[Security] adds a chain user provider

1 files changed, 70 insertions, 0 deletions

diff --git a/Core/User/ChainUserProvider.php b/Core/User/ChainUserProvider.php
new file mode 100644
index 0000000..296d099
--- /dev/null
+++ b/Core/User/ChainUserProvider.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Symfony\Component\Security\Core\User;
+
+use Symfony\Component\Security\Core\Exception\UnsupportedAccountException;
+use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
+
+/**
+ * Chain User Provider.
+ *
+ * This provider calls several leaf providers in a chain until one is able to
+ * handle the request.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ChainUserProvider implements UserProviderInterface
+{
+    protected $providers;
+
+    public function __construct(array $providers)
+    {
+        $this->providers = $providers;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function loadUserByUsername($username)
+    {
+        foreach ($this->providers as $provider) {
+            try {
+                return $provider->loadUserByUsername($username);
+            } catch (UsernameNotFoundException $notFound) {
+                // try next one
+            }
+        }
+
+        throw new UsernameNotFoundException(sprintf('There is no user with name "%s".', $username));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function loadUserByAccount(AccountInterface $account)
+    {
+        foreach ($this->providers as $provider) {
+            try {
+                return $provider->loadUserByAccount($account);
+            } catch (UnsupportedAccountException $unsupported) {
+                // try next one
+            }
+        }
+
+        throw new UnsupportedAccountException(sprintf('The account "%s" is not supported.', get_class($account)));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function supportsClass($class)
+    {
+        foreach ($this->providers as $provider) {
+            if ($provider->supportsClass($class)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
\ No newline at end of file