Event-sourced aggregate root handling state transitions from domain events.

Handles POS checkout, product filtering, sale processing, and returns.

Livewire-powered Point of Sale cashier UI with product search, category filtering, cart management, and checkout flow using Alpine.js.

Domain entity representing a customer's basket with basket items; ensures valid ID and non-empty items, and supports replacing all items via Update.

Computes a sale line total as quantity times price using bcmath, optionally subtracting the item discount when include_discount is true.

Product aggregate root with Catalog repository interface for managing saleable items. Supports subclassing for custom product types.

Checks product stock level against threshold returns boolean low-stock flag.

ESC/POS command builder for thermal printers, generating byte sequences for text, font, and formatting.

Comprehensive Sunmi POS printer SDK wrapper supporting text, barcodes, QR codes, bitmaps, cash drawer, LCD display, label printing, and cutter control.

Abstraction for payment methods in the system.

Stock tracking with UniqueInventory (single warehouse) and MultiInventory (multiple warehouses). Automatically updates stock on order completion.

Order aggregate with OrderLine items, ChargeLine discounts/fees, and event-driven lifecycle (Open->Paid->Completed/Canceled).

Generic fallback driver for unrecognized models using standard ESC/POS commands.

Main public API: Printer class factory, connection abstractions, and standard print primitives.

Calculates line-item discount amount from quantity, price, discount value and type (percent or fixed), returning a rounded result.

Reference implementation of the full ESC/POS command set for Epson printers. Covers text, barcodes, QR codes, cut, cash drawer, and character table mapping.

Represents amounts with unit tracking using BigDecimal for precision and Metric for unit metadata. Enables type-safe quantity arithmetic for POS items.

Rails engine initialization and configuration for POS extension.

Generates valid barcode values with checksums for EAN, UPC, ISBN, ISSN, and PZN formats in retail inventory management.

Manages product state via Pinia, exposing reactive data and computed getters.

Observer that auto-generates sale transaction codes ('SELL0001' format), sets default date, associates user, and links to cash drawer.

Returns all rounding mode constants as translated display labels keyed by their values, using reflection and language helper.

Manages cash register operations (open, close, transactions) in the dashboard.

Sale library handling sale processing, registration, and management in CodeIgniter.

Calculates cart sale totals including discounts, taxes, payments, cash rounding, amount due, item count, and units.

Parses configured barcode formats to extract quantity, price, and item identifier from scanned barcode input, updating by reference. Enables flexible POS barcode handling.

Prints sales receipts in multiple formats (large/thermal) with customizable nota types, adaptable for any retail system.

Generates PDF barcodes for products/variants using Barby and Prawn. Lifts out cleanly - just requires barby, prawn, and variant objects with name, options_text, price, and sku.

RAW printing utility for Mini POS thermal receipt printers, handling alignment, barcode, and cut commands.

Manages CRUD operations for product unit quantities, enforcing business rules via exceptions.

Applies inventory changes in batch to Square's inventory system, returning affected counts, applied changes, and any errors.

Retrieves the sales cart from session, initializing it to an empty array if not set. Central accessor for cart state.

Manages product data retrieval, state, pagination, and filtering through HTTP calls for an Angular e-commerce application.

Retrieves tax configuration from a POS Profile including sales taxes template details for point-of-sale invoice processing.

Redux slice managing cart state: addToCart, removeFromCart, clearCart, totals calculation, qty increment/decrement.

Retrieves all open POS opening shift vouchers for a specified user, aggregating payment entries and invoice data for each shift.

Converts unicode/UTF-8 text to ASCII for receipt printers.

Factory method that returns the appropriate barcode encoder instance based on the requested barcode type.

HTML to PDF converter with CSS2.1 support, used for generating receipts and reports in the POS system.

Pinia store managing POS cart state, operations, and async task queuing for sales transactions with stock validation and offline support.

Determines whether an order status is New, used to gate backoffice workflows on newly created orders.

Form request validating purchase cart item addition with product and quantity rules.

Eloquent model representing order line items with price, quantity, and belongsTo relationships to Order and Product.

Sales retrieval and filtering controller providing REST API endpoints for POS systems to query sales records by customer, status, and date range.

Custom exception class for validation errors when allowances are exceeded in POS retail status management.

Manages sales transactions and order processing in a CodeIgniter e-commerce application.

Processes place order commands and persists resulting events.

Broadcasts NFC tag data to connected clients via WebSocket.

Item management operations including search, kit handling, and stock.

Point-of-sale checkout logic: cart, totals, payment handling, and sale completion.