init

web/lib/bills.ts

@@ -0,0 +1,58 @@
+import type { ResultSetHeader, RowDataPacket } from "mysql2/promise";
+import { BILL_BODY_LIMIT } from "./body";
+import { withTransaction, getPool } from "./db";
+import { isUuid } from "./ids";
+
+export class BillStoreError extends Error {
+  readonly status: number;
+
+  constructor(status: number, message: string) {
+    super(message);
+    this.status = status;
+  }
+}
+
+export async function storePublishedBill(token: string, raw: string): Promise<void> {
+  if (!isUuid(token)) throw new BillStoreError(400, "invalid token");
+  if (Buffer.byteLength(raw, "utf8") > BILL_BODY_LIMIT) throw new BillStoreError(413, "body too large");
+  let parsed: unknown;
+  try {
+    parsed = JSON.parse(raw);
+  } catch {
+    throw new BillStoreError(400, "invalid json");
+  }
+  const isSnapshot = parsed !== null && typeof parsed === "object" && !Array.isArray(parsed);
+  await withTransaction(async (conn) => {
+    await conn.query(
+      `INSERT INTO bill_snapshots (token, payload_json, updated_at)
+       VALUES (?, ?, UTC_TIMESTAMP(3))
+       ON DUPLICATE KEY UPDATE payload_json = VALUES(payload_json), updated_at = UTC_TIMESTAMP(3)`,
+      [token, raw],
+    );
+    if (isSnapshot) {
+      await conn.query<ResultSetHeader>(
+        `UPDATE invoices SET snapshot_json = ? WHERE public_token = ? AND deleted_at IS NULL`,
+        [raw, token],
+      );
+    }
+  });
+}
+
+/** Invoice snapshot first, then the legacy store. */
+export async function readBillPayload(token: string): Promise<string | null> {
+  if (!isUuid(token)) return null;
+  const pool = getPool();
+  const [invoices] = await pool.query<RowDataPacket[]>(
+    `SELECT snapshot_json FROM invoices WHERE public_token = ? AND deleted_at IS NULL LIMIT 1`,
+    [token],
+  );
+  const snapshot = invoices[0]?.snapshot_json;
+  if (typeof snapshot === "string" && snapshot.length > 0) return snapshot;
+  const [legacy] = await pool.query<RowDataPacket[]>(
+    `SELECT payload_json FROM bill_snapshots WHERE token = ? LIMIT 1`,
+    [token],
+  );
+  const payload = legacy[0]?.payload_json;
+  if (typeof payload === "string" && payload.length > 0) return payload;
+  return null;
+}