[ST-663] 코인 관련 엔티티 정의 및 API 엔드포인트 추가 (#72)

* ⭐ 유저 내부 코인 엔티티 정의

* 🔨 유저 coin 엔티티 반영

* ⭐ 무료 코인 수령 API

* 🔨 코인 수령 메소드 수정

src/user/entities/user.interface.ts

@@ -4,10 +4,15 @@ export interface UserKey {
 
 export interface User extends UserKey {
   bio?: string;
+  coin: {
+    amount: number;
+    lastReceivedFreeCoinAt: Date;
+  };
   createdAt?: string;
   followers: string[];
   following: string[];
   name: string;
+  participatingChattingRooms: string[];
   profileImage?: string;
   role: string;
   school?: {
@@ -17,5 +22,4 @@ export interface User extends UserKey {
     department?: string;
     grade: number;
   };
-  participatingChattingRooms: string[];
 }

src/user/entities/user.schema.ts

@@ -11,6 +11,17 @@ export const UserSchema = new Schema({
   bio: {
     type: String,
   },
+  coin: {
+    type: Object,
+    schema: {
+      amount: {
+        type: Number,
+      },
+      lastReceivedFreeCoinAt: {
+        type: Date,
+      },
+    },
+  },
   profileImage: {
     type: String,
   },

src/user/user.controller.ts

@@ -157,4 +157,11 @@ export class UserController {
       setFCMTokenUserDto.fcmToken,
     );
   }
+
+  @ApiTags('User')
+  @ApiBearerAuth('Authorization')
+  @Get('user/receiveFreeCoin')
+  receiveFreeCoin(@Headers() headers: Headers) {
+    return this.userService.receiveFreeCoin(AccessToken.userId(headers));
+  }
 }

src/user/user.repository.ts

@@ -16,7 +16,10 @@ export class UserRepository {
   async create(userId: string, createUserDto: CreateUserDto, role: string) {
     const user: User = {
       bio: createUserDto.bio,
-      createdAt: new Date().toISOString(),
+      coin: {
+        amount: 0,
+        lastReceivedFreeCoinAt: new Date(0),
+      },
       followers: [],
       following: [],
       id: userId,
@@ -276,4 +279,24 @@ export class UserRepository {
         });
       });
   }
+
+  async receiveFreeCoin(userId: string) {
+    const user: User = await this.get(userId);
+    if (user === undefined) {
+      throw new Error('사용자를 찾을 수 없습니다.');
+    }
+
+    const now = new Date();
+    if (now.valueOf() - user.coin.lastReceivedFreeCoinAt.valueOf() < 86400000) {
+      throw new Error('이미 무료 코인을 받았습니다.');
+    }
+
+    try {
+      user.coin.amount += 2;
+      user.coin.lastReceivedFreeCoinAt = now;
+      await this.userModel.update({ id: userId }, { coin: user.coin });
+    } catch (error) {
+      throw new Error('무료 코인을 받을 수 없습니다.');
+    }
+  }
 }

src/user/user.service.ts

@@ -308,4 +308,13 @@ export class UserService {
       return new Fail(error.message);
     }
   }
+
+  async receiveFreeCoin(userId: string) {
+    try {
+      await this.userRepository.receiveFreeCoin(userId);
+      return new Success('성공적으로 무료 코인을 지급받았습니다.');
+    } catch (error) {
+      return new Fail(error.message);
+    }
+  }
 }