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✏️ Editing: moodle-mod_quiz-dragdrop.js

YUI.add('moodle-mod_quiz-dragdrop', function (Y, NAME) {

/* eslint-disable no-unused-vars */
/**
 * Drag and Drop for Quiz sections and slots.
 *
 * @module moodle-mod-quiz-dragdrop
 */

initializer: function() {
        // Set group for parent class
        this.groups = [CSS.SECTIONDRAGGABLE];
        this.samenodeclass = 'section';
        this.parentnodeclass = 'slots';

// Check if we are in single section mode
        if (Y.Node.one('.' + CSS.JUMPMENU)) {
            return false;
        }
        // Initialise sections dragging
        this.sectionlistselector = 'li.section';
        if (this.sectionlistselector) {
            this.sectionlistselector = '.' + CSS.COURSECONTENT + ' ' + this.sectionlistselector;

this.setup_for_section(this.sectionlistselector);

// Make each li element in the lists of sections draggable
            var del = new Y.DD.Delegate({
                container: '.' + CSS.COURSECONTENT,
                nodes: '.' + CSS.SECTIONDRAGGABLE,
                target: true,
                handles: ['.' + CSS.LEFT],
                dragConfig: {groups: this.groups}
            });
            del.dd.plug(Y.Plugin.DDProxy, {
                // Don't move the node at the end of the drag
                moveOnEnd: false
            });
            del.dd.plug(Y.Plugin.DDConstrained, {
                // Keep it inside the .mod-quiz-edit-content
                constrain: '#' + CSS.PAGECONTENT,
                stickY: true
            });
            del.dd.plug(Y.Plugin.DDWinScroll);
        }
    },

/**
     * Apply dragdrop features to the specified selector or node that refers to section(s)
     *
     * @method setup_for_section
     * @param {String} baseselector The CSS selector or node to limit scope to
     */
    setup_for_section: function(baseselector) {
        Y.Node.all(baseselector).each(function(sectionnode) {
            // Determine the section ID
            var sectionid = Y.Moodle.core_course.util.section.getId(sectionnode);

// We skip the top section as it is not draggable
            if (sectionid > 0) {
                // Remove move icons
                var movedown = sectionnode.one('.' + CSS.RIGHT + ' a.' + CSS.MOVEDOWN);
                var moveup = sectionnode.one('.' + CSS.RIGHT + ' a.' + CSS.MOVEUP);

// Add dragger icon
                var title = M.util.get_string('movesection', 'moodle', sectionid);
                var cssleft = sectionnode.one('.' + CSS.LEFT);

if ((movedown || moveup) && cssleft) {
                    cssleft.setStyle('cursor', 'move');
                    cssleft.appendChild(this.get_drag_handle(title, CSS.SECTIONHANDLE, 'icon', true));

if (moveup) {
                        moveup.remove();
                    }
                    if (movedown) {
                        movedown.remove();
                    }

// This section can be moved - add the class to indicate this to Y.DD.
                    sectionnode.addClass(CSS.SECTIONDRAGGABLE);
                }
            }
        }, this);
    },

/*
     * Drag-dropping related functions
     */
    drag_start: function(e) {
        // Get our drag object
        var drag = e.target;
        // Creat a dummy structure of the outer elemnents for clean styles application
        var containernode = Y.Node.create('<ul class="slots"></ul>');
        var sectionnode = Y.Node.create('<ul class="section"></ul>');
        sectionnode.setStyle('margin', 0);
        sectionnode.setContent(drag.get('node').get('innerHTML'));
        containernode.appendChild(sectionnode);
        drag.get('dragNode').setContent(containernode);
        drag.get('dragNode').addClass(CSS.COURSECONTENT);
    },

drag_dropmiss: function(e) {
        // Missed the target, but we assume the user intended to drop it
        // on the last last ghost node location, e.drag and e.drop should be
        // prepared by global_drag_dropmiss parent so simulate drop_hit(e).
        this.drop_hit(e);
    },

get_section_index: function(node) {
        var sectionlistselector = '.' + CSS.COURSECONTENT + ' li.section',
            sectionList = Y.all(sectionlistselector),
            nodeIndex = sectionList.indexOf(node),
            zeroIndex = sectionList.indexOf(Y.one('#section-0'));

return (nodeIndex - zeroIndex);
    },

drop_hit: function(e) {
        var drag = e.drag;

// Get references to our nodes and their IDs.
        var dragnode = drag.get('node'),
            dragnodeid = Y.Moodle.core_course.util.section.getId(dragnode),
            loopstart = dragnodeid,

dropnodeindex = this.get_section_index(dragnode),
            loopend = dropnodeindex;

if (dragnodeid === dropnodeindex) {
            return;
        }

if (loopstart > loopend) {
            // If we're going up, we need to swap the loop order
            // because loops can't go backwards.
            loopstart = dropnodeindex;
            loopend = dragnodeid;
        }

// Get the list of nodes.
        drag.get('dragNode').removeClass(CSS.COURSECONTENT);
        var sectionlist = Y.Node.all(this.sectionlistselector);

// Add a lightbox if it's not there.
        var lightbox = M.util.add_lightbox(Y, dragnode);

// Handle any variables which we must pass via AJAX.
        var params = {},
            pageparams = this.get('config').pageparams,
            varname;

for (varname in pageparams) {
            if (!pageparams.hasOwnProperty(varname)) {
                continue;
            }
            params[varname] = pageparams[varname];
        }

// Prepare request parameters
        params.sesskey = M.cfg.sesskey;
        params.courseid = this.get('courseid');
        params.quizid = this.get('quizid');
        params['class'] = 'section';
        params.field = 'move';
        params.id = dragnodeid;
        params.value = dropnodeindex;

// Perform the AJAX request.
        var uri = M.cfg.wwwroot + this.get('ajaxurl');
        Y.io(uri, {
            method: 'POST',
            data: params,
            on: {
                start: function() {
                    lightbox.show();
                },
                success: function(tid, response) {
                    // Update section titles, we can't simply swap them as
                    // they might have custom title
                    try {
                        var responsetext = Y.JSON.parse(response.responseText);
                        if (responsetext.error) {
                            new M.core.ajaxException(responsetext);
                        }
                        M.mod_quiz.edit.process_sections(Y, sectionlist, responsetext, loopstart, loopend);
                    } catch (e) {
                        // Ignore.
                    }

// Update all of the section IDs - first unset them, then set them
                    // to avoid duplicates in the DOM.
                    var index;

// Classic bubble sort algorithm is applied to the section
                    // nodes between original drag node location and the new one.
                    var swapped = false;
                    do {
                        swapped = false;
                        for (index = loopstart; index <= loopend; index++) {
                            if (Y.Moodle.core_course.util.section.getId(sectionlist.item(index - 1)) >
                                        Y.Moodle.core_course.util.section.getId(sectionlist.item(index))) {
                                // Swap section id.
                                var sectionid = sectionlist.item(index - 1).get('id');
                                sectionlist.item(index - 1).set('id', sectionlist.item(index).get('id'));
                                sectionlist.item(index).set('id', sectionid);

// See what format needs to swap.
                                M.mod_quiz.edit.swap_sections(Y, index - 1, index);

// Update flag.
                                swapped = true;
                            }
                        }
                        loopend = loopend - 1;
                    } while (swapped);

window.setTimeout(function() {
                        lightbox.hide();
                    }, 250);
                },

failure: function(tid, response) {
                    this.ajax_failure(response);
                    lightbox.hide();
                }
            },
            context: this
        });
    }

}, {
    NAME: 'mod_quiz-dragdrop-section',
    ATTRS: {
        courseid: {
            value: null
        },
        quizid: {
            value: null
        },
        ajaxurl: {
            value: 0
        },
        config: {
            value: 0
        }
    }
});

M.mod_quiz = M.mod_quiz || {};
M.mod_quiz.init_section_dragdrop = function(params) {
    new DRAGSECTION(params);
};
/**
 * Resource drag and drop.
 *
 * @class M.course.dragdrop.resource
 * @constructor
 * @extends M.core.dragdrop
 */
var DRAGRESOURCE = function() {
    DRAGRESOURCE.superclass.constructor.apply(this, arguments);
};
Y.extend(DRAGRESOURCE, M.core.dragdrop, {
    initializer: function() {
        // Set group for parent class
        this.groups = ['resource'];
        this.samenodeclass = CSS.ACTIVITY;
        this.parentnodeclass = CSS.SECTION;

this.samenodelabel = {
            identifier: 'dragtoafter',
            component: 'quiz'
        };
        this.parentnodelabel = {
            identifier: 'dragtostart',
            component: 'quiz'
        };

// Go through all sections
        this.setup_for_section();

// Initialise drag & drop for all resources/activities
        var nodeselector = 'li.' + CSS.ACTIVITY;
        var del = new Y.DD.Delegate({
            container: '.' + CSS.COURSECONTENT,
            nodes: nodeselector,
            target: true,
            handles: ['.' + CSS.EDITINGMOVE],
            dragConfig: {groups: this.groups}
        });
        del.dd.plug(Y.Plugin.DDProxy, {
            // Don't move the node at the end of the drag
            moveOnEnd: false,
            cloneNode: true
        });
        del.dd.plug(Y.Plugin.DDConstrained, {
            // Keep it inside the .mod-quiz-edit-content
            constrain: '#' + CSS.SLOTS
        });
        del.dd.plug(Y.Plugin.DDWinScroll);

M.mod_quiz.quizbase.register_module(this);
        M.mod_quiz.dragres = this;
    },

/**
     * Apply dragdrop features to the specified selector or node that refers to section(s)
     *
     * @method setup_for_section
     * @param {String} baseselector The CSS selector or node to limit scope to
     */
    setup_for_section: function() {
        Y.Node.all('.mod-quiz-edit-content ul.slots ul.section').each(function(resources) {
            resources.setAttribute('data-draggroups', this.groups.join(' '));
            // Define empty ul as droptarget, so that item could be moved to empty list
            new Y.DD.Drop({
                node: resources,
                groups: this.groups,
                padding: '20 0 20 0'
            });

// Initialise each resource/activity in this section
            this.setup_for_resource('li.activity');
        }, this);
    },

/**
     * Apply dragdrop features to the specified selector or node that refers to resource(s)
     *
     * @method setup_for_resource
     * @param {String} baseselector The CSS selector or node to limit scope to
     */
    setup_for_resource: function(baseselector) {
        Y.Node.all(baseselector).each(function(resourcesnode) {
            // Replace move icons
            var move = resourcesnode.one('a.' + CSS.EDITINGMOVE);
            if (move) {
                var resourcedraghandle = this.get_drag_handle(M.util.get_string('move', 'moodle'),
                                                              CSS.EDITINGMOVE, CSS.ICONCLASS, true);
                move.replace(resourcedraghandle);
            }
        }, this);
    },

drag_start: function(e) {
        // Get our drag object
        var drag = e.target;
        drag.get('dragNode').setContent(drag.get('node').get('innerHTML'));
        drag.get('dragNode').all('.icon').setStyle('vertical-align', 'baseline');
    },

drag_dropmiss: function(e) {
        // Missed the target, but we assume the user intended to drop it
        // on the last ghost node location, e.drag and e.drop should be
        // prepared by global_drag_dropmiss parent so simulate drop_hit(e).
        this.drop_hit(e);
    },

drop_hit: function(e) {
        var drag = e.drag;
        // Get a reference to our drag node
        var dragnode = drag.get('node');

// Add spinner if it not there
        var actionarea = dragnode.one(CSS.ACTIONAREA);
        var spinner = M.util.add_spinner(Y, actionarea);

var params = {};

// Handle any variables which we must pass back through to
        var pageparams = this.get('config').pageparams;
        var varname;
        for (varname in pageparams) {
            params[varname] = pageparams[varname];
        }

// Prepare request parameters
        params.sesskey = M.cfg.sesskey;
        params.courseid = this.get('courseid');
        params.quizid = this.get('quizid');
        params['class'] = 'resource';
        params.field = 'move';
        params.id = Number(Y.Moodle.mod_quiz.util.slot.getId(dragnode));
        params.sectionId = Y.Moodle.core_course.util.section.getId(dragnode.ancestor('li.section', true));

var previousslot = dragnode.previous(SELECTOR.SLOT);
        if (previousslot) {
            params.previousid = Number(Y.Moodle.mod_quiz.util.slot.getId(previousslot));
        }

var previouspage = dragnode.previous(SELECTOR.PAGE);
        if (previouspage) {
            params.page = Number(Y.Moodle.mod_quiz.util.page.getId(previouspage));
        }

// Do AJAX request
        var uri = M.cfg.wwwroot + this.get('ajaxurl');

Y.io(uri, {
            method: 'POST',
            data: params,
            on: {
                start: function() {
                    this.lock_drag_handle(drag, CSS.EDITINGMOVE);
                    spinner.show();
                },
                success: function(tid, response) {
                    var responsetext = Y.JSON.parse(response.responseText);
                    var params = {element: dragnode, visible: responsetext.visible};
                    M.mod_quiz.quizbase.invoke_function('set_visibility_resource_ui', params);
                    this.unlock_drag_handle(drag, CSS.EDITINGMOVE);
                    window.setTimeout(function() {
                        spinner.hide();
                    }, 250);
                    M.mod_quiz.resource_toolbox.reorganise_edit_page();
                },
                failure: function(tid, response) {
                    this.ajax_failure(response);
                    this.unlock_drag_handle(drag, CSS.SECTIONHANDLE);
                    spinner.hide();
                    window.location.reload(true);
                }
            },
            context: this
        });
    },

global_drop_over: function(e) {
        // Overriding parent method so we can stop the slots being dragged before the first page node.

// Check that drop object belong to correct group.
        if (!e.drop || !e.drop.inGroup(this.groups)) {
            return;
        }

// Get a reference to our drag and drop nodes.
        var drag = e.drag.get('node'),
            drop = e.drop.get('node');

// Save last drop target for the case of missed target processing.
        this.lastdroptarget = e.drop;

// Are we dropping within the same parent node?
        if (drop.hasClass(this.samenodeclass)) {
            var where;

if (this.goingup) {
                where = "before";
            } else {
                where = "after";
            }

drop.insert(drag, where);
        } else if ((drop.hasClass(this.parentnodeclass) || drop.test('[data-droptarget="1"]')) && !drop.contains(drag)) {
            // We are dropping on parent node and it is empty
            if (this.goingup) {
                drop.append(drag);
            } else {
                drop.prepend(drag);
            }
        }
        this.drop_over(e);
    }
}, {
    NAME: 'mod_quiz-dragdrop-resource',
    ATTRS: {
        courseid: {
            value: null
        },
        quizid: {
            value: null
        },
        ajaxurl: {
            value: 0
        },
        config: {
            value: 0
        }
    }
});

M.mod_quiz = M.mod_quiz || {};
M.mod_quiz.init_resource_dragdrop = function(params) {
    new DRAGRESOURCE(params);
};

}, '@VERSION@', {
    "requires": [
        "base",
        "node",
        "io",
        "dom",
        "dd",
        "dd-scroll",
        "moodle-core-dragdrop",
        "moodle-core-notification",
        "moodle-mod_quiz-quizbase",
        "moodle-mod_quiz-util-base",
        "moodle-mod_quiz-util-page",
        "moodle-mod_quiz-util-slot",
        "moodle-course-util"
    ]
});

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