Issue #2151101 by joelpittet: Convert theme_status_report() to Twig.

core/modules/system/system.admin.inc

@@ -268,7 +268,9 @@ function theme_system_admin_index($variables) {
 }
 
 /**
- * Returns HTML for the status report.
+ * Prepares variables for status report template.
+ *
+ * Default template: status-report.html.twig.
  *
  * This theme function is dependent on install.inc being loaded, because
  * that's where the constants are defined.
@@ -288,8 +290,7 @@ function theme_system_admin_index($variables) {
  *
  * @ingroup themeable
  */
-function theme_status_report($variables) {
-  $requirements = $variables['requirements'];
+function template_preprocess_status_report(&$variables) {
   $severities = array(
     REQUIREMENT_INFO => array(
       'title' => t('Info'),
@@ -308,11 +309,8 @@ function theme_status_report($variables) {
       'class' => 'error',
     ),
   );
-  $output = '<table class="system-status-report"><thead><tr class="visually-hidden">';
-  $output .= '<th>' . t('Status') . '</th><th>' . t('Component') . '</th><th>' . t('Details') . '</th>';
-  $output .= '</tr></thead><tbody>';
 
-  foreach ($requirements as $requirement) {
+  foreach ($variables['requirements'] as $i => $requirement) {
     // Always use the explicit requirement severity, if defined. Otherwise,
     // default to REQUIREMENT_OK in the installer to visually confirm that
     // installation requirements are met. And default to REQUIREMENT_INFO to
@@ -326,29 +324,9 @@ function theme_status_report($variables) {
     else {
       $severity = $severities[REQUIREMENT_INFO];
     }
-    // hook_requirements does not require value to be set. Set to null if not:
-    if (isset($requirement['value'])) {
-      $value = $requirement['value'];
-    }
-    else {
-      $value = NULL;
-    }
-
-    $severity['icon'] = '<div title="' . $severity['title'] . '"><span class="visually-hidden">' . $severity['title'] . '</span></div>';
-
-    // Output table rows.
-    $output .= '<tr class="' . $severity['class'] . '">';
-    $output .= '<td class="status-icon">' . $severity['icon'] . '</td>';
-    $output .= '<td class="status-title">' . $requirement['title'] . '</td>';
-    $output .= '<td class="status-value">' . $value;
-    if (!empty($requirement['description'])) {
-      $output .= '<div class="description">' . $requirement['description'] . '</div>';
-    }
-    $output .= '</td></tr>';
+    $variables['requirements'][$i]['severity_class'] = $severity['class'];
+    $variables['requirements'][$i]['severity_title'] = $severity['title'];
   }
-
-  $output .= '</tbody></table>';
-  return $output;
 }
 
 /**

core/modules/system/system.module

@@ -177,6 +177,7 @@ function system_theme() {
     'status_report' => array(
       'variables' => array('requirements' => NULL),
       'file' => 'system.admin.inc',
+      'template' => 'status-report',
     ),
     'admin_page' => array(
       'variables' => array('blocks' => NULL),

core/modules/system/templates/status-report.html.twig

+{#
+/**
+ * Default theme implementation for the status report.
+ *
+ * Available variables:
+ * - requirements: Contains multiple requirement instances.
+ *   Each requirement contains:
+ *   - title: The title of the requirement.
+ *   - value: (optional) The requirement's status.
+ *   - description: (optional) The requirement's description.
+ *   - severity_title: The title of the severity.
+ *   - severity_class: The HTML class of the severity.
+ *
+ * @see template_preprocess_status_report()
+ *
+ * @ingroup themeable
+ */
+#}
+<table class="system-status-report">
+  <thead>
+    <tr class="visually-hidden">
+      <th>{{ 'Status'|t }}</th><th>{{ 'Component'|t }}</th><th>{{ 'Details'|t }}</th>
+    </tr>
+  </thead>
+  <tbody>
+  {% for requirement in requirements %}
+    <tr class="{{ requirement.severity_class }}">
+      <td class="status-icon">
+        <div title="{{ requirement.severity_title }}">
+          <span class="visually-hidden">{{ requirement.severity_title }}</span>
+        </div>
+      </td>
+      <td class="status-title">{{ requirement.title }}</td>
+      <td class="status-value">
+        {{ requirement.value }}
+        {% if requirement.description %}
+          <div class="description">{{ requirement.description }}</div>
+        {% endif %}
+      </td>
+    </tr>
+  {% endfor %}
+  </tbody>
+</table>