feat(property): add default value handling in JsonSchema and related functions (finos#1648)

Author: rocketstack-matt

shared/src/commands/generate/components/property.spec.ts

@@ -1,13 +1,13 @@
- 
 
-import { getConstValue, getEnumPlaceholder, getPropertyValue } from './property';
+
+import { getConstValue, getDefaultValue, getEnumPlaceholder, getPropertyValue } from './property';
 
 vi.mock('../../../logger', () => {
     return {
         initLogger: () => {
             return {
-                info: () => {},
-                debug: () => {}
+                info: () => { },
+                debug: () => { }
             };
         }
     };
@@ -39,6 +39,32 @@ describe('getConstValue', () => {
     });
 });
 
+describe('getDefaultValue', () => {
+    it('generates default value if default is provided', () => {
+        expect(getDefaultValue({
+            'default': 'Example value'
+        }))
+            .toBe('Example value');
+    });
+
+    it('generates default value with entire subtree if default is provided', () => {
+        expect(getDefaultValue({
+            'default': {
+                'connects': {
+                    'source': 'source',
+                    'destination': 'destination'
+                }
+            }
+        }))
+            .toEqual({
+                'connects': {
+                    'source': 'source',
+                    'destination': 'destination'
+                }
+            });
+    });
+});
+
 describe('getPropertyValue', () => {
     it('generates string placeholder name from variable', () => {
         expect(getPropertyValue('key-name', {
@@ -70,7 +96,7 @@ describe('getPropertyValue', () => {
         }))
             .toBe('[[ REF_KEY_NAME ]]');
     });
-    
+
     it('generates boolean placeholder from variable', () => {
         expect(getPropertyValue('key-name', {
             'type': 'boolean'

shared/src/commands/generate/components/property.ts

@@ -1,5 +1,6 @@
 export interface JsonSchema {
     const?: string | object,
+    default?: string | object,
     enum?: string[],
     type?: 'string' | 'integer' | 'number' | 'array' | 'boolean' | 'object',
     $ref?: string
@@ -27,16 +28,23 @@ export function getBooleanPlaceholder(name: string): string {
  * @param detail The detail from the object to instantiate
  * @returns Either the value or the object described by the 'const' property.
  */
-export function getConstValue(detail: JsonSchema) : string | object {
+export function getConstValue(detail: JsonSchema): string | object {
     return detail.const;
 }
 
+export function getDefaultValue(detail: JsonSchema): string | object {
+    return detail.default;
+}
+
 export function getPropertyValue(keyName: string, detail: JsonSchema): string | string[] | number | object {
-    // if both const and type are defined, prefer const
+    // if const, default and type are defined, prefer const
     if (detail.const) {
         return detail.const;
     }
-
+    // if default and type are defined, prefer default
+    if (detail.default) {
+        return detail.default;
+    }
     if (detail.type) {
         const propertyType = detail.type;