feat: 完善对象存储上传与真实条码二维码引擎，彻底剥离保底Mock数据

server/src/core/review/review.service.ts

@@ -0,0 +1,111 @@
+import { OrderStatus } from '../order/order-state-machine';
+
+export interface OrderReviewInput {
+  orderId: string;
+  orderStatus: OrderStatus;
+  expertId: number;
+  userId: number;
+  userNickname: string;
+  rating: number;
+  tags?: string[];
+  content?: string;
+}
+
+export interface ReviewRecord {
+  id: string;
+  orderId: string;
+  expertId: number;
+  userId: number;
+  userNickname: string;
+  rating: number;
+  tags: string[];
+  content: string;
+  createdAt: string;
+}
+
+export interface PostCommentInput {
+  postId: string;
+  userId: number;
+  author: string;
+  content: string;
+}
+
+export interface CommentRecord {
+  id: string;
+  postId: string;
+  userId: number;
+  author: string;
+  content: string;
+  createdAt: string;
+}
+
+export class ReviewAndCommentService {
+  private reviews: ReviewRecord[] = [];
+  private comments: CommentRecord[] = [];
+
+  submitOrderReview(input: OrderReviewInput): ReviewRecord {
+    if (input.orderStatus !== OrderStatus.COMPLETED) {
+      throw new Error('只有已完成(COMPLETED)状态的订单才允许提交服务评价');
+    }
+
+    if (!input.rating || input.rating < 1 || input.rating > 5) {
+      throw new Error('评分必须在 1 至 5 星之间');
+    }
+
+    const exists = this.reviews.some(r => r.orderId === input.orderId);
+    if (exists) {
+      throw new Error('该订单已评价，不可重复提交评价');
+    }
+
+    const review: ReviewRecord = {
+      id: `rev_${Date.now()}_${Math.floor(100 + Math.random() * 900)}`,
+      orderId: input.orderId,
+      expertId: input.expertId,
+      userId: input.userId,
+      userNickname: input.userNickname || '买家用户',
+      rating: Math.floor(input.rating),
+      tags: input.tags || [],
+      content: input.content || '好评！',
+      createdAt: new Date().toISOString()
+    };
+
+    this.reviews.push(review);
+    return review;
+  }
+
+  getReviewsByExpert(expertId: number): ReviewRecord[] {
+    return this.reviews.filter(r => r.expertId === expertId);
+  }
+
+  calculateExpertAverageRating(expertId: number, baseRating: number = 5.0): number {
+    const list = this.getReviewsByExpert(expertId);
+    if (list.length === 0) return baseRating;
+    const total = list.reduce((sum, item) => sum + item.rating, 0);
+    return Number((total / list.length).toFixed(2));
+  }
+
+  submitPostComment(input: PostCommentInput): CommentRecord {
+    if (!input.content || !input.content.trim()) {
+      throw new Error('评论内容不能为空');
+    }
+    if (input.content.trim().length > 500) {
+      throw new Error('评论内容不能超过 500 个字符');
+    }
+
+    const comment: CommentRecord = {
+      id: `cmt_${Date.now()}_${Math.floor(100 + Math.random() * 900)}`,
+      postId: input.postId,
+      userId: input.userId,
+      author: input.author || '热心搭子',
+      content: input.content.trim(),
+      createdAt: new Date().toISOString()
+    };
+
+    this.comments.push(comment);
+    return comment;
+  }
+
+  getCommentsByPost(postId: string): CommentRecord[] {
+    return this.comments.filter(c => c.postId === postId);
+  }
+}