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| import {
forEach,
find,
matchPattern
} from 'min-dash';
import inherits from 'inherits';
import CommandInterceptor from 'diagram-js/lib/command/CommandInterceptor';
import { is } from '../../../util/ModelUtil';
export default function ReplaceConnectionBehavior(eventBus, modeling, bpmnRules) {
CommandInterceptor.call(this, eventBus);
function fixConnection(connection) {
var source = connection.source,
target = connection.target,
parent = connection.parent;
// do not do anything if connection
// is already deleted (may happen due to other
// behaviors plugged-in before)
if (!parent) {
return;
}
var replacementType,
remove;
/**
* Check if incoming or outgoing connections
* can stay or could be substituted with an
* appropriate replacement.
*
* This holds true for SequenceFlow <> MessageFlow.
*/
if (is(connection, 'bpmn:SequenceFlow')) {
if (!bpmnRules.canConnectSequenceFlow(source, target)) {
remove = true;
}
if (bpmnRules.canConnectMessageFlow(source, target)) {
replacementType = 'bpmn:MessageFlow';
}
}
// transform message flows into sequence flows, if possible
if (is(connection, 'bpmn:MessageFlow')) {
if (!bpmnRules.canConnectMessageFlow(source, target)) {
remove = true;
}
if (bpmnRules.canConnectSequenceFlow(source, target)) {
replacementType = 'bpmn:SequenceFlow';
}
}
if (is(connection, 'bpmn:Association') && !bpmnRules.canConnectAssociation(source, target)) {
remove = true;
}
// remove invalid connection,
// unless it has been removed already
if (remove) {
modeling.removeConnection(connection);
}
// replace SequenceFlow <> MessageFlow
if (replacementType) {
modeling.connect(source, target, {
type: replacementType,
waypoints: connection.waypoints.slice()
});
}
}
this.postExecuted('elements.move', function(context) {
var closure = context.closure,
allConnections = closure.allConnections;
forEach(allConnections, fixConnection);
}, true);
this.postExecuted([
'connection.reconnectStart',
'connection.reconnectEnd'
], function(event) {
var connection = event.context.connection;
fixConnection(connection);
});
this.postExecuted('element.updateProperties', function(event) {
var context = event.context,
properties = context.properties,
element = context.element,
businessObject = element.businessObject,
connection;
// remove condition expression when morphing to default flow
if (properties.default) {
connection = find(
element.outgoing,
matchPattern({ id: element.businessObject.default.id })
);
Eif (connection) {
modeling.updateProperties(connection, { conditionExpression: undefined });
}
}
// remove default property from source when morphing to conditional flow
if (properties.conditionExpression && businessObject.sourceRef.default === businessObject) {
modeling.updateProperties(element.source, { default: undefined });
}
});
}
inherits(ReplaceConnectionBehavior, CommandInterceptor);
ReplaceConnectionBehavior.$inject = [
'eventBus',
'modeling',
'bpmnRules'
];
|