1 files changed, 253 insertions, 0 deletions
diff --git a/plugins/cordova-plugin-file/src/ios/CDVAssetLibraryFilesystem.m b/plugins/cordova-plugin-file/src/ios/CDVAssetLibraryFilesystem.m
new file mode 100644
index 00000000..0b95fac3
--- /dev/null
+++ b/plugins/cordova-plugin-file/src/ios/CDVAssetLibraryFilesystem.m
@@ -0,0 +1,253 @@
+/*
+ Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements.  See the NOTICE file
+ distributed with this work for additional information
+ regarding copyright ownership.  The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License.  You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied.  See the License for the
+ specific language governing permissions and limitations
+ under the License.
+ */
+
+#import "CDVFile.h"
+#import "CDVAssetLibraryFilesystem.h"
+#import <Cordova/CDV.h>
+#import <AssetsLibrary/ALAsset.h>
+#import <AssetsLibrary/ALAssetRepresentation.h>
+#import <AssetsLibrary/ALAssetsLibrary.h>
+#import <MobileCoreServices/MobileCoreServices.h>
+
+NSString* const kCDVAssetsLibraryPrefix = @"assets-library://";
+NSString* const kCDVAssetsLibraryScheme = @"assets-library";
+
+@implementation CDVAssetLibraryFilesystem
+@synthesize name=_name, urlTransformer;
+
+
+/*
+ The CDVAssetLibraryFilesystem works with resources which are identified
+ by iOS as
+   asset-library://<path>
+ and represents them internally as URLs of the form
+   cdvfile://localhost/assets-library/<path>
+ */
+
+- (NSURL *)assetLibraryURLForLocalURL:(CDVFilesystemURL *)url
+{
+    if ([url.url.scheme isEqualToString:kCDVFilesystemURLPrefix]) {
+        NSString *path = [[url.url absoluteString] substringFromIndex:[@"cdvfile://localhost/assets-library" length]];
+        return [NSURL URLWithString:[NSString stringWithFormat:@"assets-library:/%@", path]];
+    }
+    return url.url;
+}
+
+- (CDVPluginResult *)entryForLocalURI:(CDVFilesystemURL *)url
+{
+    NSDictionary* entry = [self makeEntryForLocalURL:url];
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsDictionary:entry];
+}
+
+- (NSDictionary *)makeEntryForLocalURL:(CDVFilesystemURL *)url {
+    return [self makeEntryForPath:url.fullPath isDirectory:NO];
+}
+
+- (NSDictionary*)makeEntryForPath:(NSString*)fullPath isDirectory:(BOOL)isDir
+{
+    NSMutableDictionary* dirEntry = [NSMutableDictionary dictionaryWithCapacity:5];
+    NSString* lastPart = [fullPath lastPathComponent];
+    if (isDir && ![fullPath hasSuffix:@"/"]) {
+        fullPath = [fullPath stringByAppendingString:@"/"];
+    }
+    [dirEntry setObject:[NSNumber numberWithBool:!isDir]  forKey:@"isFile"];
+    [dirEntry setObject:[NSNumber numberWithBool:isDir]  forKey:@"isDirectory"];
+    [dirEntry setObject:fullPath forKey:@"fullPath"];
+    [dirEntry setObject:lastPart forKey:@"name"];
+    [dirEntry setObject:self.name forKey: @"filesystemName"];
+    
+    NSURL* nativeURL = [NSURL URLWithString:[NSString stringWithFormat:@"assets-library:/%@",fullPath]];
+    if (self.urlTransformer) {
+        nativeURL = self.urlTransformer(nativeURL);
+    }
+    dirEntry[@"nativeURL"] = [nativeURL absoluteString];
+
+    return dirEntry;
+}
+
+/* helper function to get the mimeType from the file extension
+ * IN:
+ *	NSString* fullPath - filename (may include path)
+ * OUT:
+ *	NSString* the mime type as type/subtype.  nil if not able to determine
+ */
++ (NSString*)getMimeTypeFromPath:(NSString*)fullPath
+{
+    NSString* mimeType = nil;
+
+    if (fullPath) {
+        CFStringRef typeId = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (__bridge CFStringRef)[fullPath pathExtension], NULL);
+        if (typeId) {
+            mimeType = (__bridge_transfer NSString*)UTTypeCopyPreferredTagWithClass(typeId, kUTTagClassMIMEType);
+            if (!mimeType) {
+                // special case for m4a
+                if ([(__bridge NSString*)typeId rangeOfString : @"m4a-audio"].location != NSNotFound) {
+                    mimeType = @"audio/mp4";
+                } else if ([[fullPath pathExtension] rangeOfString:@"wav"].location != NSNotFound) {
+                    mimeType = @"audio/wav";
+                } else if ([[fullPath pathExtension] rangeOfString:@"css"].location != NSNotFound) {
+                    mimeType = @"text/css";
+                }
+            }
+            CFRelease(typeId);
+        }
+    }
+    return mimeType;
+}
+
+- (id)initWithName:(NSString *)name
+{
+    if (self) {
+        _name = name;
+    }
+    return self;
+}
+
+- (CDVPluginResult *)getFileForURL:(CDVFilesystemURL *)baseURI requestedPath:(NSString *)requestedPath options:(NSDictionary *)options
+{
+    // return unsupported result for assets-library URLs
+   return [CDVPluginResult resultWithStatus:CDVCommandStatus_MALFORMED_URL_EXCEPTION messageAsString:@"getFile not supported for assets-library URLs."];
+}
+
+- (CDVPluginResult*)getParentForURL:(CDVFilesystemURL *)localURI
+{
+    // we don't (yet?) support getting the parent of an asset
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:NOT_READABLE_ERR];
+}
+
+- (CDVPluginResult*)setMetadataForURL:(CDVFilesystemURL *)localURI withObject:(NSDictionary *)options
+{
+    // setMetadata doesn't make sense for asset library files
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];
+}
+
+- (CDVPluginResult *)removeFileAtURL:(CDVFilesystemURL *)localURI
+{
+    // return error for assets-library URLs
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:INVALID_MODIFICATION_ERR];
+}
+
+- (CDVPluginResult *)recursiveRemoveFileAtURL:(CDVFilesystemURL *)localURI
+{
+    // return error for assets-library URLs
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_MALFORMED_URL_EXCEPTION messageAsString:@"removeRecursively not supported for assets-library URLs."];
+}
+
+- (CDVPluginResult *)readEntriesAtURL:(CDVFilesystemURL *)localURI
+{
+    // return unsupported result for assets-library URLs
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_MALFORMED_URL_EXCEPTION messageAsString:@"readEntries not supported for assets-library URLs."];
+}
+
+- (CDVPluginResult *)truncateFileAtURL:(CDVFilesystemURL *)localURI atPosition:(unsigned long long)pos
+{
+    // assets-library files can't be truncated
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:NO_MODIFICATION_ALLOWED_ERR];
+}
+
+- (CDVPluginResult *)writeToFileAtURL:(CDVFilesystemURL *)localURL withData:(NSData*)encData append:(BOOL)shouldAppend
+{
+    // text can't be written into assets-library files
+    return [CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:NO_MODIFICATION_ALLOWED_ERR];
+}
+
+- (void)copyFileToURL:(CDVFilesystemURL *)destURL withName:(NSString *)newName fromFileSystem:(NSObject<CDVFileSystem> *)srcFs atURL:(CDVFilesystemURL *)srcURL copy:(BOOL)bCopy callback:(void (^)(CDVPluginResult *))callback
+{
+    // Copying to an assets library file is not doable, since we can't write it.
+    CDVPluginResult *result = [CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:INVALID_MODIFICATION_ERR];
+    callback(result);
+}
+
+- (NSString *)filesystemPathForURL:(CDVFilesystemURL *)url
+{
+    NSString *path = nil;
+    if ([[url.url scheme] isEqualToString:kCDVAssetsLibraryScheme]) {
+        path = [url.url path];
+    } else {
+       path = url.fullPath;
+    }
+    if ([path hasSuffix:@"/"]) {
+      path = [path substringToIndex:([path length]-1)];
+    }
+    return path;
+}
+
+- (void)readFileAtURL:(CDVFilesystemURL *)localURL start:(NSInteger)start end:(NSInteger)end callback:(void (^)(NSData*, NSString* mimeType, CDVFileError))callback
+{
+    ALAssetsLibraryAssetForURLResultBlock resultBlock = ^(ALAsset* asset) {
+        if (asset) {
+            // We have the asset!  Get the data and send it off.
+            ALAssetRepresentation* assetRepresentation = [asset defaultRepresentation];
+            NSUInteger size = (end > start) ? (end - start) : [assetRepresentation size];
+            Byte* buffer = (Byte*)malloc(size);
+            NSUInteger bufferSize = [assetRepresentation getBytes:buffer fromOffset:start length:size error:nil];
+            NSData* data = [NSData dataWithBytesNoCopy:buffer length:bufferSize freeWhenDone:YES];
+            NSString* MIMEType = (__bridge_transfer NSString*)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)[assetRepresentation UTI], kUTTagClassMIMEType);
+
+            callback(data, MIMEType, NO_ERROR);
+        } else {
+            callback(nil, nil, NOT_FOUND_ERR);
+        }
+    };
+
+    ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError* error) {
+        // Retrieving the asset failed for some reason.  Send the appropriate error.
+        NSLog(@"Error: %@", error);
+        callback(nil, nil, SECURITY_ERR);
+    };
+
+    ALAssetsLibrary* assetsLibrary = [[ALAssetsLibrary alloc] init];
+    [assetsLibrary assetForURL:[self assetLibraryURLForLocalURL:localURL] resultBlock:resultBlock failureBlock:failureBlock];
+}
+
+- (void)getFileMetadataForURL:(CDVFilesystemURL *)localURL callback:(void (^)(CDVPluginResult *))callback
+{
+    // In this case, we need to use an asynchronous method to retrieve the file.
+    // Because of this, we can't just assign to `result` and send it at the end of the method.
+    // Instead, we return after calling the asynchronous method and send `result` in each of the blocks.
+    ALAssetsLibraryAssetForURLResultBlock resultBlock = ^(ALAsset* asset) {
+        if (asset) {
+            // We have the asset!  Populate the dictionary and send it off.
+            NSMutableDictionary* fileInfo = [NSMutableDictionary dictionaryWithCapacity:5];
+            ALAssetRepresentation* assetRepresentation = [asset defaultRepresentation];
+            [fileInfo setObject:[NSNumber numberWithUnsignedLongLong:[assetRepresentation size]] forKey:@"size"];
+            [fileInfo setObject:localURL.fullPath forKey:@"fullPath"];
+            NSString* filename = [assetRepresentation filename];
+            [fileInfo setObject:filename forKey:@"name"];
+            [fileInfo setObject:[CDVAssetLibraryFilesystem getMimeTypeFromPath:filename] forKey:@"type"];
+            NSDate* creationDate = [asset valueForProperty:ALAssetPropertyDate];
+            NSNumber* msDate = [NSNumber numberWithDouble:[creationDate timeIntervalSince1970] * 1000];
+            [fileInfo setObject:msDate forKey:@"lastModifiedDate"];
+
+            callback([CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsDictionary:fileInfo]);
+        } else {
+            // We couldn't find the asset.  Send the appropriate error.
+            callback([CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsInt:NOT_FOUND_ERR]);
+        }
+    };
+    ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError* error) {
+        // Retrieving the asset failed for some reason.  Send the appropriate error.
+        callback([CDVPluginResult resultWithStatus:CDVCommandStatus_IO_EXCEPTION messageAsString:[error localizedDescription]]);
+    };
+
+    ALAssetsLibrary* assetsLibrary = [[ALAssetsLibrary alloc] init];
+    [assetsLibrary assetForURL:[self assetLibraryURLForLocalURL:localURL] resultBlock:resultBlock failureBlock:failureBlock];
+    return;
+}
+@end