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