Added member and invitation endpoints

app/Service/UserService.php

@@ -4,12 +4,19 @@ declare(strict_types=1);
 
 namespace App\Service;
 
+use App\Enums\Role;
+use App\Models\Membership;
 use App\Models\Organization;
+use App\Models\ProjectMember;
 use App\Models\TimeEntry;
 use App\Models\User;
 
 class UserService
 {
+    /**
+     * Assign all organization entities (time entries, project members) from one user to another.
+     * This is useful when a placeholder user is replaced with a real user.
+     */
     public function assignOrganizationEntitiesToDifferentUser(Organization $organization, User $fromUser, User $toUser): void
     {
         // Time entries
@@ -19,5 +26,39 @@ class UserService
             ->update([
                 'user_id' => $toUser->getKey(),
             ]);
+
+        // Project members
+        ProjectMember::query()
+            ->whereBelongsToOrganization($organization)
+            ->whereBelongsTo($fromUser, 'user')
+            ->update([
+                'user_id' => $toUser->getKey(),
+            ]);
+    }
+
+    /**
+     * Change the ownership of an organization to a new user.
+     * The previous owner will be demoted to an admin.
+     */
+    public function changeOwnership(Organization $organization, User $newOwner): void
+    {
+        $organization->update([
+            'user_id' => $newOwner->getKey(),
+        ]);
+        $userMembership = Membership::query()
+            ->whereBelongsTo($organization, 'organization')
+            ->whereBelongsTo($newOwner, 'user')
+            ->first();
+        $userMembership->role = Role::Owner->value;
+        $userMembership->save();
+        $oldOwners = Membership::query()
+            ->whereBelongsTo($organization, 'organization')
+            ->where('role', '=', Role::Owner->value)
+            ->where('user_id', '!=', $newOwner->getKey())
+            ->get();
+        foreach ($oldOwners as $oldOwner) {
+            $oldOwner->role = Role::Admin->value;
+            $oldOwner->save();
+        }
     }
 }