bludit/bl-plugins/google/plugin.php

<?php

class pluginGoogle extends Plugin {

        public function init()
        {
                $this->dbFields = array(
                        'google-site-verification'=>'',
                        'google-analytics-tracking-id'=>'',
                        'google-tag-manager'=>''
                );
        }

        public function form()
        {
                global $Language;

                $html  = '<div>';
                $html .= '<label>'.$Language->get('Google Webmasters tools').'</label>';
                $html .= '<input type="text" name="google-site-verification" value="'.$this->getDbField('google-site-verification').'">';
                $html .= '<span class="tip">'.$Language->get('complete-this-field-with-the-google-site-verification').'</span>';
                $html .= '</div>';

                $html .= '<div>';
                $html .= '<label>'.$Language->get('Google Analytics Tracking ID').'</label>';
                $html .= '<input type="text" name="google-analytics-tracking-id" value="'.$this->getDbField('google-analytics-tracking-id').'">';
                $html .= '<span class="tip">'.$Language->get('complete-this-field-with-the-tracking-id').'</span>';
                $html .= '</div>';

                $html .= '<div>';
                $html .= '<label>'.$Language->get('Google Tag Manager').'</label>';
                $html .= '<input type="text" name="google-tag-manager" value="'.$this->getDbField('google-tag-manager').'">';
                $html .= '<span class="tip">'.$Language->get('complete-this-field-with-the-tracking-id-google-tag').'</span>';
                $html .= '</div>';

                return $html;
        }

        public function siteHead()
        {
                global $Url;

                $html = "";

                // Google HTML tag
                if( $this->getValue('google-site-verification') && $Url->whereAmI()=='home' ) {
                        $html .= PHP_EOL."<!-- Google HTML tag -->".PHP_EOL;
                        $html .= '<meta name="google-site-verification" content="'.$this->getDbField('google-site-verification').'" />'.PHP_EOL;
                }

                // Google Tag Manager
                if( $this->getValue('google-tag-manager') ) {
                        $html .= PHP_EOL."<!-- Google Tag Manager -->";
                        $html .= "<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':".PHP_EOL;
                        $html .= "new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],".PHP_EOL;
                        $html .= "j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=".PHP_EOL;
                        $html .= "'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);".PHP_EOL;
                        $html .= "})(window,document,'script','dataLayer','".$this->getValue('google-tag-manager')."');</script>".PHP_EOL;
                        $html .= "<!-- End Google Tag Manager -->".PHP_EOL;
                }

                // Google Analytics
                if( $this->getValue('google-analytics-tracking-id') ) {
                        $html .= PHP_EOL."<!-- Google Analytics -->";
                        $html .= '
                        <script async src="https://www.googletagmanager.com/gtag/js?id='.$this->getValue('google-analytics-tracking-id').'"></script>
                        <script>
                                window.dataLayer = window.dataLayer || [];
                                function gtag(){dataLayer.push(arguments);}
                                gtag("js", new Date());

                                gtag("config", "'.$this->getValue('google-analytics-tracking-id').'");
                        </script>'.PHP_EOL;
                }

                return $html;
        }

        public function siteBodyBegin()
        {
                // Google Tag Manager
                if ($this->getValue('google-tag-manager')) {
                        $html  = '<!-- Google Tag Manager (noscript) -->';
                        $html .= '<noscript><iframe src="https://www.googletagmanager.com/ns.html?id='.$this->getValue('google-tag-manager').'" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>'.PHP_EOL;
                        $html .= '<!-- End Google Tag Manager (noscript) -->'.PHP_EOL;
                        return $html;
                }
                return false;
        }

}