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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
lib/modules/billing/web/credit_note_print.ex
defmodule PhoenixKit.Modules.Billing.Web.CreditNotePrint do
@moduledoc """
Printable credit note view - displays refund/credit note in a print-friendly format.
This page is designed to be printed or saved as PDF directly from the browser.
Credit notes are generated for refund transactions.
IMPORTANT: In a credit note, the roles are reversed compared to invoice:
- The company (seller) is now the PAYER (issuing the refund)
- The customer is now the PAYEE (receiving the refund)
"""
use PhoenixKitWeb, :live_view
alias PhoenixKit.Modules.Billing
alias PhoenixKit.Modules.Billing.CountryData
alias PhoenixKit.Modules.Billing.Transaction
alias PhoenixKit.Settings
alias PhoenixKit.Utils.Routes
@impl true
def mount(%{"id" => invoice_id, "transaction_id" => transaction_id}, _session, socket) do
with true <- Billing.enabled?(),
%{} = invoice <- Billing.get_invoice(invoice_id, preload: [:user, :order]),
%Transaction{} = transaction <- Billing.get_transaction(transaction_id),
true <- Transaction.refund?(transaction) do
mount_credit_note(socket, invoice, transaction)
else
false ->
{:ok,
socket
|> put_flash(:error, "Billing module is not enabled")
|> push_navigate(to: Routes.path("/admin"))}
nil ->
error_msg =
if Billing.get_invoice(invoice_id) == nil,
do: "Invoice not found",
else: "Transaction not found"
redirect_path =
if Billing.get_invoice(invoice_id) == nil,
do: Routes.path("/admin/billing/invoices"),
else: Routes.path("/admin/billing/invoices/#{invoice_id}")
{:ok,
socket
|> put_flash(:error, error_msg)
|> push_navigate(to: redirect_path)}
%Transaction{} ->
{:ok,
socket
|> put_flash(:error, "Transaction is not a refund")
|> push_navigate(to: Routes.path("/admin/billing/invoices/#{invoice_id}"))}
end
end
defp mount_credit_note(socket, invoice, transaction) do
project_title = Settings.get_setting("project_title", "PhoenixKit")
company_info = get_company_info()
credit_note_number = generate_credit_note_number(transaction)
socket =
socket
|> assign(:page_title, "Credit Note #{credit_note_number}")
|> assign(:project_title, project_title)
|> assign(:invoice, invoice)
|> assign(:transaction, transaction)
|> assign(:credit_note_number, credit_note_number)
|> assign(:company, company_info)
{:ok, socket, layout: false}
end
@impl true
def handle_params(_params, _url, socket) do
{:noreply, socket}
end
defp get_company_info do
%{
name: Settings.get_setting("billing_company_name", ""),
address: CountryData.format_company_address(),
vat: Settings.get_setting("billing_company_vat", ""),
bank_name: Settings.get_setting("billing_bank_name", ""),
bank_iban: Settings.get_setting("billing_bank_iban", ""),
bank_swift: Settings.get_setting("billing_bank_swift", "")
}
end
defp generate_credit_note_number(transaction) do
prefix = Settings.get_setting("billing_credit_note_prefix", "CN")
# Use transaction number suffix for credit note
suffix = transaction.transaction_number |> String.replace(~r/^TXN-/, "")
"#{prefix}-#{suffix}"
end
end