1 files changed, 173 insertions, 0 deletions
diff --git a/www/js/files.js b/www/js/files.js
new file mode 100644
index 0000000..eea38c3
--- /dev/null
+++ b/www/js/files.js
@@ -0,0 +1,173 @@
+/**
+ * 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, _, $);