diff core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/lib/Drupal/Core/ParamConverter/ParamConverterManager.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,111 @@
+<?php
+
+namespace Drupal\Core\ParamConverter;
+
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * Manages converter services for converting request parameters to full objects.
+ *
+ * A typical use case for this would be upcasting (converting) a node id to a
+ * node entity.
+ */
+class ParamConverterManager implements ParamConverterManagerInterface {
+
+  /**
+   * Array of loaded converter services keyed by their ids.
+   *
+   * @var array
+   */
+  protected $converters = [];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function addConverter(ParamConverterInterface $param_converter, $id) {
+    $this->converters[$id] = $param_converter;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConverter($converter) {
+    if (isset($this->converters[$converter])) {
+      return $this->converters[$converter];
+    }
+    else {
+      throw new \InvalidArgumentException(sprintf('No converter has been registered for %s', $converter));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRouteParameterConverters(RouteCollection $routes) {
+    foreach ($routes->all() as $route) {
+      if (!$parameters = $route->getOption('parameters')) {
+        // Continue with the next route if no parameters have been defined.
+        continue;
+      }
+
+      // Loop over all defined parameters and look up the right converter.
+      foreach ($parameters as $name => &$definition) {
+        if (isset($definition['converter'])) {
+          // Skip parameters that already have a manually set converter.
+          continue;
+        }
+
+        foreach (array_keys($this->converters) as $converter) {
+          if ($this->getConverter($converter)->applies($definition, $name, $route)) {
+            $definition['converter'] = $converter;
+            break;
+          }
+        }
+      }
+
+      // Override the parameters array.
+      $route->setOption('parameters', $parameters);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function convert(array $defaults) {
+    /** @var $route \Symfony\Component\Routing\Route */
+    $route = $defaults[RouteObjectInterface::ROUTE_OBJECT];
+
+    // Skip this enhancer if there are no parameter definitions.
+    if (!$parameters = $route->getOption('parameters')) {
+      return $defaults;
+    }
+
+    // Invoke the registered converter for each parameter.
+    foreach ($parameters as $name => $definition) {
+      if (!isset($defaults[$name])) {
+        // Do not try to convert anything that is already set to NULL.
+        continue;
+      }
+
+      if (!isset($definition['converter'])) {
+        // Continue if no converter has been specified.
+        continue;
+      }
+
+      // If a converter returns NULL it means that the parameter could not be
+      // converted.
+      $value = $defaults[$name];
+      $defaults[$name] = $this->getConverter($definition['converter'])->convert($value, $definition, $name, $defaults);
+      if (!isset($defaults[$name])) {
+        $message = 'The "%s" parameter was not converted for the path "%s" (route name: "%s")';
+        $route_name = $defaults[RouteObjectInterface::ROUTE_NAME];
+        throw new ParamNotConvertedException(sprintf($message, $name, $route->getPath(), $route_name), 0, NULL, $route_name, [$name => $value]);
+      }
+    }
+
+    return $defaults;
+  }
+
+}