feat: 添加投标信息按日期范围更新功能及AI推荐持久化

添加按日期范围更新投标信息的功能，支持日期范围选择和数据更新
实现AI推荐结果的持久化存储和加载功能
优化日期范围选择器的本地存储功能

src/ai/ai.controller.ts

@@ -1,5 +1,5 @@
-import { Controller, Post, Body } from '@nestjs/common';
-import { AiService } from './ai.service';
+import { Controller, Post, Body, Get } from '@nestjs/common';
+import { AiService, AIRecommendation } from './ai.service';
 
 export class BidDataDto {
   title: string;
@@ -9,6 +9,10 @@ export class BidsRequestDto {
   bids: BidDataDto[];
 }
 
+export class SaveRecommendationsDto {
+  recommendations: AIRecommendation[];
+}
+
 @Controller('api/ai')
 export class AiController {
   constructor(private readonly aiService: AiService) {}
@@ -17,4 +21,15 @@ export class AiController {
   async getRecommendations(@Body() request: BidsRequestDto) {
     return this.aiService.getRecommendations(request.bids);
   }
+
+  @Post('save-recommendations')
+  async saveRecommendations(@Body() request: SaveRecommendationsDto) {
+    await this.aiService.saveRecommendations(request.recommendations);
+    return { success: true };
+  }
+
+  @Get('latest-recommendations')
+  async getLatestRecommendations() {
+    return this.aiService.getLatestRecommendations();
+  }
 }

src/ai/ai.module.ts

@@ -1,10 +1,16 @@
 import { Module } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
 import { AiController } from './ai.controller';
 import { AiService } from './ai.service';
+import { AiRecommendation } from './entities/ai-recommendation.entity';
+import { BidItem } from '../bids/entities/bid-item.entity';
 
 @Module({
-  imports: [ConfigModule],
+  imports: [
+    ConfigModule,
+    TypeOrmModule.forFeature([AiRecommendation, BidItem]),
+  ],
   controllers: [AiController],
   providers: [AiService],
   exports: [AiService],

src/ai/ai.service.ts

@@ -1,7 +1,11 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
 import OpenAI from 'openai';
 import { PromptString } from './Prompt';
+import { AiRecommendation as AiRecommendationEntity } from './entities/ai-recommendation.entity';
+import { BidItem } from '../bids/entities/bid-item.entity';
 
 export interface BidDataDto {
   title: string;
@@ -19,7 +23,13 @@ export class AiService {
   private readonly logger = new Logger(AiService.name);
   private openai: OpenAI;
 
-  constructor(private readonly configService: ConfigService) {
+  constructor(
+    private readonly configService: ConfigService,
+    @InjectRepository(AiRecommendationEntity)
+    private readonly aiRecommendationRepository: Repository<AiRecommendationEntity>,
+    @InjectRepository(BidItem)
+    private readonly bidItemRepository: Repository<BidItem>,
+  ) {
     const apiKey = this.configService.get<string>('ARK_API_KEY');
     this.openai = new OpenAI({
       apiKey: apiKey || '',
@@ -80,4 +90,57 @@ ${JSON.stringify(bids.map(b => b.title), null, 2)}`;
       throw error;
     }
   }
+
+  async saveRecommendations(recommendations: AIRecommendation[]): Promise<void> {
+    this.logger.log('开始保存 AI 推荐结果');
+
+    try {
+      // 删除所有旧的推荐
+      await this.aiRecommendationRepository.clear();
+
+      // 保存新的推荐结果（只保存 title 和 confidence）
+      const entities = recommendations.map(rec => {
+        const entity = new AiRecommendationEntity();
+        entity.title = rec.title;
+        entity.confidence = rec.confidence;
+        return entity;
+      });
+
+      await this.aiRecommendationRepository.save(entities);
+      this.logger.log(`成功保存 ${entities.length} 条 AI 推荐结果`);
+    } catch (error) {
+      this.logger.error('保存 AI 推荐失败:', error);
+      throw error;
+    }
+  }
+
+  async getLatestRecommendations(): Promise<AIRecommendation[]> {
+    this.logger.log('获取最新的 AI 推荐结果');
+
+    try {
+      const entities = await this.aiRecommendationRepository.find({
+        order: { confidence: 'DESC' }
+      });
+
+      // 从 bid-items 表获取 url 和 source
+      const result: AIRecommendation[] = [];
+      for (const entity of entities) {
+        const bidItem = await this.bidItemRepository.findOne({
+          where: { title: entity.title }
+        });
+
+        result.push({
+          title: entity.title,
+          url: bidItem?.url || '',
+          source: bidItem?.source || '',
+          confidence: entity.confidence
+        });
+      }
+
+      return result;
+    } catch (error) {
+      this.logger.error('获取最新 AI 推荐失败:', error);
+      throw error;
+    }
+  }
 }

src/ai/entities/ai-recommendation.entity.ts

@@ -0,0 +1,16 @@
+import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn } from 'typeorm';
+
+@Entity('ai_recommendations')
+export class AiRecommendation {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column()
+  title: string;
+
+  @Column({ type: 'int' })
+  confidence: number;
+
+  @CreateDateColumn()
+  createdAt: Date;
+}