refactor: reduce duplicate code

src/v0/destinations/mp/transform.js

@@ -37,9 +37,9 @@ const {
   batchEvents,
   trimTraits,
   generatePageOrScreenCustomEventName,
+  recordBatchSizeMetrics,
 } = require('./util');
 const { CommonUtils } = require('../../../util/common');
-const stats = require('../../../util/stats');
 
 // ref: https://help.mixpanel.com/hc/en-us/articles/115004613766-Default-Properties-Collected-by-Mixpanel
 const mPEventPropertiesConfigJson = mappingConfig[ConfigCategory.EVENT_PROPERTIES.name];
@@ -480,10 +480,12 @@ const process = (event) => processSingleMessage(event.message, event.destination
 // Ref: https://help.mixpanel.com/hc/en-us/articles/115004613766-Default-Properties-Collected-by-Mixpanel
 // Ref: https://help.mixpanel.com/hc/en-us/articles/115004561786-Track-UTM-Tags
 const processRouterDest = async (inputs, reqMetadata) => {
-  let engageBatchSize = 0;
-  let groupsBatchSize = 0;
-  let trackBatchSize = 0;
-  let importBatchSize = 0;
+  const batchSize = {
+    engage: 0,
+    groups: 0,
+    track: 0,
+    import: 0,
+  };
 
   const groupedEvents = groupEventsByType(inputs);
   const response = await Promise.all(
@@ -516,10 +518,10 @@ const processRouterDest = async (inputs, reqMetadata) => {
       const { engageEvents, groupsEvents, trackEvents, importEvents, batchErrorRespList } =
         groupEventsByEndpoint(transformedPayloads);
 
-      engageBatchSize += engageEvents.length;
-      groupsBatchSize += groupsEvents.length;
-      trackBatchSize += trackEvents.length;
-      importBatchSize += importEvents.length;
+      batchSize.engage += engageEvents.length;
+      batchSize.groups += groupsEvents.length;
+      batchSize.track += trackEvents.length;
+      batchSize.import += importEvents.length;
 
       const engageRespList = batchEvents(engageEvents, ENGAGE_MAX_BATCH_SIZE, reqMetadata);
       const groupsRespList = batchEvents(groupsEvents, GROUPS_MAX_BATCH_SIZE, reqMetadata);
@@ -540,19 +542,7 @@ const processRouterDest = async (inputs, reqMetadata) => {
   const allBatchedEvents = lodash.flatMap(response);
 
   const { destination } = allBatchedEvents[0];
-  stats.gauge('mixpanel_batch_engage_pack_size', engageBatchSize, {
-    destination_id: destination.ID,
-  });
-  stats.gauge('mixpanel_batch_group_pack_size', groupsBatchSize, {
-    destination_id: destination.ID,
-  });
-  stats.gauge('mixpanel_batch_track_pack_size', trackBatchSize, {
-    destination_id: destination.ID,
-  });
-  stats.gauge('mixpanel_batch_import_pack_size', importBatchSize, {
-    destination_id: destination.ID,
-  });
-
+  recordBatchSizeMetrics(batchSize, destination.ID);
   return combineBatchRequestsWithSameJobIds(allBatchedEvents);
 };
 

src/v0/destinations/mp/util.js

@@ -25,6 +25,7 @@ const {
   mappingConfig,
 } = require('./config');
 const { CommonUtils } = require('../../../util/common');
+const stats = require('../../../util/stats');
 
 const mPIdentifyConfigJson = mappingConfig[ConfigCategory.IDENTIFY.name];
 const mPProfileAndroidConfigJson = mappingConfig[ConfigCategory.PROFILE_ANDROID.name];
@@ -342,6 +343,32 @@ const generatePageOrScreenCustomEventName = (message, userDefinedEventTemplate)
   return eventName;
 };
 
+/**
+ * Records the batch size metrics for different endpoints.
+ *
+ * @param {Object} batchSize - The object containing the batch size for different endpoints.
+ * @param {number} batchSize.engage - The batch size for engage endpoint.
+ * @param {number} batchSize.groups - The batch size for group endpoint.
+ * @param {number} batchSize.track - The batch size for track endpoint.
+ * @param {number} batchSize.import - The batch size for import endpoint.
+ * @param {string} destinationId - The ID of the destination.
+ * @returns {void}
+ */
+const recordBatchSizeMetrics = (batchSize, destinationId) => {
+  stats.gauge('mixpanel_batch_engage_pack_size', batchSize.engage, {
+    destination_id: destinationId,
+  });
+  stats.gauge('mixpanel_batch_group_pack_size', batchSize.groups, {
+    destination_id: destinationId,
+  });
+  stats.gauge('mixpanel_batch_track_pack_size', batchSize.track, {
+    destination_id: destinationId,
+  });
+  stats.gauge('mixpanel_batch_import_pack_size', batchSize.import, {
+    destination_id: destinationId,
+  });
+};
+
 module.exports = {
   createIdentifyResponse,
   isImportAuthCredentialsAvailable,
@@ -351,4 +378,5 @@ module.exports = {
   batchEvents,
   trimTraits,
   generatePageOrScreenCustomEventName,
+  recordBatchSizeMetrics,
 };