duoshoubang/FirstLink/Compoments/文件下载/FKDownloadRe...

//
//  FKRemotefileDownload.m
//  FirstLink
//
//  Created by ascii on 16/1/8.
//  Copyright © 2016年 FirstLink. All rights reserved.
//

#import "FKDownloadRemotefile.h"

#import "FKDownloadRequest.h"
#import "FKDownloadStore.h"

#import "FLRequestHelper.h"

#import "SSZipArchive.h"

@interface FKDownloadRemotefile ()


@end


@implementation FKDownloadRemotefile

+ (FKDownloadRemotefile *)sharedInstance {
    static FKDownloadRemotefile *sharedRemotefileDownloadInstance = nil;
    
    static dispatch_once_t once_token;
    dispatch_once(&once_token, ^{
        sharedRemotefileDownloadInstance = [[self alloc] init];
    });
    
    return sharedRemotefileDownloadInstance;
}

+ (void)asyncDownloadReactNativeSuccess:(void (^)())success
                                failure:(void (^)(NSError *))failure {
    NSString *urlString = [NSString stringWithFormat:@"%@/link-site/api/config/get_react_native_file.json", [[FKServerUtil sharedInstance] apiServer]];
    
    [[FLDataCenter sharedDataCenter] POST:urlString
                               parameters:[FLRequestHelper commonParamaterForLogin]
                                  success:^(MSGHeader *header, id responseObject)
     {
         if ([header.code intValue] == RESPONSE_MSG_NORMAL) {
             [FKDownloadRemotefile parseReactNativeResponse:responseObject
                                                    success:success
                                                    failure:failure];
         } else {
             failure(nil);
         }
     } failure:^(MSGHeader *header, NSError *error) {
         failure(error);
     }];
}

+ (void)parseReactNativeResponse:(id)response
                         success:(void (^)())success
                         failure:(void (^)(NSError *))failure {
    NSString *dirPath = [FKDownloadStore directoryPath:REACTNATIVE_DIRECTORY_NAME];
    
    if ([response isKindOfClass:[NSDictionary class]]) {
        if (response[@"data"][@"file_info"] != [NSNull null]) {
            NSDictionary *fileInfo = response[@"data"][@"file_info"];
            
            NSString *remoteFileURL = fileInfo[@"file_url"];
            NSString *remoteFileMd5 = fileInfo[@"md5"];
            
            NSString *localFilePath = [FKDownloadStore firstFilePathInDirectoryPath:dirPath];
            if (remoteFileMd5.length > 0 && remoteFileURL.length > 0 && ![remoteFileMd5 isEqualToString:localFilePath.lastPathComponent]) {
                dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
                    NSError *error;
                    
                    NSURL *url = [NSURL URLWithString:remoteFileURL];
                    NSData *content = [NSData dataWithContentsOfURL:url options:0 error:&error];
                    
                    if (!error) {
                        [FKDownloadStore makeDirectory:REACTNATIVE_DIRECTORY_NAME];
                        [FKDownloadStore removeFilesInDirectoryPath:dirPath];
                        
                        // save content to local path
                        NSString *zipPath = [NSString stringWithFormat:@"%@/%@.zip", dirPath, remoteFileMd5];
                        [content writeToFile:zipPath options:0 error:&error];
                        
                        if (!error) {
                            [SSZipArchive unzipFileAtPath:zipPath toDestination:dirPath];
                            [FKDownloadStore removeFileAtPath:zipPath];
                            
                            NSString *upzipFilePath = [FKDownloadStore firstFilePathInDirectoryPath:dirPath];
                            NSString *renameFilePath = [dirPath stringByAppendingPathComponent:remoteFileMd5];
                            
                            [FKDownloadStore renameFileAtPath:upzipFilePath toPath:renameFilePath];
                            
                            NSString *renamedFileMd5 = [FKDownloadStore md5OfFileAtPath:renameFilePath];
                            
                            if ([remoteFileMd5 isEqualToString:renamedFileMd5]) {
                                dispatch_async(dispatch_get_main_queue(), ^{
                                    success();
                                });
                            } else {
                                [FKDownloadStore removeFilesInDirectoryPath:dirPath];
                                dispatch_async(dispatch_get_main_queue(), ^{
                                    failure(nil);
                                });
                            }
                            return;
                        } else {
                            [FKDownloadStore removeFilesInDirectoryPath:dirPath];
                        }
                    }
                    dispatch_async(dispatch_get_main_queue(), ^{
                        failure(nil);
                    });
                });
            } else {
                success();
            }
        } else {
            [FKDownloadStore removeFilesInDirectoryPath:dirPath];
            success();
        }
    } else {
        failure(nil);
    }
}

@end