Merge pull request #528 from ably/ECO-4840/fix-transportParams-serial…

…ization

fix(iOS): `transportParams` serialization

ios/Classes/codec/AblyFlutterReader.h

@@ -9,6 +9,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 +(ARTTokenDetails *)tokenDetailsFromDictionary: (NSDictionary *) dictionary;
 +(ARTTokenParams *)tokenParamsFromDictionary: (NSDictionary *) dictionary;
++(NSDictionary<NSString *, ARTStringifiable *> *)transportParamsFromDictionary: (NSDictionary *) dictionary;
 
 @end
 

ios/Classes/codec/AblyFlutterReader.m

@@ -140,7 +140,9 @@ use an explicitly received null from Dart (manifesting this side as a nil id)
     READ_VALUE(clientOptions, idempotentRestPublishing, dictionary, TxClientOptions_idempotentRestPublishing);
     READ_VALUE(clientOptions, fallbackHosts, dictionary, TxClientOptions_fallbackHosts);
     READ_VALUE(clientOptions, fallbackHostsUseDefault, dictionary, TxClientOptions_fallbackHostsUseDefault);
-    READ_VALUE(clientOptions, transportParams, dictionary, TxClientOptions_transportParams);
+    ON_VALUE(^(const id value) {
+        clientOptions.transportParams = [AblyFlutterReader transportParamsFromDictionary: value];
+    }, dictionary, TxClientOptions_transportParams);
     ON_VALUE(^(const id value) {
         clientOptions.defaultTokenParams = [AblyFlutterReader tokenParamsFromDictionary: value];
     }, dictionary, TxClientOptions_defaultTokenParams);
@@ -245,6 +247,19 @@ +(ARTTokenParams *)tokenParamsFromDictionary: (NSDictionary *) dictionary {
     return tokenParams;
 }
 
+
++(NSDictionary<NSString *, ARTStringifiable *> *)transportParamsFromDictionary: (NSDictionary *) dictionary {
+    NSMutableDictionary<NSString *, ARTStringifiable *> *result = [NSMutableDictionary dictionary];
+
+    for (NSString *key in dictionary) {
+        NSString *value = dictionary[key];
+        ARTStringifiable *stringifiable = [[ARTStringifiable alloc] initWithString:value];
+        result[key] = stringifiable;
+    }
+
+    return [result copy];
+}
+
 static AblyCodecDecoder readChannelMessageExtras = ^id<ARTJsonCompatible>(NSDictionary *const dictionary) {
     return dictionary[TxMessageExtras_extras];
 };