<?

/*
 *  Account Login / Logout Handler for AppDB
 *
 */

include("path.php");
include(BASE."include/"."incl.php");

//set http header to not cache
header("Pragma: no-cache");
header("Cache-control: no-cache");

//check command and process
if(isset($_POST['cmd']))
 do_account($_POST['cmd']);
else
 do_account($_GET['cmd']);

//process according to $cmd from URL
function do_account($cmd = null)
{
	if (! $cmd) return 0;
	switch($cmd)
	{
    case "new":
        apidb_header("New Account");
        include(BASE."include/"."form_new.php");
        apidb_footer();
        exit;

    case "do_new":
        cmd_do_new();
        exit;

    case "login":
        apidb_header("Login");
        include(BASE."include/"."form_login.php");
        apidb_footer();
        exit;

    case "do_login":
        cmd_do_login();
        exit;

    case "send_passwd":
        cmd_send_passwd();
        exit;

    case "logout":
        apidb_session_destroy();
        addmsg("You are successfully logged out.", "green");
        redirect(apidb_fullurl("index.php"));
        exit;
	}
	//not valid command, display error page
	errorpage("Internal Error","This module was called with incorrect parameters");
	exit;
}

//retry
function retry($cmd, $msg)
{
    addmsg($msg, "red");
    do_account($cmd);
}

//create new account
function cmd_do_new()
{
    
    if(ereg("^.+@.+\\..+$", $_POST['ext_username']))
	{
	    $_POST['ext_username'] = "";
	    retry("new", "Invalid Username, must not contain special characters");
	    return;
	}
    if(strlen($_POST['ext_username']) < 3)
	{
	    $_POST['ext_username'] = "";
	    retry("new", "Username must be at least 3 characters");
	    return;
	}
    if(strlen($_POST['ext_password']) < 5)
	{
	    retry("new", "Password must be at least 5 characters");
	    return;
	}
    if($_POST['ext_password'] != $_POST['ext_password2'])
	{
	    retry("new", "Passwords don't match");
	    return;
	}
    if(!isset($_POST['ext_realname']))
	{
	    retry("new", "You don't have a Real name?");
	    return;
	}
    if(!ereg("^.+@.+\\..+$", $_POST['ext_email']))
	{
	    $_POST['ext_email'] = "";
	    retry("new", "Invalid email address");
	    return;
	}

    $user = new User();

    if($user->exists($_POST['ext_username']))
	{
	    $_POST['ext_username'] = "";
	    retry("new", "That username is already in use");
	    return;
	}

    $result = $user->create($_POST['ext_username'], $_POST['ext_password'], $_POST['ext_realname'], $_POST['ext_email']);

    if($result == null)
	{
	    $user->login($_POST['ext_username'], $_POST['ext_password']);
	    addmsg("Account created! (".$_POST['ext_username'].")", "green");
	    redirect(apidb_fullurl());
	}
    else
        retry("new", "Failed to create account: $result");
}

//email lost password
function cmd_send_passwd()
{
    $user = new User();
    
    $userid = $user->lookup_userid($_POST['ext_username']);
    $passwd = generate_passwd();
    
    if ($userid)
    {	
        if ($user->update($userid, $passwd))
        {
            $msg =  "Application DB Lost Password\n";
            $msg .= "----------------------------\n";
            $msg .= "We have received a request that you lost your password.\n";
            $msg .= "We will create a new password for you. You can then change\n";
            $msg .= "your password at the Preferences screen.\n\n";
            $msg .= "Your new password is: ".$passwd."\n\n";
            
            if (mail($user->lookup_email($userid), '[AppDB] Lost Password', $msg))
            {
                addmsg("Your new password has been emailed to you.", "green");
            }
            else
            {
                addmsg("Your password has changed, but we could not email it to you. Contact Support!", "red");
            }
        }
        else
        {
            addmsg("Internal Error, we could not update your password.", "red");
        }
    }
    else
    {
        addmsg("Sorry, that username (".$_POST['ext_username'].") does not exist.", "red");
    }
    
    redirect(apidb_fullurl("account.php?cmd=login"));
}

//on login handler
function cmd_do_login()
{
    $user = new User();
    $result = $user->login($_POST['ext_username'], $_POST['ext_password']);

    if($result == null)
	{
	    $_SESSION['current'] = $user;
	    addmsg("You are successfully logged in as '$user->username'.", "green");
	    redirect(apidb_fullurl("index.php"));    	    
	}
    else
	{
	    retry("login","Login failed ($result)");
	    $_SESSION['current'] = "";
	}
}

?>