public function GoogleTagManager::getOutput in Analytics 8

Returns the output of the analytics service.

Return value

array A structured, renderable array.

Overrides ServicePluginBase::getOutput

File

src/Plugin/AnalyticsService/GoogleTagManager.php, line 85

Class

GoogleTagManager

Google Tag Manager analytics service plugin.

Namespace

Drupal\analytics\Plugin\AnalyticsService

Code

public function getOutput() {
  $output = [];
  $data_layer_name = $this->configuration['data_layer']['name'];
  if ($data = $this
    ->getData()) {
    $data_layer_json = json_encode($data, JSON_PRETTY_PRINT);
    $data_layer_js = <<<END
var {<span class="php-variable">$data_layer_name</span>} = window.dataLayer = window.dataLayer || [];
{<span class="php-variable">$data_layer_name</span>}.push({<span class="php-variable">$data_layer_json</span>});
END;
    $output['#attached']['html_head'][] = [
      [
        '#type' => 'html_tag',
        '#tag' => 'script',
        '#value' => Markup::create($data_layer_js),
        // This always needs to be super early.
        '#weight' => -900,
      ],
      'analytics_' . $this
        ->getServiceId() . '_data_layer',
    ];
  }
  if ($this->configuration['optimize_anti_flicker']) {

    // This only needs to be output once so it has the same ID every time.
    $output['#attached']['html_head'][] = [
      [
        '#type' => 'html_tag',
        '#tag' => 'style',
        '#value' => Markup::create('.async-hide { opacity: 0 !important}'),
      ],
      'google_analytics_optimize_anti_flicker_css',
    ];
    $optimize_js = <<<END
(function(a,s,y,n,c,h,i,d,e){s.className+=' '+y;h.start=1*new Date;
h.end=i=function(){s.className=s.className.replace(RegExp(' ?'+y),'')};
(a[n]=a[n]||[]).hide=h;setTimeout(function(){i();h.end=null},c);h.timeout=c;
})(window,document.documentElement,'async-hide','dataLayer',4000,
{'{<span class="php-variable">$this</span>-&gt;<span class="php-function-or-constant property member-of-self">configuration</span>[<span class="php-string">'container_id'</span>]}':true});
END;
    $output['#attached']['html_head'][] = [
      [
        '#type' => 'html_tag',
        '#tag' => 'script',
        '#value' => Markup::create($optimize_js),
      ],
      'analytics_' . $this
        ->getServiceId() . '_optimize_anti_flicker_js',
    ];
  }
  $tag_manager_js = <<<END
(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','{<span class="php-variable">$data_layer_name</span>}','{<span class="php-variable">$this</span>-&gt;<span class="php-function-or-constant property member-of-self">configuration</span>[<span class="php-string">'container_id'</span>]}');
END;
  $output['#attached']['html_head'][] = [
    [
      '#type' => 'html_tag',
      '#tag' => 'script',
      '#value' => AnalyticsJsMarkup::create($tag_manager_js),
    ],
    'analytics_' . $this
      ->getServiceId() . '_tag_manager',
  ];
  return $output;
}