Make OSResponseStatusType enum to categorize status codes

* Borrow from Android and introduce 5 categories of server responses:
- Unauthorized
- Missing
- Conflict
- Retryable

Author: nan-li

iOS_SDK/OneSignalSDK/OneSignalCore/Source/API/OSNetworkingUtils.h

@@ -29,9 +29,18 @@
 
 // NS_ASSUME_NONNULL_BEGIN
 
+typedef NS_ENUM(NSInteger, OSResponseStatusType) {
+    OSResponseStatusInvalid = 0,
+    OSResponseStatusRetryable,
+    OSResponseStatusUnauthorized,
+    OSResponseStatusMissing,
+    OSResponseStatusConflict
+};
+
 @interface OSNetworkingUtils : NSObject
 
 + (NSNumber*)getNetType;
++ (OSResponseStatusType)getResponseStatusType:(NSInteger)statusCode;
 
 @end
 

iOS_SDK/OneSignalSDK/OneSignalCore/Source/API/OSNetworkingUtils.m

@@ -38,4 +38,18 @@ + (NSNumber *)getNetType {
     return @1;
 }
 
++ (OSResponseStatusType)getResponseStatusType:(NSInteger)statusCode {
+    if (statusCode == 400 || statusCode == 402) {
+        return OSResponseStatusInvalid;
+    } else if (statusCode == 401 || statusCode == 403) {
+        return OSResponseStatusUnauthorized;
+    } else if (statusCode == 404 || statusCode == 410) {
+        return OSResponseStatusMissing;
+    } else if (statusCode == 409) {
+        return OSResponseStatusConflict;
+    } else {
+        return OSResponseStatusRetryable;
+    }
+}
+
 @end