/*
Plugin Name: XC1 Maintenance
Plugin URI: http://www.xc1.se
Description: Puts the site into maintenance mode by sending a '503 Service Unavailable' status to all unauthenticated clients.
Author: Anders Hassis (Original idea by Zorex (http://blog.zorex.info/?page_id=144) and Robert Wetzlmayr (http://talkpress.de/blip/wet-maintenance-wordpress-plugin)
Version: 1.0
Author URI: http://xc1.se
License: GPL 2.0, @see http://www.gnu.org/licenses/gpl-2.0.html
*/
 
if(preg_match('#' . basename(__FILE__) . '#', $_SERVER['PHP_SELF'])) { 
	die('You are not allowed to call this page directly.'); 
}
 
// Buckle up!
$maintenance = new XC1_Maintenance();
 
class XC1_Maintenance {
 
	public $version = '1.0';
	public $err = false;
	public $msg = '';
	public $allSettings = array();
 
	public function XC1_Maintenance() {
		$this->allSettings = get_option('OfflineModeSettings');
 
		# Display the splash if enabled
		add_action('send_headers', array(&$this, 'activateMaintenancePage'));
 
		# Admin part below
		$data = array(	'OfflineMode_type' => '',
						'OfflineMode_enable' => '',
						'OfflineMode_startTime' => 0); 
 
		add_option('OfflineModeSettings',$data,'OfflineMode Settings');
		add_action('admin_menu', array(&$this, 'addSettingsPage') );
		add_action('admin_notices', array(&$this, 'adminNoticeMsg') );
	}
 
	# ----------------------------------------------------------------
	# Show the settings link for this plugin
	# ----------------------------------------------------------------
	public function addSettingsPage() {
		if (function_exists('add_options_page')) {
			add_options_page('XC1 Maintenance', 'XC1 Maintenance', 8, basename(__FILE__), array(&$this, 'optionPage') ) ;
		}
	}
 
	public function maintenance_header($status_header, $header, $text, $protocol) {
		return "$protocol 503 Service Unavailable";
	}
 
	public function maintenance_feed() {
		die('<?xml version="1.0" encoding="UTF-8"?><status>Service unavailable</status>');
	}
 
	public function add_feed_actions() {
		$feeds = array ('rdf', 'rss', 'rss2', 'atom');
		foreach ($feeds as $feed) {
			add_action('do_feed_'.$feed, array(&$this, 'wet_maintenance_feed'), 1, 1);
		} 
	}
 
	# ----------------------------------------------------------------
	# Show the options of the settings
	# ----------------------------------------------------------------
 
	public function optionPage() {		
 
		# User is authorized
		if( $this->isAuthorized() ) {
 
			if (isset($_POST['OfflineMode_submit'])) {
 
				$data = array( 'OfflineMode_enable' => ((int) $_POST['OfflineMode_enable']), 'OfflineMode_startTime' => time() );
 
				update_option('OfflineModeSettings',$data);
 
				if (isset($_POST['OfflineMode_redirect']))
					$url = $_POST['OfflineMode_redirect'];
				else
					$url = $_SERVER['REQUEST_URI'];
 
				echo "<div id=\"message\" class=\"updated fade\"><p>Inställningar uppdaterade.</p> <a href=\"".$url."\">Gå tillbaka</a>.</div>";
				die();
			}			
 
			# Fill the settings to the form
			if( $this->allSettings['OfflineMode_enable'] ) {
				$enabled = ' checked="checked"';
			}
 
			# Got msg to display?
			$this->msgBox();
 
			# ---- Start HTML for settings page ----
		?>
<div class="wrap">
	<h2>XC1 Maintenance</h2>
 
	<form action="<?php echo $_SERVER['REQUEST_URI'];?>" method="post">
 
		<table class="form-table">
			<tr valign="top">
				<th scope="row">Aktivera XC1 Maintenance</th>
				<td>
					<input type="checkbox" id="OfflineMode_enable" name="OfflineMode_enable" value="1"<?php echo $enabled; ?> />
					<label for="OfflineMode_enable">Stänger av webbplatsen och visar 503.php i ditt tema.</label>
					<input type="hidden" name="OfflineMode_redirect" value="<?php echo $_SERVER['REQUEST_URI'];?>" />
				</td>
			</tr>
		</table>
 
		<p class="submit">
			<input type="submit" name="OfflineMode_submit" value="Uppdatera" class="button" />
		</p>
 
	</form>
</div><?php
		}
	}
 
 
	# ----------------------------------------------------------------
	# Is user authorized to perform this action?
	# ----------------------------------------------------------------
	public function isAuthorized() {
		return current_user_can('activate_plugins');
 
	}
 
	# ----------------------------------------------------------------
	# Display the msg box if we got msg to display
	# ----------------------------------------------------------------
	public function msgBox() {		
		if( $this->msg != NULL ) {
			# ---- Start of HTML for msg box ----
		?>
			<div id="message" class="updated fade"><p><?php echo $this->msg; ?></p></div>
		<?php
		}
	}
 
 
	# ----------------------------------------------------------------
	# Display the notice box when OfflineMode is enabled
	# ----------------------------------------------------------------
	public function adminNoticeMsg() {		
		# User is authorized
		if( $this->isAuthorized() && $this->allSettings['OfflineMode_enable'] ) {
			# ---- Admin notice msg ----	
		?>
			<div class="error">
				<p>
				<strong>XC1 Maintenance</strong> är aktivt. Glöm inte att <a href="admin.php?page=<?php echo basename(__FILE__); ?>">inaktivera</a> det så fort du är klar.
				</p>
			</div>
		<?php
		}
	}
 
	public function activateMaintenancePage() {		
		# Run the splash page lorr
		if ( $this->allSettings['OfflineMode_enable'] && !$this->isAuthorized() ) {
			add_filter('status_header', array(&$this, 'maintenance_header', 10, 4) );
			$this->add_feed_actions();
 
			if (file_exists(get_stylesheet_directory() . '/503.php'))
				$file = get_stylesheet_directory() . '/503.php';
			else 
				$file = get_template_directory().'/503.php';
 
			include_once( $file );
			exit();
		}
	}
 
}