fix: consider email from dataSoruce as well (#5039)

🔒 Scanned for secrets using gitleaks 8.28.0

## What are the changes introduced in this PR?

We are considering email form data fields as well.

## What is the related Linear task?

Resolves INT-

## Please explain the objectives of your changes below

Put down any required details on the broader aspect of your changes. If
there are any dependent changes, **mandatorily** mention them here

### Any changes to existing capabilities/behaviour, mention the reason &
what are the changes ?

N/A

### Any new dependencies introduced with this change?

N/A

### Any new generic utility introduced or modified. Please explain the
changes.

N/A

### Any technical or performance related pointers to consider with the
change?

N/A

@coderabbitai review

<hr>

### Developer checklist

- [ ] My code follows the style guidelines of this project

- [ ] **No breaking changes are being introduced.**

- [ ] All related docs linked with the PR?

- [ ] All changes manually tested?

- [ ] Any documentation changes needed with this change?

- [ ] Is the PR limited to 10 file changes?

- [ ] Is the PR limited to one linear task?

- [ ] Are relevant unit and component test-cases added in **new
readability format**?

### Reviewer checklist

- [ ] Is the type of change in the PR title appropriate as per the
changes?

- [ ] Verified that there are no credentials or confidential data
exposed with the changes.

Author: ItsSudip

src/sources/iterable/mapping.json

@@ -1,6 +1,6 @@
 [
   {
-    "sourceKeys": "email",
+    "sourceKeys": ["email", "dataFields.email"],
     "destKeys": "context.traits.email"
   },
   {

src/sources/iterable/transform.js

@@ -20,7 +20,9 @@ const isNonEmptyString = (val) => typeof val === 'string' && isDefinedAndNotNull
  */
 function checkForRequiredFields(event) {
   if (
-    (!isNonEmptyString(event.email) && !isNonEmptyString(event.userId)) ||
+    (!isNonEmptyString(event.email) &&
+      !isNonEmptyString(event.userId) &&
+      !isNonEmptyString(event?.dataFields?.email)) ||
     !isNonEmptyString(event.eventName)
   ) {
     throw new TransformationError('Unknown event type from Iterable');
@@ -55,7 +57,7 @@ function process(payload) {
   // Treating userId as unique identifier
   // If userId is not present, then generating it from email using md5 hash function
   if (!isDefinedAndNotNull(message.userId)) {
-    message.userId = md5(event.email);
+    message.userId = md5(message.context.traits.email);
   }
 
   return message;

test/integrations/sources/iterable/data.ts

@@ -105,16 +105,32 @@ export const data = [
         status: 200,
         body: [
           {
-            error: 'Unknown event type from Iterable',
-            statTags: {
-              destinationId: 'Non determinable',
-              errorCategory: 'transformation',
-              implementation: 'native',
-              module: 'source',
-              srcType: 'iterable',
-              workspaceId: 'Non determinable',
+            output: {
+              batch: [
+                {
+                  userId: '7c904adb430b791c0abd432442374b17',
+                  context: {
+                    integration: { name: 'Iterable', version: '1.0.0' },
+                    library: { name: 'unknown', version: 'unknown' },
+                    traits: { email: 'test@abcd.com' },
+                  },
+                  event: 'emailSubscribe',
+                  integrations: { Iterable: false },
+                  properties: {
+                    channelIds: [],
+                    createdAt: '2022-04-19 03:33:50 +00:00',
+                    emailListIds: [1589748],
+                    messageTypeIds: [],
+                    profileUpdatedAt: '2022-04-19 03:33:50 +00:00',
+                    publicIdString: 'ad474bf7-e785-480f-b9d0-861b85ab5bf5',
+                    signupSource: 'WebForm',
+                  },
+                  receivedAt: '2022-04-19T03:33:50.000Z',
+                  timestamp: '2022-04-19T03:33:50.000Z',
+                  type: 'track',
+                },
+              ],
             },
-            statusCode: 400,
           },
         ],
       },
@@ -2421,6 +2437,7 @@ export const data = [
                   context: {
                     integration: { name: 'Iterable', version: '1.0.0' },
                     library: { name: 'unknown', version: 'unknown' },
+                    traits: { email: 'docs@iterable.com' },
                   },
                   event: 'webPushSendSkip',
                   integrations: { Iterable: false },