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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| <?php | ||
|
|
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| namespace Fractas\GoogleAnalytics; | ||
|
|
||
| use SilverStripe\Admin\AdminRootController; | ||
| use SilverStripe\Control\Director; | ||
| use SilverStripe\Control\HTTPRequest; | ||
| use SilverStripe\Control\Middleware\HTTPMiddleware; | ||
| use SilverStripe\Core\Config\Config; | ||
| use SilverStripe\Core\Config\Configurable; | ||
| use SilverStripe\Core\Injector\Injectable; | ||
| use SilverStripe\View\ArrayData; | ||
| use SilverStripe\View\HTML; | ||
|
|
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| class GoogleTagManagerMiddleware implements HTTPMiddleware | ||
| { | ||
| use Injectable; | ||
| use Configurable; | ||
|
|
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| /** | ||
| * @var string Google Tag Manager ID | ||
| */ | ||
| private $gtm_id = null; | ||
|
|
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| /** | ||
| * @var string Google Tag Manager domain | ||
| */ | ||
| private $gtm_domain = null; | ||
|
|
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| /** | ||
| * @var string Google Analytics domain | ||
| */ | ||
| private $ga_domain = null; | ||
|
|
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| /** | ||
| * Process request. | ||
| * | ||
| * @param HTTPRequest $request | ||
| * @param callable $delegate | ||
| * | ||
| * @return $response | ||
| */ | ||
| public function process(HTTPRequest $request, callable $delegate) | ||
| { | ||
| $response = $delegate($request); | ||
|
|
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| if (true === $this->getIsAdmin($request)) { | ||
| return $response; | ||
| } | ||
|
|
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| if ($this->getIsEnabled()) { | ||
| $this->gtm_id = Config::inst()->get(GoogleAnalyticsController::class, 'gtm_id'); | ||
| $this->gtm_domain = Config::inst()->get(GoogleAnalyticsController::class, 'gtm_domain'); | ||
| $this->ga_domain = Config::inst()->get(GoogleAnalyticsController::class, 'ga_domain'); | ||
|
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| $this->addBodyTag($response); | ||
| $this->addHeadTag($response); | ||
| $this->addPrefetchGA($response); | ||
| $this->addPrefetchGTM($response); | ||
| $this->addPreconnectGA($response); | ||
| $this->addPreconnectGTM($response); | ||
| } | ||
|
|
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| return $response; | ||
| } | ||
|
|
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| private function addBodyTag(&$response) | ||
| { | ||
| $data = ArrayData::create(['GTMID' => $this->gtm_id]); | ||
| $tag = $data->renderWith('GoogleTagManagerNoscriptCode'); | ||
| $body = $response->getBody(); | ||
| $pattern = '/\<body.*\>/'; | ||
| $replace = '${0}'."\n".$tag; | ||
| $newBody = preg_replace($pattern, $replace, $body); | ||
| $response->setBody($newBody); | ||
| } | ||
|
|
||
| private function addHeadTag(&$response) | ||
| { | ||
| $data = ArrayData::create(['GTMID' => $this->gtm_id]); | ||
| $tag = $data->renderWith('GoogleTagManagerCode'); | ||
| $body = $response->getBody(); | ||
| $body = str_replace('<head>', '<head>'.$tag, $body); | ||
| $response->setBody($body); | ||
| } | ||
|
|
||
| private function addPreconnectGA(&$response) | ||
| { | ||
| $atts = [ | ||
| 'rel' => 'preconnect', | ||
| 'href' => $this->ga_domain, | ||
| ]; | ||
| $pfTag = "\n".HTML::createTag('link', $atts)."\n"; | ||
| $body = $response->getBody(); | ||
| $body = str_replace('<head>', '<head>'.$pfTag, $body); | ||
| $response->setBody($body); | ||
| } | ||
|
|
||
| private function addPreconnectGTM(&$response) | ||
| { | ||
| $atts = [ | ||
| 'rel' => 'preconnect', | ||
| 'href' => $this->gtm_domain, | ||
| ]; | ||
| $pfTag = "\n".HTML::createTag('link', $atts)."\n"; | ||
| $body = $response->getBody(); | ||
| $body = str_replace('<head>', '<head>'.$pfTag, $body); | ||
| $response->setBody($body); | ||
| } | ||
|
|
||
| private function addPrefetchGA(&$response) | ||
| { | ||
| $atts = [ | ||
| 'rel' => 'dns-prefetch', | ||
| 'href' => $this->ga_domain, | ||
| ]; | ||
| $pfTag = "\n".HTML::createTag('link', $atts)."\n"; | ||
| $body = $response->getBody(); | ||
| $body = str_replace('<head>', '<head>'.$pfTag, $body); | ||
| $response->setBody($body); | ||
| } | ||
|
|
||
| private function addPrefetchGTM(&$response) | ||
| { | ||
| $atts = [ | ||
| 'rel' => 'dns-prefetch', | ||
| 'href' => $this->gtm_domain, | ||
| ]; | ||
| $pfTag = "\n".HTML::createTag('link', $atts)."\n"; | ||
| $body = $response->getBody(); | ||
| $body = str_replace('<head>', '<head>'.$pfTag, $body); | ||
| $response->setBody($body); | ||
| } | ||
|
|
||
| /** | ||
| * Determine whether the website is being viewed from an admin protected area or not | ||
| * (shamelessly stolen from https://github.com/silverstripe/silverstripe-subsites). | ||
| * | ||
| * @param HTTPRequest $request | ||
| * | ||
| * @return bool | ||
| */ | ||
| private function getIsAdmin(HTTPRequest $request) | ||
| { | ||
| $adminPaths = static::config()->get('admin_url_paths'); | ||
| $adminPaths[] = AdminRootController::config()->get('url_base').'/'; | ||
| $adminPaths[] = 'dev/'; | ||
| $currentPath = rtrim($request->getURL(), '/').'/'; | ||
| foreach ($adminPaths as $adminPath) { | ||
| if (substr($currentPath, 0, \strlen($adminPath)) === $adminPath) { | ||
| return true; | ||
| } | ||
| } | ||
|
|
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| return false; | ||
| } | ||
|
|
||
| /** | ||
| * @return bool Google Analytics is enabled by default if is in "live" mode | ||
| */ | ||
| private function getIsEnabled() | ||
| { | ||
| if (Director::isLive()) { | ||
| return true; | ||
| } elseif (Director::isDev() && Config::inst()->get(GoogleAnalyticsController::class, 'enable_in_dev')) { | ||
| return true; | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| <!-- Google Tag Manager --> | ||
| <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': | ||
| new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], | ||
| j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= | ||
| 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); | ||
| })(window,document,'script','dataLayer','$GTMID');</script> | ||
| <!-- End Google Tag Manager --> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,3 @@ | ||
| <!-- Google Tag Manager (noscript) --> | ||
| <noscript><iframe src="https://www.googletagmanager.com/ns.html?id={$GTMID}" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> | ||
| <!-- End Google Tag Manager (noscript) --> |