feat(M01-B): 严格转换旧库订单金额

backend/src/db/legacy-money.ts

@@ -0,0 +1,56 @@
+export const MYSQL_UNSIGNED_INT_MAX = 4_294_967_295;
+
+export interface LegacyMoneyOptions {
+  nullable?: boolean;
+  maxCents?: number;
+  field?: string;
+}
+
+function describeField(field: string | undefined): string {
+  return field ? ` for ${field}` : '';
+}
+
+export function legacyDecimalToCents(
+  value: unknown,
+  options: LegacyMoneyOptions = {}
+): number | null {
+  const field = describeField(options.field);
+
+  if (value === null || value === undefined) {
+    if (options.nullable) {
+      return null;
+    }
+    throw new Error(`Legacy money value${field} cannot be null.`);
+  }
+
+  if (typeof value !== 'string' && typeof value !== 'number') {
+    throw new Error(`Legacy money value${field} must be a decimal string or number.`);
+  }
+
+  if (typeof value === 'number' && !Number.isFinite(value)) {
+    throw new Error(`Legacy money value${field} must be finite.`);
+  }
+
+  const decimal = String(value);
+  const match = /^(\d+)(?:\.(\d{1,2}))?$/.exec(decimal);
+  if (!match) {
+    throw new Error(
+      `Legacy money value${field} must be a non-negative decimal with at most two fractional digits.`
+    );
+  }
+
+  const wholeCents = BigInt(match[1]) * 100n;
+  const fraction = (match[2] ?? '').padEnd(2, '0');
+  const cents = wholeCents + BigInt(fraction || '0');
+  const maxCents = options.maxCents ?? MYSQL_UNSIGNED_INT_MAX;
+
+  if (!Number.isSafeInteger(maxCents) || maxCents < 0) {
+    throw new Error('Legacy money maxCents must be a non-negative safe integer.');
+  }
+
+  if (cents > BigInt(maxCents)) {
+    throw new Error(`Legacy money value${field} exceeds the target cents column limit.`);
+  }
+
+  return Number(cents);
+}

backend/src/db/legacy-read-repository.ts

@@ -1,4 +1,5 @@
 import type { MySqlPool } from './mysql.js';
+import { legacyDecimalToCents } from './legacy-money.js';
 
 type LegacyEntity = 'stores' | 'rooms' | 'orders' | 'devices';
 
@@ -12,6 +13,11 @@ export interface LegacyTableMapping {
   codeColumn?: string;
   startColumn?: string;
   endColumn?: string;
+  totalAmountColumn?: string;
+  paidAmountColumn?: string;
+  renewalAmountColumn?: string;
+  groupAmountColumn?: string;
+  refundAmountColumn?: string;
 }
 
 export interface LegacyReadOptions {
@@ -29,6 +35,11 @@ export interface LegacyRecord {
   status: string | null;
   startAt: Date | string | null;
   endAt: Date | string | null;
+  totalAmountCents: number | null;
+  paidAmountCents: number | null;
+  renewalAmountCents: number | null;
+  groupAmountCents: number | null;
+  refundAmountCents: number | null;
 }
 
 export const defaultLegacyMappings: Record<LegacyEntity, LegacyTableMapping> = {
@@ -56,7 +67,12 @@ export const defaultLegacyMappings: Record<LegacyEntity, LegacyTableMapping> = {
     codeColumn: 'order_no',
     statusColumn: 'status',
     startColumn: 'start_time',
-    endColumn: 'end_time'
+    endColumn: 'end_time',
+    totalAmountColumn: 'price',
+    paidAmountColumn: 'pay_price',
+    renewalAmountColumn: 'renew_price',
+    groupAmountColumn: 'group_pay_price',
+    refundAmountColumn: 'refund_price'
   },
   devices: {
     table: 'member_device_info',
@@ -89,6 +105,81 @@ function normalizeLimit(limit = 100): number {
   return limit;
 }
 
+interface LegacyQueryRow extends Omit<
+  LegacyRecord,
+  | 'totalAmountCents'
+  | 'paidAmountCents'
+  | 'renewalAmountCents'
+  | 'groupAmountCents'
+  | 'refundAmountCents'
+> {
+  totalAmountDecimal: unknown;
+  paidAmountDecimal: unknown;
+  renewalAmountDecimal: unknown;
+  groupAmountDecimal: unknown;
+  refundAmountDecimal: unknown;
+}
+
+function normalizeMoney(
+  value: unknown,
+  mapping: LegacyTableMapping,
+  column: string | undefined,
+  nullable: boolean
+): number | null {
+  if (!column) {
+    return null;
+  }
+  return legacyDecimalToCents(value, {
+    field: `${mapping.table}.${column}`,
+    nullable
+  });
+}
+
+function normalizeRecord(row: LegacyQueryRow, mapping: LegacyTableMapping): LegacyRecord {
+  const {
+    totalAmountDecimal,
+    paidAmountDecimal,
+    renewalAmountDecimal,
+    groupAmountDecimal,
+    refundAmountDecimal,
+    ...record
+  } = row;
+
+  return {
+    ...record,
+    totalAmountCents: normalizeMoney(
+      totalAmountDecimal,
+      mapping,
+      mapping.totalAmountColumn,
+      false
+    ),
+    paidAmountCents: normalizeMoney(
+      paidAmountDecimal,
+      mapping,
+      mapping.paidAmountColumn,
+      true
+    ),
+    renewalAmountCents: normalizeMoney(
+      renewalAmountDecimal,
+      mapping,
+      mapping.renewalAmountColumn,
+      true
+    ),
+    groupAmountCents: normalizeMoney(
+      groupAmountDecimal,
+      mapping,
+      mapping.groupAmountColumn,
+      true
+    ),
+    refundAmountCents: normalizeMoney(
+      refundAmountDecimal,
+      mapping,
+      mapping.refundAmountColumn,
+      true
+    )
+  };
+}
+
 export class LegacyReadRepository {
   constructor(
     private readonly pool: Pick<MySqlPool, 'query'>,
@@ -132,7 +223,12 @@ export class LegacyReadRepository {
       `${selectedColumn(mapping.codeColumn, 'code')},`,
       `${selectedColumn(mapping.statusColumn, 'status')},`,
       `${selectedColumn(mapping.startColumn, 'startAt')},`,
-      selectedColumn(mapping.endColumn, 'endAt'),
+      `${selectedColumn(mapping.endColumn, 'endAt')},`,
+      `${selectedColumn(mapping.totalAmountColumn, 'totalAmountDecimal')},`,
+      `${selectedColumn(mapping.paidAmountColumn, 'paidAmountDecimal')},`,
+      `${selectedColumn(mapping.renewalAmountColumn, 'renewalAmountDecimal')},`,
+      `${selectedColumn(mapping.groupAmountColumn, 'groupAmountDecimal')},`,
+      selectedColumn(mapping.refundAmountColumn, 'refundAmountDecimal'),
       `FROM ${quoteIdentifier(mapping.table)}`,
       `WHERE ${clauses.join(' AND ')}`,
       `ORDER BY ${quoteIdentifier(mapping.idColumn)} ASC`,
@@ -140,6 +236,6 @@ export class LegacyReadRepository {
     ].join(' ');
 
     const [rows] = await this.pool.query(sql, parameters);
-    return rows as LegacyRecord[];
+    return (rows as LegacyQueryRow[]).map((row) => normalizeRecord(row, mapping));
   }
 }