Re-add sync error categories.

CHANGELOG.md

@@ -3,6 +3,9 @@
 ### Enhancements
 * <New feature description> (PR [#????](https://github.com/realm/realm-core/pull/????))
 * Added support for server log messages that are enabled by sync protocol version 10. Appservices request id will be provided in a server log message in a future server release. ([PR #6476](https://github.com/realm/realm-core/pull/6476))
+* A new `ErrorCategory::sync_error` has been added. All errors related to the Sync client, protocol or session will have this category.
+  Note that websocket errors will have both the `websocket_error` and `sync_error` category, similar to `app_error` and `http_error`
+  for failed HTTP requests from the App. ([#6916](https://github.com/realm/realm-core/issues/6916))
 
 ### Fixed
 * <How do the end-user experience this issue? what was the impact?> ([#????](https://github.com/realm/realm-core/issues/????), since v?.?.?)

src/realm/error_codes.cpp

@@ -33,7 +33,6 @@ ErrorCategory ErrorCodes::error_categories(Error code)
             break;
 
         case AddressSpaceExhausted:
-        case BadChangeset:
         case BadVersion:
         case BrokenInvariant:
         case CallbackFailed:
@@ -47,22 +46,30 @@ ErrorCategory ErrorCodes::error_categories(Error code)
         case RangeError:
         case RuntimeError:
         case SchemaVersionMismatch:
-        case SubscriptionFailed:
         case UnsupportedFileFormatVersion:
         case OperationAborted:
+            return ErrorCategory().set(ErrorCategory::runtime_error);
+
         case AutoClientResetFailed:
+        case BadChangeset:
         case ConnectionClosed:
+        case SubscriptionFailed:
         case SyncClientResetRequired:
         case SyncCompensatingWrite:
-        case SyncConnectFailed:
         case SyncPermissionDenied:
         case SyncProtocolInvariantFailed:
-        case SyncProtocolNegotiationFailed:
         case SyncServerPermissionsChanged:
         case SyncUserMismatch:
-        case TlsHandshakeFailed:
         case SyncWriteNotAllowed:
-            return ErrorCategory().set(ErrorCategory::runtime_error);
+            return ErrorCategory().set(ErrorCategory::runtime_error).set(ErrorCategory::sync_error);
+
+        case SyncConnectFailed:
+        case SyncProtocolNegotiationFailed:
+        case TlsHandshakeFailed:
+            return ErrorCategory()
+                .set(ErrorCategory::runtime_error)
+                .set(ErrorCategory::websocket_error)
+                .set(ErrorCategory::sync_error);
 
         case DecryptionFailed:
         case DeleteOnOpenRealm:
@@ -128,11 +135,16 @@ ErrorCategory ErrorCodes::error_categories(Error code)
         case TopLevelObject:
         case TypeMismatch:
         case UnexpectedPrimaryKey:
+            return ErrorCategory().set(ErrorCategory::invalid_argument).set(ErrorCategory::logic_error);
+
         case BadSyncPartitionValue:
         case InvalidSubscriptionQuery:
         case SyncInvalidSchemaChange:
         case WrongSyncType:
-            return ErrorCategory().set(ErrorCategory::invalid_argument).set(ErrorCategory::logic_error);
+            return ErrorCategory()
+                .set(ErrorCategory::invalid_argument)
+                .set(ErrorCategory::logic_error)
+                .set(ErrorCategory::sync_error);
 
         case CustomError:
             return ErrorCategory()

src/realm/error_codes.h

@@ -32,6 +32,7 @@ typedef enum realm_error_category {
     RLM_ERR_CAT_HTTP_ERROR = 0x0400,
     RLM_ERR_CAT_CUSTOM_ERROR = 0x0800,
     RLM_ERR_CAT_WEBSOCKET_ERROR = 0x1000,
+    RLM_ERR_CAT_SYNC_ERROR = 0x2000,
 } realm_error_category_e;
 
 typedef enum realm_errno {

src/realm/error_codes.hpp

@@ -42,6 +42,7 @@ struct ErrorCategory {
         http_error = RLM_ERR_CAT_HTTP_ERROR,
         custom_error = RLM_ERR_CAT_CUSTOM_ERROR,
         websocket_error = RLM_ERR_CAT_WEBSOCKET_ERROR,
+        sync_error = RLM_ERR_CAT_SYNC_ERROR,
     };
     constexpr ErrorCategory() = default;
     constexpr bool test(Type cat)