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/*
* 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.
*/
// Note: This is forked from FIRMessagingInstanceIDProxy.m
#import "FUNInstanceIDProxy.h"
@implementation FUNInstanceIDProxy
+ (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;
}
IMP instanceIDImp = [instanceIDClass methodForSelector:instanceIDSelector];
id (*instanceIDFunc)(id, SEL) = (void *)instanceIDImp;
proxyInstanceID = instanceIDFunc(instanceIDClass, instanceIDSelector);
});
return (FUNInstanceIDProxy *)proxyInstanceID;
}
#pragma mark - Tokens
- (nullable NSString *)token {
id proxy = [[self class] instanceIDProxy];
SEL getTokenSelector = NSSelectorFromString(@"token");
if (![proxy respondsToSelector:getTokenSelector]) {
return nil;
}
IMP getTokenIMP = [proxy methodForSelector:getTokenSelector];
NSString *(*getToken)(id, SEL) = (void *)getTokenIMP;
return getToken(proxy, getTokenSelector);
}
@end
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