cache.js

/**
 * Caching functions class
 * @class Cache
 */
var Moment = require("alloy/moment");

var directory;

exports.valid = function (_url) {
	var fileName = _url.replace(/[^\w\d]/g, "");
	var file = Ti.Filesystem.getFile(directory.resolve(), fileName);

	if (file.exists()) {
		return true;
	} else {
		return false;
	}
};

exports.read = function (_url) {
	var fileName = _url.replace(/[^\w\d]/g, "");
	var file = Ti.Filesystem.getFile(directory.resolve(), fileName);

	if (file.exists()) {
		var data = file.read();
	} else {
		return false;
	}

	return JSON.parse(data);
};

exports.write = function (_url, _data) {
	var fileName = _url.replace(/[^\w\d]/g, "");
	var file = Ti.Filesystem.getFile(directory.resolve(), fileName);

	if (file.write(JSON.stringify(_data)) === false) {
		Ti.API.error("Could not write to local cache");
	}

	file = null;
};

exports.clear = function () {
	if (directory.exists() && directory.isDirectory()) {
		directory.deleteDirectory(true);
	}
};

exports.stage = function () {
	var dir = Ti.Filesystem.getFile(Ti.Filesystem.applicationCacheDirectory, "httpCache");
	if (!dir.exists()) {
		dir.createDirectory();
	}

	directory = Ti.Filesystem.getFile(Ti.Filesystem.applicationCacheDirectory, "httpCache");
};