RockInvoiceItems

A ProcessWire module that provides a powerful and flexible invoice item management interface for creating and managing invoice line items.

Features

• Dynamic line item management with add, delete, and clone functionality
• Rich text editing support via TinyMCE integration
• Automatic calculation of subtotals, VAT, and grand totals
• Support for multiple VAT rates
• Sortable invoice items via drag and drop
• Real-time calculation updates
• Clean and intuitive user interface
• Automatic data persistence
• Responsive design that works well on all screen sizes (using overflow scroll)
• Fully translatable (German Translations included via RockLanguage)

Installation

1. Download the module
2. Copy it to your site/modules/ directory
3. Install the module in ProcessWire admin

Usage

The module provides a Fieldtype/Inputfield combo that can be added to any ProcessWire template.

Each line item supports:

• Description (with rich text editing)
• Net amount
• VAT rate
• Quantity
• Automatic total calculation

RockInvoiceItems\Items

The RockInvoiceItems\Items class extends WireArray and provides functionality for managing a collection of invoice items. It handles JSON serialization/deserialization and provides methods for calculating totals and VAT.

Methods

• grandtotal(): Calculates the total amount including VAT
• subtotal(): Calculates the total amount excluding VAT
• vattotal(): Calculates the total VAT amount
• vatArray(): Returns an array of VAT rates and their totals (e.g. ['7.5' => 123, '10' => 1230])