Feature: Ability to Login with Email

Thanks to @gsumpster for https://github.com/getgrav/grav-plugin-admin/pull/685

* implemented email-login, close #674
* changed placeholder text
* Fix Utils namespace thing
* Drop use
* Cleanup styling

classes/admin.php

@@ -14,6 +14,7 @@ use Grav\Common\Themes;
 use Grav\Common\Uri;
 use Grav\Common\User\User;
 use Grav\Common\Utils;
+use Grav\Plugin\Admin\Utils as AdminUtils;
 use RocketTheme\Toolbox\File\File;
 use RocketTheme\Toolbox\File\JsonFile;
 use RocketTheme\Toolbox\ResourceLocator\UniformResourceIterator;
@@ -106,6 +107,9 @@ class Admin
         $this->permissions = [];
         $language = $this->grav['language'];
         
+        // Load utility class
+        require_once __DIR__ . '/utils.php';
+
         if ($language->enabled()) {
             $this->multilang = true;
             $this->languages_enabled = $this->grav['config']->get('system.languages.supported', []);
@@ -175,7 +179,12 @@ class Admin
     public function authenticate($data, $post)
     {
         if (!$this->user->authenticated && isset($data['username']) && isset($data['password'])) {
+            // Perform RegEX check on submitted username to check for emails
+            if (filter_var($data['username'], FILTER_VALIDATE_EMAIL)) {
+                $user = AdminUtils::findUserbyEmail($data['username']);
+            } else {
                 $user = User::load($data['username']);
+            }
 
             //default to english if language not set
             if (empty($user->language)) {

classes/utils.php

@@ -0,0 +1,36 @@
+<?php
+namespace Grav\Plugin\Admin;
+
+use Grav\Common\Grav;
+use Grav\Common\User\User;
+
+/**
+ * Admin utils class
+ *
+ * @license MIT
+ */
+class Utils
+{
+    /**
+     * Matches an email to a user
+     *
+     * @return User
+     */
+    public static function findUserbyEmail($email)
+    {
+        $account_dir = Grav::instance()['locator']->findResource('account://');
+        $files = array_diff(scandir($account_dir), ['.', '..']);
+
+        foreach ($files as $file) {
+            if (strpos($file, '.yaml') !== false) {
+                $user = User::load(trim(substr($file, 0, -5)));
+                if ($user['email'] == $email) {
+                    return $user;
+                }
+            }
+        }
+
+        // If a User with the provided email cannot be found, then load user with that email as the username
+        return User::load($email);
+    }
+}

languages/en.yaml

@@ -172,6 +172,7 @@ PLUGIN_ADMIN:
   FULL_NAME: "Full name"
   USERNAME: "Username"
   EMAIL: "Email"
+  USERNAME_EMAIL: "Username or Email"
   PASSWORD: "Password"
   PASSWORD_CONFIRM: "Confirm Password"
   TITLE: "Title"

pages/admin/login.md

@@ -9,7 +9,7 @@ form:
     fields:
         - name: username
           type: text
-          placeholder: PLUGIN_ADMIN.USERNAME
+          placeholder: PLUGIN_ADMIN.USERNAME_EMAIL
           autofocus: true
           validate:
             required: true