feat(backend): implement create admin API (ticket #97)

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/user/user.service.ts

@@ -3,6 +3,7 @@ import { InjectRepository } from "@nestjs/typeorm";
 import { RoleType, StatutUtilisateurType, Users } from "src/entities/users.entity";
 import { In, Repository } from "typeorm";
 import { CreateUserDto } from "./dto/create_user.dto";
+import { CreateAdminDto } from "./dto/create_admin.dto";
 import { UpdateUserDto } from "./dto/update_user.dto";
 import * as bcrypt from 'bcrypt';
 import { StatutValidationType, Validation } from "src/entities/validations.entity";
@@ -106,6 +107,31 @@ export class UserService {
         return this.findOne(saved.id);
     }
 
+    async createAdmin(dto: CreateAdminDto, currentUser: Users): Promise<Users> {
+        if (currentUser.role !== RoleType.SUPER_ADMIN) {
+             throw new ForbiddenException('Seuls les super administrateurs peuvent créer un administrateur');
+        }
+
+        const exist = await this.usersRepository.findOneBy({ email: dto.email });
+        if (exist) throw new BadRequestException('Email déjà utilisé');
+
+        const salt = await bcrypt.genSalt();
+        const hashedPassword = await bcrypt.hash(dto.password, salt);
+
+        const entity = this.usersRepository.create({
+            email: dto.email,
+            password: hashedPassword,
+            prenom: dto.prenom,
+            nom: dto.nom,
+            role: RoleType.ADMINISTRATEUR,
+            statut: StatutUtilisateurType.ACTIF,
+            telephone: dto.telephone,
+            changement_mdp_obligatoire: true,
+        });
+
+        return this.usersRepository.save(entity);
+    }
+
     async findAll(): Promise<Users[]> {
         return this.usersRepository.find();
     }