feat: support conditions in dropdown choices

Related to camunda/camunda-modeler#3682

packages/element-templates-json-schema-shared/src/defs/base-properties.json

@@ -78,6 +78,9 @@
               "$id": "#/properties/property/choices/item/value",
               "type": "string",
               "description": "The value of a choice."
+            },
+            "condition": {
+              "$ref": "condition.json"
             }
           },
           "required": [

packages/zeebe-element-templates-json-schema/test/fixtures/condition-dropdown-choices-invalid.js

@@ -0,0 +1,65 @@
+export const template = {
+  'name': 'Condition',
+  'id': 'example.com.condition',
+  'appliesTo': [
+    'bpmn:ServiceTask'
+  ],
+  'properties': [
+    {
+      'id': 'myId',
+      'label': 'input 1',
+      'type': 'String',
+      'binding': {
+        'type': 'property',
+        'name': 'input1'
+      }
+    },
+    {
+      'label': 'Dropdown',
+      'type': 'Dropdown',
+      'choices': [
+        {
+          'value': 'opt1',
+          'name':'opt1'
+        },
+        {
+          'value': 'opt2',
+          'name': 'opt2'
+        },
+        {
+          'value': 'opt3',
+          'name': 'opt3',
+          'condition': 'myId == 2'
+        }
+      ],
+      'binding': {
+        'type': 'zeebe:property',
+        'name': 'method'
+      }
+    }
+  ]
+};
+
+export const errors = [
+  {
+    keyword: 'type',
+    dataPath: '/properties/1/choices/2/condition',
+    schemaPath: '#/type',
+    params: { type: 'object' },
+    message: 'should be object'
+  },
+  {
+    keyword: 'type',
+    dataPath: '',
+    schemaPath: '#/oneOf/1/type',
+    params: { type: 'array' },
+    message: 'should be array'
+  },
+  {
+    keyword: 'oneOf',
+    dataPath: '',
+    schemaPath: '#/oneOf',
+    params: { passingSchemas: null },
+    message: 'should match exactly one schema in oneOf'
+  }
+];

packages/zeebe-element-templates-json-schema/test/fixtures/condition-dropdown-choices.js

@@ -0,0 +1,46 @@
+export const template = {
+  'name': 'Condition',
+  'id': 'example.com.condition',
+  'appliesTo': [
+    'bpmn:ServiceTask'
+  ],
+  'properties': [
+    {
+      'id': 'myId',
+      'label': 'input 1',
+      'type': 'String',
+      'binding': {
+        'type': 'property',
+        'name': 'input1'
+      }
+    },
+    {
+      'label': 'Dropdown',
+      'type': 'Dropdown',
+      'choices': [
+        {
+          'value': 'opt1',
+          'name':'opt1'
+        },
+        {
+          'value': 'opt2',
+          'name': 'opt2'
+        },
+        {
+          'value': 'opt3',
+          'name': 'opt3',
+          'condition': {
+            'property': 'myId',
+            'equals': 'text'
+          }
+        }
+      ],
+      'binding': {
+        'type': 'zeebe:property',
+        'name': 'method'
+      }
+    }
+  ]
+};
+
+export const errors = null;

packages/zeebe-element-templates-json-schema/test/spec/validationSpec.js

@@ -281,6 +281,11 @@ describe('validation', function() {
 
       testTemplate('condition-allMatch-one-condition');
 
+
+      testTemplate('condition-dropdown-choices');
+
+
+      testTemplate('condition-dropdown-choices-invalid');
     });