Move common utils used by clients into extension

theia-tree-editor-extension/src/browser/tree-editor-utils.ts

@@ -0,0 +1,59 @@
+import { JsonSchema7 } from '@jsonforms/core';
+import { Property } from '@jsonforms/material-tree-renderer';
+
+export interface LabelDefinition {
+  /** A constant label value displayed for every object for which this label definition applies. */
+  constant?: string;
+  /** The property name that is used to get a variable part of an object's label. */
+  property?: string;
+}
+
+export const calculateLabel = (labels) =>
+  (schema: JsonSchema7) => (element: Object): string => {
+
+    if (labels !== undefined && labels[schema.$id] !== undefined) {
+
+      if (typeof labels[schema.$id] === 'string') {
+        // To be backwards compatible: a simple string is assumed to be a property name
+        console.log('element', element);
+        return element[labels[schema.$id]];
+      }
+      if (typeof labels[schema.$id] === 'object') {
+        const info = labels[schema.$id] as LabelDefinition;
+        let label;
+        if (info.constant !== undefined) {
+          label = info.constant;
+        }
+        if (info.property !== undefined && element[info.property] !== undefined) {
+          label = label === undefined ?
+            element[info.property] :
+            `${label} ${element[info.property]}`;
+        }
+        if (label !== undefined) {
+          return label;
+        }
+      }
+    }
+
+    const namingKeys = Object
+      .keys(schema.properties)
+      .filter(key => key === '$id' || key === 'name');
+    if (namingKeys.length !== 0) {
+      return element[namingKeys[0]];
+    }
+
+    return JSON.stringify(element);
+  };
+
+export const filterPredicate = (modelMapping) => (data: Object) => {
+  return (property: Property): boolean => {
+    if (modelMapping !== undefined && modelMapping.mapping !== undefined) {
+      if (data[modelMapping.attribute]) {
+        return property.schema.$id === modelMapping.mapping[data[modelMapping.attribute]];
+      }
+      return true;
+    }
+
+    return false;
+  };
+};