Proyectos de Subversion Moodle

// 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/>.

/**

 * Javascript to handle changing users via the user selector in the header.

 *

 * @module     mod_assign/grading_navigation

 * @copyright  2016 Damyon Wiese <damyon@moodle.com>

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @since      3.1

 */

define(['jquery', 'core/notification', 'core/str', 'core/form-autocomplete',

        'core/ajax', 'core_user/repository', 'mod_assign/grading_form_change_checker'],

       function($, notification, str, autocomplete, ajax, UserRepository, checker) {

    /**

     * GradingNavigation class.

     *

     * @class mod_assign/grading_navigation

     * @param {String} selector The selector for the page region containing the user navigation.

     */

    var GradingNavigation = function(selector) {

        this._regionSelector = selector;

        this._region = $(selector);

        this._filters = [];

        this._users = [];

        this._filteredUsers = [];

        this._lastXofYUpdate = 0;

        this._firstLoadUsers = true;

        let url = new URL(window.location);

        if (parseInt(url.searchParams.get('treset')) > 0) {

            // Remove 'treset' url parameter to make sure that

            // table preferences won't be reset on page refresh.

            url.searchParams.delete('treset');

            window.history.replaceState({}, "", url);

        }

        // Get the current user list from a webservice.

        this._loadAllUsers();

        // We do not allow navigation while ajax requests are pending.

        // Attach listeners to the select and arrow buttons.

        this._region.find('[data-action="previous-user"]').on('click', this._handlePreviousUser.bind(this));

        this._region.find('[data-action="next-user"]').on('click', this._handleNextUser.bind(this));

        this._region.find('[data-action="change-user"]').on('change', this._handleChangeUser.bind(this));

        this._region.find('[data-region="user-filters"]').on('click', this._toggleExpandFilters.bind(this));

        this._region.find('[data-region="user-resettable"]').on('click', this._toggleResetTable.bind());

        $(document).on('user-changed', this._refreshSelector.bind(this));

        $(document).on('done-saving-show-next', this._handleNextUser.bind(this));

        // Position the configure filters panel under the link that expands it.

        var toggleLink = this._region.find('[data-region="user-filters"]');

        var configPanel = $(document.getElementById(toggleLink.attr('aria-controls')));

        configPanel.on('change', 'select', this._filterChanged.bind(this));

        var userid = $('[data-region="grading-navigation-panel"]').data('first-userid');

        if (userid) {

            this._selectUserById(userid);

        }

        str.get_string('changeuser', 'mod_assign').done(function(s) {

                autocomplete.enhance('[data-action=change-user]', false, 'mod_assign/participant_selector', s);

            }

        ).fail(notification.exception);

        $(document).bind("start-loading-user", function() {

            this._isLoading = true;

        }.bind(this));

        $(document).bind("finish-loading-user", function() {

            this._isLoading = false;

        }.bind(this));

    };

    /** @property {Boolean} Boolean tracking active ajax requests. */

    GradingNavigation.prototype._isLoading = false;

    /** @property {String} Selector for the page region containing the user navigation. */

    GradingNavigation.prototype._regionSelector = null;

    /** @property {Array} The list of active filter keys */

    GradingNavigation.prototype._filters = null;

    /** @property {Array} The list of users */

    GradingNavigation.prototype._users = null;

    /** @property {JQuery} JQuery node for the page region containing the user navigation. */

    GradingNavigation.prototype._region = null;

    /** @property {String} Last active filters */

    GradingNavigation.prototype._lastFilters = '';

    /**

     * Load the list of all users for this assignment.

     *

     * @private

     * @method _loadAllUsers

     * @return {Boolean} True if the user list was fetched.

     */

    GradingNavigation.prototype._loadAllUsers = function() {

        var select = this._region.find('[data-action=change-user]');

        var assignmentid = select.attr('data-assignmentid');

        var groupid = select.attr('data-groupid');

        var filterPanel = this._region.find('[data-region="configure-filters"]');

        var filter = filterPanel.find('select[name="filter"]').val();

        var workflowFilter = filterPanel.find('select[name="workflowfilter"]');

        if (workflowFilter) {

            filter += ',' + workflowFilter.val();

        }

        var markerFilter = filterPanel.find('select[name="markerfilter"]');

        if (markerFilter) {

            filter += ',' + markerFilter.val();

        }

        if (this._lastFilters == filter) {

            return false;

        }

        this._lastFilters = filter;

        ajax.call([{

            methodname: 'mod_assign_list_participants',

            args: {assignid: assignmentid, groupid: groupid, filter: '', onlyids: true, tablesort: true},

            done: this._usersLoaded.bind(this),

            fail: notification.exception

        }]);

        return true;

    };

    /**

     * Call back to rebuild the user selector and x of y info when the user list is updated.

     *

     * @private

     * @method _usersLoaded

     * @param {Array} users

     */

    GradingNavigation.prototype._usersLoaded = function(users) {

        this._firstLoadUsers = false;

        this._filteredUsers = this._users = users;

        if (this._users.length) {

            // Position the configure filters panel under the link that expands it.

            var toggleLink = this._region.find('[data-region="user-filters"]');

            var configPanel = $(document.getElementById(toggleLink.attr('aria-controls')));

            configPanel.find('select[name="filter"]').trigger('change');

        } else {

            this._selectNoUser();

        }

        this._triggerNextUserEvent();

    };

    /**

     * Close the configure filters panel if a click is detected outside of it.

     *

     * @private

     * @method _checkClickOutsideConfigureFilters

     * @param {Event} event

     */

    GradingNavigation.prototype._checkClickOutsideConfigureFilters = function(event) {

        var configPanel = this._region.find('[data-region="configure-filters"]');

        if (!configPanel.is(event.target) && configPanel.has(event.target).length === 0) {

            var toggleLink = this._region.find('[data-region="user-filters"]');

            configPanel.hide();

            configPanel.attr('aria-hidden', 'true');

            toggleLink.attr('aria-expanded', 'false');

            $(document).unbind('click.mod_assign_grading_navigation');

        }

    };

    /**

     * Close the configure filters panel if a click is detected outside of it.

     *

     * @private

     * @method _updateFilterPreference

     * @param {Number} userId The current user id.

     * @param {Array} filterList The list of current filter values.

     * @param {Array} preferenceNames The names of the preferences to update

     * @return {Promise} Resolved when all the preferences are updated.

     */

    GradingNavigation.prototype._updateFilterPreferences = function(userId, filterList, preferenceNames) {

        var preferences = [],

            i = 0;

        if (filterList.length == 0 || this._firstLoadUsers) {

            // Nothing to update.

            var deferred = $.Deferred();

            deferred.resolve();

            return deferred;

        }

        // General filter.

        // Set the user preferences to the current filters.

        for (i = 0; i < filterList.length; i++) {

            var newValue = filterList[i];

            if (newValue == 'none') {

                newValue = '';

            }

            preferences.push({

                userid: userId,

                name: preferenceNames[i],

                value: newValue

            });

        }

        return UserRepository.setUserPreferences(preferences);

    };

    /**

     * Turn a filter on or off.

     *

     * @private

     * @method _filterChanged

     */

    GradingNavigation.prototype._filterChanged = function() {

        // There are 3 types of filter right now.

        var filterPanel = this._region.find('[data-region="configure-filters"]');

        var filters = filterPanel.find('select');

        var preferenceNames = [];

        this._filters = [];

        filters.each(function(idx, ele) {

            var element = $(ele);

            this._filters.push(element.val());

            preferenceNames.push('assign_' + element.prop('name'));

        }.bind(this));

        // Update the active filter string.

        var filterlist = [];

        filterPanel.find('option:checked').each(function(idx, ele) {

            filterlist[filterlist.length] = $(ele).text();

        });

        if (filterlist.length) {

            this._region.find('[data-region="user-filters"] span').text(filterlist.join(', '));

        } else {

            str.get_string('nofilters', 'mod_assign').done(function(s) {

                this._region.find('[data-region="user-filters"] span').text(s);

            }.bind(this)).fail(notification.exception);

        }

        var select = this._region.find('[data-action=change-user]');

        var currentUserID = select.data('currentuserid');

        this._updateFilterPreferences(currentUserID, this._filters, preferenceNames).done(function() {

            // Reload the list of users to apply the new filters.

            if (!this._loadAllUsers()) {

                var userid = parseInt(select.attr('data-selected'));

                let foundIndex = null;

                // Search the returned users for the current selection.

                $.each(this._filteredUsers, function(index, user) {

                    if (userid == user.id) {

                        foundIndex = index;

                    }

                });

                if (this._filteredUsers.length && foundIndex !== null) {

                    this._selectUserById(this._filteredUsers[foundIndex].id);

                } else {

                    this._selectNoUser();

                }

            }

        }.bind(this)).fail(notification.exception);

        this._refreshCount();

    };

    /**

     * Select no users, because no users match the filters.

     *

     * @private

     * @method _selectNoUser

     */

    GradingNavigation.prototype._selectNoUser = function() {

        // Detect unsaved changes, and offer to save them - otherwise change user right now.

        if (this._isLoading) {

            return;

        }

        if (checker.checkFormForChanges('[data-region="grade-panel"] .gradeform')) {

            // Form has changes, so we need to confirm before switching users.

            str.get_strings([

                {key: 'unsavedchanges', component: 'mod_assign'},

                {key: 'unsavedchangesquestion', component: 'mod_assign'},

                {key: 'saveandcontinue', component: 'mod_assign'},

                {key: 'cancel', component: 'core'},

            ]).done(function(strs) {

                notification.confirm(strs[0], strs[1], strs[2], strs[3], function() {

                    $(document).trigger('save-changes', -1);

                });

            });

        } else {

            $(document).trigger('user-changed', -1);

        }

    };

    /**

     * Select the specified user by id.

     *

     * @private

     * @method _selectUserById

     * @param {Number} userid

     */

    GradingNavigation.prototype._selectUserById = function(userid) {

        var select = this._region.find('[data-action=change-user]');

        var useridnumber = parseInt(userid, 10);

        // Detect unsaved changes, and offer to save them - otherwise change user right now.

        if (this._isLoading) {

            return;

        }

        if (checker.checkFormForChanges('[data-region="grade-panel"] .gradeform')) {

            // Form has changes, so we need to confirm before switching users.

            str.get_strings([

                {key: 'unsavedchanges', component: 'mod_assign'},

                {key: 'unsavedchangesquestion', component: 'mod_assign'},

                {key: 'saveandcontinue', component: 'mod_assign'},

                {key: 'cancel', component: 'core'},

            ]).done(function(strs) {

                notification.confirm(strs[0], strs[1], strs[2], strs[3], function() {

                    $(document).trigger('save-changes', useridnumber);

                });

            });

        } else {

            select.attr('data-selected', userid);

            // If we have some filtered users, and userid is specified, then trigger change.

            if (this._filteredUsers.length > 0 && !isNaN(useridnumber) && useridnumber > 0) {

                $(document).trigger('user-changed', useridnumber);

            }

        }

    };

    /**

     * Expand or collapse the filter config panel.

     *

     * @private

     * @method _toggleExpandFilters

     * @param {Event} event

     */

    GradingNavigation.prototype._toggleExpandFilters = function(event) {

        event.preventDefault();

        var toggleLink = $(event.target).closest('[data-region="user-filters"]');

        var expanded = toggleLink.attr('aria-expanded') == 'true';

        var configPanel = $(document.getElementById(toggleLink.attr('aria-controls')));

        if (expanded) {

            configPanel.hide();

            configPanel.attr('aria-hidden', 'true');

            toggleLink.attr('aria-expanded', 'false');

            $(document).unbind('click.mod_assign_grading_navigation');

        } else {

            configPanel.css('display', 'inline-block');

            configPanel.attr('aria-hidden', 'false');

            toggleLink.attr('aria-expanded', 'true');

            event.stopPropagation();

            $(document).on('click.mod_assign_grading_navigation', this._checkClickOutsideConfigureFilters.bind(this));

        }

    };

    /**

     * Reset table preferences.

     *

     * @private

     * @method _toggleResetTable

     */

    GradingNavigation.prototype._toggleResetTable = function() {

        let url = new URL(window.location);

        url.searchParams.set('treset', '1');

        window.location.href = url;

    };

    /**

     * Change to the previous user in the grading list.

     *

     * @private

     * @method _handlePreviousUser

     * @param {Event} e

     */

    GradingNavigation.prototype._handlePreviousUser = function(e) {

        e.preventDefault();

        var select = this._region.find('[data-action=change-user]');

        var currentUserId = select.attr('data-selected');

        var i = 0;

        var currentIndex = 0;

        for (i = 0; i < this._filteredUsers.length; i++) {

            if (this._filteredUsers[i].id == currentUserId) {

                currentIndex = i;

                break;

            }

        }

        var count = this._filteredUsers.length;

        var newIndex = (currentIndex - 1);

        if (newIndex < 0) {

            newIndex = count - 1;

        }

        if (count) {

            this._selectUserById(this._filteredUsers[newIndex].id);

        }

    };

    /**

     * Change to the next user in the grading list.

     *

     * @param {Event} e

     * @param {Boolean} saved Has the form already been saved? Skips checking for changes if true.

     */

    GradingNavigation.prototype._handleNextUser = function(e, saved) {

        e.preventDefault();

        var select = this._region.find('[data-action=change-user]');

        var currentUserId = select.attr('data-selected');

        var i = 0;

        var currentIndex = 0;

        for (i = 0; i < this._filteredUsers.length; i++) {

            if (this._filteredUsers[i].id == currentUserId) {

                currentIndex = i;

                break;

            }

        }

        var count = this._filteredUsers.length;

        var newIndex = (currentIndex + 1) % count;

        if (saved && count) {

            // If we've already saved the grade, skip checking if we've made any changes.

            var userid = this._filteredUsers[newIndex].id;

            var useridnumber = parseInt(userid, 10);

            select.attr('data-selected', userid);

            if (!isNaN(useridnumber) && useridnumber > 0) {

                $(document).trigger('user-changed', userid);

            }

        } else if (count) {

            this._selectUserById(this._filteredUsers[newIndex].id);

        }

    };

    /**

     * Set count string. This method only sets the value for the last time it was ever called to deal

     * with promises that return in a non-predictable order.

     *

     * @private

     * @method _setCountString

     * @param {Number} x

     * @param {Number} y

     */

    GradingNavigation.prototype._setCountString = function(x, y) {

        var updateNumber = 0;

        this._lastXofYUpdate++;

        updateNumber = this._lastXofYUpdate;

        var param = {x: x, y: y};

        str.get_string('xofy', 'mod_assign', param).done(function(s) {

            if (updateNumber == this._lastXofYUpdate) {

                this._region.find('[data-region="user-count-summary"]').text(s);

            }

        }.bind(this)).fail(notification.exception);

    };

    /**

     * Rebuild the x of y string.

     *

     * @private

     * @method _refreshCount

     */

    GradingNavigation.prototype._refreshCount = function() {

        var select = this._region.find('[data-action=change-user]');

        var userid = select.attr('data-selected');

        var i = 0;

        var currentIndex = 0;

        if (isNaN(userid) || userid <= 0) {

            this._region.find('[data-region="user-count"]').hide();

        } else {

            this._region.find('[data-region="user-count"]').show();

            for (i = 0; i < this._filteredUsers.length; i++) {

                if (this._filteredUsers[i].id == userid) {

                    currentIndex = i;

                    break;

                }

            }

            var count = this._filteredUsers.length;

            if (count) {

                currentIndex += 1;

            }

            this._setCountString(currentIndex, count);

            // Update window URL

            if (currentIndex > 0) {

                var url = new URL(window.location);

                if (parseInt(url.searchParams.get('blindid')) > 0) {

                    var newid = this._filteredUsers[currentIndex - 1].recordid;

                    url.searchParams.set('blindid', newid);

                } else {

                    url.searchParams.set('userid', userid);

                }

                // We do this so a browser refresh will return to the same user.

                window.history.replaceState({}, "", url);

            }

        }

    };

    /**

     * Respond to a user-changed event by updating the selector.

     *

     * @private

     * @method _refreshSelector

     * @param {Event} event

     * @param {String} userid

     */

    GradingNavigation.prototype._refreshSelector = function(event, userid) {

        var select = this._region.find('[data-action=change-user]');

        userid = parseInt(userid, 10);

        if (!isNaN(userid) && userid > 0) {

            select.attr('data-selected', userid);

        }

        this._refreshCount();

    };

    /**

     * Trigger the next user event depending on the number of filtered users

     *

     * @private

     * @method _triggerNextUserEvent

     */

    GradingNavigation.prototype._triggerNextUserEvent = function() {

        if (this._filteredUsers.length > 1) {

            $(document).trigger('next-user', {nextUserId: null, nextUser: true});

        } else {

            $(document).trigger('next-user', {nextUser: false});

        }

    };

    /**

     * Change to a different user in the grading list.

     *

     * @private

     * @method _handleChangeUser

     */

    GradingNavigation.prototype._handleChangeUser = function() {

        var select = this._region.find('[data-action=change-user]');

        var userid = parseInt(select.val(), 10);

        if (this._isLoading) {

            return;

        }

        if (checker.checkFormForChanges('[data-region="grade-panel"] .gradeform')) {

            // Form has changes, so we need to confirm before switching users.

            str.get_strings([

                {key: 'unsavedchanges', component: 'mod_assign'},

                {key: 'unsavedchangesquestion', component: 'mod_assign'},

                {key: 'saveandcontinue', component: 'mod_assign'},

                {key: 'cancel', component: 'core'},

            ]).done(function(strs) {

                notification.confirm(strs[0], strs[1], strs[2], strs[3], function() {

                    $(document).trigger('save-changes', userid);

                });

            });

        } else {

            if (!isNaN(userid) && userid > 0) {

                select.attr('data-selected', userid);

                $(document).trigger('user-changed', userid);

            }

        }

    };

    return GradingNavigation;

});