🔥[FEAT]-#10- 파티 정보 조회 구현

## 개요
파티 정보 조회 구현

src/main/java/com/codingwasabi/trti/domain/memberInParty/repository/MemberInPartyRepository.java

@@ -1,7 +1,9 @@
 package com.codingwasabi.trti.domain.memberInParty.repository;
 
 import com.codingwasabi.trti.domain.memberInParty.model.MemberInParty;
+import com.codingwasabi.trti.domain.party.model.Party;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface MemberInPartyRepository extends JpaRepository<MemberInParty, Long> {
+    Integer countByParty(Party party);
 }

src/main/java/com/codingwasabi/trti/domain/party/PartyAPI.java

@@ -6,4 +6,6 @@
 
 public interface PartyAPI {
     ResponseEntity<?> createParty(MemberAdaptor memberAdaptor, RequestCreatePartyDto requestDto);
+
+    ResponseEntity<?> getPartyInfo(MemberAdaptor memberAdaptor, Long id);
 }

src/main/java/com/codingwasabi/trti/domain/party/PartyService.java

@@ -3,7 +3,10 @@
 import com.codingwasabi.trti.domain.member.model.entity.Member;
 import com.codingwasabi.trti.domain.party.model.request.RequestCreatePartyDto;
 import com.codingwasabi.trti.domain.party.model.response.ResponseCreatePartyDto;
+import com.codingwasabi.trti.domain.party.model.response.ResponsePartyInfoDto;
 
 public interface PartyService {
     ResponseCreatePartyDto create(Member member, RequestCreatePartyDto requestDto);
+
+    ResponsePartyInfoDto getInfo(Member member, Long id);
 }

src/main/java/com/codingwasabi/trti/domain/party/implementation/PartyController.java

@@ -7,10 +7,7 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @RequiredArgsConstructor
@@ -24,4 +21,11 @@ public ResponseEntity<?> createParty(@AuthenticationPrincipal MemberAdaptor memb
                                          @RequestBody RequestCreatePartyDto requestDto) {
         return ResponseEntity.ok(partyService.create(memberAdaptor.getMember(), requestDto));
     }
+
+    @Override
+    @GetMapping("/info")
+    public ResponseEntity<?> getPartyInfo(@AuthenticationPrincipal MemberAdaptor memberAdaptor,
+                                          @RequestParam(name = "id") Long id) {
+        return ResponseEntity.ok(partyService.getInfo(memberAdaptor.getMember(), id));
+    }
 }

src/main/java/com/codingwasabi/trti/domain/party/implementation/PartyServiceImpl.java

@@ -10,6 +10,7 @@
 import com.codingwasabi.trti.domain.party.model.Party;
 import com.codingwasabi.trti.domain.party.model.request.RequestCreatePartyDto;
 import com.codingwasabi.trti.domain.party.model.response.ResponseCreatePartyDto;
+import com.codingwasabi.trti.domain.party.model.response.ResponsePartyInfoDto;
 import com.codingwasabi.trti.domain.party.repository.PartyRepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -39,13 +40,27 @@ public ResponseCreatePartyDto create(Member member, RequestCreatePartyDto reques
         return ResponseCreatePartyDto.from(party);
     }
 
+    @Override
+    @Transactional(readOnly = true)
+    public ResponsePartyInfoDto getInfo(Member member, Long id) {
+        // 현재 로그인한 회원이 조회 권한이 있는지 확인 하는 검증 로직 구현해야함
+
+        // Error code 추가 해야함
+        Party party = partyRepository.findById(id)
+                .orElseThrow(() -> new IllegalArgumentException("[ERROR] 해당 id의 Party는 존재하지 않습니다."));
+        ResponsePartyInfoDto responseDto = ResponsePartyInfoDto.from(party);
+        responseDto.setParticipantsCount( memberInPartyRepository.countByParty(party) );
+
+        return responseDto;
+    }
+
     private void setPartyCaptain(Member member, Party party) {
         party.setCaptain(member);
     }
 
     private void setPartyCity(RequestCreatePartyDto requestDto, Party party) {
         Location.parseName(requestDto.getLocation());
-        party.setLocation(cityRepository
+        party.setCity(cityRepository
                 .findByLocation(Location.parseName(requestDto.getLocation()))
                 .orElseThrow(() -> new IllegalArgumentException("[ERROR] 도시의 정보가 존재하지 않습니다.")));
     }

src/main/java/com/codingwasabi/trti/domain/party/model/response/ResponsePartyInfoDto.java

@@ -0,0 +1,32 @@
+package com.codingwasabi.trti.domain.party.model.response;
+
+import com.codingwasabi.trti.domain.party.model.Party;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Builder
+@AllArgsConstructor
+public class ResponsePartyInfoDto {
+    private Long id;
+    private String title;
+    private String location;
+    @Setter
+    private Integer participantsCount;
+    private String imageUrl;
+    private Boolean isAgreed;
+    private String[] period;
+
+    public static ResponsePartyInfoDto from(Party party) {
+        return ResponsePartyInfoDto.builder()
+                .id(party.getId())
+                .title(party.getTitle())
+                .location(party.getCity().getLocation().getName())
+                .imageUrl(party.getImageLink())
+                .isAgreed(party.isAgreed())
+                .period(party.getPeriod())
+                .build();
+    }
+}