key, value);
    };

/**
     * Check if a key is in the module's cache.
     *
     * @param {string} key
     * @return {bool}
     */
    var inPromisesCache = function(key) {
        return (typeof promisesCache[key] !== 'undefined');
    };

/**
     * Retrieve a promise from the module's cache.
     *
     * @param {string} key
     * @return {object} jQuery promise
     */
    var getFromPromisesCache = function(key) {
        return promisesCache[key];
    };

/**
     * Save the given promise in the module's cache.
     *
     * @param {string} key
     * @param {object} promise
     */
    var addToPromisesCache = function(key, promise) {
        promisesCache[key] = promise;
    };

/**
     * Send a request to the server for each of the required timestamp
     * and format combinations.
     *
     * Resolves the date's deferred with the values returned from the
     * server and saves the value in local storage.
     *
     * @param {array} dates
     * @return {object} jQuery promise
     */
    var loadDatesFromServer = function(dates) {
        var args = dates.map(function(data) {
            return {
                timestamp: data.timestamp,
                format: data.format
            };
        });

var request = {
            methodname: 'core_get_user_dates',
            args: {
                contextid: Config.contextid,
                timestamps: args
            }
        };

return Ajax.call([request], true, true)[0].then(function(results) {
            results.dates.forEach(function(value, index) {
                var date = dates[index];
                var key = getKey(date);

addToLocalStorage(key, value);
                date.deferred.resolve(value);
            });
            return;
        })
        .catch(function(ex) {
            // If we failed to retrieve the dates then reject the date's
            // deferred objects to make sure they don't hang.
            dates.forEach(function(date) {
                date.deferred.reject(ex);
            });
        });
    };

/**
     * Takes an array of request objects and returns a promise that
     * is resolved with an array of formatted dates.
     *
     * The values in the returned array will be ordered the same as
     * the request array.
     *
     * This function will check both the module's static promises cache
     * and the browser's session storage to see if the user dates have
     * already been loaded in order to avoid sending a network request
     * if possible.
     *
     * Only dates not found in either cache will be sent to the server
     * for transforming.
     *
     * A request object must have a timestamp key and a format key.
     *
     * E.g.
     * var request = [
     *     {
     *         timestamp: 1293876000,
     *         format: '%d %B %Y'
     *     },
     *     {
     *         timestamp: 1293876000,
     *         format: '%A, %d %B %Y, %I:%M %p'
     *     }
     * ];
     *
     * UserDate.get(request).done(function(dates) {
     *     console.log(dates[0]); // prints "1 January 2011".
     *     console.log(dates[1]); // prints "Saturday, 1 January 2011, 10:00 AM".
     * });
     *
     * @param {array} requests
     * @return {object} jQuery promise
     */
    var get = function(requests) {
        var ajaxRequests = [];
        var promises = [];

// Loop over each of the requested timestamp/format combos
        // and add a promise to the promises array for them.
        requests.forEach(function(request) {
            var key = getKey(request);

// If we've already got a promise then use it.
            if (inPromisesCache(key)) {
                promises.push(getFromPromisesCache(key));
            } else {
                var deferred = $.Deferred();
                var cached = getFromLocalStorage(key);

if (cached) {
                    // If we were able to get the value from session storage
                    // then we can resolve the deferred with that value. No
                    // need to ask the server to transform it for us.
                    deferred.resolve(cached);
                } else {
                    // Add this request to the list of ones we need to load
                    // from the server. Include the deferred so that it can
                    // be resolved when the server has responded with the
                    // transformed values.
                    request.deferred = deferred;
                    ajaxRequests.push(request);
                }

// Remember this promise for next time so that we can
                // bail out early if it is requested again.
                addToPromisesCache(key, deferred.promise());
                promises.push(deferred.promise());
            }
        });

// If we have any requests that we couldn't resolve from the caches
        // then let's ask the server to get them for us.
        if (ajaxRequests.length) {
            loadDatesFromServer(ajaxRequests);
        }

// Wait for all of the promises to resolve. Some of them may be waiting
        // for a response from the server.
        return $.when.apply($, promises).then(function() {
            // This looks complicated but it's just converting an unknown
            // length of arguments into an array for the promise to resolve
            // with.
            return arguments.length === 1 ? [arguments[0]] : Array.apply(null, arguments);
        });
    };

return {
        get: get
    };
});

${this.title}

Code Editor : user_date.js