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/>.

/**

 * Client-side JavaScript for group management interface.

 * @copyright vy-shane AT moodle.com

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

 * @package core_group

 */

/**

 * Class UpdatableGroupsCombo

 */

function UpdatableGroupsCombo(wwwRoot, courseId) {

    this.wwwRoot = wwwRoot;

    this.courseId = courseId;

    this.connectCallback = {

        success: function(o) {

            if (o.responseText !== undefined) {

                var groupsComboEl = document.getElementById("groups");

                var membersComboEl = document.getElementById("members");

                if (membersComboEl) {

                    // Clear the members list box.

                    while (membersComboEl.firstChild) {

                        membersComboEl.removeChild(membersComboEl.firstChild);

                    }

                }

                if (groupsComboEl && o.responseText) {

                    var groups = eval("("+o.responseText+")");

                    // Populate the groups list box.

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

                        var optionEl = document.createElement("option");

                        optionEl.setAttribute("value", groups[i].id);

                        optionEl.title = groups[i].name;

                        optionEl.innerHTML = groups[i].name;

                        groupsComboEl.appendChild(optionEl);

                    }

                }

            }

            // Remove the loader gif image.

            removeLoaderImgs("groupsloader", "groupslabel");

        },

        failure: function(o) {

            removeLoaderImgs("membersloader", "memberslabel");

            this.currentTransId = null;

        }

    };

}

/**

 * Class UpdatableMembersCombo

 */

function UpdatableMembersCombo(wwwRoot, courseId) {

    this.wwwRoot = wwwRoot;

    this.courseId = courseId;

    this.connectCallback = {

        success: function(t, o) {

            if (o.responseText !== undefined) {

                var selectEl = document.getElementById("members");

                if (selectEl && o.responseText) {

                    var roles = eval("("+o.responseText+")");

                    // Clear the members list box.

                    if (selectEl) {

                        while (selectEl.firstChild) {

                            selectEl.removeChild(selectEl.firstChild);

                        }

                    }

                    // Populate the members list box.

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

                        var optgroupEl = document.createElement("optgroup");

                        optgroupEl.setAttribute("label",roles[i].name);

                        for(var j=0; j<roles[i].users.length; j++) {

                            var optionEl = document.createElement("option");

                            optionEl.setAttribute("value", roles[i].users[j].id);

                            optionEl.title = roles[i].users[j].name;

                            optionEl.innerHTML = Y.Escape.html(roles[i].users[j].name);

                            optgroupEl.appendChild(optionEl);

                        }

                        selectEl.appendChild(optgroupEl);

                    }

                }

            }

            // Remove the loader gif image.

            removeLoaderImgs("membersloader", "memberslabel");

        },

        failure: function() {

            removeLoaderImgs("membersloader", "memberslabel");

        }

    };

    // Hide the updatemembers input since AJAX will take care of this.

    var updatemembers = Y.one('#updatemembers');

    if (updatemembers) {

        updatemembers.hide();

    }

}

/**

 * When a group is selected, we need to update the members.

 * The Add/Remove Users button also needs to be disabled/enabled

 * depending on whether or not a group is selected

 */

UpdatableMembersCombo.prototype.refreshMembers = function () {

    // Get group selector and check selection type

    var selectEl = document.getElementById("groups");

    var selectionCount=0,groupId=0;

    if( selectEl ) {

        for (var i = 0; i < selectEl.options.length; i++) {

            if(selectEl.options[i].selected) {

                selectionCount++;

                if(!groupId) {

                    groupId=selectEl.options[i].value;

                }

            }

        }

    }

    var singleSelection=selectionCount == 1;

    // Add the loader gif image (we only load for single selections)

    if(singleSelection) {

        createLoaderImg("membersloader", "memberslabel", this.wwwRoot);

    }

    // Update the label.

    var spanEl = document.getElementById("thegroup");

    if (singleSelection) {

        spanEl.innerHTML = selectEl.options[selectEl.selectedIndex].title;

    } else {

        spanEl.innerHTML = ' ';

    }

    // Clear the members list box.

    selectEl = document.getElementById("members");

    if (selectEl) {

        while (selectEl.firstChild) {

            selectEl.removeChild(selectEl.firstChild);

        }

    }

    document.getElementById("showaddmembersform").disabled = !singleSelection;

    document.getElementById("showeditgroupsettingsform").disabled = !singleSelection;

    document.getElementById("deletegroup").disabled = selectionCount == 0;

    if(singleSelection) {

        var sUrl = this.wwwRoot + "/group/index.php?id=" + this.courseId + "&group=" + groupId + "&action=ajax_getmembersingroup";

        var self = this;

        YUI().use('io', function (Y) {

            Y.io(sUrl, {

                method: 'GET',

                context: this,

                on: self.connectCallback

            });

        });

    }

};

var createLoaderImg = function (elClass, parentId, wwwRoot) {

    var parentEl = document.getElementById(parentId);

    if (!parentEl) {

        return false;

    }

    if (document.getElementById("loaderImg")) {

        // A loader image already exists.

        return false;

    }

    var loadingImg = document.createElement("img");

    loadingImg.setAttribute("src", M.util.image_url('/i/ajaxloader', 'moodle'));

    loadingImg.setAttribute("class", elClass);

    loadingImg.setAttribute("alt", "Loading");

    loadingImg.setAttribute("id", "loaderImg");

    parentEl.appendChild(loadingImg);

    return true;

};

var removeLoaderImgs = function (elClass, parentId) {

    var parentEl = document.getElementById(parentId);

    if (parentEl) {

        var loader = document.getElementById("loaderImg");

        if (loader) {

            parentEl.removeChild(loader);

        }

    }

};

/**

 * Updates the current groups information shown about a user when a user is selected.

 *

 * @global {Array} userSummaries

 *      userSummaries is added to the page via /user/selector/lib.php - group_non_members_selector::print_user_summaries()

 *      as a global that can be used by this function.

 */

function updateUserSummary() {

    var selectEl = document.getElementById('addselect'),

        summaryDiv = document.getElementById('group-usersummary'),

        length = selectEl.length,

        selectCnt = 0,

        selectIdx = -1,

        i;

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

        if (selectEl.options[i].selected) {

            selectCnt++;

            selectIdx = i;

        }

    }

    if (selectCnt == 1 && userSummaries[selectIdx]) {

        summaryDiv.innerHTML = userSummaries[selectIdx];

    } else {

        summaryDiv.innerHTML = '';

    }

    return true;

}

function init_add_remove_members_page(Y) {

    var add = Y.one('#add');

    var addselect = M.core_user.get_user_selector('addselect');

    add.set('disabled', addselect.is_selection_empty());

    addselect.on('user_selector:selectionchanged', function(isempty) {

        add.set('disabled', isempty);

    });

    var remove = Y.one('#remove');

    var removeselect = M.core_user.get_user_selector('removeselect');

    remove.set('disabled', removeselect.is_selection_empty());

    removeselect.on('user_selector:selectionchanged', function(isempty) {

        remove.set('disabled', isempty);

    });

    addselect = document.getElementById('addselect');

    addselect.onchange = updateUserSummary;

}