'use strict';
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var forEach = require('lodash/forEach');
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/**
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* A handler that implements a BPMN 2.0 property update
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* for business object lists which are not represented in the
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* diagram.
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*
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* This is useful in the context of the properties panel in
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* order to update child elements of elements visible in
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* the diagram.
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*
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* Example: perform an update of a specific event definition
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* of an intermediate event.
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*
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* @class
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* @constructor
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*/
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function UpdateBusinessObjectListHandler(elementRegistry, bpmnFactory) {
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this._elementRegistry = elementRegistry;
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this._bpmnFactory = bpmnFactory;
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}
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UpdateBusinessObjectListHandler.$inject = [ 'elementRegistry', 'bpmnFactory' ];
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module.exports = UpdateBusinessObjectListHandler;
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function ensureNotNull(prop, name) {
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if (!prop) {
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throw new Error(name + 'required');
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}
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return prop;
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}
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// api /////////////////////////////////////////////
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/**
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* Updates a element under a provided parent.
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*/
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UpdateBusinessObjectListHandler.prototype.execute = function(context) {
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var currentObject = ensureNotNull(context.currentObject, 'currentObject'),
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propertyName = ensureNotNull(context.propertyName, 'propertyName'),
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updatedObjectList = context.updatedObjectList,
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objectsToRemove = context.objectsToRemove || [],
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objectsToAdd = context.objectsToAdd || [],
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changed = [ context.element], // this will not change any diagram-js elements
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referencePropertyName;
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if (context.referencePropertyName) {
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referencePropertyName = context.referencePropertyName;
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}
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var objectList = currentObject[propertyName];
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// adjust array reference in the parent business object
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context.previousList = currentObject[propertyName];
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if (updatedObjectList) {
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currentObject[propertyName] = updatedObjectList;
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} else {
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var listCopy = [];
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// remove all objects which should be removed
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forEach(objectList, function(object) {
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if (objectsToRemove.indexOf(object) == -1) {
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listCopy.push(object);
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}
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});
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// add all objects which should be added
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listCopy = listCopy.concat(objectsToAdd);
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// set property to new list
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if (listCopy.length > 0 || !referencePropertyName) {
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// as long as there are elements in the list update the list
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currentObject[propertyName] = listCopy;
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} else if (referencePropertyName) {
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// remove the list when it is empty
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var parentObject = currentObject.$parent;
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parentObject.set(referencePropertyName, undefined);
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}
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}
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context.changed = changed;
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// indicate changed on objects affected by the update
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return changed;
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};
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/**
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* Reverts the update
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*
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* @method CreateBusinessObjectListHandler#revert
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*
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* @param {Object} context
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*
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* @return {djs.mode.Base} the updated element
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*/
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UpdateBusinessObjectListHandler.prototype.revert = function(context) {
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var currentObject = context.currentObject,
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propertyName = context.propertyName,
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previousList = context.previousList,
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parentObject = currentObject.$parent;
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if (context.referencePropertyName) {
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parentObject.set(context.referencePropertyName, currentObject);
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}
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// remove new element
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currentObject.set(propertyName, previousList);
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return context.changed;
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};
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