1 files changed, 123 insertions, 0 deletions
diff --git a/Firebase/Messaging/FIRMessagingInstanceIDProxy.m b/Firebase/Messaging/FIRMessagingInstanceIDProxy.m
new file mode 100644
index 0000000..01b4e73
--- /dev/null
+++ b/Firebase/Messaging/FIRMessagingInstanceIDProxy.m
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRMessagingInstanceIDProxy.h"
+
+@implementation FIRMessagingInstanceIDProxy
+
++ (nonnull instancetype)instanceIDProxy {
+  static id proxyInstanceID = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    Class instanceIDClass = NSClassFromString(@"FIRInstanceID");
+    if (!instanceIDClass) {
+      proxyInstanceID = nil;
+      return;
+    }
+    SEL instanceIDSelector = NSSelectorFromString(@"instanceID");
+    if (![instanceIDClass respondsToSelector:instanceIDSelector]) {
+      proxyInstanceID = nil;
+      return;
+    }
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+    proxyInstanceID = [instanceIDClass performSelector:instanceIDSelector];
+#pragma clang diagnostic pop
+  });
+  return (FIRMessagingInstanceIDProxy *)proxyInstanceID;
+
+}
+
+- (void)setAPNSToken:(nonnull NSData *)token
+                type:(FIRMessagingInstanceIDProxyAPNSTokenType)type {
+  id proxy = [[self class] instanceIDProxy];
+
+  SEL setAPNSTokenSelector = NSSelectorFromString(@"setAPNSToken:type:");
+  if (![proxy respondsToSelector:setAPNSTokenSelector]) {
+    return;
+  }
+  // Since setAPNSToken takes a scalar value, use NSInvocation
+  NSMethodSignature *methodSignature =
+      [[proxy class] instanceMethodSignatureForSelector:setAPNSTokenSelector];
+  NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSignature];
+  invocation.selector = setAPNSTokenSelector;
+  invocation.target = proxy;
+  [invocation setArgument:&token atIndex:2];
+  [invocation setArgument:&type atIndex:3];
+  [invocation invoke];
+}
+
+#pragma mark - Tokens
+
+- (nullable NSString *)token {
+  id proxy = [[self class] instanceIDProxy];
+  SEL getTokenSelector = NSSelectorFromString(@"token");
+  if (![proxy respondsToSelector:getTokenSelector]) {
+    return nil;
+  }
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+  return [proxy performSelector:getTokenSelector];
+#pragma clang diagnostic pop
+}
+
+
+- (void)tokenWithAuthorizedEntity:(nonnull NSString *)authorizedEntity
+                            scope:(nonnull NSString *)scope
+                          options:(nullable NSDictionary *)options
+                          handler:(nonnull FIRMessagingInstanceIDProxyTokenHandler)handler {
+
+  id proxy = [[self class] instanceIDProxy];
+  SEL getTokenSelector = NSSelectorFromString(@"tokenWithAuthorizedEntity:scope:options:handler:");
+  if (![proxy respondsToSelector:getTokenSelector]) {
+    return;
+  }
+  // Since there are >2 arguments, use NSInvocation
+  NSMethodSignature *methodSignature =
+      [[proxy class] instanceMethodSignatureForSelector:getTokenSelector];
+  NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSignature];
+  invocation.selector = getTokenSelector;
+  invocation.target = proxy;
+  [invocation setArgument:&authorizedEntity atIndex:2];
+  [invocation setArgument:&scope atIndex:3];
+  [invocation setArgument:&options atIndex:4];
+  [invocation setArgument:&handler atIndex:5];
+  [invocation invoke];
+}
+
+- (void)deleteTokenWithAuthorizedEntity:(nonnull NSString *)authorizedEntity
+                                  scope:(nonnull NSString *)scope
+                                handler:
+      (nonnull FIRMessagingInstanceIDProxyDeleteTokenHandler)handler {
+
+  id proxy = [[self class] instanceIDProxy];
+  SEL deleteTokenSelector = NSSelectorFromString(@"deleteTokenWithAuthorizedEntity:scope:handler:");
+  if (![proxy respondsToSelector:deleteTokenSelector]) {
+    return;
+  }
+  // Since there are >2 arguments, use NSInvocation
+  NSMethodSignature *methodSignature =
+      [[proxy class] instanceMethodSignatureForSelector:deleteTokenSelector];
+  NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:methodSignature];
+  invocation.selector = deleteTokenSelector;
+  invocation.target = proxy;
+  [invocation setArgument:&authorizedEntity atIndex:2];
+  [invocation setArgument:&scope atIndex:3];
+  [invocation setArgument:&handler atIndex:4];
+  [invocation invoke];
+}
+
+@end