default_plugin.php

<?php
/*
 Plugin Name: New_Plugin
 Description: Empty Plugin to fill with your code
 Version: 0.0
 Author: David Naber <kontakt@dnaber.de>
 Author URI: http://dnaber.de
 */

# @charset utf-8

# @todo Replace New_Plugin with your class name
# @todo Create a directory ./i18n with .mo files, if needed
# @todo Un-comment actimation/deactivation hooks, if needed
# @todo Un-comment mce_external_languages filter, if needed

if ( ! function_exists( 'add_filter' ) )
	exit;

if ( ! class_exists( 'New_Plugin' ) ) {

	add_action( 'init', array( 'New_Plugin', 'init' ) );

	#register_aktivation_hook( plugin_basename( __FILE__ ), array( 'New_Plugin', 'activate' ) );
	#register_deactivation_hook( plugin_basename( __FILE__ ), array( 'New_Plugin', 'deactivate' ) );
	register_uninstall_hook( plugin_basename( __FILE__ ), array( 'New_Plugin', 'uninstall' ) );

	class New_Plugin {

		/**
		 * Textdomain
		 *
		 * @access public
		 * @const string
		 */
		const TEXTDOMAIN = 'New_Plugin';

		/**
		 * Version
		 *
		 * @access public
		 * @const string
		 */
		const VERSION = '0.0';

		/**
		 * Option Key
		 *
		 * @access public
		 * @const string
		 */
		const OPTION_KEY = 'New_Plugin_Options';

		/**
		 * $uri
		 *
		 * absolute uri to the plugin with trailing slash
		 *
		 * @access public
		 * @static
		 * @var string
		 */
		public static $uri = '';

		/**
		 * $dir
		 *
		 * filesystem path to the plugin with trailing slash
		 *
		 * @access public
		 * @static
		 * @var string
		 */
		public static $dir = '';

		/**
		 * $default_options
		 *
		 * Some settings to use by default
		 *
		 * @access protected
		 * @static
		 * @var array
		 */
		protected static $default_options = array(
			#'foo' => 'bar',
		);

		/**
		 *
		 * $options
		 *
		 * @access protected
		 * @var array
		 */
		protected $options = array();

		/**
		 * init
		 *
		 * @access public
		 * @static
		 * @return void
		 */
		public function init() {

			self :: $uri = plugin_dir_url( __FILE__ );
			self :: $dir = plugin_dir_path( __FILE__ );

			new self( TRUE );
		}

		/**
		 * constructor
		 *
		 * @access public
		 * @param bool $hook_in
		 * @return void
		 */
		public function __construct( $hook_in = FALSE ) {

			$this->load_options();
			$this->load_textdomain();

			if ( $hook_in ) {
				add_action( 'admin_menu', array( &$this, 'admin_menu' ) );
			}
		}

		/**
		 * admin menu
		 *
		 * @access public
		 * @return void
		 */
		public function admin_menu() {
			add_submenu_page(
				'options-general.php',
				__( 'New Plugin Settings', self :: TEXTDOMAIN ),
				__( 'New Plugin Settings', self :: TEXTDOMAIN ),
				'manage_options',
				'new_plugin',
				array( &$this, 'add_admin_submenu_page' )
			);

		}

		/**
		 * an admin submenu page
		 *
		 * @access public
		 * @return void
		 */
		public function add_admin_submenu_page () {
			if ( 'POST' === $_SERVER[ 'REQUEST_METHOD' ] ) {
				if ( get_magic_quotes_gpc() ) {
					$_POST = array_map( 'stripslashes_deep', $_POST );
				}

				# evaluation goes here

				# saving
				if ( $this->update_options() ) {
					?><div class="updated"><p> <?php _e( 'Settings saved', self :: TEXTDOMAIN );?></p></div><?php
				}
			}

			?>
			<div class="wrap">
				<h2><?php _e( 'New Plugin settings', self :: TEXTDOMAIN );?></h2>
				<div id="poststuff" class="metabox-holder has-right-sidebar">
					<div id="side-info-column" class="inner-sidebar">
						<div id="side-sortables" class="meta-box-sortables ui-sortable">
							<div class="postbox">
								<h3 class="handle"><?php _e( 'Aside', self :: TEXTDOMAIN );?></h3>
								<div class="inside">
								</div>
							</div>
						</div>
					</div>
					<div id="post-body">
						<div id="post-body-content">
							<div id="normal-sortables" class="meta-box-sortables ui-sortable">
								<div class="postbox inside">
									<h3><?php _e( 'New Plugin options', self :: TEXTDOMAIN );?></h3>
									<div class="inside">
										<form method="post" action="">
											<p>
											<input type="submit" class="button-primary" name="submit" value="<?php _e( 'Save settings', self :: TEXTDOMAIN );?>" />
											</p>
										</form>
									</div>
								</div>
							</div>
						</div>
					</div>
				</div>
			</div><?php
		}
		/**
		 * load_textdomain
		 *
		 * @access protected
		 * @return void
		 */
		protected function load_textdomain() {
			# load plugin textdomain
			load_plugin_textdomain( self :: TEXTDOMAIN, FALSE, basename( plugin_basename( __FILE__ ) ) . '/i18n' );
			# load tinyMCE localisation file
			#add_filter( 'mce_external_languages', array( &$this, 'mce_localisation' ) );
		}

		/**
		 * mce_localisation
		 *
		 * @access public
		 * @param array $mce_external_languages
		 * @return array
		 */
		public function mce_localisation( $mce_external_languages ) {

			if ( file_exists( self :: $dir . 'i18n/mce_langs.php' ) )
				$mce_external_languages[ 'inpsydeOembedVideoShortcode' ] = self :: $dir . 'i18n/mce-langs.php';
			return $mce_external_languages;
		}
		/**
		 * load_options
		 *
		 * @access protected
		 * @return void
		 */
		protected function load_options() {

			if ( ! get_option( self :: OPTION_KEY ) ) {
				if ( empty( self :: $default_options ) )
					return;
				$this->options = self :: $default_options;
				add_option( self :: OPTION_KEY, $this->options , '', 'yes' );
			}
			else {
				$this->options = get_option( self :: OPTION_KEY );
			}
		}

		/**
		 * update_options
		 *
		 * @access protected
		 * @return bool True, if option was changed
		 */
		public function update_options() {
			return update_option( self :: OPTION_KEY, $this->options );
		}

		/**
		 * activation
		 *
		 * @access public
		 * @static
		 * @return void
		 */
		public static function activate() {

		}

		/**
		 * deactivation
		 *
		 * @access public
		 * @static
		 * @return void
		 */
		public static function deactivate() {

		}

		/**
		 * uninstallation
		 *
		 * @access public
		 * @static
		 * @global $wpdb, $blog_id
		 * @return void
		 */
		public static function uninstall() {
			global $wpdb, $blog_id;
			if ( is_network_admin() ) {
				if ( isset ( $wpdb->blogs ) ) {
					$blogs = $wpdb->get_results(
						$wpdb->prepare(
							'SELECT blog_id ' .
							'FROM ' . $wpdb->blogs . ' ' .
							"WHERE blog_id <> '%s'",
							$blog_id
						)
					);
					foreach ( $blogs as $blog ) {
						delete_blog_option( $blog->blog_id, self :: OPTION_KEY );
					}
				}
			}
			delete_option( self :: OPTION_KEY );
		}
	}
}