_google_tag_script_snippet(), 'noscript' => _google_tag_noscript_snippet(), 'data_layer' => _google_tag_data_layer_snippet(), ); // Allow other modules to alter the snippets. drupal_alter('google_tag_snippets', $snippets); return $snippets; } /** * Returns JavaScript script snippet. * * @return array * The script snippet. */ function _google_tag_script_snippet() { // Gather data. $container_id = _google_tag_variable_clean('google_tag_container_id'); $data_layer = _google_tag_variable_clean('google_tag_data_layer', 'dataLayer'); $query = _google_tag_environment_query(); $compact = variable_get('google_tag_compact_snippet', 1); // Build script snippet. $script = << $script EOS; */ return $script; } /** * Returns JavaScript noscript snippet. * * @return array * The noscript snippet. */ function _google_tag_noscript_snippet() { // Gather data. $container_id = _google_tag_variable_clean('google_tag_container_id'); $query = _google_tag_environment_query(); $compact = variable_get('google_tag_compact_snippet', 1); // Build noscript snippet. $noscript = << EOS; if ($compact) { $noscript = str_replace("\n", '', $noscript); } /* $noscript = << $noscript EOS; */ return $noscript; } /** * Returns JavaScript data layer snippet or adds items to data layer. * * @return string|null * The data layer snippet or NULL. */ function _google_tag_data_layer_snippet(&$classes = array()) { // Gather data. $data_layer = _google_tag_variable_clean('google_tag_data_layer', 'dataLayer'); $whitelist = variable_get('google_tag_whitelist_classes', GOOGLE_TAG_WHITELIST_CLASSES); $blacklist = variable_get('google_tag_blacklist_classes', GOOGLE_TAG_BLACKLIST_CLASSES); $classes = array(); $names = array('whitelist', 'blacklist'); foreach ($names as $name) { google_tag_text_clean($$name, 'array'); if (empty($$name)) { continue; } $classes["gtm.$name"] = $$name; } // Build data layer snippet. $script = $classes ? "var $data_layer = [" . drupal_json_encode($classes) . '];' : ''; return $script; } /** * Returns a query string with the environment parameters. * * @return string * The query string. */ function _google_tag_environment_query() { if (!variable_get('google_tag_include_environment', 0)) { return ''; } // Gather data. $environment_id = _google_tag_variable_clean('google_tag_environment_id'); $environment_token = _google_tag_variable_clean('google_tag_environment_token'); // Build query string. return ">m_auth=$environment_token>m_preview=$environment_id>m_cookies_win=x"; } /** * Returns a cleansed variable. * * @param string $variable * The variable name. * @param string $variable * The default value for the variable. * * @return string * The cleansed variable. */ function _google_tag_variable_clean($variable, $default = '') { return trim(drupal_json_encode(variable_get($variable, $default)), '"'); }