JSJP_Student/jiaPei/Utils/SingletonManger/RQDownloadManager/RQDownloadModel.m

//
//  RQDownloadModel.m
//  TEST
//
//  Created by 张嵘 on 2018/10/22.
//  Copyright © 2018 张嵘. All rights reserved.
//

#import "RQDownloadModel.h"
#import "RQDownloadHeader.h"

@implementation RQDownloadModel
- (instancetype)initWithFMResultSet:(FMResultSet *)resultSet {
	if (!resultSet) return nil;

	_vid = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"vid"]];
	_subject = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"subject"]];
	_urlString = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"urlString"]];
	_title = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"title"]];
	_imageUrl = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"imageUrl"]];
	_content = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"content"]];
	_fileName = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"fileName"]];
	_resumeData = [resultSet dataForColumn:@"resumeData"];
	_fileTotalSize = [[resultSet objectForColumn:@"fileTotalSize"] integerValue];
	_fileDownloadSize = [[resultSet objectForColumn:@"fileDownloadSize"] integerValue];
	_progress = [[resultSet objectForColumn:@"progress"] floatValue];
	_status = [[resultSet objectForColumn:@"status"] integerValue];
	_statusText = [NSString stringWithFormat:@"%@", [resultSet objectForColumn:@"statusText"]];
	_lastSpeedTime = [[resultSet objectForColumn:@"lastSpeedTime"] integerValue];
	_intervalFileSize = [[resultSet objectForColumn:@"intervalFileSize"] integerValue];
	_lastStateTime = [[resultSet objectForColumn:@"lastStateTime"] integerValue];
	_destinationPath = [NSString stringWithFormat:@"%@",[resultSet objectForColumn:@"destinationPath"]];
	return self;
}

- (NSString *)vid {
	if (!_vid) {
		_vid = [NSString stringWithFormat:@"科目%@-%@--%@",_subject,_videoId,_title];
	}
	return _vid;
}

- (NSString *)fileName{
	if (!_fileName) {
		NSTimeInterval timeInterval = [[NSDate date]timeIntervalSince1970];
		//解决多个任务同时开始时 文件重名问题
		NSString *timeStr = [NSString stringWithFormat:@"%.6f",timeInterval];
		timeStr = [timeStr stringByReplacingOccurrencesOfString:@"." withString:@"_"];
		_fileName = [NSString stringWithFormat:@"%@--%@",_title? :@"无文件名",timeStr];
	}
	return _fileName;
}

- (NSString *)destinationPath {
	_destinationPath = [[[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingString:self.fileName] stringByAppendingString:self.fileFormat];
	return _destinationPath;
}

- (NSString *)fileFormat{
	if (!_fileFormat && _urlString) {
		NSArray *urlArr = [_urlString componentsSeparatedByString:@"."];
		if (urlArr && urlArr.count>1) {
			self.fileFormat = [@"." stringByAppendingString:[urlArr lastObject]];
		}
	}
	return _fileFormat;
}

- (void)setProgress:(CGFloat)progress {
	if (_progress != progress) {
		_progress = progress;
	}
	if (self.progressChanged) {
		self.progressChanged(self);
	}
}

- (void)setStatus:(RQDownloadStatus)status {
	if (_status != status) {
		_status = status;
		[self setStatusTextWith:_status];
		
		if (self.statusChanged) {
			self.statusChanged(self);
		}
	}
}

- (void)setUrlString:(NSString *)urlString {
	_urlString = urlString;
	
	NSArray *urlArr = [_urlString componentsSeparatedByString:@"."];
	if (urlArr && urlArr.count>1) {
		self.fileFormat = [@"." stringByAppendingString:[urlArr lastObject]];
	}
}

- (void)setStatusTextWith:(RQDownloadStatus)status{
	_status = status;
	NSLog(@"%@%@==%@",self.fileName,self.fileFormat,self.statusText);
}

- (NSString *)statusText {
	switch (self.status) {
		case RQDownloadStatus_None: {
			return  @"未缓存";
		}
		case RQDownloadStatus_Running: {
			return _statusText? : @"正在下载";
		}
		case RQDownloadStatus_Suspended: {
			return @"暂停下载";
		}
		case RQDownloadStatus_Failed: {
			return @"下载失败";
		}
		case RQDownloadStatus_Cancel: {
			return @"取消下载";
		}
		case RQDownloadStatus_Waiting: {
			return @"等待下载";
		}
		case RQDownloadStatus_Completed: {
			return @"下载完成";
		}
			
		default: {
			return @"未缓存";
		}
	}
}

+ (NSArray *)mj_ignoredCodingPropertyNames {
	
	return @[@"statusChanged",@"progressChanged",@"stream",@"operation"];
}



- (NSUInteger)fileDownloadSize {
	// 获取文件下载长度
	NSInteger fileDownloadSize = [[[NSFileManager defaultManager] attributesOfItemAtPath:self.destinationPath error:nil][NSFileSize] integerValue];
	_fileDownloadSize = fileDownloadSize;
	return _fileDownloadSize;
}



- (NSOutputStream *)stream {
	if (!_stream) {
		_stream =  [NSOutputStream outputStreamToFileAtPath:self.destinationPath append:YES];
	}
	return _stream;
}

- (BOOL)isFinished {
	return (self.fileTotalSize == self.fileDownloadSize) && (self.fileTotalSize != 0);
}



@end