feat: add support for global customContext option (#485)

* chore: remove lingering reference to deleted RudderConfig file

* fix: logic to merge the externalId in identify call

* chore: refactor code

* feat: add global option support for customContext

* feat: when reset is called then clear the  globalOptions customContext field

* chore: create a mutable copy of customContexts while merging

* Revert "chore: refactor code"

This reverts commit 4773a05.

* Revert "fix: logic to merge the externalId in identify call"

This reverts commit 9e22dbb.

* Revert "chore: remove lingering reference to deleted RudderConfig file"

This reverts commit fd8bf6b.

Sources/Classes/RSEventRepository.m

@@ -268,6 +268,19 @@ - (void)applyIntegrations:(RSMessage *)message withDefaultOption:(RSOption *)def
         [mutableIntegrations setObject:@YES forKey:@"All"];
         message.integrations = mutableIntegrations;
     }
+
+    // Merge local customContext (message.customContexts) with global customContext (defaultOption.customContexts) giving preference to local one.
+    if (defaultOption) {
+        NSMutableDictionary<NSString*, NSDictionary<NSString*, id>*>* mergedCustomContextValues = [NSMutableDictionary dictionaryWithDictionary:[message.customContexts mutableCopy]];
+
+        for (NSString* key in defaultOption.customContexts) {
+            if (!mergedCustomContextValues[key]) {
+                mergedCustomContextValues[key] = [defaultOption.customContexts[key] mutableCopy];
+            }
+        }
+
+        message.customContexts = mergedCustomContextValues;
+    }
 }
 
 - (RSMessage *)applyConsents:(RSMessage *)message {
@@ -287,6 +300,11 @@ - (void)applySession:(RSMessage *)message withUserSession:(RSUserSession *)_user
 }
 
 -(void) reset {
+    if (self->defaultOptions != nil && self->defaultOptions.customContexts != nil) {
+        // Since the reset operation is intended to reset user-level fields, we clear the globalOptions->customContext field.
+        // The globalOptions->integrations field is a workspace-level setting and should not be cleared.
+        [self->defaultOptions.customContexts removeAllObjects];
+    }
     if([self->userSession getSessionId] != nil) {
         [RSLogger logDebug: @"EventRepository: reset: Refreshing the session as the reset is triggered"];
         [self->userSession refreshSession];