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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const {Cc,Ci,Cr} = require("chrome");
const byteStreams = require("./byte-streams");
const textStreams = require("./text-streams");
// Flags passed when opening a file. See nsprpub/pr/include/prio.h.
const OPEN_FLAGS = {
RDONLY: parseInt("0x01"),
WRONLY: parseInt("0x02"),
CREATE_FILE: parseInt("0x08"),
APPEND: parseInt("0x10"),
TRUNCATE: parseInt("0x20"),
EXCL: parseInt("0x80")
};
var dirsvc = Cc["@mozilla.org/file/directory_service;1"]
.getService(Ci.nsIProperties);
function MozFile(path) {
var file = Cc['@mozilla.org/file/local;1']
.createInstance(Ci.nsILocalFile);
file.initWithPath(path);
return file;
}
function ensureReadable(file) {
if (!file.isReadable())
throw new Error("path is not readable: " + file.path);
}
function ensureDir(file) {
ensureExists(file);
if (!file.isDirectory())
throw new Error("path is not a directory: " + file.path);
}
function ensureFile(file) {
ensureExists(file);
if (!file.isFile())
throw new Error("path is not a file: " + file.path);
}
function ensureExists(file) {
if (!file.exists())
throw friendlyError(Cr.NS_ERROR_FILE_NOT_FOUND, file.path);
}
function friendlyError(errOrResult, filename) {
var isResult = typeof(errOrResult) === "number";
var result = isResult ? errOrResult : errOrResult.result;
switch (result) {
case Cr.NS_ERROR_FILE_NOT_FOUND:
return new Error("path does not exist: " + filename);
}
return isResult ? new Error("XPCOM error code: " + errOrResult) : errOrResult;
}
exports.exists = function exists(filename) {
return MozFile(filename).exists();
};
exports.isFile = function isFile(filename) {
return MozFile(filename).isFile();
};
exports.read = function read(filename, mode) {
if (typeof(mode) !== "string")
mode = "";
// Ensure mode is read-only.
mode = /b/.test(mode) ? "b" : "";
var stream = exports.open(filename, mode);
try {
var str = stream.read();
}
finally {
stream.close();
}
return str;
};
exports.join = function join(base) {
if (arguments.length < 2)
throw new Error("need at least 2 args");
base = MozFile(base);
for (var i = 1; i < arguments.length; i++)
base.append(arguments[i]);
return base.path;
};
exports.dirname = function dirname(path) {
var parent = MozFile(path).parent;
return parent ? parent.path : "";
};
exports.basename = function basename(path) {
var leafName = MozFile(path).leafName;
// On Windows, leafName when the path is a volume letter and colon ("c:") is
// the path itself. But such a path has no basename, so we want the empty
// string.
return leafName == path ? "" : leafName;
};
exports.list = function list(path) {
var file = MozFile(path);
ensureDir(file);
ensureReadable(file);
var entries = file.directoryEntries;
var entryNames = [];
while(entries.hasMoreElements()) {
var entry = entries.getNext();
entry.QueryInterface(Ci.nsIFile);
entryNames.push(entry.leafName);
}
return entryNames;
};
exports.open = function open(filename, mode) {
var file = MozFile(filename);
if (typeof(mode) !== "string")
mode = "";
// File opened for write only.
if (/w/.test(mode)) {
if (file.exists())
ensureFile(file);
var stream = Cc['@mozilla.org/network/file-output-stream;1'].
createInstance(Ci.nsIFileOutputStream);
var openFlags = OPEN_FLAGS.WRONLY |
OPEN_FLAGS.CREATE_FILE |
OPEN_FLAGS.TRUNCATE;
var permFlags = parseInt("0644"); // u+rw go+r
try {
stream.init(file, openFlags, permFlags, 0);
}
catch (err) {
throw friendlyError(err, filename);
}
return /b/.test(mode) ?
new byteStreams.ByteWriter(stream) :
new textStreams.TextWriter(stream);
}
// File opened for read only, the default.
ensureFile(file);
stream = Cc['@mozilla.org/network/file-input-stream;1'].
createInstance(Ci.nsIFileInputStream);
try {
stream.init(file, OPEN_FLAGS.RDONLY, 0, 0);
}
catch (err) {
throw friendlyError(err, filename);
}
return /b/.test(mode) ?
new byteStreams.ByteReader(stream) :
new textStreams.TextReader(stream);
};
exports.remove = function remove(path) {
var file = MozFile(path);
ensureFile(file);
file.remove(false);
};
exports.mkpath = function mkpath(path) {
var file = MozFile(path);
if (!file.exists())
file.create(Ci.nsIFile.DIRECTORY_TYPE, parseInt("0755")); // u+rwx go+rx
else if (!file.isDirectory())
throw new Error("The path already exists and is not a directory: " + path);
};
exports.rmdir = function rmdir(path) {
var file = MozFile(path);
ensureDir(file);
try {
file.remove(false);
}
catch (err) {
// Bug 566950 explains why we're not catching a specific exception here.
throw new Error("The directory is not empty: " + path);
}
};
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