LightDMMock/mock/LightDMMock.js

/**
 * LightDMMock "class"
 *
 * @author Roel Walraven <mail@cytodev.io>
 *
 * A LightDM Mock that is tightly based on the source C code of
 * Antergos' lightdm-webkit2-greeter. Please note that the deprecation errors
 * are intrusive for a reason.
 *
 * Usage:
 *   Include the file in your theme that needs mocking
 *     <script type="text/javascript" src="mock/LightDMMock.js"></script>
 *   Create a new instance of LightDMMock
 *     if(!("lightdm" in window)) {
 *         var LightDMMock = LightDMMock || {};
 *         window.lightdm = new LightDMMock(autofill, timeout, autoGuest);
 *     }
 *
 * @param {boolean} autofill  [wether or not the arrays for users, languages,
 *                             layouts, and sessions need to be filled with mock
 *                             data. I advise to test both to make your theme
 *                             less prone to crashing.]
 * @param {number}  timeout   [Value to use for simulated autologin (this value
 *                             is in seconds).]
 * @param {boolean} autoGuest [Wether or not to simulate automatic guest login.
 *                             This will also enable a guest account
 *                             in lightdm.has_guest_account]
 */
"use strict";

function LightDMMock(autofill, timeout, autoGuest) {
    this.hostname            = null;
    this.users               = null;
    this.default_language    = null;
    this.language            = null;
    this.languages           = null;
    this.default_layout      = null;
    this.layouts             = null;
    this.layout              = null;
    this.sessions            = null;
    this.num_users           = 0;
    this.default_session     = null;
    this.timed_login_user    = null;
    this.timed_login_delay   = null;
    this.authentication_user = null;
    this.in_authentication   = false;
    this.is_authenticated    = false;
    this.can_suspend         = false;
    this.can_hibernate       = false;
    this.can_restart         = false;
    this.can_shutdown        = false;
    this.lock_hint           = false;
    this.has_guest_account   = false;
    this.hide_users          = false;
    this.select_user         = null;
    this.select_guest        = false;
    this.autologin_user      = null;
    this.autologin_guest     = false;
    this.autologin_timeout   = 0;

    if(typeof autofill === "boolean" && autofill) {
        this.users           = JSON.parse(atob("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"));
        this.languages       = JSON.parse(atob("W3sibmFtZSI6IkVuZ2xpc2giLCJjb2RlIjoiZW4iLCJ0ZXJyaXRvcnkiOm51bGx9XQ=="));
        this.layouts         = JSON.parse(atob("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
        this.sessions        = JSON.parse(atob("W3sibmFtZSI6IkxYREUiLCJrZXkiOiJMWERFIiwiY29tbWVudCI6IkxYREUgLSBMaWdodHdlaWdodCBYMTEgZGVza3RvcCBlbnZpcm9ubWVudCJ9LHsibmFtZSI6Ik9wZW5ib3giLCJrZXkiOiJvcGVuYm94IiwiY29tbWVudCI6IkxvZyBpbiB1c2luZyB0aGUgT3BlbmJveCB3aW5kb3cgbWFuYWdlciAod2l0aG91dCBhIHNlc3Npb24gbWFuYWdlcikifSx7Im5hbWUiOiJUV00iLCJrZXkiOiJ0d20iLCJjb21tZW50IjoiVGhlIFRhYiBXaW5kb3cgTWFuYWdlciJ9LHsibmFtZSI6IlRpbnl3bSIsImtleSI6InRpbnl3bSIsImNvbW1lbnQiOiJSaWRpY3Vsb3VzbHkgdGlueSB3aW5kb3cgbWFuYWdlciJ9XQ"));
        this.language        = this.languages[0].name;
        this.layout          = this.layouts[0].name;
        this.default_session = this.sessions[0].name;
        this.layout          = this.layouts[0].name;
        this.num_users       = this.users.length;

        if(typeof timeout === "number" && timeout > 0) {
            if(typeof autoGuest === "boolean" && autoGuest) {
                this.autologin_user  = null;
                this.autologin_guest = autoGuest;
            }

            this.autologin_user    = this.users[0].name;
            this.autologin_timeout = timeout * 1000;

            setTimeout(function() {
                if((typeof autoGuest === "boolean" && autoGuest) || this.autologin_user !== null)
                    window.autologin_timer_expired();
            }.bind(this), this.timed_login_delay);
        }

        for(var i = 0; i <= this.users; i++) {
            this.users[i].logged_in = Boolean(Math.floor(Math.random() * 2));
            this.users[i].session = this.sessions[Math.floor((Math.random() * this.sessions.length))].name;
        }
    }
}

/**
 * Deprecated method.
 */
LightDMMock.prototype.cancel_timed_login = function() {
    window.deprecationNotifier("method", "lightdm.cancel_timed_login()", "lightdm.cancel_autologin()");
};

/**
 * Cancels the authentication of the autologin user. The older function
 * lightdm.cancel_timed_login() has been deprecated.
 */
LightDMMock.prototype.cancel_autologin = function() {
    window.checkArguments(arguments, 0, []);

    this.autologin_user    = null;
    this.autologin_guest   = false;
    this.autologin_timeout = 0;
};

/**
 * Deprecated method.
 */
LightDMMock.prototype.start_authentication = function() {
    window.deprecationNotifier("method", "lightdm.start_authentication()", "lightdm.authenticate(username)");
};

/**
 * Specifies the username of the user we'd like to start authenticating as.
 * Note that if you call lightdm.authenticate with no argument, LightDM
 * (via PAM) will issue a show_prompt() call to ask for the username. The
 * older function lightdm.start_authentication() has been deprecated.
 *
 * @param  {String} username [username to authenticate]
 */
LightDMMock.prototype.authenticate = function(username) {
    window.checkArguments(arguments, 1, ["string"]);

    if(this.in_authentication) {
        window.show_message("Already authenticating " + this.authentication_user, "error");
        return;
    }

    var exists = false;

    for(var i = 0; i <= this.users.length; i++) {
        if(this.users.name === username)
            exists = true;
    }

    if(!exists) {
        window.show_message("Invalid username", "error");
        return;
    }

    this.authentication_user = username;
    this.in_authentication = true;

    window.show_prompt("Password:", "password");
};

/**
 * Authenticates as the guest user.
 */
LightDMMock.prototype.authenticate_as_guest = function() {
    window.checkArguments(arguments, 0, []);

    if(!this.has_guest_account)
        throw new IlligalUsageException("Guest accounts are turned off. Make sure you check the value of 'lightdm.has_guest_account' before calling this function.");

    if(this.in_authentication) {
        window.show_message("Already authenticating" + this.authentication_user, "error");
        return;
    }

    this.authentication_user = "guest";
    this.in_authentication = true;
};

/**
 * When LightDM has prompted for input, provide the response to LightDM. The
 * deprecated function was "provide_secret". This is still available for
 * backwards compatibility, but authors of greeters should move
 * to using lightdm.respond().
 *
 * @param {String} text [the response to the challange, usually a password]
 */
LightDMMock.prototype.respond = function(text) {
    window.checkArguments(arguments, 1, ["string"]);

    if(!this.in_authentication)
        throw new IlligalUsageException("LightDM is currently not in the authentication phase. Make sure to call 'lightdm.authenticate(username)' before calling this function.");

    if(text === "password") {
        this.is_authenticated = true;
        window.authentication_complete();
    } else {
        window.show_message("Invalid password", "error");
    }
};

/**
 * Deprecated method.
 */
LightDMMock.prototype.provide_secret = function() {
    window.deprecationNotifier("method", "lightdm.provide_secret(text)", "lightdm.respond(text)");
};

/**
 * Cancels the authentication of any user currently in the
 * process of authenticating.
 */
LightDMMock.prototype.cancel_authentication = function() {
    window.checkArguments(arguments, 0, []);

    this.authentication_user = null;
    this.in_authentication   = false;
};

/**
 * Suspends the system, if the greeter has the authority to do so.
 */
LightDMMock.prototype.suspend = function() {
    window.checkArguments(arguments, 0, []);

    if(!this.can_suspend)
        throw new IlligalUsageException("LightDM cannot suspend the system. Make sure you check the value of 'lightdm.can_suspend' before calling this function.");

    window.alert("System suspended.");
    document.location.reload(true);
};

/**
 * Hibernates the system, if the greeter has the authority to do so.
 */
LightDMMock.prototype.hibernate = function() {
    window.checkArguments(arguments, 0, []);

    if(!this.can_hibernate)
        throw new IlligalUsageException("LightDM cannot hibernate the system. Make sure you check the value of 'lightdm.can_hibernate' before calling this function.");

    window.alert("System hibernated.");
    document.location.reload(true);
};

/**
 * Shuts down the system, if the greeter has the authority to do so.
 */
LightDMMock.prototype.shutdown = function() {
    window.checkArguments(arguments, 0, []);

    if(!this.can_shutdown)
        throw new IlligalUsageException("LightDM cannot shut down the system. Make sure you check the value of 'lightdm.can_shutdown' before calling this function.");

    window.alert("System shut down.");
    document.location.reload(true);
};

/**
 * Restarts the system, if the greeter has the authority to do so.
 */
LightDMMock.prototype.restart = function() {
    window.checkArguments(arguments, 0, []);

    if(!this.can_restart)
        throw new IlligalUsageException("LightDM cannot restart the system. Make sure you check the value of 'lightdm.can_restart' before calling this function.");

    window.alert("System restarted.");
    document.location.reload(true);
};

/**
 * Will set the language for the current LightDM session.
 *
 * @param {String} lang [the language to change to]
 */
LightDMMock.prototype.set_language = function(lang) {
    window.checkArguments(arguments, 1, ["string"]);

    this.language = lang;
};

/**
 * Deprecated method.
 */
LightDMMock.prototype.login = function() {
    window.deprecationNotifier("method", "lightdm.login()", "lightdm.start_session_sync(session)");
};

/**
 * Once LightDM has successfully authenticated the user, start the user's
 * session by calling this function. "session" is the authenticated user's
 * session. If no session is passed, start the authenticated user with the
 * system default session. The older function lightdm.login(user, session)
 * has been deprecated.
 *
 * @param  {String} session [the session name to start]
 */
LightDMMock.prototype.start_session_sync = function(session) {
    window.checkArguments(arguments, 1, ["string"]);

    if(!this.in_authentication)
        throw new IlligalUsageException("LightDM is currently not in the authentication phase. Make sure to call 'lightdm.authenticate(username)' before calling this function.");

    if(!this.is_authenticated)
        throw new IlligalUsageException("LightDM has no authenticated users to log in. Make sure to call 'lightdm.respond()' before calling this function.");

    window.alert("LightDM has started a " + session + " session for " + this.authentication_user);
};

/**
 * Returns the value of a named hint provided by LightDM.
 *
 * @param  {String} hint_name [name of the hint to show]
 */
LightDMMock.prototype.get_hint = function(hint_name) {
    window.checkArguments(arguments, 1, ["string"]);

    // @fixme: I have no clue how to simulate this...
};


/******************************************************************************
 *                                 Throwables                                 *
*******************************************************************************/

/**
 * Throwable IlligalUsageException
 *
 * @param {string} message [description of illigal usage]
 */
function IlligalUsageException(message) {
    this.name = "IlligalUsageException";
    this.message = message;
    this.toString = function() {
        return "[" + this.name + "] " + this.message;
    };
}

/**
 * Throwable DeprecationException
 *
 * @param  {String} type        [method||property]
 * @param  {String} depricated  [deprecated method or property name]
 * @param  {String} alternative [alternative method or property to use]
 */
function DeprecationException(type, deprecated, alternative) {
    this.name = "DeprecationException";
    this.message = "The " + type + " '" + deprecated + "' is deprecated. Consider using '" + alternative + "' instead.";
    this.toString = function() {
        return "[" + this.name + "] " + this.message;
    };
}

/**
 * Throwable IncompatibleArgumentCountException
 *
 * @param  {Number} expected [expected length of arguments]
 * @param  {Number} received [found length of arguments]
 */
function IncompatibleArgumentCountException(expected, received) {
    this.name = "IncompatibleArgumentCountException";
    this.message = "Incorrect number of arguments in function call. Expected " + expected + ", found " + received;
    this.toString = function() {
        return "[" + this.name + "] " + this.message;
    };
}

/**
 * Throwable IncompatibleArgumentTypesException
 *
 * @param  {Number} type     [argument number (non-zero)]
 * @param  {String} expected [expected type]
 * @param  {String} received [found type]
 */
function IncompatibleArgumentTypesException(number, expected, received) {
    this.name = "IncompatibleArgumentTypesException";
    this.message = "Argument " + number + " is of a wrong type. Expected '" + expected + "', found '" + received + "'";
    this.toString = function() {
        return "[" + this.name + "] " + this.message;
    };
}


/******************************************************************************
 *                                   Helpers                                  *
*******************************************************************************/

/**
 * global helper deprecationNotifier
 *     throws ~balls~ errors at users who use deprecated methods and properties.
 *
 * @param  {String} type        [method||property]
 * @param  {String} depricated  [deprecated method or property name]
 * @param  {String} alternative [alternative method or property to use]
 *
 * @throws {DeprecationException}
 */
window.deprecationNotifier = function(type, deprecated, alternative) {
    throw new DeprecationException(type, deprecated, alternative);
};

/**
 * global helper checkArguments
 *     throws ~tables~ errors at users who call methods
 *     with erroneous arguments.
 *
 * @param  {Array}  args   [the arguments passed to the original method]
 * @param  {Number} length [the expected amount of arguments]
 * @param  {Arrray} types  [the expected types of the arguments]
 *
 * @throws {IncompatibleArgumentTypesException}
 */
window.checkArguments = function(args, length, types) {
    if(args.length -1 !== length)
        throw new IncompatibleArgumentCountException(length, args.length -1);

    for(var i = 1; i <= types.length; i++) {
        if(typeof args[i] !== types[i-1])
            throw new IncompatibleArgumentTypesException(i, types[i-1], typeof args[i]);
    }
};


/******************************************************************************
 *                             Object.watch  shim                             *
*******************************************************************************/

if(!Object.prototype.watch) {
    Object.prototype.watch = function (prop, handler) {
        var oldval = this[prop];
        var newval;
        var getter = function() {
            return newval;
        };
        var setter = function(val) {
            oldval = newval;
            newval = handler.call(this, prop, oldval, val);
            return newval;
        };

        if(delete this[prop]) {
            Object.defineProperty(this, prop, {
                get: getter,
                set: setter
            });
        }
    };
}

if(!Object.prototype.unwatch) {
    Object.prototype.unwatch = function (prop) {
        var val = this[prop];
        delete this[prop];
        this[prop] = val;
    };
}

LightDMMock.watch('default_language', function() {
    window.deprecationNotifier("property", "default_language", "lightdm.language");
});

LightDMMock.watch('default_layout', function() {
    window.deprecationNotifier("property", "default_layout", "lightdm.layout");
});

LightDMMock.watch('timed_login_user', function() {
    window.deprecationNotifier("property", "timed_login_user", "lightdm.autologin_user");
});

LightDMMock.watch('timed_login_delay', function() {
    window.deprecationNotifier("property", "timed_login_delay", "lightdm.autologin_timeout");
});