feat : 파티 내용 조회 API를 추가하라

src/main/java/meltingpot/server/domain/entity/Account.java

@@ -1,11 +1,7 @@
 package meltingpot.server.domain.entity;
 
 import jakarta.persistence.*;
-import lombok.AllArgsConstructor;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.Setter;
-import lombok.experimental.SuperBuilder;
+import lombok.*;
 import jakarta.validation.constraints.NotNull;
 import meltingpot.server.domain.entity.common.BaseEntity;
 import org.hibernate.annotations.DynamicInsert;
@@ -18,7 +14,7 @@
 
 @Getter
 @Setter
-@SuperBuilder
+@Builder
 @NoArgsConstructor
 @AllArgsConstructor
 @DynamicInsert

src/main/java/meltingpot/server/domain/entity/party/Party.java

@@ -21,7 +21,7 @@ public class Party extends BaseEntity {
     private int id;
 
     @NotNull
-    @ManyToOne(fetch = FetchType.LAZY)
+    @ManyToOne(fetch = FetchType.EAGER)
     @JoinColumn(name = "party_owner")
     private Account account;
 
@@ -58,5 +58,9 @@ public class Party extends BaseEntity {
     private int partyMinParticipant;
 
     @NotNull
-    private int partMaxParticipant;
+    private int partyMaxParticipant;
+
+    @NotNull
+    @Column(name = "part_max_participant", nullable = false)
+    private Integer partMaxParticipant;
 }

src/main/java/meltingpot/server/domain/repository/PartyRepository.java

@@ -0,0 +1,7 @@
+package meltingpot.server.domain.repository;
+
+import meltingpot.server.domain.entity.party.Party;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PartyRepository extends JpaRepository<Party, Long> {
+}

src/main/java/meltingpot/server/party/controller/PartyController.java

@@ -0,0 +1,39 @@
+package meltingpot.server.party.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+import lombok.RequiredArgsConstructor;
+import meltingpot.server.party.dto.PartyResponse;
+import meltingpot.server.party.service.PartyService;
+import meltingpot.server.util.ResponseCode;
+import meltingpot.server.util.ResponseData;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.NoSuchElementException;
+
+@RestController
+@RequestMapping("/api/v1/party")
+@RequiredArgsConstructor
+public class PartyController {
+    private final PartyService partyService;
+
+    // Todo: 사용자 인증 추가
+    @GetMapping("/{partyId}")
+    @Operation(summary = "파티 정보 조회", description = "파티 ID를 통해 파티 정보를 불러옵니다.")
+    @ApiResponses(value = {
+        @ApiResponse(responseCode = "OK", description = "파티 정보 조회 성공"),
+        @ApiResponse(responseCode = "NOT_FOUND", description = "파티 정보를 찾을 수 없습니다")
+    })
+    public ResponseEntity<ResponseData<PartyResponse>> getParty(@PathVariable Long partyId) {
+        try {
+            return ResponseData.toResponseEntity(ResponseCode.PARTY_FETCH_SUCCESS, partyService.getParty(partyId));
+        } catch (NoSuchElementException e) {
+            return ResponseData.toResponseEntity(ResponseCode.PARTY_NOT_FOUND, null);
+        }
+    }
+}

src/main/java/meltingpot/server/party/dto/PartyResponse.java

@@ -0,0 +1,35 @@
+package meltingpot.server.party.dto;
+
+import lombok.Builder;
+import meltingpot.server.domain.entity.party.Party;
+import meltingpot.server.domain.entity.party.enums.PartyStatus;
+
+@Builder
+public record PartyResponse(
+    int id,
+    String ownerName,
+    String subject,
+    PartyStatus partyStatus,
+    String startTime,
+    String locationAddress,
+    String locationDetail,
+    Boolean locationReserved,
+    Boolean locationCanBeChanged,
+    int minParticipant,
+    int maxParticipant
+) {
+    public static PartyResponse of(Party party) {
+        return PartyResponse.builder().id(party.getId())
+            .ownerName(party.getAccount().getName())
+            .subject(party.getPartySubject())
+            .partyStatus(party.getPartyStatus())
+            .startTime(party.getPartyStartTime().toString())
+            .locationAddress(party.getPartyLocationAddress())
+            .locationDetail(party.getPartyLocationDetail())
+            .locationReserved(party.getPartyLocationReserved())
+            .locationCanBeChanged(party.getPartyLocationCanBeChanged())
+            .minParticipant(party.getPartyMinParticipant())
+            .maxParticipant(party.getPartyMinParticipant())
+            .build();
+    }
+}

src/main/java/meltingpot/server/party/service/PartyService.java

@@ -0,0 +1,19 @@
+package meltingpot.server.party.service;
+
+import lombok.RequiredArgsConstructor;
+import meltingpot.server.domain.repository.PartyRepository;
+import meltingpot.server.party.dto.PartyResponse;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional(readOnly = true)
+@RequiredArgsConstructor
+public class PartyService {
+    private final PartyRepository partyRepository;
+
+    @Transactional
+    public PartyResponse getParty(Long partyId) {
+        return partyRepository.findById(partyId).map(PartyResponse::of).orElseThrow();
+    }
+}

src/main/java/meltingpot/server/util/ResponseCode.java

@@ -13,6 +13,7 @@ public enum ResponseCode {
     SIGNIN_SUCCESS(OK, "로그인 성공"),
     SIGNOUT_SUCCESS(OK, "로그아웃 성공"),
     REISSUE_TOKEN_SUCCESS(OK, "토큰 재발급 성공"),
+    PARTY_FETCH_SUCCESS(OK, "파티 정보 불러오기 성공"),
 
 
     /* 201 CREATED : 요청 성공, 자원 생성 */
@@ -42,6 +43,7 @@ public enum ResponseCode {
     /* 404 NOT_FOUND : Resource 를 찾을 수 없음 */
     ACCOUNT_NOT_FOUND(NOT_FOUND, "계정 정보를 찾을 수 없습니다"),
     REFRESH_TOKEN_NOT_FOUND(NOT_FOUND, "REFRESH 토큰 정보를 찾을 수 없습니다"),
+    PARTY_NOT_FOUND(NOT_FOUND, "파티 정보를 찾을 수 없습니다"),
 
 
     /* 409 CONFLICT : Resource 의 현재 상태와 충돌. 보통 중복된 데이터 존재 */