60 lines
2.5 KiB
JavaScript
60 lines
2.5 KiB
JavaScript
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import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';
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import { is } from 'bpmn-js/lib/util/ModelUtil';
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import { findDataObjects } from './DataObjectHelpers';
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var HIGH_PRIORITY = 1500;
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/**
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* This Command Interceptor functions like the BpmnUpdator in BPMN.js - It hooks into events
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* from Diagram.js and updates the underlying BPMN model accordingly.
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*
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* This handles some special cases we want to handle for DataObjects and DataObjectReferences,
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* for instance:
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* 1) Use existing data objects if possible when creating a new reference (don't create new objects each time)
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* 2) Don't automatically delete a data object when you delete the reference - unless all references are removed.
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* 3) Update the name of the DataObjectReference to match the id of the DataObject.
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* 4) Don't allow someone to move a DataObjectReference from one process to another process.
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*/
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export default class DataObjectInterceptor extends CommandInterceptor {
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constructor(eventBus, bpmnFactory, bpmnUpdater) {
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super(eventBus);
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/**
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* For DataObjectReferences only ...
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* Prevent this from calling the CreateDataObjectBehavior in BPMN-js, as it will
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* attempt to crete a dataObject immediately. We can't create the dataObject until
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* we know where it is placed - as we want to reuse data objects of the parent when
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* possible */
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this.preExecute([ 'shape.create' ], HIGH_PRIORITY, function(event) {
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const context = event.context, shape = context.shape;
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if (is(shape, 'bpmn:DataObjectReference') && shape.type !== 'label') {
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event.stopPropagation();
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}
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});
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/**
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* Don't just create a new data object, use the first existing one if it already exists
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*/
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this.executed([ 'shape.create' ], HIGH_PRIORITY, function(event) {
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const context = event.context, shape = context.shape;
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if (is(shape, 'bpmn:DataObjectReference') && shape.type !== 'label') {
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let process = shape.parent.businessObject;
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let existingDataObjects = findDataObjects(process);
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let dataObject;
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if (existingDataObjects.length > 0) {
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dataObject = existingDataObjects[0];
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} else {
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dataObject = bpmnFactory.create('bpmn:DataObject');
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}
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// Update the name of the reference to match the data object's id.
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shape.businessObject.name = dataObject.id;
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// set the reference to the DataObject
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shape.businessObject.dataObjectRef = dataObject;
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}
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});
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}
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}
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DataObjectInterceptor.$inject = [ 'eventBus', 'bpmnFactory', 'bpmnUpdater' ];
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