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/*
* Copyright 2018 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.
*/
#include "Firestore/core/src/firebase/firestore/auth/firebase_credentials_provider_apple.h"
#import <FirebaseCore/FIRApp.h>
#import <FirebaseCore/FIRAppInternal.h>
#import <FirebaseCore/FIROptionsInternal.h>
#include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
#include "Firestore/core/src/firebase/firestore/util/string_apple.h"
// NB: This is also defined in Firestore/Source/Public/FIRFirestoreErrors.h
// NOLINTNEXTLINE: public constant
NSString* const FIRFirestoreErrorDomain = @"FIRFirestoreErrorDomain";
namespace firebase {
namespace firestore {
namespace auth {
FirebaseCredentialsProvider::FirebaseCredentialsProvider(FIRApp* app)
: contents_(std::make_shared<Contents>(app, User::FromUid([app getUID]))) {
std::weak_ptr<Contents> weak_contents = contents_;
auth_listener_handle_ = [[NSNotificationCenter defaultCenter]
addObserverForName:FIRAuthStateDidChangeInternalNotification
object:nil
queue:nil
usingBlock:^(NSNotification* notification) {
std::shared_ptr<Contents> contents = weak_contents.lock();
if (!contents) {
return;
}
std::unique_lock<std::mutex> lock(contents->mutex);
NSDictionary<NSString*, id>* user_info = notification.userInfo;
// ensure we're only notifying for the current app.
FIRApp* notified_app =
user_info[FIRAuthStateDidChangeInternalNotificationAppKey];
if (![contents->app isEqual:notified_app]) {
return;
}
NSString* user_id =
user_info[FIRAuthStateDidChangeInternalNotificationUIDKey];
User new_user = User::FromUid(user_id);
if (new_user != contents->current_user) {
contents->current_user = new_user;
contents->user_counter++;
UserChangeListener listener = user_change_listener_;
if (listener) {
listener(contents->current_user);
}
}
}];
}
FirebaseCredentialsProvider::~FirebaseCredentialsProvider() {
if (auth_listener_handle_) {
// Even though iOS 9 (and later) and macOS 10.11 (and later) keep a weak
// reference to the observer so we could avoid this removeObserver call, we
// still support iOS 8 which requires it.
[[NSNotificationCenter defaultCenter] removeObserver:auth_listener_handle_];
}
}
void FirebaseCredentialsProvider::GetToken(TokenListener completion) {
HARD_ASSERT(auth_listener_handle_,
"GetToken cannot be called after listener removed.");
// Take note of the current value of the userCounter so that this method can
// fail if there is a user change while the request is outstanding.
int initial_user_counter = contents_->user_counter;
std::weak_ptr<Contents> weak_contents = contents_;
void (^get_token_callback)(NSString*, NSError*) =
^(NSString* _Nullable token, NSError* _Nullable error) {
std::shared_ptr<Contents> contents = weak_contents.lock();
if (!contents) {
return;
}
std::unique_lock<std::mutex> lock(contents->mutex);
if (initial_user_counter != contents->user_counter) {
// Cancel the request since the user changed while the request was
// outstanding so the response is likely for a previous user (which
// user, we can't be sure).
completion(util::Status(FirestoreErrorCode::Aborted,
"getToken aborted due to user change."));
} else {
if (error == nil) {
if (token != nil) {
completion(
Token{util::MakeStringView(token), contents->current_user});
} else {
completion(Token::Unauthenticated());
}
} else {
FirestoreErrorCode error_code = FirestoreErrorCode::Unknown;
if (error.domain == FIRFirestoreErrorDomain) {
error_code = static_cast<FirestoreErrorCode>(error.code);
}
completion(util::Status(
error_code, util::MakeStringView(error.localizedDescription)));
}
}
};
[contents_->app getTokenForcingRefresh:contents_->force_refresh
withCallback:get_token_callback];
contents_->force_refresh = false;
}
void FirebaseCredentialsProvider::InvalidateToken() {
contents_->force_refresh = true;
}
void FirebaseCredentialsProvider::SetUserChangeListener(
UserChangeListener listener) {
std::unique_lock<std::mutex> lock(contents_->mutex);
if (listener) {
HARD_ASSERT(!user_change_listener_, "set user_change_listener twice!");
// Fire initial event.
listener(contents_->current_user);
} else {
HARD_ASSERT(auth_listener_handle_, "removed user_change_listener twice!");
HARD_ASSERT(user_change_listener_,
"user_change_listener removed without being set!");
[[NSNotificationCenter defaultCenter] removeObserver:auth_listener_handle_];
auth_listener_handle_ = nil;
}
user_change_listener_ = listener;
}
} // namespace auth
} // namespace firestore
} // namespace firebase
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