<?php

// Plugin compatability file

// to help with older versions of WordPress and WordPress MU

// some concepts taken from compatibility.php from the OpenID plugin at http://code.google.com/p/diso/ 

// this will also be the base include for AJAX routines

// so we need to check if WordPress is loaded, if not, load it

// we'll use ABSPATH, since that's defined when WordPress loads

// should be included in the init function of normal plugins

if ( !function_exists( 'compat_get_wp_content_dir' ) ) {

	function compat_get_wp_content_dir() {

		if ( defined( 'WP_CONTENT_DIR' ) ) {

			return WP_CONTENT_DIR;

		} else {

			return get_option( 'siteurl' ) . '/wp-content';	

		}

	}

}

if ( !function_exists( 'compat_get_wp_content_url' ) ) {

	function compat_get_wp_content_url() {

		if ( defined( 'WP_CONTENT_URL') ) {

			return WP_CONTENT_URL;

		} else {

			return ABSPATH . 'wp-content';

		}

	}

}

if ( !function_exists( 'compat_is_wordpress_mu' ) ) {

	function compat_is_wordpress_mu() {	

		return file_exists( compat_get_wp_content_dir() . '/mu-plugins' );

	}

}

if ( !function_exists( 'compat_get_base_plugin_dir' ) ) {

	function compat_get_base_plugin_dir() {

		if ( compat_is_wordpress_mu() && strpos( dirname( __FILE__ ), 'mu-plugins') !== false ) {

			return compat_get_wp_content_dir() . '/mu-plugins';

		} else {	

			return compat_get_wp_content_dir() . '/plugins';

		}

	}

}

if ( !function_exists( 'compat_get_base_plugin_url' ) ) {

	function compat_get_base_plugin_url() {

		if ( compat_is_wordpress_mu() && strpos( dirname( __FILE__ ), 'mu-plugins')  !== false ) {

			return compat_get_wp_content_url() . '/mu-plugins';

		} else {

			return compat_get_wp_content_url() . '/plugins';

		}

	}

}

if ( !function_exists( 'compat_get_plugin_dir') ) {

	function compat_get_plugin_dir( $plugin_name ) {

		return compat_get_base_plugin_dir() . '/' . $plugin_name;

	}

}

if ( !function_exists( 'compat_get_plugin_url' ) ) {

	function compat_get_plugin_url( $plugin_name ) {

		return compat_get_base_plugin_url() . '/' . $plugin_name;

	}	

}

if ( !function_exists( 'compat_get_upload_dir' ) ) {

	function compat_get_upload_dir() {

		if ( compat_is_wordpress_mu() ) {

			global $blog_id;

			return compat_get_wp_content_dir() . '/blogs.dir/' . $blog_id . '/uploads';

		} else {	

			$upload_info = wp_upload_dir();		

			return $upload_info['basedir'];

		}		

	}

}

if ( !function_exists( 'compat_get_upload_url' ) ) {

	function compat_get_upload_url() {

		if ( compat_is_wordpress_mu() ) {

			global $blog_id;

			return compat_get_wp_content_url() . '/blogs.dir/' . $blog_id . '/uploads';

		} else {	

			$upload_info = wp_upload_dir();		

			return $upload_info['baseurl'];

		}			

	}	

}

?>