+<?php
+
+namespace BookStack\Providers;
+
+
+use BookStack\User;
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Contracts\Auth\UserProvider;
+
+class LdapUserProvider implements UserProvider
+{
+
+ /**
+ * The user model.
+ *
+ * @var string
+ */
+ protected $model;
+
+
+ /**
+ * LdapUserProvider constructor.
+ * @param $model
+ */
+ public function __construct($model)
+ {
+ $this->model = $model;
+ }
+
+ /**
+ * Create a new instance of the model.
+ *
+ * @return \Illuminate\Database\Eloquent\Model
+ */
+ public function createModel()
+ {
+ $class = '\\'.ltrim($this->model, '\\');
+
+ return new $class;
+ }
+
+
+ /**
+ * Retrieve a user by their unique identifier.
+ *
+ * @param mixed $identifier
+ * @return \Illuminate\Contracts\Auth\Authenticatable|null
+ */
+ public function retrieveById($identifier)
+ {
+ return $this->createModel()->newQuery()->find($identifier);
+ }
+
+ /**
+ * Retrieve a user by their unique identifier and "remember me" token.
+ *
+ * @param mixed $identifier
+ * @param string $token
+ * @return \Illuminate\Contracts\Auth\Authenticatable|null
+ */
+ public function retrieveByToken($identifier, $token)
+ {
+ $model = $this->createModel();
+
+ return $model->newQuery()
+ ->where($model->getAuthIdentifierName(), $identifier)
+ ->where($model->getRememberTokenName(), $token)
+ ->first();
+ }
+
+
+ /**
+ * Update the "remember me" token for the given user in storage.
+ *
+ * @param \Illuminate\Contracts\Auth\Authenticatable $user
+ * @param string $token
+ * @return void
+ */
+ public function updateRememberToken(Authenticatable $user, $token)
+ {
+ $user->setRememberToken($token);
+
+ $user->save();
+ }
+
+ /**
+ * Retrieve a user by the given credentials.
+ *
+ * @param array $credentials
+ * @return \Illuminate\Contracts\Auth\Authenticatable|null
+ */
+ public function retrieveByCredentials(array $credentials)
+ {
+ // TODO: Implement retrieveByCredentials() method.
+
+ // Get user via LDAP
+
+ // Search current user base by looking up a uid
+
+ // If not exists create a new user instance with attached role
+ // but do not store it in the database yet
+
+ //
+ }
+
+ /**
+ * Validate a user against the given credentials.
+ *
+ * @param \Illuminate\Contracts\Auth\Authenticatable $user
+ * @param array $credentials
+ * @return bool
+ */
+ public function validateCredentials(Authenticatable $user, array $credentials)
+ {
+ // TODO: Implement validateCredentials() method.
+ }
+}