feat: new api call to check if username exists

Author: david-roper

apps/api/src/users/users.controller.ts

@@ -12,6 +12,13 @@ import { UsersService } from './users.service';
 export class UsersController {
   constructor(private readonly usersService: UsersService) {}
 
+  @ApiOperation({ summary: 'Get User by Username' })
+  @Get('/check-username/:username')
+  @RouteAccess({ action: 'read', subject: 'User' })
+  checkUsernameExists(@Param('username') username: string, @CurrentUser('ability') ability: AppAbility) {
+    return this.usersService.checkUsernameExists(username, { ability });
+  }
+
   @ApiOperation({ summary: 'Create User' })
   @Post()
   @RouteAccess({ action: 'create', subject: 'User' })
@@ -40,13 +47,6 @@ export class UsersController {
     return this.usersService.findById(id, { ability });
   }
 
-  @ApiOperation({ summary: 'Get User by Username' })
-  @Get('/check-username/:username')
-  @RouteAccess({ action: 'read', subject: 'User' })
-  findByUsername(@Param('username') username: string, @CurrentUser('ability') ability: AppAbility) {
-    return this.usersService.findByUsername(username, { ability });
-  }
-
   @ApiOperation({ summary: 'Update User' })
   @Patch(':id')
   @RouteAccess({ action: 'update', subject: 'User' })

apps/api/src/users/users.service.ts

@@ -17,6 +17,20 @@ export class UsersService {
     private readonly groupsService: GroupsService
   ) {}
 
+  async checkUsernameExists(username: string, { ability }: EntityOperationOptions = {}) {
+    const user = await this.userModel.findFirst({
+      include: { groups: true },
+      omit: {
+        hashedPassword: true
+      },
+      where: { AND: [accessibleQuery(ability, 'read', 'User'), { username }] }
+    });
+    if (!user) {
+      return false;
+    }
+    return user;
+  }
+
   async count(
     filter: NonNullable<Parameters<Model<'User'>['count']>[0]>['where'] = {},
     { ability }: EntityOperationOptions = {}