diff options
Diffstat (limited to 'plugins/jetpack/modules/google-analytics/wp-google-analytics.php')
| -rw-r--r-- | plugins/jetpack/modules/google-analytics/wp-google-analytics.php | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/plugins/jetpack/modules/google-analytics/wp-google-analytics.php b/plugins/jetpack/modules/google-analytics/wp-google-analytics.php new file mode 100644 index 00000000..56779f77 --- /dev/null +++ b/plugins/jetpack/modules/google-analytics/wp-google-analytics.php @@ -0,0 +1,169 @@ +<?php +/* + Copyright 2006 Aaron D. Campbell (email : wp_plugins@xavisys.com) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +/** + * Jetpack_Google_Analytics is the class that handles ALL of the plugin functionality. + * It helps us avoid name collisions + * http://codex.wordpress.org/Writing_a_Plugin#Avoiding_Function_Name_Collisions + */ +class Jetpack_Google_Analytics { + + /** + * @var Jetpack_Google_Analytics - Static property to hold our singleton instance + */ + static $instance = false; + + /** + * This is our constructor, which is private to force the use of get_instance() + * + * @return void + */ + private function __construct() { + add_action( 'wp_footer', array( $this, 'insert_code' ) ); + } + + /** + * Function to instantiate our class and make it a singleton + */ + public static function get_instance() { + if ( ! self::$instance ) { + self::$instance = new self; + } + + return self::$instance; + } + + /** + * Used to generate a tracking URL + * + * @param array $track - Must have ['data'] and ['code']. + * @return string - Tracking URL + */ + private function _get_url( $track ) { + $site_url = ( is_ssl() ? 'https://':'http://' ) . sanitize_text_field( wp_unslash( $_SERVER['HTTP_HOST'] ) ); // Input var okay. + foreach ( $track as $k => $value ) { + if ( strpos( strtolower( $value ), strtolower( $site_url ) ) === 0 ) { + $track[ $k ] = substr( $track[ $k ], strlen( $site_url ) ); + } + if ( 'data' === $k ) { + $track[ $k ] = preg_replace( '/^https?:\/\/|^\/+/i', '', $track[ $k ] ); + } + + // This way we don't lose search data. + if ( 'data' === $k && 'search' === $track['code'] ) { + $track[ $k ] = rawurlencode( $track[ $k ] ); + } else { + $track[ $k ] = preg_replace( '/[^a-z0-9\.\/\+\?=-]+/i', '_', $track[ $k ] ); + } + + $track[ $k ] = trim( $track[ $k ], '_' ); + } + $char = ( strpos( $track['data'], '?' ) === false ) ? '?' : '&'; + return str_replace( "'", "\'", "/{$track['code']}/{$track['data']}{$char}referer=" . rawurlencode( isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : '' ) ); // Input var okay. + } + + /** + * Maybe output or return, depending on the context + */ + private function _output_or_return( $val, $maybe ) { + if ( $maybe ) { + echo $val . "\r\n"; + } else { + return $val; + } + } + + /** + * This injects the Google Analytics code into the footer of the page. + * + * @param bool[optional] $output - defaults to true, false returns but does NOT echo the code. + */ + public function insert_code( $output = true ) { + // If $output is not a boolean false, set it to true (default). + $output = ( false !== $output); + + $tracking_id = $this->_get_tracking_code(); + if ( empty( $tracking_id ) ) { + return $this->_output_or_return( '<!-- Your Google Analytics Plugin is missing the tracking ID -->', $output ); + } + + // If we're in the admin_area, return without inserting code. + if ( is_admin() ) { + return $this->_output_or_return( '<!-- Your Google Analytics Plugin is set to ignore Admin area -->', $output ); + } + + $custom_vars = array( + "_gaq.push(['_setAccount', '{$tracking_id}']);", + ); + + $track = array(); + if ( is_404() ) { + // This is a 404 and we are supposed to track them. + $custom_vars[] = "_gaq.push( [ '_trackEvent', '404', document.location.href, document.referrer ] );"; + } elseif ( is_search() ) { + // Set track for searches, if it's a search, and we are supposed to. + $track['data'] = sanitize_text_field( wp_unslash( $_REQUEST['s'] ) ); // Input var okay. + $track['code'] = 'search'; + } + + if ( ! empty( $track ) ) { + $track['url'] = $this->_get_url( $track ); + // adjust the code that we output, account for both types of tracking. + $track['url'] = esc_js( str_replace( '&', '&', $track['url'] ) ); + $custom_vars[] = "_gaq.push(['_trackPageview','{$track['url']}']);"; + } else { + $custom_vars[] = "_gaq.push(['_trackPageview']);"; + } + + $async_code = "<!-- Jetpack Google Analytics --> + <script type='text/javascript'> + var _gaq = _gaq || []; + %custom_vars% + + (function() { + var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; + ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; + var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); + })(); + </script>"; + + $custom_vars_string = implode( "\r\n", $custom_vars ); + $async_code = str_replace( '%custom_vars%', $custom_vars_string, $async_code ); + + return $this->_output_or_return( $async_code, $output ); + } + + /** + * Used to get the tracking code option + * + * @return tracking code option value. + */ + private function _get_tracking_code() { + $o = get_option( 'jetpack_wga' ); + + if ( isset( $o['code'] ) && preg_match( '#UA-[\d-]+#', $o['code'], $matches ) ) { + return $o['code']; + } + + return ''; + } +} + +global $jetpack_google_analytics; +$jetpack_google_analytics = Jetpack_Google_Analytics::get_instance(); |