erp_be/BACKEND_TASKS.md

ERP Backend — Development Tasks (Phase 1)

Reference: BACKEND_SETUP.md

Use this checklist when building or extending the backend. Follow the build order in Section 1.

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1. Project Scaffold

• Create package.json with dependencies and scripts from the spec
• Install dependencies (npm install)
• Add .env.example (never commit .env)
• Configure ESLint, Prettier, Husky, lint-staged
• Add jest.config.js with dotenv/config setup file

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2. Database & Prisma

• Define prisma/schema.prisma:
  • Auth: User, Role, Module, Permission, RolePermission, RefreshToken, PasswordResetToken
  • System: AuditLog, DocumentSeries
  • Business: Vendor (+ sub-tables), PurchaseOrder (+ items), GRN (+ items), Asset (+ transfers), all masters
• Use PascalCase models, snake_case fields, @@map to plural table names
• Add common columns on every business table: is_active, created_by, updated_by, created_at, updated_at, deleted_at
• Run npx prisma migrate dev --name init
• Run npx prisma generate
• Implement prisma/seed.js — bootstrap Super Admin user (modules/permissions/roles from DDL)
• Full idempotent seed (modules → permissions → roles → role_permissions) if not using DDL

Seed requirements

Step	Content
Modules	USERS, ROLES, MASTERS, VENDOR, PURCHASE_ORDER, GRN, ASSET
Permissions	Each module × view, create, edit, delete, approve, export (skip where N/A)
Roles	Super Admin, Admin, Purchase Manager, Store Manager, Accounts, Asset Manager
Bootstrap user	Super Admin, bcrypt-hashed password, status = active

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3. Core Infrastructure

• src/config/env.js — Joi validation; app must refuse to boot on invalid/missing env
• src/config/logger.js — Winston + daily rotate; redact sensitive keys
• src/config/morgan.js — HTTP logs into Winston with request ID + user
• src/config/prisma.js — singleton client with query/error logging
• src/config/swagger.js — OpenAPI 3.0 from src/docs/completed-routes.yaml
• src/utils/ — ApiError, ApiResponse, asyncHandler, encryption, auditLog, pagination, generateCode
• src/middlewares/ — requestId, error, validate, rateLimiter, auth, rbac, upload
• src/app.js — Helmet, CORS, HPP, compression, rate limit, routes, Swagger, 404, error handler
• src/server.js — graceful shutdown, BigInt JSON serializer, unhandled rejection/exception handlers
• Verify GET /health responds

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4. Modules (HMVC Pattern)

Build in this order. Each module: *.routes.js → *.controller.js → *.service.js → *.validation.js (+ *.repository.js for complex modules).

#	Module	Status	Notes
8	auth	[x] Done	login, refresh, logout, me; rotating hashed refresh tokens; account lockout
9	masters	[x] Done	14 sub-masters under masters/index.js (UOM template replicated)
—	users	[x] Done	CRUD + summary/filters/export; RBAC: USERS
—	roles	[x] Done	CRUD + permission assignment + matrix; RBAC: ROLES
10	vendors	[x] Done	CRUD + addresses/contacts/bank-details; encrypt bank accounts
11	purchase-orders	[x] Done	Header + line items; submit/approve/reject/amend/cancel; PDF export
12	grn	[x] Done	Receipt + PO status recalc + asset auto-creation
13	assets	[x] Done	CRUD + transfer + AMC/service visits/insurance + expiry alerts

Current progress:

• auth module (login, refresh, logout)
• users module (screen APIs: summary, filters, export, CRUD)
• roles module (cards, permission catalog, matrix, CRUD)
• masters/uom template + 13 replicated sub-masters
• Swagger docs for all completed routes (src/docs/completed-routes.yaml)
• vendors module (CRUD, status, addresses, contacts, bank-details)
• purchase-orders module (CRUD, workflow, PDF)
• grn module (transactional receipt, PO status recalc, asset auto-creation)
• assets module (CRUD, transfer, AMC, service visits, insurance, alerts)
• GET /auth/me (current user + permissions for FE)

Layer rules

Layer	Responsibility
Routes	HTTP mapping + middleware chain (authenticate → authorize → validate → controller)
Controller	Parse request, call service, return ApiResponse — no business logic, no Prisma
Service	Business logic, Prisma (or repository), auditLog on every mutation
Repository	Multi-table prisma.$transaction only (PO, GRN, Assets)
Validation	Joi schemas for body/query

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5. Module API List (Phase 1)

Base path: /api/v1 · Auth: Authorization: Bearer <accessToken> (except public auth routes)

System

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/health	—	App health (root, not under v1)
[x]	GET	/healthz	—	API v1 health
[x]	GET	/api-docs	—	Swagger UI
[x]	GET	/api-docs.json	—	OpenAPI spec

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Auth (/auth)

Status	Method	Endpoint	RBAC	Notes
[x]	POST	/auth/login	Public	Returns accessToken, refreshToken
[x]	POST	/auth/refresh	Public	Rotating refresh token
[x]	POST	/auth/logout	Public	Revoke refresh token
[ ]	POST	/auth/forgot-password	Public	Not implemented
[x]	GET	/auth/me	Authenticated	Current user + permissions (for FE)

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Users (/users) — module: USERS

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/users/summary	view	Dashboard cards (total/active/inactive/locked, roles count)
[x]	GET	/users/filters	view	Role, department, status dropdowns
[x]	GET	/users/export	export	CSV export (same filters as list)
[x]	GET	/users	view	Paginated list (search, status, role_id, department_id)
[x]	GET	/users/:id	view	User detail
[x]	POST	/users	create	Create user with role_ids[] (bcrypt password, mobile encrypted)
[x]	PUT	/users/:id	edit	Update user; optional role_ids[] replaces assigned roles
[x]	DELETE	/users/:id	delete	Soft delete

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Roles (/roles) — module: ROLES

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/roles/permissions	view	Permission catalog (modules × actions)
[x]	GET	/roles/cards	view	Role cards (name, description, user/permission counts)
[x]	GET	/roles	view	Paginated role list
[x]	GET	/roles/:id	view	Role detail with permissions
[x]	POST	/roles	create	Create role with optional initial permissions (permission_ids[] and/or view_modules[])
[x]	PUT	/roles/:id	edit	Update role
[x]	DELETE	/roles/:id	delete	Soft delete (blocked if users assigned)
[x]	PUT	/roles/:id/permissions	edit	Assign by permission_ids[] (replaces all)
[x]	GET	/roles/:id/permission-matrix	view	Matrix UI (view/create/edit/delete/approve/export)
[x]	PUT	/roles/:id/permission-matrix	edit	Save matrix checkboxes

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Masters (/masters/*) — module: MASTERS

Each sub-master supports: GET / (list), GET /:id, POST /, PUT /:id, DELETE /:id with RBAC view|create|edit|delete.

Status	Sub-master	Base path
[x]	UOM	/masters/uom
[x]	Item Categories	/masters/item-categories
[x]	Item Subcategories	/masters/item-subcategories
[x]	Items	/masters/items
[x]	Brands	/masters/brands
[x]	GST Rates	/masters/gst-rates
[x]	Payment Terms	/masters/payment-terms
[x]	Delivery Terms	/masters/delivery-terms
[x]	Asset Categories	/masters/asset-categories
[x]	Departments	/masters/departments
[x]	Designations	/masters/designations
[x]	Plants	/masters/plants
[x]	Warehouses	/masters/warehouses
[x]	Document Series	/masters/document-series

Masters total: 14 modules × 5 endpoints = 70 APIs [x]

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Vendors (/vendors) — module: VENDOR

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/vendors	view	List (search, status, vendor_type)
[x]	POST	/vendors	create	Auto vendor_code via VENDOR series
[x]	GET	/vendors/:id	view	Detail + addresses, contacts, bank details
[x]	PUT	/vendors/:id	edit	Update vendor
[x]	PATCH	/vendors/:id/status	edit	active / inactive / blacklisted
[x]	DELETE	/vendors/:id	delete	Soft delete
[x]	GET	/vendors/:vendorId/addresses	view	List addresses
[x]	POST	/vendors/:vendorId/addresses	create	Add address
[x]	GET	/vendors/:vendorId/addresses/:addressId	view	Get address
[x]	PUT	/vendors/:vendorId/addresses/:addressId	edit	Update address
[x]	DELETE	/vendors/:vendorId/addresses/:addressId	delete	Deactivate address
[x]	GET	/vendors/:vendorId/contacts	view	List contacts
[x]	POST	/vendors/:vendorId/contacts	create	Add contact
[x]	GET	/vendors/:vendorId/contacts/:contactId	view	Get contact
[x]	PUT	/vendors/:vendorId/contacts/:contactId	edit	Update contact
[x]	DELETE	/vendors/:vendorId/contacts/:contactId	delete	Deactivate contact
[x]	GET	/vendors/:vendorId/bank-details	view	List bank details (decrypted)
[x]	POST	/vendors/:vendorId/bank-details	create	Add bank detail (encrypted)
[x]	GET	/vendors/:vendorId/bank-details/:bankDetailId	view	Get bank detail
[x]	PUT	/vendors/:vendorId/bank-details/:bankDetailId	edit	Update bank detail
[x]	DELETE	/vendors/:vendorId/bank-details/:bankDetailId	delete	Deactivate bank detail

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Purchase Orders (/purchase-orders) — module: PURCHASE_ORDER

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/purchase-orders	view	List POs
[x]	GET	/purchase-orders/:id	view	PO detail + line items
[x]	POST	/purchase-orders	create	Create PO
[x]	PUT	/purchase-orders/:id	edit	Update PO
[x]	DELETE	/purchase-orders/:id	delete	Soft delete
[x]	POST	/purchase-orders/:id/submit	edit	Submit for approval
[x]	POST	/purchase-orders/:id/approve	approve	Approve PO
[x]	POST	/purchase-orders/:id/reject	approve	Reject PO
[x]	POST	/purchase-orders/:id/amend	edit	Amend PO
[x]	POST	/purchase-orders/:id/cancel	edit	Cancel PO
[x]	GET	/purchase-orders/:id/pdf	view	PDF export

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GRN (/grn) — module: GRN

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/grn	view	List GRNs
[x]	GET	/grn/:id	view	GRN detail + line items
[x]	POST	/grn	create	Create GRN (transactional)
[x]	PUT	/grn/:id	edit	Update GRN
[x]	POST	/grn/:id/cancel	edit	Cancel GRN
[x]	GET	/grn/:id/pdf	view	PDF export

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Assets (/assets) — module: ASSET

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/assets	view	List assets
[x]	GET	/assets/:id	view	Asset detail
[x]	POST	/assets	create	Create asset
[x]	PUT	/assets/:id	edit	Update asset
[x]	DELETE	/assets/:id	delete	Soft delete
[x]	POST	/assets/:id/transfer	edit	Transfer asset
[x]	GET	/assets/:id/transfer-history	view	Transfer history

AMC contracts (/assets/:id/amc)

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/assets/:id/amc	view	List AMC contracts
[x]	POST	/assets/:id/amc	create	Add AMC contract
[x]	GET	/assets/:id/amc/:contractId	view	AMC detail
[x]	PUT	/assets/:id/amc/:contractId	edit	Update AMC
[x]	PATCH	/assets/:id/amc/:contractId/renew	edit	Renew AMC (deactivate old, create new)

Service visits (/assets/:id/service-visits)

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/assets/:id/service-visits	view	List visits
[x]	POST	/assets/:id/service-visits	create	Log visit
[x]	GET	/assets/:id/service-visits/:visitId	view	Visit detail
[x]	PUT	/assets/:id/service-visits/:visitId	edit	Update visit
[x]	PATCH	/assets/:id/service-visits/:visitId/status	edit	Update visit status

Insurance (/assets/:id/insurance)

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/assets/:id/insurance	view	List policies
[x]	POST	/assets/:id/insurance	create	Add policy
[x]	GET	/assets/:id/insurance/:policyId	view	Policy detail
[x]	PUT	/assets/:id/insurance/:policyId	edit	Update policy
[x]	PATCH	/assets/:id/insurance/:policyId/renew	edit	Renew policy

Alerts (cross-asset)

Status	Method	Endpoint	RBAC	Notes
[x]	GET	/assets/alerts/expiry	view	AMC/Insurance/Warranty expiry (?days=30/60/90&type=)
[x]	GET	/assets/alerts/service	view	Overdue/upcoming service (?status=OVERDUE)

DB patch: run scripts/patch-assets-amc-insurance.sql then scripts/patch-assets-views.sql on deployed DB.

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API progress summary

Module	Endpoints done	Endpoints total	Status
System	4	4	[x] Done
Auth	3	5	[ ] Partial
Users	8	8	[x] Done
Roles	10	10	[x] Done
Masters	70	70	[x] Done
Vendors	20	20	[x] Done
Purchase Orders	11	11	[x] Done
GRN	6	6	[x] Done
Assets	24	24	[x] Done
Total	156	156	[x] Phase 1 APIs + Asset extensions

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6. Security Tasks

• JWT access tokens (15m) in Authorization: Bearer header
• Refresh tokens: opaque, SHA-256 hashed in DB, rotated on each refresh
• bcrypt password hashing (BCRYPT_SALT_ROUNDS=12)
• Account lockout after MAX_LOGIN_ATTEMPTS failures
• authenticate + authorize(module, action) on every protected route
• AES-256-GCM field encryption + HMAC blind index for searchable PII
• Rate limiting: global on /api, stricter on /auth/login and /auth/forgot-password
• Helmet, CORS (no * in production), HPP, compression
• File uploads: MIME allow-list, random filenames, RBAC-protected download (not direct web serve)
• auditLog() on every create/update/status-change/approve/reject (completed modules)
• X-Request-Id on every request for log correlation

RBAC permission actions

view, create, edit, delete, approve, export

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7. API Conventions

• Versioning: /api/v1/...
• Pagination: ?page=1&limit=20 (cap limit at 100); response meta: { page, limit, total }
• Filtering: ?status=...&search=... per module
• Sorting: ?sort=-created_at (- = descending)
• IDs: BigInt serialized as strings in JSON
• Dates: ISO 8601 UTC
• Soft delete: set deleted_at, never hard-delete transactional records
• Response envelope: { success, message, data?, meta?, errors? }

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8. Testing

• Jest + Supertest against app.js (no live server)
• Separate test DB via .env.test + prisma migrate deploy
• Mirror structure: tests/modules/<module>/<module>.test.js

Minimum Phase 1 coverage

• Auth: login, refresh, lockout
• RBAC: allowed vs forbidden
• Vendor: CRUD + status transitions
• PO: status lifecycle
• GRN: partial receipt → PO status recalculation

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9. Documentation & DevOps

• OpenAPI spec for completed routes (src/docs/completed-routes.yaml + /api-docs)
• Add @swagger JSDoc blocks to route files (optional; YAML spec in use)
• Dockerfile (Node 20 Alpine)
• docker-compose.yml (API + Postgres 15)
• Verify docker-compose up boots API + Postgres
• Run npm audit in CI

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10. Future Development Guidelines

When adding a new module or endpoint:

1. Add Prisma model with common columns + soft delete
2. Add module/permissions to seed (if new domain)
3. Create the four-file HMVC module (five if multi-table transactions)
4. Register routes in src/routes/v1/index.js
5. Apply middleware chain: authenticate → authorize(MODULE, action) → validate(schema) → controller
6. Call auditLog() in service for all mutations
7. Use nextDocumentNumber() for auto-generated codes
8. Encrypt PII at service layer with blind index for search
9. Add Swagger JSDoc + Jest tests
10. Breaking API changes → new version (/api/v2)

Complex transaction modules

Use *.repository.js with prisma.$transaction when a single operation touches multiple tables (e.g. PO header + items, GRN + PO qty update + asset creation).

Masters replication

Copy the UOM module pattern for new masters: simple name/code fields, RBAC code MASTERS, no document numbering.