8.8 KiB
8.8 KiB
Multi-Tenant Ecommerce Platform - Vertical Slices Overview
📋 Development Approach
This project follows a vertical slice development approach, delivering complete, working user workflows incrementally. Each slice is fully functional and provides immediate value.
🎯 Technology Stack
Backend
- Framework: FastAPI (Python 3.11+)
- Database: PostgreSQL with SQLAlchemy ORM
- Authentication: JWT tokens with bcrypt
- Background Jobs: Celery (for async tasks)
- API Documentation: Auto-generated OpenAPI/Swagger
Frontend
- Templating: Jinja2 (server-side rendering)
- JavaScript Framework: Alpine.js v3.x (15KB, CDN-based)
- Styling: Custom CSS with CSS variables
- AJAX: Vanilla JavaScript with Fetch API
- No Build Step: Everything runs directly in the browser
Why Alpine.js + Jinja2?
- ✅ Lightweight: Only 15KB, no build step required
- ✅ Perfect Jinja2 Integration: Works seamlessly with server-side templates
- ✅ Reactive State: Modern UX without framework complexity
- ✅ Scoped Components: Natural vendor isolation
- ✅ Progressive Enhancement: Works even if JS fails
- ✅ Minimal Learning Curve: Feels like inline JavaScript
📚 Slice Documentation Structure
Each slice has its own comprehensive markdown file:
Slice 1: Multi-Tenant Foundation ✅ IN PROGRESS
File: 01_slice1_admin_vendor_foundation.md
- Admin creates vendors through admin interface
- Vendor owner login with context detection
- Complete vendor data isolation
- Status: Backend mostly complete, frontend in progress
Slice 2: Marketplace Integration
File: 02_slice2_marketplace_import.md
- CSV import from Letzshop marketplace
- Background job processing
- Product staging area
- Import status tracking with Alpine.js
Slice 3: Product Catalog Management
File: 03_slice3_product_catalog.md
- Browse imported products in staging
- Select and publish to vendor catalog
- Product customization (pricing, descriptions)
- Inventory management
Slice 4: Customer Shopping Experience
File: 04_slice4_customer_shopping.md
- Public product browsing
- Customer registration/login
- Shopping cart with Alpine.js reactivity
- Product search functionality
Slice 5: Order Processing
File: 05_slice5_order_processing.md
- Checkout workflow
- Order placement
- Order management (vendor side)
- Order history (customer side)
🎯 Slice Completion Criteria
Each slice must pass these gates before moving to the next:
Technical Criteria
- All backend endpoints implemented and tested
- Frontend pages created with Jinja2 templates
- Alpine.js components working (where applicable)
- Database migrations applied successfully
- Service layer business logic complete
- Exception handling implemented
- API documentation updated
Quality Criteria
- Manual testing complete (all user flows)
- Security validation (vendor isolation)
- Performance acceptable (basic load testing)
- No console errors in browser
- Responsive design works on mobile
- Code follows project conventions
Documentation Criteria
- Slice markdown file updated
- API endpoints documented
- Frontend components documented
- Database changes documented
- Testing checklist completed
🗓️ Estimated Timeline
Week 1: Slice 1 - Foundation ⏳ Current
- Days 1-3: Backend completion (vendor context, admin APIs)
- Days 4-5: Frontend completion (admin pages, vendor login)
- Deliverable: Admin can create vendors, vendor owners can log in
Week 2: Slice 2 - Import
- Days 1-3: Import backend (CSV processing, job tracking)
- Days 4-5: Import frontend (upload UI, status tracking)
- Deliverable: Vendors can import products from Letzshop
Week 3: Slice 3 - Catalog
- Days 1-3: Catalog backend (product publishing, inventory)
- Days 4-5: Catalog frontend (product management UI)
- Deliverable: Vendors can manage product catalog
Week 4: Slice 4 - Shopping
- Days 1-3: Customer backend (registration, cart, products)
- Days 4-5: Shop frontend (product browsing, cart)
- Deliverable: Customers can browse and add to cart
Week 5: Slice 5 - Orders
- Days 1-3: Order backend (checkout, order management)
- Days 4-5: Order frontend (checkout flow, order history)
- Deliverable: Complete order workflow functional
📊 Progress Tracking
✅ Completed
- Database schema design
- Core models (User, Vendor, Roles)
- Authentication system
- Admin service layer
- Vendor context detection middleware
🔄 In Progress (Slice 1)
- Admin frontend pages (login, dashboard, vendors)
- Vendor frontend pages (login, dashboard)
- Admin API endpoints refinement
- Frontend-backend integration
📋 Upcoming (Slice 2)
- MarketplaceProduct model
- ImportJob model
- CSV processing service
- Import frontend with Alpine.js
🎨 Frontend Architecture Pattern
Page Structure (Jinja2 + Alpine.js)
{% extends "base.html" %}
{% block content %}
<div x-data="componentName()">
<!-- Alpine.js reactive component -->
<h1 x-text="title"></h1>
<!-- Jinja2 for initial data -->
<script>
window.initialData = {{ data|tojson }};
</script>
</div>
{% endblock %}
{% block scripts %}
<script src="/static/js/admin/component.js"></script>
{% endblock %}
Alpine.js Component Pattern
function componentName() {
return {
// State
data: window.initialData || [],
loading: false,
error: null,
// Lifecycle
init() {
this.loadData();
},
// Methods
async loadData() {
this.loading = true;
try {
const response = await apiClient.get('/api/endpoint');
this.data = response;
} catch (error) {
this.error = error.message;
} finally {
this.loading = false;
}
}
}
}
🔑 Key Principles
1. Complete Features
Each slice delivers a complete, working feature from database to UI.
2. Vendor Isolation
All slices maintain strict vendor data isolation and context detection.
3. Progressive Enhancement
- HTML works without JavaScript
- Alpine.js enhances interactivity
- Jinja2 provides server-side rendering
4. API-First Design
- Backend exposes RESTful APIs
- Frontend consumes APIs via Fetch
- Clear separation of concerns
5. Clean Architecture
- Service layer for business logic
- Repository pattern for data access
- Exception-first error handling
- Dependency injection
📖 Documentation Files
Slice Files (This Directory)
00_slices_overview.md- This file01_slice1_admin_vendor_foundation.md02_slice2_marketplace_import.md03_slice3_product_catalog.md04_slice4_customer_shopping.md05_slice5_order_processing.md
Supporting Documentation
../quick_start_guide.md- Get running in 15 minutes../css_structure_guide.txt- CSS organization../css_quick_reference.txt- CSS usage guide../12.project_readme_final.md- Complete project README
🚀 Getting Started
For Current Development (Slice 1)
- Read
01_slice1_admin_vendor_foundation.md - Follow setup in
../quick_start_guide.md - Complete Slice 1 testing checklist
- Move to Slice 2
For New Features
- Review this overview
- Read the relevant slice documentation
- Follow the implementation pattern
- Test thoroughly before moving forward
💡 Tips for Success
Working with Slices
- ✅ Complete one slice fully before starting the next
- ✅ Test each slice thoroughly
- ✅ Update documentation as you go
- ✅ Commit code after each slice completion
- ✅ Demo each slice to stakeholders
Alpine.js Best Practices
- Keep components small and focused
- Use
x-datafor component state - Use
x-initfor initialization - Prefer
x-showoverx-iffor toggles - Use Alpine directives, not vanilla JS DOM manipulation
Jinja2 Best Practices
- Extend base templates
- Use template inheritance
- Pass initial data from backend
- Keep logic in backend, not templates
- Use filters for formatting
🎯 Success Metrics
By End of Slice 1
- Admin can create vendors ✅
- Vendor owners can log in ⏳
- Vendor context detection works ✅
- Complete data isolation verified
By End of Slice 2
- Vendors can import CSV files
- Import jobs tracked in background
- Product staging area functional
By End of Slice 3
- Products published to catalog
- Inventory management working
- Product customization enabled
By End of Slice 4
- Customers can browse products
- Shopping cart functional
- Customer accounts working
By End of Slice 5
- Complete checkout workflow
- Order management operational
- Platform ready for production
Next Steps: Start with 01_slice1_admin_vendor_foundation.md to continue your current work on Slice 1.