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Branch Module Implementation Summary

Overview

This document summarizes the implementation of the Branch Module for the backend system. Branches represent different physical locations of a company (e.g., Lagos HQ, Abuja Branch). Each branch can have departments, users, and assets assigned to it.

Implementation Details

1. Branch Entity

  • File: backend/src/branches/entities/branch.entity.ts
  • Fields:
    • id: Primary key (auto-generated)
    • name: Branch name (string, required)
    • address: Branch address (string, optional)
    • companyId: Foreign key to Company (integer, required)
    • createdAt: Creation timestamp
    • updatedAt: Last update timestamp
  • Relationships:
    • Many-to-One with Company
    • One-to-Many with Department
    • One-to-Many with Asset

2. DTOs (Data Transfer Objects)

  • CreateBranchDto: For creating new branches
  • UpdateBranchDto: For updating existing branches

3. Service Layer

  • File: backend/src/branches/branches.service.ts
  • Methods:
    • create(): Create a new branch
    • findAll(): Get all branches
    • findByCompany(): Get branches for a specific company
    • findOne(): Get a branch by ID
    • update(): Update a branch
    • remove(): Delete a branch
    • getBranchStats(): Get statistics for a branch (department count, asset count)

4. Controller Layer

  • File: backend/src/branches/branches.controller.ts
  • Endpoints:
    • POST /branches: Create a new branch
    • GET /branches: Get all branches
    • GET /branches/company/:companyId: Get branches for a company
    • GET /branches/:id: Get a branch by ID
    • GET /branches/:id/stats: Get branch statistics
    • PATCH /branches/:id: Update a branch
    • DELETE /branches/:id: Delete a branch

5. Module Configuration

  • File: backend/src/branches/branches.module.ts
  • Imports all required entities and configures the module

6. Entity Relationships

Updated related entities to establish proper relationships:

Department Entity

  • Added branchId field
  • Added Many-to-One relationship with Branch

Asset Entity

  • Added assignedBranchId field
  • Added Many-to-One relationship with Branch

7. Comprehensive Testing

  • File: backend/src/branches/branches.service.comprehensive.spec.ts
  • Tests cover all service methods including:
    • Success cases
    • Error handling (NotFoundException, ConflictException)
    • Edge cases
    • Relationship handling

Features Implemented

  1. ✅ Branches table linked to companies
  2. ✅ CRUD APIs for branches
  3. ✅ Relationship with departments
  4. ✅ Relationship with assets
  5. ✅ Comprehensive test coverage
  6. ✅ Error handling for edge cases
  7. ✅ Proper validation and documentation

API Endpoints

  • POST /branches - Create a new branch
  • GET /branches - Get all branches
  • GET /branches/company/:companyId - Get branches for a company
  • GET /branches/:id - Get a branch by ID
  • GET /branches/:id/stats - Get branch statistics
  • PATCH /branches/:id - Update a branch
  • DELETE /branches/:id - Delete a branch

Testing

The comprehensive test suite ensures:

  • All CRUD operations work correctly
  • Error cases are properly handled
  • Relationships are correctly managed
  • Statistics are calculated accurately