Sindbad~EG File Manager

YUI.add('moodle-mod_feedback-dragdrop', function(Y) {
    var DRAGDROPNAME = 'mod_feedback_dragdrop';
    var CSS = {
        DRAGAREA: '#feedback_dragarea',
        DRAGITEMCLASS: 'feedback_itemlist',
        DRAGITEM: 'div.feedback_itemlist',
        DRAGLIST: '#feedback_dragarea form',
        DRAGHANDLE: 'itemhandle'
    };

    var DRAGDROP = function() {
        DRAGDROP.superclass.constructor.apply(this, arguments);
    };

    Y.extend(DRAGDROP, M.core.dragdrop, {

        initializer : function(params) {
            //Static Vars
            this.cmid = params.cmid;
            this.goingUp = false, lastY = 0;

            var groups = ['feedbackitem'];

            var handletitle = M.util.get_string('move_item', 'feedback');

            //Get the list of li's in the lists and add the drag handle.
            basenode = Y.Node.one(CSS.DRAGLIST);
            listitems = basenode.all(CSS.DRAGITEM).each(function(v) {
                var item_id = this.get_node_id(v.get('id')); //Get the id of the feedback item.
                var mydraghandle = this.get_drag_handle(handletitle, CSS.DRAGHANDLE, 'icon');
                v.append(mydraghandle); // Insert the new handle into the item box.
            }, this);

            //We use a delegate to make all items draggable
            var del = new Y.DD.Delegate({
                container: CSS.DRAGLIST,
                nodes: CSS.DRAGITEM,
                target: {
                    padding: '0 0 0 20'
                },
                handles: ['.' + CSS.DRAGHANDLE],
                dragConfig: {groups: groups}
            });

            //Add plugins to the delegate
            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 .course-content
                constrain: CSS.DRAGAREA
            });
            del.dd.plug(Y.Plugin.DDWinScroll);

            //Listen for all drop:over events
            del.on('drop:over', this.drop_over_handler, this);
            //Listen for all drag:drag events
            del.on('drag:drag',  this.drag_drag_handler, this);
            //Listen for all drag:start events
            del.on('drag:start',  this.drag_start_handler, this);
            //Listen for a drag:end events
            del.on('drag:end',  this.drag_end_handler, this);
            //Listen for all drag:drophit events
            del.on('drag:drophit',  this.drag_drophit_handler, this);
            //Listen for all drag:dropmiss events
            del.on('drag:dropmiss',  this.drag_dropmiss_handler, this);

            //Create targets for drop.
            var droparea = Y.Node.one(CSS.DRAGLIST);
            var tar = new Y.DD.Drop({
                groups: groups,
                node: droparea
            });

        },

        /**
         * Handles the drop:over event.
         *
         * @param e the event
         * @return void
         */
        drop_over_handler : function(e) {
            //Get a reference to our drag and drop nodes
            var drag = e.drag.get('node'),
                drop = e.drop.get('node');

            //Are we dropping on an li node?
            if (drop.hasClass(CSS.DRAGITEMCLASS)) {
                //Are we not going up?
                if (!this.goingUp) {
                    drop = drop.get('nextSibling');
                }
                //Add the node to this list
                e.drop.get('node').get('parentNode').insertBefore(drag, drop);
                //Resize this nodes shim, so we can drop on it later.
                e.drop.sizeShim();
            }
        },

        /**
         * Handles the drag:drag event.
         *
         * @param e the event
         * @return void
         */
        drag_drag_handler : function(e) {
            //Get the last y point
            var y = e.target.lastXY[1];
            //Is it greater than the lastY var?
            if (y < this.lastY) {
                //We are going up
                this.goingUp = true;
            } else {
                //We are going down.
                this.goingUp = false;
            }
            //Cache for next check
            this.lastY = y;
        },

        /**
         * Handles the drag:start event.
         *
         * @param e the event
         * @return void
         */
        drag_start_handler : function(e) {
            //Get our drag object
            var drag = e.target;

            //Set some styles here
            drag.get('node').addClass('drag_target_active');
            drag.get('dragNode').set('innerHTML', drag.get('node').get('innerHTML'));
            drag.get('dragNode').addClass('drag_item_active');
            drag.get('dragNode').setStyles({
                borderColor: drag.get('node').getStyle('borderColor'),
                backgroundColor: drag.get('node').getStyle('backgroundColor')
            });
        },

        /**
         * Handles the drag:end event.
         *
         * @param e the event
         * @return void
         */
        drag_end_handler : function(e) {
            var drag = e.target;
            //Put our styles back
            drag.get('node').removeClass('drag_target_active');
        },

        /**
         * Handles the drag:drophit event.
         *
         * @param e the event
         * @return void
         */
        drag_drophit_handler : function(e) {
            var drop = e.drop.get('node'),
                drag = e.drag.get('node');
            dragnode = Y.one(drag);
            if (!drop.hasClass(CSS.DRAGITEMCLASS)) {
                if (!drop.contains(drag)) {
                    drop.appendChild(drag);
                }
                var childElement;
                var elementId;
                var elements = [];
                drop.all(CSS.DRAGITEM).each(function(v) {
                    childElement = v.one('.felement')?.one('[id^="feedback_item_"]');
                    if (childElement) {
                        elementId = this.get_node_id(childElement.get('id'));
                        if (elements.indexOf(elementId) == -1) {
                            elements.push(elementId);
                        }
                    }
                }, this);
                var spinner = M.util.add_spinner(Y, dragnode);
                this.save_item_order(this.cmid, elements.toString(), spinner);
           }
        },

        /**
         * Save the new item order.
         *
         * @param cmid the coursemodule id
         * @param itemorder A comma separated list with item ids
         * @param spinner The spinner icon shown while saving
         * @return void
         */
        save_item_order : function(cmid, itemorder, spinner) {

            Y.io(M.cfg.wwwroot + '/mod/feedback/ajax.php', {
                //The needed paramaters
                data: {action: 'saveitemorder',
                       id: cmid,
                       itemorder: itemorder,
                       sesskey: M.cfg.sesskey
                },

                timeout: 5000, //5 seconds for timeout I think it is enough.

                //Define the events.
                on: {
                    start : function(transactionid) {
                        spinner.show();
                    },
                    success : function(transactionid, xhr) {
                        var response = xhr.responseText;
                        var ergebnis = Y.JSON.parse(response);
                        window.setTimeout(function(e) {
                            spinner.hide();
                        }, 250);
                        require(['core/notification', 'core/str', 'core/toast'], function(Notification, Strings, Toast) {
                            Strings.get_string('changessaved', 'core').then(function(saveString) {
                                return Toast.add(saveString);
                            }).catch(Notification.exception);
                        });
                    },
                    failure : function(transactionid, xhr) {
                        var msg = {
                            name : xhr.status+' '+xhr.statusText,
                            message : xhr.responseText
                        };
                        return new M.core.exception(msg);
                        //~ this.ajax_failure(xhr);
                        spinner.hide();
                    }
                },
                context:this
            });
        },

        /**
         * Returns the numeric id from the dom id of an item.
         *
         * @param id The dom id, f.g.: feedback_item_22
         * @return int
         */
        get_node_id : function(id) {
            return Number(id.replace(/^.*feedback_item_/i, ''));
        }

    }, {
        NAME : DRAGDROPNAME,
        ATTRS : {
            cmid : {
                value : 0
            }
        }

    });

    M.mod_feedback = M.mod_feedback || {};
    M.mod_feedback.init_dragdrop = function(params) {
        return new DRAGDROP(params);
    }

}, '@VERSION@', {
    requires:['io', 'json-parse', 'dd-constrain', 'dd-proxy', 'dd-drop', 'dd-scroll', 'moodle-core-dragdrop', 'moodle-core-notification']
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