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Implement product multi-buys and variants system

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Major restructuring of product variations:
- Renamed ProductVariation to ProductMultiBuy for quantity-based pricing (e.g., "3 for £25")
- Added new ProductVariant model for string-based options (colors, flavors)
- Complete separation of multi-buy pricing from variant selection

Features implemented:
- Multi-buy deals with automatic price-per-unit calculation
- Product variants for colors/flavors/sizes with stock tracking
- TeleBot checkout supports both multi-buys and variant selection
- Shopping cart correctly calculates multi-buy bundle prices
- Order system tracks selected variants and multi-buy choices
- Real-time bot activity monitoring with SignalR
- Public bot directory page with QR codes for Telegram launch
- Admin dashboard shows multi-buy and variant metrics

Technical changes:
- Updated all DTOs, services, and controllers
- Fixed cart total calculation for multi-buy bundles
- Comprehensive test coverage for new functionality
- All existing tests passing with new features

Database changes:
- Migrated ProductVariations to ProductMultiBuys
- Added ProductVariants table
- Updated OrderItems to track variants

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
SysAdmin
2025-09-21 00:30:12 +01:00
parent 7683b7dfe5
commit 034b8facee
46 changed files with 3190 additions and 332 deletions
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32
LittleShop/Services/OrderService.cs
View File

@@ -30,7 +30,7 @@ public class OrderService : IOrderService
.Include(o => o.Items)
.ThenInclude(oi => oi.Product)
.Include(o => o.Items)
.ThenInclude(oi => oi.ProductVariation)
.ThenInclude(oi => oi.ProductMultiBuy)
.Include(o => o.Payments)
.OrderByDescending(o => o.CreatedAt)
.ToListAsync();
@@ -45,7 +45,7 @@ public class OrderService : IOrderService
.Include(o => o.Items)
.ThenInclude(oi => oi.Product)
.Include(o => o.Items)
.ThenInclude(oi => oi.ProductVariation)
.ThenInclude(oi => oi.ProductMultiBuy)
.Include(o => o.Payments)
.Where(o => o.IdentityReference == identityReference)
.OrderByDescending(o => o.CreatedAt)
@@ -61,7 +61,7 @@ public class OrderService : IOrderService
.Include(o => o.Items)
.ThenInclude(oi => oi.Product)
.Include(o => o.Items)
.ThenInclude(oi => oi.ProductVariation)
.ThenInclude(oi => oi.ProductMultiBuy)
.Include(o => o.Payments)
.Where(o => o.CustomerId == customerId)
.OrderByDescending(o => o.CreatedAt)
@@ -77,7 +77,7 @@ public class OrderService : IOrderService
.Include(o => o.Items)
.ThenInclude(oi => oi.Product)
.Include(o => o.Items)
.ThenInclude(oi => oi.ProductVariation)
.ThenInclude(oi => oi.ProductMultiBuy)
.Include(o => o.Payments)
.FirstOrDefaultAsync(o => o.Id == id);
@@ -146,20 +146,20 @@ public class OrderService : IOrderService
throw new ArgumentException($"Product {itemDto.ProductId} not found or inactive");
}
ProductVariation? variation = null;
ProductMultiBuy? multiBuy = null;
decimal unitPrice = product.Price;
if (itemDto.ProductVariationId.HasValue)
if (itemDto.ProductMultiBuyId.HasValue)
{
variation = await _context.ProductVariations.FindAsync(itemDto.ProductVariationId.Value);
if (variation == null || !variation.IsActive || variation.ProductId != itemDto.ProductId)
multiBuy = await _context.ProductMultiBuys.FindAsync(itemDto.ProductMultiBuyId.Value);
if (multiBuy == null || !multiBuy.IsActive || multiBuy.ProductId != itemDto.ProductId)
{
throw new ArgumentException($"Product variation {itemDto.ProductVariationId} not found, inactive, or doesn't belong to product {itemDto.ProductId}");
throw new ArgumentException($"Product multi-buy {itemDto.ProductMultiBuyId} not found, inactive, or doesn't belong to product {itemDto.ProductId}");
}
// When using a variation, the quantity represents how many of that variation bundle
// For example: buying 2 of the "3 for £25" variation means 6 total items for £50
unitPrice = variation.Price;
// When using a multi-buy, the quantity represents how many of that multi-buy bundle
// For example: buying 2 of the "3 for £25" multi-buy means 6 total items for £50
unitPrice = multiBuy.Price;
}
var orderItem = new OrderItem
@@ -167,7 +167,7 @@ public class OrderService : IOrderService
Id = Guid.NewGuid(),
OrderId = order.Id,
ProductId = itemDto.ProductId,
ProductVariationId = itemDto.ProductVariationId,
ProductMultiBuyId = itemDto.ProductMultiBuyId,
Quantity = itemDto.Quantity,
UnitPrice = unitPrice,
TotalPrice = unitPrice * itemDto.Quantity
@@ -321,9 +321,9 @@ public class OrderService : IOrderService
{
Id = oi.Id,
ProductId = oi.ProductId,
ProductVariationId = oi.ProductVariationId,
ProductMultiBuyId = oi.ProductMultiBuyId,
ProductName = oi.Product.Name,
ProductVariationName = oi.ProductVariation?.Name,
ProductMultiBuyName = oi.ProductMultiBuy?.Name,
Quantity = oi.Quantity,
UnitPrice = oi.UnitPrice,
TotalPrice = oi.TotalPrice
@@ -500,7 +500,7 @@ public class OrderService : IOrderService
.Include(o => o.Items)
.ThenInclude(oi => oi.Product)
.Include(o => o.Items)
.ThenInclude(oi => oi.ProductVariation)
.ThenInclude(oi => oi.ProductMultiBuy)
.Include(o => o.Payments)
.Where(o => o.Status == status)
.OrderByDescending(o => o.CreatedAt)