PrivateBoxiOS/创维盒子/双子星云手机/Class/Set/uploadFile/mixDownloadManager/mixDownloadQueue.m

//
//  mixDownloadQueue.m
//  双子星云手机
//
//  Created by xd h on 2024/6/27.
//

#import "mixDownloadQueue.h"
#import "mixDownloadManager.h"
#import "mixDownloadCacheManager.h"
#import "mixDownloadSession.h"
#import "NSURLSession+mixDownloadTask.h"

@interface mixDownloadQueue ()
// 列队管理集合
@property (nonatomic,strong) NSMutableArray <mixDownloadOperation *> *operations;

@end

@implementation mixDownloadQueue

- (instancetype)init {

    if (self = [super init]) {
        _maxCount = 1;
        [self registeNotification];
    }
    return self;
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)didResiveDownloadFileCompete:(NSNotification *)noti {
    mixDownloadOperation *operation = noti.object;
    if (operation) {
        [self.operations removeObject:operation];
    }
}

- (NSMutableArray *)getOperationDoing {
    
    NSMutableArray *doingArray = [NSMutableArray array];
    for (mixDownloadOperation *operation in self.operations) {
        if (operation.downloadState == DownloadStateDoing) {
            [doingArray addObject:operation];
        }
    }
    return doingArray;
}

- (NSMutableArray *)getOperationWaiting {
    
    NSMutableArray *waitingArray = [NSMutableArray array];
    [self.operations enumerateObjectsUsingBlock:^(mixDownloadOperation * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        
        mixDownloadOperation *operation = (mixDownloadOperation *)obj;
        if (operation.downloadState == DownloadStateWaiting) {
            [waitingArray addObject:operation];
        }
    }];
    return waitingArray;
}

#pragma mark - handle Out operations
- (void)addDownloadWithSession:(NSURLSession *)session URL:(NSURL *)url begin:(void(^)(NSString *))begin progress:(void(^)(NSInteger,NSInteger))progress complete:(void(^)(NSDictionary *,NSError *))complet {
    // 获取operation对象
    mixDownloadOperation *operation = [self operationWithUrl:url.absoluteString];
    
    if (operation == nil) { // 之前不存在此任务
        
        operation = [[mixDownloadOperation alloc] initWith:url.absoluteString session:session];
        
        if (operation == nil) {
            // 没有下载任务代表已下载完成
            NSDictionary *fileInfo = [mixDownloadCacheManager queryFileInfoWithUrl:url.absoluteString];
            if (fileInfo && complet) {
                complet(fileInfo,nil);
            }else {
                complet(nil,[NSError errorWithDomain:@"构建下载任务失败" code:-1 userInfo:nil]);
            }
            return;
        }
        
        [self.operations addObject:operation];
    }
    
    if ([self getOperationDoing].count < self.maxCount) { // 下载中任务数少于最大任务限制
        [operation.dataTask resume];
        [self operationStartWithOperation:operation];
    }else { // 下载中任务数大于最大任务限制
//        [operation.dataTask suspend];
        [self operationWaitingWithOperation:operation];
       HLog(@"下载中任务数等于最大任务限制：%zd",[self getOperationDoing].count);
    }
}


- (void)operateDownloadWithUrl:(NSString *)url session:(NSURLSession *)session handle:(DownloadHandleType)handle {
    // 1、任务列表里取任务
    mixDownloadOperation *operation = [self operationWithUrl:url];
    HLog(@"operation.dataTask 1:%@",operation.dataTask);
    
    // 2、本地plist文件里提取的任务
    if (!operation) {
        NSDictionary *dict = [mixDownloadCacheManager queryFileInfoWithUrl:url];
        operation = [mixDownloadOperation mj_objectWithKeyValues:dict];
    }
    HLog(@"operation.dataTask 2:%@",operation.dataTask);
    
    // 3、本地plist文件里提取的任务不存在dataTask
    if (!operation.dataTask && operation.currentSize != operation.totalSize) {
        operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
        [self.operations addObject:operation];
    }
    HLog(@"operation.dataTask 3:%@",operation.dataTask);
    
    if (operation) {
        
        switch (handle) {
            case DownloadHandleTypeStart:
                
                switch (operation.dataTask.state) {
                    case NSURLSessionTaskStateRunning:
                        HLog(@"NSURLSessionTaskStateRunning");
                        break;
                    
                    case NSURLSessionTaskStateSuspended:
                        HLog(@"NSURLSessionTaskStateSuspended");
                        //operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
                        break;
                        
                    case NSURLSessionTaskStateCanceling:
                        HLog(@"NSURLSessionTaskStateCanceling");
                        operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
                        break;
                        
                    case NSURLSessionTaskStateCompleted:
                        HLog(@"NSURLSessionTaskStateCompleted");
                        break;
                        
                    default:
                        break;
                }
                
                if ([self getOperationDoing].count >= self.maxCount) { // 下载中任务数超过最大任务限制
                    HLog(@"下载中的任务数超过最大限制")
//                    [operation.dataTask suspend]; // 暂停
                    [self operationWaitingWithOperation:operation];
                    return;
                }
                
                HLog(@"operation.dataTask resume:%@",operation.dataTask);
                [operation.dataTask resume]; // 开始
                [self operationStartWithOperation:operation];
                break;
            case DownloadHandleTypeSuspend:
                HLog(@"operation.dataTask suspend:%@",operation.dataTask);
                //[operation.dataTask suspend]; // 暂停
                [operation.dataTask cancel]; // 暂停
                [self operationSuspendWithOperation:operation];
                //检测是否有等待下载的任务 有就开启下一个
                [self taskExeEnd:nil];
                break;
            case DownloadHandleTypeCancel:
                if (operation.dataTask) { // 任务列表删除任务
                    [operation.dataTask cancel];  // 取消
                    [self.operations removeObject:operation];
                }
                [mixDownloadCacheManager deleteFileWithUrl:url];   // plist删除任务
                [self operationDeleteWithOperation:operation];
                break;
        }
    }
}

- (void)suspendAllTasksWithSession:(NSURLSession *)session {
    // 暂停所有的任务
    [self.operations enumerateObjectsUsingBlock:^(mixDownloadOperation * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        
        mixDownloadOperation *operation = (mixDownloadOperation *)obj;
        if (operation.currentSize != operation.totalSize || operation.currentSize ==0) { // 暂停未完成的下载任务
            if (!operation.dataTask) { // 给plist里的任务添加dataTask 添加到operations
                operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
            }
            //[operation.dataTask suspend];
            [operation.dataTask cancel];
            [self operationSuspendWithOperation:operation];
        }else {
            HLog(@"已完成的任务");
        }

    }];
}

- (void)startAllTasksWithSession:(NSURLSession *)session {
    
    // 开始所有的任务
    [self.operations enumerateObjectsUsingBlock:^(mixDownloadOperation * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        
        mixDownloadOperation *operation = (mixDownloadOperation *)obj;
        //if (!operation.dataTask) { // 给plist里的任务添加dataTask 添加到operations
            operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
        //}
  
        if ([self getOperationDoing].count < self.maxCount) { // 下载中任务数少于最大任务限制
            HLog(@"getOperationDoing %@",operation.fileName);
            switch (operation.dataTask.state) {
                case NSURLSessionTaskStateRunning:
                    HLog(@"NSURLSessionTaskStateRunning");
                    break;
                
                case NSURLSessionTaskStateSuspended:
                    HLog(@"NSURLSessionTaskStateSuspended");
                    break;
                    
                case NSURLSessionTaskStateCanceling:
                    HLog(@"NSURLSessionTaskStateCanceling");
                    operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
                    break;
                    
                case NSURLSessionTaskStateCompleted:
                    HLog(@"NSURLSessionTaskStateCompleted");
                    break;
                    
                default:
                    break;
            }
            
            [operation.dataTask resume]; // 开始
            [self operationStartWithOperation:operation];
        }else { // 下载中任务数大于最大任务限制
//            [operation.dataTask suspend];
            [self operationWaitingWithOperation:operation];
           HLog(@"下载中任务数等于最大任务限制：%zd",[self getOperationDoing].count);
        }

    }];
}

#pragma mark-监听通知
- (void)registeNotification {
    // 监听完成通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didResiveDownloadFileCompete:) name:mixDownloadCompleteNoti object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskExeEnd:) name:mixDownloadTaskExeEnd object:nil];
//    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskExeEnd:) name:SGDownloadTaskExeError object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskExeEnd:) name:mixDownloadTaskExeSuspend object:nil];
//    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskExeEnd:) name:SGDownloadTaskExeDelete object:nil];
}
    
- (void)taskExeEnd:(NSNotification *)notification
{
    NSMutableArray *operationWaiting = [self getOperationWaiting];
    
    [operationWaiting enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        mixDownloadOperation *operation = obj;
        if ([self getOperationDoing].count < self.maxCount) {
            [self operateDownloadWithUrl:operation.url session:self.session handle:DownloadHandleTypeStart];
            
        }else {
            *stop = YES;
        }
    }];
}

#pragma mark 发送通知
// 暂停某一个operation 保存本地 通知外界
- (void)operationSuspendWithOperation:(mixDownloadOperation *)operation {
    operation.downloadState = DownloadStateSuspended;
    [mixDownloadCacheManager saveFileInfoWithDict:[operation downLoadInfoWithFinished:NO]];
    //没有必要再操作的时候通知外面
    //[[NSNotificationCenter defaultCenter] postNotificationName:SGDownloadTaskExeSuspend object:nil userInfo:@{@"operation" : operation}];
}

// 重启某一个operation 保存本地 通知外界
- (void)operationStartWithOperation:(mixDownloadOperation *)operation {
    operation.downloadState = DownloadStateDoing;
    [mixDownloadCacheManager saveFileInfoWithDict:[operation downLoadInfoWithFinished:NO]];
    
    //没有必要再操作的时候通知外面
    //[[NSNotificationCenter defaultCenter] postNotificationName:SGDownloadTaskExeing object:nil userInfo:@{@"operation" : operation}];
}

// 等待某一个operation 保存本地 通知外界
- (void)operationWaitingWithOperation:(mixDownloadOperation *)operation {
    operation.downloadState = DownloadStateWaiting;
    [mixDownloadCacheManager saveFileInfoWithDict:[operation downLoadInfoWithFinished:NO]];
    
    //没有必要再操作的时候通知外面
    //[[NSNotificationCenter defaultCenter] postNotificationName:SGDownloadTaskExeSuspend object:nil userInfo:@{@"operation" : operation}];
}
    
// 删除某一个operation 保存本地 通知外界
- (void)operationDeleteWithOperation:(mixDownloadOperation *)operation {
    //1. 任务删除了为什么不删除本地数据？
    
    //[[NSNotificationCenter defaultCenter] postNotificationName:SGDownloadTaskExeDelete object:nil userInfo:nil];
}

#pragma mark - handle download
- (void)dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response {
    [[self oprationWithDataTask:dataTask] operateWithResponse:response];
}

- (void)dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
    [[self oprationWithDataTask:dataTask] operateWithReceivingData:data];
}


- (void)task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error {
    [[self oprationWithDataTask:task] operateWithComplete:error];
}

#pragma mark - query operation
- (mixDownloadOperation *)operationWithUrl:(NSString *)url{
    __block mixDownloadOperation *operation = nil;
    
    [self.operations enumerateObjectsUsingBlock:^(mixDownloadOperation * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        if ([obj.url isEqualToString:url]) {
            operation = obj;
            *stop = YES;
        }
    }];
    
    return operation;
}

// 寻找operation
- (mixDownloadOperation *)oprationWithDataTask:(NSURLSessionTask *)dataTask {
    __block mixDownloadOperation *operation = nil;
    
    [self.operations enumerateObjectsUsingBlock:^(mixDownloadOperation * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        if (obj.dataTask == dataTask) {
            operation = obj;
            *stop = YES;
        }
    }];
    
    return operation;
}

#pragma mark - lazy load
- (NSMutableArray<mixDownloadOperation *> *)operations {
    
    if (!_operations) {
        _operations = [NSMutableArray array];
        [self addOperationsFromPlist];
    }
    return _operations;
}

- (void)addOperationsFromPlist {
    
    [self.operations removeAllObjects];
    
    NSMutableArray *operations = [[mixDownloadManager shareManager] getAllOperation];
    for (mixDownloadOperation *operationPlist in operations) {
        
        // 1、任务列表里取任务
        mixDownloadOperation *operation = [self operationWithUrl:operationPlist.url];
        
        // 2、本地plist文件里提取的任务
        if (!operation) {
            NSDictionary *dict = [mixDownloadCacheManager queryFileInfoWithUrl:operationPlist.url];
            operation = [mixDownloadOperation mj_objectWithKeyValues:dict];
        }

        // 3、本地plist文件里提取的任务不存在dataTask
        if(operation){
            if (!operation.dataTask) {
                operation.dataTask = [self.session mix_downloadDataTaskWithURLString:operation.url startSize:operation.currentSize];
                operation.handle = [NSFileHandle fileHandleForWritingAtPath:operation.fullPath];

                [self.operations addObject:operation];
            }
        }
        else{
            HLog(@"%@ --- 没找到",operationPlist.url)
        }
    }
}
@end