[BE#200]이미지 유해성 검사 기능 추가

- clova greeneye api를 활용한 이미지 유해성 검사

BE/package.json

@@ -39,6 +39,7 @@
     "reflect-metadata": "^0.1.13",
     "rxjs": "^7.8.1",
     "typeorm": "^0.3.17",
+    "uuid": "^9.0.1",
     "winston": "^3.11.0"
   },
   "devDependencies": {

BE/src/users/interface/greeneye.interface.ts

@@ -0,0 +1,19 @@
+export interface GreenEyeResponse {
+  version: string;
+  requestId: string;
+  timestamp: number;
+  images: [
+    {
+      message: string;
+      name: string;
+      result: {
+        adult: { confidence: number };
+        normal: { confidence: number };
+        porn: { confidence: number };
+        sexy: { confidence: number };
+      };
+      latency: number;
+      confidence: number;
+    },
+  ];
+}

BE/src/users/users.service.ts

@@ -4,12 +4,16 @@ import { Repository } from 'typeorm';
 import { UsersModel } from './entity/users.entity';
 import { CreateUserDto } from './dto/create-user.dto';
 import { UpdateUserDto } from './dto/update-user.dto';
+import { ConfigService } from '@nestjs/config';
+import { v4 } from 'uuid';
+import { GreenEyeResponse } from './interface/greeneye.interface';
 
 @Injectable()
 export class UsersService {
   constructor(
     @InjectRepository(UsersModel)
     private usersRepository: Repository<UsersModel>,
+    private config: ConfigService,
   ) {}
 
   async createUser(user: CreateUserDto): Promise<UsersModel> {
@@ -62,4 +66,48 @@ export class UsersService {
 
     return selectedUser;
   }
+
+  async isNormalImage(image_url: string): Promise<boolean> {
+    const THRESHOLD = 0.5;
+    const response = await this.requestClovaGreenEye(image_url);
+    const result = response.images[0].result;
+    const message = response.images[0].message;
+    if (message !== 'SUCCESS') {
+      throw new BadRequestException('이미지 인식 실패');
+    }
+    const normalScore = result.normal.confidence;
+    const isNormal = normalScore > THRESHOLD ? true : false;
+
+    return isNormal;
+  }
+
+  async requestClovaGreenEye(image_url: string): Promise<GreenEyeResponse> {
+    const APIURL = this.config.get<string>('GREENEYE_URL');
+    const CLIENT_SECRET = this.config.get<string>('GREENEYE_SECRET');
+    const UUID = v4();
+    try {
+      const response = await fetch(APIURL, {
+        method: 'POST',
+        headers: {
+          'X-GREEN-EYE-SECRET': CLIENT_SECRET,
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          version: 'V1',
+          requestId: UUID,
+          timestamp: Date.now(),
+          images: [
+            {
+              name: `${UUID}_profile`,
+              url: image_url,
+            },
+          ],
+        }),
+      });
+
+      return response.json();
+    } catch (error) {
+      throw new BadRequestException('이미지 검사 요청 실패');
+    }
+  }
 }