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/**
* Things to do with Phonegap files
* Mainly wrappers around their async functions to return Promises
*/
(function (FMS, Backbone, _, $) {
_.extend(FMS, {
files: {
// move a file at from a uri to a desination directory. maintains file name
moveURI: function (srcURI, newName ) {
var fileEntry;
return getFileFromURI(srcURI)
.pipe( function (file) {
fileEntry = file;
return getFileSystem();
})
.pipe( function (filesystem) {
FMS.printDebug('Filesystem returned: ' + filesystem);
return getDirectory(filesystem.root, CONFIG.FILES_DIR, {create: true});
})
.pipe( function(directory) {
return moveFile( fileEntry, directory, newName );
});
},
copyURI: function (srcURI, newName ) {
var fileEntry;
return getFileFromURI(srcURI)
.pipe( function (file) {
fileEntry = file;
return getFileSystem();
})
.pipe( function (filesystem) {
FMS.printDebug('Filesystem returned: ' + filesystem);
return getDirectory(filesystem.root, CONFIG.FILES_DIR, {create: true});
})
.pipe( function(directory) {
return copyFile( fileEntry, directory, newName );
});
},
deleteURI: function (uri) {
FMS.printDebug('Deleting URI: ' + uri);
return getFileFromURI(uri)
.pipe( function (file) {
var deletingFile = $.Deferred();
file.remove(deletingFile.resolve, deletingFile.reject);
return deletingFile;
});
},
// Delete a file from the filesystem
deleteFile: function (path) {
FMS.printDebug('Deleting file: ' + path);
// Turn path into a filename
var filename = path.split('/').pop();
return getFileSystem()
.pipe(function (filesystem) {
return getDirectory(filesystem.root, CONFIG.FILES_DIR);
})
.pipe(function (directory) {
return getFile(directory, filename, {});
})
.pipe(function (file) {
var deletingFile = $.Deferred();
file.remove(deletingFile.resolve, deletingFile.reject);
return deletingFile;
});
}
}
});
// Wrap the async Phonegap way of getting a filesystem in a promise
function getFileSystem() {
FMS.printDebug('Getting the file system');
var filesystem = $.Deferred();
window.requestFileSystem(
LocalFileSystem.PERSISTENT,
0,
filesystem.resolve,
filesystem.reject );
return filesystem.promise();
}
// Wrap the async Phonegap way of getting a directory in a promise
function getDirectory (rootDirectory, path, options) {
FMS.printDebug('Getting a directory: ' + path);
var directory = $.Deferred();
rootDirectory.getDirectory(path, options, directory.resolve, directory.reject);
return directory.promise();
}
// Wrap the async Phonegap way of getting a file in a promise
function getFile (directory, path, options) {
FMS.printDebug('Getting a file with path: ' + path + ' in directory: ' + directory.fullPath);
var file = $.Deferred();
directory.getFile(path, options, file.resolve, file.reject);
return file.promise();
}
function moveFile (src, dest, newName) {
FMS.printDebug( 'moveing file ' + src.fullPath + ' to ' + dest.fullPath );
var move = $.Deferred();
var destPath = dest.fullPath + '/' + src.name;
var srcPath = src.fullPath + '';
if ( srcPath === destPath ) {
FMS.printDebug('not moving because files are the same');
move.resolve( src );
} else {
FMS.printDebug('paths differ so moving');
src.moveTo( dest, newName, move.resolve, move.reject);
}
return move.promise();
}
function copyFile (src, dest, newName) {
FMS.printDebug( 'copying file ' + src.fullPath + ' to ' + dest.fullPath );
var copy = $.Deferred();
var destPath = dest.fullPath + '/' + src.name;
var srcPath = src.fullPath + '';
if ( srcPath === destPath ) {
FMS.printDebug('not copying because files are the same');
copy.resolve( src );
} else {
FMS.printDebug('paths differ so copying');
src.copyTo( dest, newName, copy.resolve, copy.reject);
}
return copy.promise();
}
function getFileFromURI(uri) {
FMS.printDebug( 'getting file from uri ' + uri );
var file = $.Deferred();
window.resolveLocalFileSystemURI( uri, file.resolve, file.reject);
return file.promise();
}
})(FMS, Backbone, _, $);
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