From 940468f23bffb946f047f33547495ed30637d2a6 Mon Sep 17 00:00:00 2001
From: Astrian Zheng <happy.wheel6743@astrian.moe>
Date: Sun, 12 Jan 2025 12:43:19 +1100
Subject: [PATCH] feat: add endpoint for retrieving paginated invoices with
 bearer token validation

---
 backend/src/app.ts              | 22 +++++++++++++++++++
 backend/src/func/getInvoices.ts | 38 +++++++++++++++++++++++++++++++++
 backend/src/func/index.ts       |  4 +++-
 3 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 backend/src/func/getInvoices.ts

diff --git a/backend/src/app.ts b/backend/src/app.ts
index 219bab5..228a6e7 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -160,6 +160,28 @@ app.use(route.get('/invoice/INV-:date(\\d{8})-:suffix(\\d+)', async (ctx, invoic
 	ctx.body = invoice.exportJSON()
 }))
 
+app.use(route.get('/invoice', async (ctx) => {
+	// 请求头验证 bearer token
+	const bearerToken = ctx.request.headers['authorization']?.split(' ')
+	if (!bearerToken) throw new HttpError(ErrorDescEnum.unauthorized, 401)
+	if (bearerToken[0] !== 'Bearer') throw new HttpError(ErrorDescEnum.unauthorized, 401)
+	if (!bearerToken[1]) throw new HttpError(ErrorDescEnum.unauthorized, 401)
+	await func.verifyBearerToken(bearerToken[1])
+
+	// 获取 pager 和 limit
+	const pageQuery = ctx.request.query.page
+	if (Array.isArray(pageQuery)) throw new HttpError(ErrorDescEnum.invalid_field_format, 400, ['page'])
+	const page = pageQuery ? parseInt(pageQuery) : 1
+	const limitQuery = ctx.request.query.limit
+	if (Array.isArray(limitQuery)) throw new HttpError(ErrorDescEnum.invalid_field_format, 400, ['limit'])
+	const limit = limitQuery ? parseInt(limitQuery) : 10
+	if (page <= 0 || limit < 5) throw new HttpError(ErrorDescEnum.invalid_field_format, 400, ['page', 'limit'])
+
+	// 获取收据
+	const invoices = await func.getInvoices(ctx.prisma, page, limit)
+	ctx.body = await Promise.all(invoices.map(async invoice => (await invoice).exportJSON()))
+}))
+
 const port = parseInt(process.env.PORT ?? '3000')
 app.listen(port, () => {
 	console.log(`Server is running at http://localhost:${port}`)
diff --git a/backend/src/func/getInvoices.ts b/backend/src/func/getInvoices.ts
new file mode 100644
index 0000000..f426202
--- /dev/null
+++ b/backend/src/func/getInvoices.ts
@@ -0,0 +1,38 @@
+import { PrismaClient } from '@prisma/client'
+import Invoice from '../classes/Invoice'
+import InvoiceItem from '../classes/InvoiceItem'
+
+export default async function getInvoices(prisma: PrismaClient, page: number, limit: number) {
+	const invoices = await prisma.invoice.findMany({
+		skip: (page - 1) * limit,
+		take: limit,
+		orderBy: [{
+			invoice_date: 'desc'
+		}, {
+			invoice_suffix_code: 'desc'
+		}]
+	})
+
+	const result = invoices.map(async invoice => {
+		const invoiceItemsRaw = await prisma.invoiceItem.findMany({
+			where: {
+				invoice_suffix_code: invoice.invoice_suffix_code,
+				invoice_date: invoice.invoice_date
+			}
+		})
+
+		const invoiceItems = invoiceItemsRaw.map(item => {
+			return new InvoiceItem(item.item_id, item.item_description, item.item_quantity, item.item_unit, item.item_unit_price)
+		})
+
+		const payer = {
+			id: invoice.payer_id,
+			name: invoice.invoice_payer_name,
+			address: invoice.invoice_payer_address,
+			abn: invoice.invoice_payer_abn ?? undefined
+		}
+		return new Invoice(invoice.invoice_suffix_code, invoice.invoice_date, [invoice.invoice_billing_period_start, invoice.invoice_billing_period_end], invoiceItems, invoice.invoice_due_date, payer)
+	})
+
+	return result
+}
\ No newline at end of file
diff --git a/backend/src/func/index.ts b/backend/src/func/index.ts
index bde06ae..3e7b85a 100644
--- a/backend/src/func/index.ts
+++ b/backend/src/func/index.ts
@@ -2,10 +2,12 @@ import createPayer from "./createPayer"
 import issueInvoice from "./issueInvoice"
 import verifyBearerToken from "./verifyBearerToken"
 import getSpecificInvoice from "./getSpecificInvoice"
+import getInvoices from "./getInvoices"
 
 export default {
 	createPayer,
 	issueInvoice,
 	verifyBearerToken,
-	getSpecificInvoice
+	getSpecificInvoice,
+	getInvoices,
 }
\ No newline at end of file