Issue #3313874: Add ability to evaluate conditions like the block visibility settings

docs/cheat-sheet.md

@@ -351,6 +351,15 @@ ensure that cache metadata are bubbled up.
 {{ content.field_media|cache_metadata }}
 ```
 
+## Conditions from context
+The system that controls the visibility of blocks can be used to evaluate
+if a condition is fullfilled.
+```twig
+{% if languageIsSpanish = drupal_condition_evaluate('language', {'langcodes': {'es':'es'}})  %}
+Hola
+{% endif %}
+```
+
 ## PHP
 PHP filter is disabled by default. You can enable it in `settings.php` file as
 follows:

src/TwigTweakExtension.php

@@ -86,6 +86,8 @@ class TwigTweakExtension extends AbstractExtension {
       new TwigFunction('drupal_breakpoint', [self::class, 'drupalBreakpoint'], $all_options),
       // @phpcs:ignore Drupal.Arrays.Array.LongLineDeclaration
       new TwigFunction('drupal_contextual_links', [self::class, 'drupalContextualLinks']),
+      // @phpcs:ignore Drupal.Arrays.Array.LongLineDeclaration
+      new TwigFunction('drupal_condition_evaluate', [self::class, 'drupalConditionEvaluate']),
     ];
 
     $this->moduleHandler->alter('twig_tweak_functions', $functions);
@@ -420,6 +422,37 @@ class TwigTweakExtension extends AbstractExtension {
     return $build;
   }
 
+  /**
+   * Use a condition plugin to evaluate based on the context.
+   *
+   * @param string $plugin_id
+   *   The plugin ID.
+   * @param array $configuration
+   *   Configuration for the plugin.
+   *
+   * @return bool
+   *   The evaluation of the plugin.
+   */
+  public static function drupalConditionEvaluate(string $plugin_id, array $configuration = []): bool {
+    $pluginInstance = \Drupal::service('plugin.manager.condition')->createInstance($plugin_id);
+    $pluginInstance->setConfiguration($configuration);
+    $contextRepository = \Drupal::service('context.repository');
+    $availableContexts = $contextRepository->getAvailableContexts();
+
+    // Ensure that the contexts have data by getting corresponding runtime contexts.
+    $availableRuntimeContexts = $contextRepository->getRuntimeContexts(array_keys($availableContexts));
+    $pluginContextDefinitions = $pluginInstance->getContextDefinitions();
+    foreach ($pluginContextDefinitions as $name => $pluginContextDefinition) {
+      // Identify and fetch the matching runtime context, with the plugin's context definition.
+      $matches = \Drupal::service('context.handler')->getMatchingContexts($availableRuntimeContexts, $pluginContextDefinition);
+      $matchingContext = reset($matches);
+
+      // Set the value to the plugin's context, from runtime context value.
+      $pluginInstance->setContextValue($name, $matchingContext->getContextValue());
+    }
+    return $pluginInstance->evaluate();
+  }
+
   /**
    * Emits a breakpoint to the debug client.
    *