Add user group attachment from groups view

src/backend/app/Http/Controllers/Web/Admin/GroupRelationController.php

@@ -7,6 +7,8 @@ namespace App\Http\Controllers\Web\Admin;
 use Illuminate\View\View;
 use App\Http\Controllers\Controller;
 use Illuminate\Http\RedirectResponse;
+use Source\UseCases\GroupUser\AddUserToGroup\APIPresenter as UserToGroupPresenter;
+use Source\UseCases\GroupUser\AddUserToGroup\AddUserToGroupSearch;
 use Source\UseCases\GroupSchedule\AddSchedulesToGroups\ApiPresenter as ScheduleGroupPresenter;
 use Source\UseCases\GroupSchedule\AddSchedulesToGroups\AddSchedulesToGroupsUseCase;
 use Source\UseCases\GroupSchedule\GetGroupSchedules\WebPresenter as GroupSchedulesPresenter;
@@ -71,9 +73,23 @@ class GroupRelationController extends Controller
 
     }
 
-    public function addUser(): RedirectResponse
+    /**
+     * @param string                                                         $groupId
+     * @param \Source\UseCases\GroupUser\AddUserToGroup\AddUserToGroupSearch $addUserToGroupSearch
+     * @return \Illuminate\Http\RedirectResponse
+     * @throws \Illuminate\Validation\ValidationException
+     */
+    public function addUser(string $groupId, AddUserToGroupSearch $addUserToGroupSearch): RedirectResponse
     {
+        $this->validate($this->request, [
+            'user' => 'required|string',
+        ]);
+
+        $presenter = new UserToGroupPresenter();
 
+        $addUserToGroupSearch->addUserToGroup([$this->request->input('user')], [$groupId], $presenter);
+
+        return redirect()->back()->with($presenter->getViewModel());
     }
 
     /**

src/backend/src/UseCases/GroupUser/AddUserToGroup/AddUserToGroupSearch.php

+<?php
+
+namespace Source\UseCases\GroupUser\AddUserToGroup;
+
+use Source\Authorization\Authorizer;
+use Source\Gateways\Users\UsersRepository;
+use Source\Exceptions\AuthorizationException;
+use Source\Exceptions\EntityNotFoundException;
+use Source\Gateways\GroupUser\GroupUserRepository;
+
+class AddUserToGroupSearch implements AddUserToGroupUseCase
+{
+    /**
+     * @var \Source\Gateways\GroupUser\GroupUserRepository
+     */
+    protected GroupUserRepository $repository;
+
+    /**
+     * @var \Source\Authorization\Authorizer
+     */
+    protected Authorizer $authorizer;
+
+    /**
+     * @var \Source\Gateways\Users\UsersRepository
+     */
+    protected UsersRepository $users;
+
+    /**
+     * @param \Source\Authorization\Authorizer               $authorizer
+     * @param \Source\Gateways\GroupUser\GroupUserRepository $repository
+     * @param \Source\Gateways\Users\UsersRepository         $users
+     */
+    public function __construct(Authorizer $authorizer, GroupUserRepository $repository, UsersRepository $users)
+    {
+        $this->repository = $repository;
+        $this->authorizer = $authorizer;
+        $this->users = $users;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function addUserToGroup(array $userIds, array $groupIds, Presenter $presenter): void
+    {
+        $response = new ResponseModel();
+
+        foreach ($groupIds as $groupId) {
+            /*
+             * Not actually a userID, it could be... But it also could be an emplid or email
+             * So, user is emplid, email, or id
+             * Check all of them in this order:
+             *  - email
+             *  - emplid
+             *  - id
+             *
+             * emplid before id simply because in the case of a collision where
+             * id == emplid, it's more likely that they are typing in an emplid
+             */
+            foreach ($userIds as $query) {
+                try {
+                    $user = $this->users->findByEmail($query);
+
+                    if (!$user) {
+                        $user = $this->users->findByEmplid($query);
+                    }
+
+                    $id = $user ? $user->getId() : $query;
+
+                    $this->authorizer->protectAdminRights($id, $groupId);
+                    $this->repository->addUserToGroup($id, $groupId);
+                    $response->addMessage("Attached user $query to group $groupId");
+                } catch (EntityNotFoundException $e) {
+                    $response->addError("Failed to attach user $query to group $groupId. " . $e->getMessage());
+                } catch (AuthorizationException $e) {
+                    $response->addError("Failed to attach user $query to group $groupId. " . $e->getMessage());
+                }
+            }
+        }
+
+        $presenter->present($response);
+    }
+}