fix(replace): add moddle extension for canCopyProperty

Related to zeebe-io/zeebe-modeler#248

lib/extension.js

@@ -0,0 +1,76 @@
+'use strict';
+
+var isFunction = require('min-dash').isFunction,
+    isObject = require('min-dash').isObject,
+    some = require('min-dash').some;
+
+var WILDCARD = '*';
+
+
+function ZeebeModdleExtension(eventBus) {
+
+  var self = this;
+
+  eventBus.on('moddleCopy.canCopyProperty', function(context) {
+    var property = context.property,
+        parent = context.parent;
+
+    return self.canCopyProperty(property, parent);
+  });
+}
+
+ZeebeModdleExtension.$inject = [ 'eventBus' ];
+
+ZeebeModdleExtension.prototype.canCopyProperty = function(property, parent) {
+
+  // check if property is allowed in parent
+  if (isObject(property) && !isAllowedInParent(property, parent)) {
+
+    return false;
+  }
+};
+
+module.exports = ZeebeModdleExtension;
+
+// helpers //////////
+
+function is(element, type) {
+  return element && isFunction(element.$instanceOf) && element.$instanceOf(type);
+}
+
+function getParent(element, type) {
+  if (!type) {
+    return element.$parent;
+  }
+
+  if (is(element, type)) {
+    return element;
+  }
+
+  if (!element.$parent) {
+    return;
+  }
+
+  return getParent(element.$parent, type);
+}
+
+function isAllowedInParent(property, parent) {
+
+  // (1) find property descriptor
+  var descriptor = property.$type && property.$model.getTypeDescriptor(property.$type);
+
+  var allowedIn = descriptor && descriptor.meta && descriptor.meta.allowedIn;
+
+  if (!allowedIn || isWildcard(allowedIn)) {
+    return true;
+  }
+
+  // (2) check if property has parent of allowed type
+  return some(allowedIn, function(type) {
+    return getParent(parent, type);
+  });
+}
+
+function isWildcard(allowedIn) {
+  return allowedIn.indexOf(WILDCARD) !== -1;
+}

lib/index.js

@@ -0,0 +1,6 @@
+'use strict';
+
+module.exports = {
+  __init__: [ 'zeebeModdleExtension' ],
+  zeebeModdleExtension: [ 'type', require('./extension') ]
+};

resources/zeebe.json

@@ -9,7 +9,9 @@
   "types": [
     {
       "name": "ZeebeServiceTask",
-      "extends": [ "bpmn:ServiceTask"],
+      "extends": [
+        "bpmn:ServiceTask"
+      ],
       "properties": [
         {
           "name": "retryCounter",
@@ -70,11 +72,31 @@
     },
     {
       "name": "Input",
-      "superClass": [ "InputOutputParameter" ]
+      "superClass": [
+        "InputOutputParameter"
+      ],
+      "meta": {
+        "allowedIn": [
+          "bpmn:CallActivity",
+          "bpmn:ServiceTask",
+          "bpmn:SubProcess"
+        ]
+      }
     },
     {
       "name": "Output",
-      "superClass": [ "InputOutputParameter" ]
+      "superClass": [
+        "InputOutputParameter"
+      ],
+      "meta": {
+        "allowedIn": [
+          "bpmn:CallActivity",
+          "bpmn:Event",
+          "bpmn:ReceiveTask",
+          "bpmn:ServiceTask",
+          "bpmn:SubProcess"
+        ]
+      }
     },
     {
       "name": "TaskHeaders",
@@ -194,4 +216,4 @@
       ]
     }
   ]
-}
+}