Added basic support for writing contents to a file

Author: johanneslumpe

FS.ios.js

@@ -7,6 +7,7 @@ var base64 = require('base-64');
 var _readDir = Promise.promisify(RNFSManager.readDir);
 var _stat = Promise.promisify(RNFSManager.stat);
 var _readFile = Promise.promisify(RNFSManager.readFile);
+var _writeFile = Promise.promisify(RNFSManager.writeFile);
 
 var convertError = (err) => {
   var error = new Error(err.description);
@@ -21,22 +22,22 @@ var RNFS = {
 
   readDir(path, rootDir) {
     return _readDir(path, rootDir)
-    .catch(convertError);
+      .catch(convertError);
   },
 
   stat(filepath) {
     return _stat(filepath)
-    .then((result) => {
-      return {
-        'ctime': new Date(result.ctime*1000),
-        'mtime': new Date(result.mtime*1000),
-        'size': result.size,
-        'mode': result.mode,
-        isFile: () => result.type === NSFileTypeRegular,
-        isDirectory: () => result.type === NSFileTypeDirectory,
-      };
-    })
-    .catch(convertError);
+      .then((result) => {
+        return {
+          'ctime': new Date(result.ctime*1000),
+          'mtime': new Date(result.mtime*1000),
+          'size': result.size,
+          'mode': result.mode,
+          isFile: () => result.type === NSFileTypeRegular,
+          isDirectory: () => result.type === NSFileTypeDirectory,
+        };
+      })
+      .catch(convertError);
   },
 
   readFile(filepath, shouldDecode) {
@@ -51,6 +52,11 @@ var RNFS = {
     return p.catch(convertError);
   },
 
+  writeFile(filepath, contents, options) {
+    return _writeFile(filepath, base64.encode(contents), options)
+      .catch(convertError);
+  },
+
   MainBundle: RNFSManager.MainBundleDirectory,
   CachesDirectory: RNFSManager.NSCachesDirectory,
   DocumentDirectory: RNFSManager.NSDocumentDirectory,

RNFSManager.m

@@ -29,54 +29,65 @@ @implementation RNFSManager
     NSArray *paths = NSSearchPathForDirectoriesInDomains(folderInt, NSUserDomainMask, YES);
     path = [paths objectAtIndex:0];
   }
-  
+
   NSFileManager *fileManager = [NSFileManager defaultManager];
   NSError *error;
   NSString * dirPath = [path stringByAppendingPathComponent:directory];
   NSArray *contents = [fileManager contentsOfDirectoryAtPath:dirPath error:&error];
-  
+
   contents = [contents mapObjectsUsingBlock:^id(id obj, NSUInteger idx) {
     return @{
       @"name": (NSString*)obj,
       @"path": [dirPath stringByAppendingPathComponent:(NSString*)obj]
     };
   }];
-  
+
   if (error) {
     return callback([self makeErrorPayload:error]);
   }
-  
+
   callback(@[[NSNull null], contents]);
 }
 
 RCT_EXPORT_METHOD(stat:(NSString*)filepath callback:(RCTResponseSenderBlock)callback){
   NSError *error;
   NSDictionary *attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:filepath error:&error];
-  //  NSLog(@"%@", attributes);
-  
+
   if (error) {
     return callback([self makeErrorPayload:error]);
   }
-  
+
   attributes = @{
-                 @"ctime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileCreationDate]],
-                 @"mtime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileModificationDate]],
-                 @"size": [attributes objectForKey:NSFileSize],
-                 @"type": [attributes objectForKey:NSFileType],
-                 @"mode": [NSNumber numberWithInteger:[[NSString stringWithFormat:@"%o", [(NSNumber*)[attributes objectForKey:NSFilePosixPermissions] integerValue]] integerValue]]
-                 };
-  
+    @"ctime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileCreationDate]],
+    @"mtime": [self dateToTimeIntervalNumber:(NSDate*)[attributes objectForKey:NSFileModificationDate]],
+    @"size": [attributes objectForKey:NSFileSize],
+    @"type": [attributes objectForKey:NSFileType],
+    @"mode": [NSNumber numberWithInteger:[[NSString stringWithFormat:@"%o", [(NSNumber*)[attributes objectForKey:NSFilePosixPermissions] integerValue]] integerValue]]
+  };
+
   callback(@[[NSNull null], attributes]);
 }
 
+RCT_EXPORT_METHOD(writeFile:(NSString*)filepath contents:(NSString*)base64Content attributes:(NSDictionary*)attributes callback:(RCTResponseSenderBlock)callback){
+
+  NSData *data = [[NSData alloc] initWithBase64EncodedString:base64Content options:NSDataBase64DecodingIgnoreUnknownCharacters];
+  BOOL success = [[NSFileManager defaultManager] createFileAtPath:filepath contents:data attributes:attributes];
+
+  if (!success) {
+    return callback(@[[NSString stringWithFormat:@"Could not write file at path %@", filepath]]);
+  }
+
+  callback(@[[NSNull null], [NSNumber numberWithBool:success]]);
+}
+
 RCT_EXPORT_METHOD(readFile:(NSString*)filepath callback:(RCTResponseSenderBlock)callback){
   NSData *content = [[NSFileManager defaultManager] contentsAtPath:filepath];
   NSString *base64Content = [content base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
   NSLog(@"%@", base64Content);
   if (!base64Content) {
     return callback(@[[NSString stringWithFormat:@"Could not read file at path %@", filepath]]);
   }
-  
+
   callback(@[[NSNull null], base64Content]);
 }