feat : add new endpoint for global contests info

Author: Rajat069

src/main/java/com/rajat_singh/leetcode_api/client/LeetCodeClient.java

@@ -21,6 +21,7 @@
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import static com.rajat_singh.leetcode_api.graphql.GraphQlQueries.*;
@@ -284,4 +285,53 @@ public DailyCodingChallengeResponse fetchDailyCodingChallengeQuestions() {
         return restTemplate.postForObject(leetcodeApiUrl,entity,DailyCodingChallengeResponse.class);
     }
 
+    @RateLimiter(name = "leetcode-api")
+    public List<ContestsDTO.ContestData> fetchAllPastContest() {
+
+        int pageNo = 1;
+        int numPerPage = 10;
+
+        List<ContestsDTO.ContestData> combined = new ArrayList<>();
+
+        while (true) {
+            ContestsDTO response = fetchPage(pageNo, numPerPage);
+
+            Logger.info("Fetched page {} of past contests", pageNo);
+
+            if (response == null || response.getData() == null) break;
+
+            List<ContestsDTO.ContestData> pageData = response.getData().getPastContests().getData();
+
+            if (pageData == null || pageData.isEmpty()) break;
+
+            combined.addAll(pageData);
+
+            int current = response.getData().getPastContests().getCurrentPage();
+            int total = response.getData().getPastContests().getPageNum();
+
+            if (current >= total) break;
+
+            pageNo++;
+        }
+
+        return combined;
+    }
+
+    public ContestsDTO fetchPage(int pageNo, int numPerPage) {
+
+        HttpHeaders headers = new HttpHeaders();
+        setHeader(headers);
+
+        Map<String, Object> requestBody = new HashMap<>();
+        requestBody.put("query", FETCH_ALL_PAST_CONTESTS);
+        requestBody.put("operationName", "pastContests");
+        requestBody.put("variables", Map.of("pageNo", pageNo, "numPerPage", numPerPage));
+
+        HttpEntity<Map<String, Object>> entity = new HttpEntity<>(requestBody, headers);
+
+        return restTemplate.postForObject(leetcodeApiUrl, entity, ContestsDTO.class);
+    }
+
+
+
 }

src/main/java/com/rajat_singh/leetcode_api/constants/Constants.java

@@ -5,6 +5,8 @@ public class Constants {
 
     public final static int DAY_IN_MILLISECONDS =  24 * 60 * 60 * 1000;
 
+    public final static long MONTH_IN_MILLISECONDS = 30 * 24 * 60 * 60 * 1000L;
+
     public final static String PROBLEM_URL_PREFIX = "https://leetcode.com/problems/";
 
 }

src/main/java/com/rajat_singh/leetcode_api/controller/GlobalContestInfoController.java

@@ -0,0 +1,30 @@
+package com.rajat_singh.leetcode_api.controller;
+
+import com.rajat_singh.leetcode_api.dto.ContestDTO;
+import com.rajat_singh.leetcode_api.dto.ContestsDTO;
+import com.rajat_singh.leetcode_api.service.LeetCodeContestService;
+import lombok.RequiredArgsConstructor;
+import org.springdoc.core.annotations.ParameterObject;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.tinylog.Logger;
+
+
+@RestController
+@RequestMapping("/api/v1/globalContestInfo")
+@RequiredArgsConstructor
+public class GlobalContestInfoController {
+
+    private final LeetCodeContestService leetCodeContestService;
+
+    @GetMapping("/fetchContests")
+    public ResponseEntity<Page<ContestDTO>> getContestsInfo(@ParameterObject Pageable pageable) {
+        Logger.info("Fetching contests info");
+        return ResponseEntity.ok(leetCodeContestService.getContestsInfo(pageable));
+    }
+
+}

src/main/java/com/rajat_singh/leetcode_api/controller/LeetCodeQuestionsController.java

@@ -26,6 +26,9 @@
 public class LeetCodeQuestionsController {
 
     private final LeetCodeQuestionsService leetCodeQuestionsService;
+    /**
+    * TODO: Migrate questionsRepo's logic inside leetCodeQuestionsService for clean controller
+     */
     private final QuestionsRepository questionsRepository;
     private final QuestionMapper questionMapper;
 

src/main/java/com/rajat_singh/leetcode_api/dto/ContestDTO.java

@@ -0,0 +1,15 @@
+package com.rajat_singh.leetcode_api.dto;
+
+import lombok.Data;
+import java.util.List;
+
+@Data
+public class ContestDTO {
+    private Long id;
+    private String title;
+    private String titleSlug;
+    private long startTime;
+    private long originStartTime;
+    private String cardImg;
+    private List<ContestsDTO.Sponsor> sponsors;
+}

src/main/java/com/rajat_singh/leetcode_api/dto/ContestsDTO.java

@@ -0,0 +1,41 @@
+package com.rajat_singh.leetcode_api.dto;
+
+import lombok.Data;
+import java.util.List;
+
+@Data
+public class ContestsDTO {
+
+    private ResponseData data;
+
+    @Data
+    public static class ResponseData {
+        private PastContests pastContests;
+    }
+
+    @Data
+    public static class PastContests {
+        private int pageNum;
+        private int currentPage;
+        private int totalNum;
+        private int numPerPage;
+        private List<ContestData> data;
+    }
+
+    @Data
+    public static class ContestData {
+        private String title;
+        private String titleSlug;
+        private long startTime;
+        private long originStartTime;
+        private String cardImg;
+        private List<Sponsor> sponsors;
+    }
+
+    @Data
+    public static class Sponsor {
+        private String name;
+        private String lightLogo;
+        private String darkLogo;
+    }
+}

src/main/java/com/rajat_singh/leetcode_api/entity/ContestDataEntity.java

@@ -0,0 +1,25 @@
+package com.rajat_singh.leetcode_api.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+import java.util.List;
+
+@Entity
+@Data
+@Table(name = "contest_data")
+public class ContestDataEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String title;
+    private String titleSlug;
+    private long startTime;
+    private long originStartTime;
+    private String cardImg;
+
+    @OneToMany(mappedBy = "contestData", cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
+    private List<SponsorEntity> sponsors;
+}
+

src/main/java/com/rajat_singh/leetcode_api/entity/SponsorEntity.java

@@ -0,0 +1,22 @@
+package com.rajat_singh.leetcode_api.entity;
+
+import jakarta.persistence.*;
+import lombok.Data;
+
+@Entity
+@Data
+@Table(name = "sponsors")
+public class SponsorEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String name;
+    private String lightLogo;
+    private String darkLogo;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "contest_id")
+    private ContestDataEntity contestData;
+}

src/main/java/com/rajat_singh/leetcode_api/graphql/GraphQlQueries.java

@@ -298,5 +298,27 @@ query userProfileCalendar($username: String!, $year: Int) {
             }
             """;
 
+    public static final String FETCH_ALL_PAST_CONTESTS = """
+            query pastContests($pageNo: Int, $numPerPage: Int) {
+              pastContests(pageNo: $pageNo, numPerPage: $numPerPage) {
+                pageNum
+                currentPage
+                totalNum
+                numPerPage
+                data {
+                  title
+                  titleSlug
+                  startTime
+                  originStartTime
+                  cardImg
+                  sponsors {
+                    name
+                    lightLogo
+                    darkLogo
+                  }
+                }
+              }
+            }
+            """;
 
 }

src/main/java/com/rajat_singh/leetcode_api/mappers/ContestMapper.java

@@ -0,0 +1,16 @@
+package com.rajat_singh.leetcode_api.mappers;
+
+import com.rajat_singh.leetcode_api.dto.ContestDTO;
+import com.rajat_singh.leetcode_api.dto.ContestsDTO;
+import com.rajat_singh.leetcode_api.entity.ContestDataEntity;
+import com.rajat_singh.leetcode_api.entity.SponsorEntity;
+import org.mapstruct.Mapper;
+
+import java.util.List;
+
+@Mapper(componentModel = "spring")
+public interface ContestMapper {
+    ContestDTO entityToDTO(ContestDataEntity entity);
+    SponsorEntity dtoToSponsorEntity(ContestsDTO.Sponsor dto);
+    ContestDataEntity dtoToEntity(ContestDTO dto);
+}