Billie

Example of Domain Driven Design implementation in PHP using Symfony framework.

An invoice is a document issued by a seller (creditor) to the buyer (debtor). It provides details about a sale or services, including the quantities, costs. Factoring is a process where a company (creditor) sells its invoice to a third-party factoring company (Billie). The factoring company then takes care of collecting the money from the debtor. Since there is always the risk that a debtor won’t pay their invoices, Billie sets a debtor limit for each company. This means that Billie won’t accept the invoice if the debtor’s total amount of open invoices reaches the limit.

Bounded Contexts

For simplicity, we will consider two main bounded contexts:

• Invoicing Context - Deals with creating and managing invoices.
• Company Management Context - Handles company-related operations.

Core Domain Models

• Company Attributes: Company ID, Name, Type, Address Methods: UpdateDetails()
• Invoice Attributes: Invoice ID, Debtor ID, Creditor ID, Amount, Issue Date, Due Date, Status Methods: MarkAsPaid()
• Debtor Limit Attributes: Debtor ID, Limit Amount, Current Utilized Amount Methods: UpdateLimit(), CalculateRemainingCredit(), CanAcceptInvoice()

Running the Project

To launch the platform locally, run:

make run

Navigate to http://localhost in your web browser to view the project.