Chapter 11 - Chat App/ChatAppFinished/Pods/FirebaseStorage/Firebase/Storage/FIRStorageTask.m
// 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 "FIRStorageTask.h"

#import "FIRStorage.h"
#import "FIRStorageReference.h"
#import "FIRStorageReference_Private.h"
#import "FIRStorageTaskSnapshot.h"
#import "FIRStorageTaskSnapshot_Private.h"
#import "FIRStorageTask_Private.h"
#import "FIRStorage_Private.h"

#import <GTMSessionFetcher/GTMSessionFetcherService.h>

@implementation FIRStorageTask

- (instancetype)init {
  @throw [NSException exceptionWithName:@"Attempt to call unavailable initializer."
                                 reason:@"init unavailable, use designated initializer"
                               userInfo:nil];
}

- (instancetype)initWithReference:(FIRStorageReference *)reference
                   fetcherService:(GTMSessionFetcherService *)service
                    dispatchQueue:(dispatch_queue_t)queue {
  self = [super init];
  if (self) {
    _reference = reference;
    _baseRequest = [FIRStorageUtils defaultRequestForPath:reference.path];
    _fetcherService = service;
    _fetcherService.maxRetryInterval = _reference.storage.maxOperationRetryTime;
    _dispatchQueue = queue;
  }
  return self;
}

- (FIRStorageTaskSnapshot *)snapshot {
  @synchronized(self) {
    NSProgress *progress = [NSProgress progressWithTotalUnitCount:self.progress.totalUnitCount];
    progress.completedUnitCount = self.progress.completedUnitCount;
    FIRStorageTaskSnapshot *snapshot =
        [[FIRStorageTaskSnapshot alloc] initWithTask:self
                                               state:self.state
                                            metadata:self.metadata
                                           reference:self.reference
                                            progress:progress
                                               error:[self.error copy]];
    return snapshot;
  }
}

- (void)dispatchAsync:(void (^)(void))block {
  dispatch_async(self.dispatchQueue, block);
}

@end
