.
 */
define('INSTALLDIR', dirname(__FILE__));
function main()
{
    if (!checkPrereqs())
    {
        return;
    }
    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        handlePost();
    } else {
        showForm();
    }
}
function checkPrereqs()
{
    if (file_exists(INSTALLDIR.'/config.php')) {
         ?>
Config file "config.php" already exists.
         Require PHP version 5 or greater.
Cannot load required extension "".
Cannot write config file to "".
	       On your server, try this command:
	       chmod a+w 
         Cannot write avatar directory "/avatar/".
	       On your server, try this command:
	       chmod a+w /avatar/
         
	     return false;
	}
	return true;
}
function checkExtension($name)
{
    if (!extension_loaded($name)) {
        if (!dl($name.'.so')) {
            return false;
        }
    }
    return true;
}
function showForm()
{
?>
Enter your database connection information below to initialize the database.
}
function updateStatus($status, $error=false)
{
?>
	
    print $status;
?>
	
}
function handlePost()
{
?>
	
    $host = $_POST['host'];
    $database = $_POST['database'];
    $username = $_POST['username'];
    $password = $_POST['password'];
    $sitename = $_POST['sitename'];
    if (empty($host)) {
        updateStatus("No hostname specified.", true);
        showForm();
        return;
    }
    if (empty($database)) {
        updateStatus("No database specified.", true);
        showForm();
        return;
    }
    if (empty($username)) {
        updateStatus("No username specified.", true);
        showForm();
        return;
    }
    if (empty($password)) {
        updateStatus("No password specified.", true);
        showForm();
        return;
    }
    if (empty($sitename)) {
        updateStatus("No sitename specified.", true);
        showForm();
        return;
    }
    updateStatus("Starting installation...");
    updateStatus("Checking database...");
    $conn = mysql_connect($host, $username, $password);
    if (!$conn) {
        updateStatus("Can't connect to server '$host' as '$username'.", true);
        showForm();
        return;
    }
    updateStatus("Changing to database...");
    $res = mysql_select_db($database, $conn);
    if (!$res) {
        updateStatus("Can't change to database.", true);
        showForm();
        return;
    }
    updateStatus("Running database script...");
    $res = runDbScript(INSTALLDIR.'/db/laconica.sql', $conn);
    if ($res === false) {
        updateStatus("Can't run database script.", true);
        showForm();
        return;
    }
    foreach (array('sms_carrier' => 'SMS carrier',
                   'notice_source' => 'notice source',
                   'foreign_services' => 'foreign service')
             as $scr => $name) {
        updateStatus(sprintf("Adding %s data to database...", $name));
        $res = runDbScript(INSTALLDIR.'/db/'.$scr.'.sql', $conn);
        if ($res === false) {
            updateStatus(sprintf("Can't run %d script.", $name), true);
            showForm();
            return;
        }
    }
    updateStatus("Writing config file...");
    $sqlUrl = "mysqli://$username:$password@$host/$database";
    $res = writeConf($sitename, $sqlUrl);
    if (!$res) {
        updateStatus("Can't write config file.", true);
        showForm();
        return;
    }
    updateStatus("Done!");
?>
	
}
function writeConf($sitename, $sqlUrl)
{
    $res = file_put_contents(INSTALLDIR.'/config.php',
                             "
	Install Laconica