rn-fetch-blob/src/ios/RNFetchBlob/RNFetchBlob.m

//
//  RNFetchBlob.m
//
//  Created by wkh237 on 2016/4/28.
//

#import "RNFetchBlob.h"
#import "RCTConvert.h"
#import "RCTLog.h"
#import "RCTBridge.h"
#import "RCTEventDispatcher.h"
#import "RNFetchBlobFS.h"
#import "RNFetchBlobNetwork.h"
#import "RNFetchBlobConst.h"
#import "RNFetchBlobReqBuilder.h"


////////////////////////////////////////
//
//  Exported native methods
//
////////////////////////////////////////

#pragma mark RNFetchBlob exported methods

@implementation RNFetchBlob

@synthesize filePathPrefix;
@synthesize documentController;
@synthesize bridge = _bridge;

- (dispatch_queue_t) methodQueue {
    return dispatch_queue_create("RNFetchBlob.queue", DISPATCH_QUEUE_SERIAL);
}

RCT_EXPORT_MODULE();

- (id) init {
    self = [super init];
    self.filePathPrefix = FILE_PREFIX;
    BOOL isDir;
    // if temp folder not exists, create one
    if(![[NSFileManager defaultManager] fileExistsAtPath: [RNFetchBlobFS getTempPath] isDirectory:&isDir]) {
        [[NSFileManager defaultManager] createDirectoryAtPath:[RNFetchBlobFS getTempPath] withIntermediateDirectories:YES attributes:nil error:NULL];
    }
    return self;
}

- (NSDictionary *)constantsToExport
{
    return @{
             @"DocumentDir": [RNFetchBlobFS getDocumentDir],
             @"CacheDir" : [RNFetchBlobFS getCacheDir]
             };
}

// Fetch blob data request
RCT_EXPORT_METHOD(fetchBlobForm:(NSDictionary *)options
                  taskId:(NSString *)taskId
                  method:(NSString *)method
                  url:(NSString *)url
                  headers:(NSDictionary *)headers
                  form:(NSArray *)form
                  callback:(RCTResponseSenderBlock)callback)
{

    [RNFetchBlobReqBuilder buildMultipartRequest:options taskId:taskId method:method url:url headers:headers form:form onComplete:^(__weak NSURLRequest *req, long bodyLength) {
        // send HTTP request
        RNFetchBlobNetwork * utils = [[RNFetchBlobNetwork alloc] init];
        [utils sendRequest:options contentLength:bodyLength bridge:self.bridge taskId:taskId withRequest:req callback:callback];
    }];

}

// Fetch blob data request
RCT_EXPORT_METHOD(fetchBlob:(NSDictionary *)options
                  taskId:(NSString *)taskId
                  method:(NSString *)method
                  url:(NSString *)url
                  headers:(NSDictionary *)headers
                  body:(NSString *)body callback:(RCTResponseSenderBlock)callback)
{
    [RNFetchBlobReqBuilder buildOctetRequest:options taskId:taskId method:method url:url headers:headers body:body onComplete:^(NSURLRequest *req, long bodyLength) {
        // send HTTP request
        __block RNFetchBlobNetwork * utils = [[RNFetchBlobNetwork alloc] init];
        [utils sendRequest:options contentLength:bodyLength bridge:self.bridge taskId:taskId withRequest:req callback:callback];
    }];
}

RCT_EXPORT_METHOD(createFile:(NSString *)path data:(NSString *)data encoding:(NSString *)encoding callback:(RCTResponseSenderBlock)callback) {

    NSFileManager * fm = [NSFileManager defaultManager];
    NSData * fileContent = nil;

    if([[encoding lowercaseString] isEqualToString:@"utf8"]) {
        fileContent = [[NSData alloc] initWithData:[data dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES]];
    }
    else if([[encoding lowercaseString] isEqualToString:@"base64"]) {
        fileContent = [[NSData alloc] initWithBase64EncodedData:data options:0];
    }
    else if([[encoding lowercaseString] isEqualToString:@"uri"]) {
        NSString * orgPath = [data stringByReplacingOccurrencesOfString:FILE_PREFIX withString:@""];
        fileContent = [[NSData alloc] initWithContentsOfFile:orgPath];
    }
    else {
        fileContent = [[NSData alloc] initWithData:[data dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]];
    }

    BOOL success = [fm createFileAtPath:path contents:fileContent attributes:NULL];
    if(success == YES)
        callback(@[[NSNull null]]);
    else
        callback(@[[NSString stringWithFormat:@"failed to create new file at path %@ please ensure the folder exists"]]);

}

// method for create file with ASCII content
RCT_EXPORT_METHOD(createFileASCII:(NSString *)path data:(NSArray *)dataArray callback:(RCTResponseSenderBlock)callback) {

    NSFileManager * fm = [NSFileManager defaultManager];
    NSMutableData * fileContent = [NSMutableData alloc];
    // prevent stack overflow, alloc on heap
    char * bytes = (char*) malloc([dataArray count]);

    for(int i = 0; i < dataArray.count; i++) {
        bytes[i] = [[dataArray objectAtIndex:i] charValue];
    }
    [fileContent appendBytes:bytes length:dataArray.count];
    BOOL success = [fm createFileAtPath:path contents:fileContent attributes:NULL];
    free(bytes);
    if(success == YES)
        callback(@[[NSNull null]]);
    else
        callback(@[[NSString stringWithFormat:@"failed to create new file at path %@ please ensure the folder exists"]]);

}


RCT_EXPORT_METHOD(exists:(NSString *)path callback:(RCTResponseSenderBlock)callback) {
    BOOL isDir = NO;
    BOOL exists = NO;
    exists = [[NSFileManager defaultManager] fileExistsAtPath:path isDirectory: &isDir];
    callback(@[@(exists), @(isDir)]);

}

RCT_EXPORT_METHOD(writeFile:(NSString *)path encoding:(NSString *)encoding data:(NSString *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject {
    
    [RNFetchBlobFS writeFile:path encoding:[NSString stringWithString:encoding] data:data append:append resolver:resolve rejecter:reject];
})

RCT_EXPORT_METHOD(writeFileArray:(NSString *)path data:(NSArray *)data append:(BOOL)append resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject {
    [RNFetchBlobFS writeFileArray:path data:data append:append resolver:resolve rejecter:reject];
})

RCT_EXPORT_METHOD(writeStream:(NSString *)path withEncoding:(NSString *)encoding appendData:(BOOL)append callback:(RCTResponseSenderBlock)callback) {
    RNFetchBlobFS * fileStream = [[RNFetchBlobFS alloc] initWithBridgeRef:self.bridge];
    NSFileManager * fm = [NSFileManager defaultManager];
    BOOL isDir = nil;
    BOOL exist = [fm fileExistsAtPath:path isDirectory:&isDir];
    if( exist == NO || isDir == YES) {
        callback(@[[NSString stringWithFormat:@"target path `%@` may not exists or it's a folder", path]]);
        return;
    }
    NSString * streamId = [fileStream openWithPath:path encode:encoding appendData:append];
    callback(@[[NSNull null], streamId]);
}

RCT_EXPORT_METHOD(writeArrayChunk:(NSString *)streamId withArray:(NSArray *)dataArray callback:(RCTResponseSenderBlock) callback) {
    RNFetchBlobFS *fs = [[RNFetchBlobFS getFileStreams] valueForKey:streamId];
    char * bytes = (char *) malloc([dataArray count]);
    for(int i = 0; i < dataArray.count; i++) {
        bytes[i] = [[dataArray objectAtIndex:i] charValue];
    }
    NSMutableData * data = [NSMutableData alloc];
    [data appendBytes:bytes length:dataArray.count];
    [fs write:data];
    free(bytes);
    callback(@[[NSNull null]]);
}

RCT_EXPORT_METHOD(writeChunk:(NSString *)streamId withData:(NSString *)data callback:(RCTResponseSenderBlock) callback) {
    RNFetchBlobFS *fs = [[RNFetchBlobFS getFileStreams] valueForKey:streamId];
    [fs writeEncodeChunk:data];
    callback(@[[NSNull null]]);
}

RCT_EXPORT_METHOD(closeStream:(NSString *)streamId callback:(RCTResponseSenderBlock) callback) {
    RNFetchBlobFS *fs = [[RNFetchBlobFS getFileStreams] valueForKey:streamId];
    [fs closeOutStream];
    callback(@[[NSNull null], @YES]);
}

RCT_EXPORT_METHOD(unlink:(NSString *)path callback:(RCTResponseSenderBlock) callback) {
    NSError * error = nil;
    NSString * tmpPath = nil;
    [[NSFileManager defaultManager] removeItemAtPath:path error:&error];
    if(error == nil)
        callback(@[[NSNull null]]);
    else
        callback(@[[NSString stringWithFormat:@"failed to unlink file or path at %@", path]]);
}

RCT_EXPORT_METHOD(removeSession:(NSArray *)paths callback:(RCTResponseSenderBlock) callback) {
    NSError * error = nil;
    NSString * tmpPath = nil;

    for(NSString * path in paths) {
        [[NSFileManager defaultManager] removeItemAtPath:path error:&error];
        if(error != nil) {
            callback(@[[NSString stringWithFormat:@"failed to remove session path at %@", path]]);
            return;
        }
    }
    callback(@[[NSNull null]]);

}

RCT_EXPORT_METHOD(ls:(NSString *)path callback:(RCTResponseSenderBlock) callback) {
    NSFileManager* fm = [NSFileManager defaultManager];
    BOOL exist = nil;
    BOOL isDir = nil;
    exist = [fm fileExistsAtPath:path isDirectory:&isDir];
    if(exist == NO || isDir == NO) {
        callback(@[[NSString stringWithFormat:@"failed to list path `%@` for it is not exist or it is not a folder", path]]);
        return ;
    }
    NSError * error = nil;
    NSArray * result = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:&error];

    if(error == nil)
        callback(@[[NSNull null], result == nil ? [NSNull null] :result ]);
    else
        callback(@[[error localizedDescription], [NSNull null]]);

}

RCT_EXPORT_METHOD(stat:(NSString *)path callback:(RCTResponseSenderBlock) callback) {
    NSFileManager* fm = [NSFileManager defaultManager];
    BOOL exist = nil;
    BOOL isDir = nil;
    NSError * error = nil;

    path = [RNFetchBlobFS getPathOfAsset:path];

    exist = [fm fileExistsAtPath:path isDirectory:&isDir];
    if(exist == NO) {
        callback(@[[NSString stringWithFormat:@"failed to list path `%@` for it is not exist or it is not exist", path]]);
        return ;
    }
    NSData * res = [RNFetchBlobFS stat:path error:&error];

    if(error == nil)
        callback(@[[NSNull null], res]);
    else
        callback(@[[error localizedDescription], [NSNull null]]);

}

RCT_EXPORT_METHOD(lstat:(NSString *)path callback:(RCTResponseSenderBlock) callback) {
    NSFileManager* fm = [NSFileManager defaultManager];
    BOOL exist = nil;
    BOOL isDir = nil;

    path = [RNFetchBlobFS getPathOfAsset:path];

    exist = [fm fileExistsAtPath:path isDirectory:&isDir];
    if(exist == NO) {
        callback(@[[NSString stringWithFormat:@"failed to list path `%@` for it is not exist or it is not exist", path]]);
        return ;
    }
    NSError * error = nil;
    NSArray * files = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:&error];

    NSMutableArray * res = [[NSMutableArray alloc] init];
    if(isDir == YES) {
        for(NSString * p in files) {
            NSString * filePath = [NSString stringWithFormat:@"%@/%@", path, p];
            [res addObject:[RNFetchBlobFS stat:filePath error:&error]];
        }
    }
    else {
        [res addObject:[RNFetchBlobFS stat:path error:&error]];
    }

    if(error == nil)
        callback(@[[NSNull null], res == nil ? [NSNull null] :res ]);
    else
        callback(@[[error localizedDescription], [NSNull null]]);

}

RCT_EXPORT_METHOD(cp:(NSString *)path toPath:(NSString *)dest callback:(RCTResponseSenderBlock) callback) {
    NSError * error = nil;
    path = [RNFetchBlobFS getPathOfAsset:path];
    BOOL result = [[NSFileManager defaultManager] copyItemAtURL:[NSURL fileURLWithPath:path] toURL:[NSURL fileURLWithPath:dest] error:&error];

    if(error == nil)
        callback(@[[NSNull null], @YES]);
    else
        callback(@[[error localizedDescription], @NO]);

}

RCT_EXPORT_METHOD(mv:(NSString *)path toPath:(NSString *)dest callback:(RCTResponseSenderBlock) callback) {
    NSError * error = nil;
    BOOL result = [[NSFileManager defaultManager] moveItemAtURL:[NSURL fileURLWithPath:path] toURL:[NSURL fileURLWithPath:dest] error:&error];

    if(error == nil)
        callback(@[[NSNull null], @YES]);
    else
        callback(@[[error localizedDescription], @NO]);

}

RCT_EXPORT_METHOD(mkdir:(NSString *)path callback:(RCTResponseSenderBlock) callback) {
    if([RNFetchBlobFS exists:path]) {
        callback(@[@"mkdir failed, folder already exists"]);
        return;
    }
    else
        [RNFetchBlobFS mkdir:path];
    callback(@[[NSNull null]]);
}

RCT_EXPORT_METHOD(readFile:(NSString *)path encoding:(NSString *)encoding resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject {

    [RNFetchBlobFS readFile:path encoding:encoding resolver:resolve rejecter:reject onComplete:nil];
})

RCT_EXPORT_METHOD(readStream:(NSString *)path withEncoding:(NSString *)encoding bufferSize:(int)bufferSize) {

    RNFetchBlobFS *fileStream = [[RNFetchBlobFS alloc] initWithBridgeRef:self.bridge];
    if(bufferSize == nil) {
        if([[encoding lowercaseString] isEqualToString:@"base64"])
            bufferSize = 4095;
        else
            bufferSize = 4096;
    }
    // read asset stream
    [fileStream readWithPath:path useEncoding:encoding bufferSize:bufferSize];
}

RCT_EXPORT_METHOD(getEnvironmentDirs:(RCTResponseSenderBlock) callback) {

    callback(@[
               [RNFetchBlobFS getDocumentDir],
               [RNFetchBlobFS getCacheDir],
               ]);
}

RCT_EXPORT_METHOD(cancelRequest:(NSString *)taskId callback:(RCTResponseSenderBlock)callback) {
    [RNFetchBlobNetwork cancelRequest:taskId];
    callback(@[[NSNull null], taskId]);

}

RCT_EXPORT_METHOD(enableProgressReport:(NSString *)taskId {
    [RNFetchBlobNetwork enableProgressReport:taskId];
})

RCT_EXPORT_METHOD(enableUploadProgressReport:(NSString *)taskId {
    [RNFetchBlobNetwork enableUploadProgress:taskId];
})

RCT_EXPORT_METHOD(slice:(NSString *)src dest:(NSString *)dest start:(nonnull NSNumber *)start end:(nonnull NSNumber *)end resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
{
    [RNFetchBlobFS slice:src dest:dest start:start end:end encode:@"" resolver:resolve rejecter:reject];
})

RCT_EXPORT_METHOD(openDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
{
    
    NSURL * url = [[NSURL alloc] initWithString:uri];
    documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
    UIViewController *rootCtrl = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
    documentController.delegate = self;
    if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
        [documentController  presentOpenInMenuFromRect:rootCtrl.view.bounds inView:rootCtrl.view animated:YES];
        resolve(@[[NSNull null]]);
    } else {
        reject(@"RNFetchBlob could not open document", @"scheme is not supported", nil);
    }
})

# pragma mark - open file with UIDocumentInteractionController and delegate

RCT_EXPORT_METHOD(previewDocument:(NSString*)uri scheme:(NSString *)scheme resolver:(RCTPromiseResolveBlock)resolve rejecter:(RCTPromiseRejectBlock)reject
{
    
    NSURL * url = [[NSURL alloc] initWithString:uri];
    documentController = [UIDocumentInteractionController interactionControllerWithURL:url];
    documentController.delegate = self;
    
    if(scheme == nil || [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:scheme]]) {
        [documentController presentPreviewAnimated:YES];
        resolve(@[[NSNull null]]);
    } else {
        reject(@"RNFetchBlob could not open document", @"scheme is not supported", nil);
    }
})

- (UIViewController *) documentInteractionControllerViewControllerForPreview: (UIDocumentInteractionController *) controller {
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    return window.rootViewController;
}


#pragma mark RNFetchBlob private methods


@end