feat: Support embedded message chaining

src/Messages.ts

@@ -248,10 +248,10 @@ export default class Messages {
         this.occurrenceTracker.recordOccurrence(id)
         this.trackMessage(id, { event, value, info, params })
       },
-      runActionNamed: (actionName: string): void => this.onAction(vars[actionName]),
+      runActionNamed: (actionName: string): void => this.onAction(vars[actionName], id),
       runTrackedActionNamed: (actionName: string): void => {
         const event = actionName.replace(/ action$/, '')
-        this.trackMessage(id, { event }, () => this.onAction(vars[actionName]))
+        this.trackMessage(id, { event }, () => this.onAction(vars[actionName], id))
       },
     }
 
@@ -404,17 +404,17 @@ export default class Messages {
     })
   }
 
-  onAction(action: Action): void {
+  onAction(action: Action, parentMessageId = ''): void {
     if (!action) {
       return
     }
 
     const messages = this._messageCache
-    if (action && action.__name__ === 'Chain to Existing Message') {
+    if (action.__name__ === 'Chain to Existing Message') {
       const chainedMessageId = action['Chained message']
       const message = messages[chainedMessageId]
       if (message.action === 'Open URL') {
-        this.trackMessage(chainedMessageId, { event: 'View' }, () => this.onAction(message.vars))
+        this.trackMessage(chainedMessageId, { event: 'View' }, () => this.onAction(message.vars, chainedMessageId))
       } else if (message.action === 'Register For Push') {
         this.events.emit('registerForPush')
       } else {
@@ -426,10 +426,18 @@ export default class Messages {
 
     // handle app function
     const processAction = (): void => {
+      const name = action.__name__
       if (action.__name__ === 'Open URL') {
         this.events.emit('navigationChange', action.URL)
       } else if (action.__name__ === 'Register For Push') {
         this.events.emit('registerForPush')
+      } else if (name) {
+        // embedded chained message
+        this.showMessage(parentMessageId, {
+          messageId: parentMessageId,
+          action: name,
+          vars: action as any, // eslint-disable-line
+        })
       }
     }
     const messageId = this.messageIdFromAction(action)

test/specs/Messages.test.ts

@@ -166,6 +166,37 @@ describe(Messages, () => {
       expect(navigationChange).toHaveBeenCalledWith("https://example.com/success")
     })
 
+    it('triggers showMessage for embedded chained message', () => {
+      events.emit('messagesReceived', {
+        "123": {
+          action: "Confirm",
+          whenTriggers: TRIGGER_ON_START,
+          parentCampaignId: 456,
+          vars: {
+            __name__: "Confirm",
+            "Accept action": {
+              __name__: "Confirm",
+              Title: "Confirm again",
+            }
+          },
+        }
+      })
+
+      events.emit('start')
+
+      expect(showMessage).toHaveBeenCalledTimes(1)
+
+      // trigger accept action
+      showMessage.mock.calls[0][0].context.runActionNamed('Accept action')
+
+      expect(showMessage).toHaveBeenCalledTimes(2)
+      const secondMessage = showMessage.mock.calls[1][0].message
+      expect(secondMessage).toHaveProperty('__name__', 'Confirm')
+      expect(secondMessage).toHaveProperty('Title', 'Confirm again')
+      expect(secondMessage).toHaveProperty('messageId', '123')
+    })
+
+
     it('tracks actions', () => {
       events.emit('messagesReceived', {
         "123": {