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Decouple GTag rendering from the Analytics module.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| <?php | ||
|
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| namespace Google\Site_Kit\Core\Tags; | ||
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| use Google\Site_Kit\Core\Util\Method_Proxy_Trait; | ||
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| class GTag { | ||
| use Method_Proxy_Trait; | ||
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| const HANDLE = 'google_gtagjs'; | ||
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| private $tags = array(); | ||
| private $commands = array(); | ||
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| public function register() { | ||
| add_action( 'wp_enqueue_scripts', $this->get_method_proxy( 'enqueue_gtag_script' ), 20 ); | ||
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| add_filter( | ||
| 'wp_resource_hints', | ||
| function ( $urls, $relation_type ) { | ||
| if ( 'dns-prefetch' === $relation_type ) { | ||
| $urls[] = '//www.googletagmanager.com'; | ||
| } | ||
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| return $urls; | ||
| }, | ||
| 10, | ||
| 2 | ||
| ); | ||
| } | ||
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| public function add_tag( $tag_id, $config = array() ) { | ||
| $this->tags[] = array( | ||
| 'tag_id' => $tag_id, | ||
| 'config' => $config, | ||
| ); | ||
| } | ||
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| public function add_command( $command, ...$parameters ) { | ||
| $this->commands[] = array( | ||
| 'command' => $command, | ||
| 'parameters' => $parameters, | ||
| ); | ||
| } | ||
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| protected function enqueue_gtag_script() { | ||
| // $this->tags and $this->commands will be populated via this action's handlers. | ||
| do_action( 'googlesitekit_setup_gtag', $this ); | ||
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| if ( empty( $this->tags ) ) { | ||
| return; | ||
| } | ||
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| // Load the GTag scripts using the first tag ID - it doesn't matter which is used, all registered tags will be setup with a | ||
| // config command regardless of which is used to load the source. | ||
| $gtag_src = 'https://www.googletagmanager.com/gtag/js?id=' . rawurlencode( $this->tags[0]['tag_id'] ); | ||
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| // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion | ||
| wp_enqueue_script( self::HANDLE, $gtag_src, false, null, false ); | ||
| wp_script_add_data( self::HANDLE, 'script_execution', 'async' ); | ||
| wp_add_inline_script( self::HANDLE, 'window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);}' ); | ||
| wp_add_inline_script( self::HANDLE, 'gtag("js", new Date());' ); | ||
| wp_add_inline_script( self::HANDLE, 'gtag("set", "developer_id.dZTNiMT", true);' ); // Site Kit developer ID. | ||
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| foreach ( $this->tags as $tag ) { | ||
| wp_add_inline_script( self::HANDLE, $this->get_gtag_call_for_tag( $tag ) ); | ||
| } | ||
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| foreach ( $this->commands as $command ) { | ||
| wp_add_inline_script( self::HANDLE, $this->get_gtag_call_for_command( $command ) ); | ||
| } | ||
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| $filter_google_gtagjs = function ( $tag, $handle ) { | ||
| if ( self::HANDLE !== $handle ) { | ||
| return $tag; | ||
| } | ||
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| $snippet_comment_begin = sprintf( "\n<!-- %s -->\n", esc_html__( 'Google tag (gtag.js)snippet added by Site Kit', 'google-site-kit' ) ); | ||
| $snippet_comment_end = sprintf( "\n<!-- %s -->\n", esc_html__( 'End Google tag (gtag.js) snippet added by Site Kit', 'google-site-kit' ) ); | ||
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| return $snippet_comment_begin . $tag . $snippet_comment_end; | ||
| }; | ||
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| add_filter( 'script_loader_tag', $filter_google_gtagjs, 20, 2 ); | ||
| } | ||
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| protected function get_gtag_call_for_tag( $tag ) { | ||
| return empty( $tag['config'] ) | ||
| ? sprintf( 'gtag("config", "%s");', esc_js( $tag['tag_id'] ) ) | ||
| : sprintf( 'gtag("config", "%s", %s);', esc_js( $tag['tag_id'] ), wp_json_encode( $tag['config'] ) ); | ||
| } | ||
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| protected function get_gtag_call_for_command( $command ) { | ||
| $gtag_args = array_merge( array( $command['command'] ), $command['parameters'] ); | ||
| $gtag_args = array_map( | ||
| function( $arg ) { | ||
| return wp_json_encode( $arg ); | ||
| }, | ||
| $gtag_args | ||
| ); | ||
|
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| return sprintf( 'gtag(%s);', implode( ',', $gtag_args ) ); | ||
| } | ||
| } |
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