// Copyright (c) 2008-2009 by Kris Maglione <maglione.k at Gmail>
//
// This work is licensed for reuse under an MIT license. Details are
// given in the LICENSE.txt file included with this file.

/** @scope modules */

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const Cu = Components.utils;

/**
 * Cached XPCOM services and classes.
 *
 * @constructor
 */
function Services()
{
    const classes = {};
    const services = {};

    function create(classes, ifaces, meth)
    {
        try
        {
            let res = Cc[classes][meth || "getService"]();
            if (!ifaces)
                return res.wrappedJSObject;
            ifaces = Array.concat(ifaces);
            ifaces.forEach(function (iface) res.QueryInterface(iface));
            return res;
        }
        catch (e)
        {
            // liberator.log() is not defined at this time, so just dump any error
            dump("Service creation failed for '" + classes + "': " + e + "\n");
        }
    }

    const self = {
        /* @property {Object} A map of all cached services. */
        get services() services,

        /* @property {Object} A map of all cached classes. */
        get classes() classes,

        /**
         * Adds a new XPCOM service to the cache.
         *
         * @param {string} name The service's cache key.
         * @param {string} class The class's contract ID.
         * @param {nsISupports|nsISupports[]} ifaces The interface or array of
         *     interfaces implemented by this service.
         * @param {string} meth The name of the function used to instanciate
         *     the service.
         */
        add: function (name, class, ifaces, meth)
        {
            return services[name] = create(class, ifaces, meth);
        },

        /**
         * Adds a new XPCOM class to the cache.
         *
         * @param {string} name The class's cache key.
         * @param {string} class The class's contract ID.
         * @param {nsISupports|nsISupports[]} ifaces The interface or array of
         *     interfaces implemented by this class.
         */
        addClass: function (name, class, ifaces)
        {
            return classes[name] = function () create(class, ifaces, "createInstance");
        },

        /**
         * Returns the cached service with the specified name.
         *
         * @param {string} name The service's cache key.
         */
        get: function (name) services[name],

        /**
         * Returns a new instance of the cached class with the specified name.
         *
         * @param {string} name The class's cache key.
         */
        create: function (name) classes[name]()
    };

    self.add("appStartup",          "@mozilla.org/toolkit/app-startup;1",               Ci.nsIAppStartup);
    self.add("autoCompleteSearch",  "@mozilla.org/autocomplete/search;1?name=history",  Ci.nsIAutoCompleteSearch);
    self.add("bookmarks",           "@mozilla.org/browser/nav-bookmarks-service;1",     Ci.nsINavBookmarksService);
    self.add("browserSearch",       "@mozilla.org/browser/search-service;1",            Ci.nsIBrowserSearchService);
    self.add("cache",               "@mozilla.org/network/cache-service;1",             Ci.nsICacheService);
    self.add("console",             "@mozilla.org/consoleservice;1",                    Ci.nsIConsoleService);
    self.add("directory",           "@mozilla.org/file/directory_service;1",            Ci.nsIProperties);
    self.add("environment",         "@mozilla.org/process/environment;1",               Ci.nsIEnvironment);
    self.add("extensionManager",    "@mozilla.org/extensions/manager;1",                Ci.nsIExtensionManager);
    self.add("favicon",             "@mozilla.org/browser/favicon-service;1",           Ci.nsIFaviconService);
    self.add("json",                "@mozilla.org/dom/json;1",                          Ci.nsIJSON, "createInstance");
    self.add("liberator:",          "@mozilla.org/network/protocol;1?name=liberator");
    self.add("livemark",            "@mozilla.org/browser/livemark-service;2",          Ci.nsILivemarkService);
    self.add("observer",            "@mozilla.org/observer-service;1",                  Ci.nsIObserverService);
    self.add("io",                  "@mozilla.org/network/io-service;1",                Ci.nsIIOService);
    self.add("pref",                "@mozilla.org/preferences-service;1",               [Ci.nsIPrefService, Ci.nsIPrefBranch, Ci.nsIPrefBranch2]);
    self.add("profile",             "@mozilla.org/toolkit/profile-service;1",           Ci.nsIToolkitProfileService);
    self.add("rdf",                 "@mozilla.org/rdf/rdf-service;1",                   Ci.nsIRDFService);
    self.add("sessionStore",        "@mozilla.org/browser/sessionstore;1",              Ci.nsISessionStore);
    self.add("subscriptLoader",     "@mozilla.org/moz/jssubscript-loader;1",            Ci.mozIJSSubScriptLoader);
    self.add("threadManager",       "@mozilla.org/thread-manager;1",                    Ci.nsIThreadManager);
    self.add("windowMediator",      "@mozilla.org/appshell/window-mediator;1",          Ci.nsIWindowMediator);
    self.add("windowWatcher",       "@mozilla.org/embedcomp/window-watcher;1",          Ci.nsIWindowWatcher);
    self.add("xulAppInfo",          "@mozilla.org/xre/app-info;1",                      Ci.nsIXULAppInfo);

    self.addClass("file",       "@mozilla.org/file/local;1",            Ci.nsILocalFile);
    self.addClass("find",       "@mozilla.org/embedcomp/rangefind;1",   Ci.nsIFind);
    self.addClass("process",    "@mozilla.org/process/util;1",          Ci.nsIProcess);

    return self;
}

var services = Services();

// vim: set fdm=marker sw=4 ts=4 et: