1: <?php
  2: /*
  3:  * Plugin Name: Sidecar for WordPress
  4:  * Plugin URI: https://github.com/newclarity/sidecar
  5:  * Description:
  6:  * Version: 0.5.1
  7:  * Author: NewClarity, MikeSchinkel
  8:  * Author URI: https://newclarity.net
  9:  * Text Domain: sidecar
 10:  * License: GPLv2
 11:  *
 12:  *  Copyright 2012
 13:  *
 14:  *  This program is free software; you can redistribute it and/or modify
 15:  *  it under the terms of the GNU General Public License, version 2, as
 16:  *  published by the Free Software Foundation.
 17:  *
 18:  *  This program is distributed in the hope that it will be useful,
 19:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 20:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 21:  *  GNU General Public License for more details.
 22:  *
 23:  *  You should have received a copy of the GNU General Public License
 24:  *  along with this program; if not, write to the Free Software
 25:  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 26:  */
 27: define( 'SIDECAR_FILE', __FILE__ );
 28: define( 'SIDECAR_DIR', dirname( __FILE__ ) );
 29: define( 'SIDECAR_PATH', plugin_dir_path( __FILE__ ) );
 30: 
 31: define( 'SIDECAR_VER', '0.5.1' );
 32: define( 'SIDECAR_MIN_PHP', '5.2.4' );
 33: define( 'SIDECAR_MIN_WP', '3.2' );
 34: 
 35: /**
 36:  *
 37:  */
 38: final class Sidecar {
 39:   /**
 40:    * @var string
 41:    */
 42:   private static $_installed_dir = false;
 43: 
 44:   /**
 45:    * @var string
 46:    */
 47:   private static $_this_url = false;
 48: 
 49:   /**
 50:    * @var string
 51:    */
 52:   private static $_this_domain = false;
 53: 
 54:   /**
 55:    *
 56:    */
 57:   static function on_load() {
 58:     spl_autoload_register( array( __CLASS__, 'autoloader' ) );
 59:   }
 60: 
 61:   /**
 62:    *
 63:    */
 64:   static function autoloader( $class_name ) {
 65:     $suffix = preg_replace( '#^Sidecar_(.*)$#', '$1', $class_name );
 66:     $suffix = str_replace( '_', '-', strtolower( $suffix ) );
 67:     $filename = dirname( __FILE__ ) . "/classes/class-{$suffix}.php";
 68:     if ( is_file( $filename ) ) {
 69:       require( $filename );
 70:     }
 71:   }
 72: 
 73:   /**
 74:    * @param string $message
 75:    * @param array $args
 76:    */
 77:   static function show_error( $message, $args ) {
 78:     $args = func_get_args();
 79:     echo '<div class="error"><p><strong>ERROR</strong>[Sidecar]: ' . call_user_func_array( 'sprintf', $args ) . '</p></div>';
 80:   }
 81: 
 82:   /**
 83:    * Tests an array element for value, first checking for isset().
 84:    *
 85:    * @param array $array
 86:    * @param string $element
 87:    * @param mixed $value
 88:    * @param bool $exactly
 89:    * @return bool
 90:    */
 91:   static function element_is( $array, $element, $value = true, $exactly = false ) {
 92:     return isset( $array[$element] ) && ( $exactly ? $value === $array[$element] : $value == $array[$element] );
 93:   }
 94: 
 95:   /**
 96:      * Returns the domain for this site.
 97:    *
 98:      * @return string
 99:      */
100:     static function this_domain() {
101:       if ( ! self::$_this_domain ) {
102:         $parts = explode( '/', site_url() );
103:       self::$_this_domain = $parts[2];
104:      }
105:      return self::$_this_domain;
106:   }
107: 
108:   /**
109:      * Returns the directory in which WordPress is installed, or '/' if root.
110:    *
111:    * Preceded with a '/' but no trailing '/'
112:      *
113:      * @return string
114:      */
115:     static function installed_dir() {
116:       if ( ! self::$_installed_dir ) {
117:         $site_url = site_url();
118:       if ( 2 == substr_count( $site_url, '/' ) ) {
119:         self::$_installed_dir = '/';
120:       } else {
121:         $regex = '^https?://' . preg_quote( self::this_domain() ) . '(/.*)/?$';
122:         self::$_installed_dir = preg_replace( "#{$regex}#", '$1', site_url() );
123:       }
124:     }
125:     return self::$_installed_dir;
126:   }
127: 
128:   /**
129:    * Returns the current URL.
130:    *
131:    * @return bool
132:    */
133:   static function this_url() {
134:       if ( ! self::$_this_url ) {
135:        $installed_dir = self::installed_dir();
136:        $requested_path = substr( $_SERVER['REQUEST_URI'], strlen( $installed_dir ) );
137:        self::$_this_url = site_url( $requested_path );
138:     }
139:     return self::$_this_url;
140:     }
141: }
142: Sidecar::on_load();
143: