feat: 添加食物识别功能，支持根据图片URL识别食物并转换为饮食记录格式

src/ai-coach/ai-coach.module.ts

@@ -1,4 +1,4 @@
-import { Module } from '@nestjs/common';
+import { Module, forwardRef } from '@nestjs/common';
 import { SequelizeModule } from '@nestjs/sequelize';
 import { ConfigModule } from '@nestjs/config';
 import { AiCoachController } from './ai-coach.controller';
@@ -14,11 +14,12 @@ import { DietRecordsModule } from '../diet-records/diet-records.module';
   imports: [
     ConfigModule,
     UsersModule,
-    DietRecordsModule,
+    forwardRef(() => DietRecordsModule),
     SequelizeModule.forFeature([AiConversation, AiMessage, PostureAssessment]),
   ],
   controllers: [AiCoachController],
   providers: [AiCoachService, DietAnalysisService],
+  exports: [DietAnalysisService],
 })
 export class AiCoachModule { }
 

src/diet-records/diet-records.controller.ts

@@ -15,7 +15,7 @@ import {
 } from '@nestjs/common';
 import { ApiOperation, ApiBody, ApiResponse, ApiTags, ApiQuery } from '@nestjs/swagger';
 import { DietRecordsService } from './diet-records.service';
-import { CreateDietRecordDto, UpdateDietRecordDto, GetDietHistoryQueryDto, DietRecordResponseDto, DietHistoryResponseDto, NutritionSummaryDto } from '../users/dto/diet-record.dto';
+import { CreateDietRecordDto, UpdateDietRecordDto, GetDietHistoryQueryDto, DietRecordResponseDto, DietHistoryResponseDto, NutritionSummaryDto, FoodRecognitionRequestDto, FoodRecognitionResponseDto, FoodRecognitionToDietRecordsResponseDto } from '../users/dto/diet-record.dto';
 import { JwtAuthGuard } from '../common/guards/jwt-auth.guard';
 import { CurrentUser } from '../common/decorators/current-user.decorator';
 import { AccessTokenPayload } from '../users/services/apple-auth.service';
@@ -121,4 +121,44 @@ export class DietRecordsController {
     const count = mealCount ? parseInt(mealCount) : 10;
     return this.dietRecordsService.getRecentNutritionSummary(user.sub, count);
   }
+
+  /**
+   * 根据图片URL识别食物并转换为饮食记录格式
+   */
+  @UseGuards(JwtAuthGuard)
+  @Post('recognize-food-to-records')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: '根据图片URL识别食物并转换为饮食记录格式' })
+  @ApiBody({ type: FoodRecognitionRequestDto })
+  @ApiResponse({ status: 200, description: '成功识别食物并转换为饮食记录格式', type: FoodRecognitionToDietRecordsResponseDto })
+  async recognizeFoodToDietRecords(
+    @Body() requestDto: FoodRecognitionRequestDto,
+    @CurrentUser() user: AccessTokenPayload,
+  ): Promise<FoodRecognitionToDietRecordsResponseDto> {
+    this.logger.log(`识别食物转饮食记录 - 用户ID: ${user.sub}, 图片URL: ${requestDto.imageUrl}`);
+    return this.dietRecordsService.recognizeFoodToDietRecords(
+      requestDto.imageUrl,
+      requestDto.mealType
+    );
+  }
+
+  /**
+   * 根据图片URL识别食物（原始格式）
+   */
+  @UseGuards(JwtAuthGuard)
+  @Post('recognize-food')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: '根据图片URL识别食物' })
+  @ApiBody({ type: FoodRecognitionRequestDto })
+  @ApiResponse({ status: 200, description: '成功识别食物', type: FoodRecognitionResponseDto })
+  async recognizeFood(
+    @Body() requestDto: FoodRecognitionRequestDto,
+    @CurrentUser() user: AccessTokenPayload,
+  ): Promise<FoodRecognitionResponseDto> {
+    this.logger.log(`识别食物 - 用户ID: ${user.sub}, 图片URL: ${requestDto.imageUrl}`);
+    return this.dietRecordsService.recognizeFood(
+      requestDto.imageUrl,
+      requestDto.mealType
+    );
+  }
 }

src/diet-records/diet-records.module.ts

@@ -1,15 +1,17 @@
-import { Module } from '@nestjs/common';
+import { Module, forwardRef } from '@nestjs/common';
 import { SequelizeModule } from '@nestjs/sequelize';
 import { DietRecordsController } from './diet-records.controller';
 import { DietRecordsService } from './diet-records.service';
 import { UserDietHistory } from '../users/models/user-diet-history.model';
 import { ActivityLog } from '../activity-logs/models/activity-log.model';
 import { UsersModule } from '../users/users.module';
+import { AiCoachModule } from '../ai-coach/ai-coach.module';
 
 @Module({
   imports: [
     SequelizeModule.forFeature([UserDietHistory, ActivityLog]),
     UsersModule,
+    forwardRef(() => AiCoachModule),
   ],
   controllers: [DietRecordsController],
   providers: [DietRecordsService],

src/diet-records/diet-records.service.ts

@@ -1,12 +1,13 @@
-import { Injectable, Logger, NotFoundException } from '@nestjs/common';
+import { Injectable, Logger, NotFoundException, Inject, forwardRef } from '@nestjs/common';
 import { InjectModel } from '@nestjs/sequelize';
 import { Op, Transaction } from 'sequelize';
 import { Sequelize } from 'sequelize-typescript';
 import { UserDietHistory } from '../users/models/user-diet-history.model';
 import { ActivityActionType, ActivityEntityType, ActivityLog } from '../activity-logs/models/activity-log.model';
-import { CreateDietRecordDto, UpdateDietRecordDto, GetDietHistoryQueryDto, DietRecordResponseDto, DietHistoryResponseDto, NutritionSummaryDto } from '../users/dto/diet-record.dto';
+import { CreateDietRecordDto, UpdateDietRecordDto, GetDietHistoryQueryDto, DietRecordResponseDto, DietHistoryResponseDto, NutritionSummaryDto, FoodRecognitionRequestDto, FoodRecognitionResponseDto, FoodRecognitionToDietRecordsResponseDto } from '../users/dto/diet-record.dto';
-import { DietRecordSource } from '../users/models/user-diet-history.model';
+import { DietRecordSource, MealType } from '../users/models/user-diet-history.model';
 import { ResponseCode } from '../base.dto';
+import { DietAnalysisService } from '../ai-coach/services/diet-analysis.service';
 
 @Injectable()
 export class DietRecordsService {
@@ -18,6 +19,8 @@ export class DietRecordsService {
     @InjectModel(ActivityLog)
     private readonly activityLogModel: typeof ActivityLog,
     private readonly sequelize: Sequelize,
+    @Inject(forwardRef(() => DietAnalysisService))
+    private readonly dietAnalysisService: DietAnalysisService,
   ) { }
 
   /**
@@ -286,6 +289,89 @@ export class DietRecordsService {
     };
   }
 
+  /**
+   * 根据图片URL识别食物并转换为饮食记录格式
+   * @param imageUrl 图片URL
+   * @param suggestedMealType 建议的餐次类型（可选）
+   * @returns 食物识别结果转换为饮食记录格式
+   */
+  async recognizeFoodToDietRecords(
+    imageUrl: string,
+    suggestedMealType?: MealType
+  ): Promise<FoodRecognitionToDietRecordsResponseDto> {
+    try {
+      this.logger.log(`recognizeFoodToDietRecords - imageUrl: ${imageUrl}, suggestedMealType: ${suggestedMealType}`);
+
+      // 调用 DietAnalysisService 进行食物识别
+      const recognitionResult = await this.dietAnalysisService.recognizeFoodForConfirmation([imageUrl]);
+
+      // 将识别结果转换为 CreateDietRecordDto 格式
+      const dietRecords: CreateDietRecordDto[] = recognitionResult.recognizedItems.map(item => ({
+        mealType: suggestedMealType || item.mealType,
+        foodName: item.foodName,
+        portionDescription: item.portion,
+        estimatedCalories: item.calories,
+        proteinGrams: item.nutritionData.proteinGrams,
+        carbohydrateGrams: item.nutritionData.carbohydrateGrams,
+        fatGrams: item.nutritionData.fatGrams,
+        fiberGrams: item.nutritionData.fiberGrams,
+        source: DietRecordSource.Vision,
+        imageUrl: imageUrl,
+        aiAnalysisResult: {
+          recognitionId: item.id,
+          confidence: recognitionResult.confidence,
+          analysisText: recognitionResult.analysisText,
+          originalLabel: item.label
+        }
+      }));
+
+      return {
+        dietRecords,
+        analysisText: recognitionResult.analysisText,
+        confidence: recognitionResult.confidence,
+        imageUrl: imageUrl
+      };
+    } catch (error) {
+      this.logger.error(`recognizeFoodToDietRecords error: ${error instanceof Error ? error.message : String(error)}`);
+      throw error;
+    }
+  }
+
+  /**
+   * 根据图片URL识别食物（原始格式）
+   * @param imageUrl 图片URL
+   * @param suggestedMealType 建议的餐次类型（可选）
+   * @returns 食物识别结果
+   */
+  async recognizeFood(
+    imageUrl: string,
+    suggestedMealType?: MealType
+  ): Promise<FoodRecognitionResponseDto> {
+    try {
+      this.logger.log(`recognizeFood - imageUrl: ${imageUrl}, suggestedMealType: ${suggestedMealType}`);
+
+      // 调用 DietAnalysisService 进行食物识别
+      const recognitionResult = await this.dietAnalysisService.recognizeFoodForConfirmation([imageUrl]);
+
+      // 如果指定了建议的餐次类型，更新所有识别项的餐次类型
+      if (suggestedMealType) {
+        recognitionResult.recognizedItems.forEach(item => {
+          item.mealType = suggestedMealType;
+        });
+      }
+
+      return {
+        recognizedItems: recognitionResult.recognizedItems,
+        analysisText: recognitionResult.analysisText,
+        confidence: recognitionResult.confidence,
+        imageUrl: imageUrl
+      };
+    } catch (error) {
+      this.logger.error(`recognizeFood error: ${error instanceof Error ? error.message : String(error)}`);
+      throw error;
+    }
+  }
+
   /**
    * 将数据库记录映射为DTO
    */

src/users/dto/diet-record.dto.ts

@@ -375,3 +375,83 @@ export class DietAnalysisResponseDto {
   @ApiProperty({ description: '改善建议' })
   recommendations: string[];
 }
+
+/**
+ * 食物识别请求 DTO
+ */
+export class FoodRecognitionRequestDto {
+  @ApiProperty({ description: '食物图片URL', example: 'https://example.com/food-image.jpg' })
+  @IsString()
+  @IsNotEmpty()
+  imageUrl: string;
+
+  @ApiProperty({ enum: MealType, description: '餐次类型（可选，系统会根据时间自动推断）', required: false })
+  @IsOptional()
+  @IsEnum(MealType)
+  mealType?: MealType;
+}
+
+/**
+ * 食物识别选项
+ */
+export class FoodRecognitionOptionDto {
+  @ApiProperty({ description: '选项ID' })
+  id: string;
+
+  @ApiProperty({ description: '显示标签，如"一碗米饭 150卡"' })
+  label: string;
+
+  @ApiProperty({ description: '食物名称' })
+  foodName: string;
+
+  @ApiProperty({ description: '份量描述' })
+  portion: string;
+
+  @ApiProperty({ description: '估算热量' })
+  calories: number;
+
+  @ApiProperty({ enum: MealType, description: '餐次类型' })
+  mealType: MealType;
+
+  @ApiProperty({ description: '营养数据' })
+  nutritionData: {
+    proteinGrams?: number;
+    carbohydrateGrams?: number;
+    fatGrams?: number;
+    fiberGrams?: number;
+  };
+}
+
+/**
+ * 食物识别响应 DTO
+ */
+export class FoodRecognitionResponseDto {
+  @ApiProperty({ type: [FoodRecognitionOptionDto], description: '识别到的食物选项列表' })
+  recognizedItems: FoodRecognitionOptionDto[];
+
+  @ApiProperty({ description: '分析说明文字' })
+  analysisText: string;
+
+  @ApiProperty({ description: '识别置信度 0-100' })
+  confidence: number;
+
+  @ApiProperty({ description: '原始图片URL' })
+  imageUrl: string;
+}
+
+/**
+ * 食物识别转换为饮食记录的响应 DTO
+ */
+export class FoodRecognitionToDietRecordsResponseDto {
+  @ApiProperty({ type: [CreateDietRecordDto], description: '转换后的饮食记录数据列表' })
+  dietRecords: CreateDietRecordDto[];
+
+  @ApiProperty({ description: '分析说明文字' })
+  analysisText: string;
+
+  @ApiProperty({ description: '识别置信度 0-100' })
+  confidence: number;
+
+  @ApiProperty({ description: '原始图片URL' })
+  imageUrl: string;
+}