first version of link controller with all endpoints. !bug is present!…

src/main/java/com/linkurlshorter/urlshortener/link/LinkController.java

@@ -13,7 +13,10 @@
 import org.springframework.web.bind.annotation.*;
 
 import java.time.LocalDateTime;
+import java.util.Comparator;
+import java.util.List;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 /**
  * Controller for Link-related operations such as create, delete, update and get info + statistics
@@ -31,7 +34,7 @@ public class LinkController {
     private final LinkService linkService;
     private final UserService userService;
     private final EntityManager entityManager;
-    private final LinkInfoResponseMapper infoResponseMapper;
+    private final LinkInfoDtoMapper linkDtoMapper;
 
     /**
      * Controller method for creating a new link.
@@ -134,6 +137,50 @@ public ResponseEntity<LinkModifyingResponse> refreshLink(@RequestParam UUID id)
             throw new ForbiddenException(OPERATION_FORBIDDEN_MSG);
         }
     }
+        //TODO: for info and all-links-info exclude all results of status DELETED!
+    @GetMapping("/info")
+    public ResponseEntity<LinkInfoResponse> getInfoByShortLink(@RequestParam String shortLink) {
+        Link link = linkService.findByShortLink(shortLink);
+        if (doesUserHaveRightsForLinkById(link.getId())) {
+            LinkInfoDto dto = linkDtoMapper.mapLinkToDto(link);
+            LinkInfoResponse response = new LinkInfoResponse(List.of(dto), "ok");
+            return ResponseEntity.ok(response);
+        } else {
+            throw new ForbiddenException(OPERATION_FORBIDDEN_MSG);
+        }
+    }
+
+    @GetMapping("/all-links-info")
+    public ResponseEntity<LinkInfoResponse> getAllLinksForUser() {
+        try {
+            Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+            User requesterUser = userService.findByEmail(authentication.getName());
+            List<LinkInfoDto> linksDto = linkService
+                    .findAllByUser(requesterUser)
+                    .stream()
+                    .map(linkDtoMapper::mapLinkToDto)
+                    .sorted(Comparator.comparing(LinkInfoDto::getUsageStatistics).reversed())
+                    .collect(Collectors.toList());
+            return ResponseEntity.ok(new LinkInfoResponse(linksDto, "ok"));
+        } catch (Exception e) {
+            throw new InternalServerLinkException();
+        }
+
+    }
+
+    //TODO: exclude all results of non-Active (or only of DELETED?)
+    @GetMapping("/url-usage-top-for-user")
+    public ResponseEntity<LinkStatisticsResponse> getLinksStatsForUser() {
+        try {
+            Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+            User requesterUser = userService.findByEmail(authentication.getName());
+            List<LinkStatisticsDto> stats = linkService.getLinkUsageStatsByUserId(requesterUser.getId());
+            stats.sort(Comparator.comparing(LinkStatisticsDto::getUsageStatistics).reversed());
+            return ResponseEntity.ok(new LinkStatisticsResponse(stats, "ok"));
+        } catch (Exception e) {
+            throw new InternalServerLinkException();
+        }
+    }
 
     /**
      * Generates a new short link.

src/main/java/com/linkurlshorter/urlshortener/link/LinkInfoDto.java

@@ -0,0 +1,32 @@
+package com.linkurlshorter.urlshortener.link;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+/**
+ * Represents a dto containing information about a link.
+ * This class provides various properties related to a link, such as its ID, long link,
+ * short link, creation time, expiration time, usage statistics, and status.
+ * Instances of this class can be created using the provided builder pattern.
+ *
+ * @author Artem Poliakov
+ * @version 1.0
+ */
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class LinkInfoDto {
+    private UUID id;
+    private String longLink;
+    private String shortLink;
+    private LocalDateTime createdTime;
+    private LocalDateTime expirationTime;
+    private int usageStatistics;
+    private LinkStatus status;
+}

src/main/java/com/linkurlshorter/urlshortener/link/LinkInfoResponseMapper.java → src/main/java/com/linkurlshorter/urlshortener/link/LinkInfoDtoMapper.java

@@ -13,17 +13,16 @@
  * @version 1.0
  */
 @Component
-public class LinkInfoResponseMapper {
-    public LinkInfoResponse mapLinkToResponse(Link link, String error) {
-        return LinkInfoResponse.builder()
+public class LinkInfoDtoMapper {
+    public LinkInfoDto mapLinkToDto(Link link) {
+        return LinkInfoDto.builder()
                 .id(link.getId())
                 .longLink(link.getLongLink())
                 .shortLink(link.getShortLink())
                 .createdTime(link.getCreatedTime())
                 .expirationTime(link.getExpirationTime())
                 .usageStatistics(link.getStatistics())
                 .status(link.getStatus())
-                .error(error)
                 .build();
     }
 }

src/main/java/com/linkurlshorter/urlshortener/link/LinkInfoResponse.java

@@ -5,29 +5,13 @@
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
-import java.time.LocalDateTime;
-import java.util.UUID;
+import java.util.List;
 
-/**
- * Represents a response containing information about a link.
- * This class provides various properties related to a link, such as its ID, long link,
- * short link, creation time, expiration time, usage statistics, and status.
- * Instances of this class can be created using the provided builder pattern.
- *
- * @author Artem Poliakov
- * @version 1.0
- */
 @Data
 @AllArgsConstructor
 @NoArgsConstructor
 @Builder
 public class LinkInfoResponse {
+    private List<LinkInfoDto> linkDtoList;
     private String error;
-    private UUID id;
-    private String longLink;
-    private String shortLink;
-    private LocalDateTime createdTime;
-    private LocalDateTime expirationTime;
-    private int usageStatistics;
-    private LinkStatus status;
 }

src/main/java/com/linkurlshorter/urlshortener/link/LinkRepository.java

@@ -1,5 +1,6 @@
 package com.linkurlshorter.urlshortener.link;
 
+import com.linkurlshorter.urlshortener.user.User;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 import org.springframework.data.jpa.repository.Modifying;
@@ -9,6 +10,7 @@
 
 import java.sql.Timestamp;
 import java.time.LocalDateTime;
+import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
 
@@ -31,4 +33,10 @@ public interface LinkRepository extends JpaRepository<Link, UUID> {
      * @return An {@link java.util.Optional} containing the retrieved link entity, or empty if no link is found with the specified short link.
      */
     Optional<Link> findByShortLink(String shortLink);
+
+    List<Link> findAllByUser(User user);
+
+    @Query("SELECT new com.linkurlshorter.urlshortener.link.LinkStatisticsDto(l.id, l.shortLink, l.statistics)" +
+            " FROM Link l WHERE l.user.id = :userId")
+    List<LinkStatisticsDto> getLinkUsageStatsForUser(@Param(value = "userId") UUID userId);
 }

src/main/java/com/linkurlshorter/urlshortener/link/LinkService.java

@@ -1,8 +1,10 @@
 package com.linkurlshorter.urlshortener.link;
 
+import com.linkurlshorter.urlshortener.user.User;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
+import java.util.List;
 import java.util.Objects;
 import java.util.UUID;
 
@@ -86,6 +88,19 @@ public Link findByShortLink(String shortLink) {
         return link;
     }
 
+    public List<Link> findAllByUser(User user){
+        if(Objects.isNull(user)){
+            throw new NullLinkPropertyException();
+        }
+        return linkRepository.findAllByUser(user);
+    }
+
+    public List<LinkStatisticsDto> getLinkUsageStatsByUserId(UUID userId){
+        if(Objects.isNull(userId)){
+            throw new NullLinkPropertyException();
+        }
+        return linkRepository.getLinkUsageStatsForUser(userId);
+    }
     /**
      * Marks a link entity as deleted by its short link.
      *

src/main/java/com/linkurlshorter/urlshortener/link/LinkStatisticsDto.java

@@ -0,0 +1,18 @@
+package com.linkurlshorter.urlshortener.link;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class LinkStatisticsDto {
+    private UUID id;
+    private String shortLink;
+    private int usageStatistics;
+}

src/main/java/com/linkurlshorter/urlshortener/link/LinkStatisticsResponse.java

@@ -0,0 +1,17 @@
+package com.linkurlshorter.urlshortener.link;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class LinkStatisticsResponse {
+    private List<LinkStatisticsDto> linksStatsList;
+    private String error;
+}

src/main/java/com/linkurlshorter/urlshortener/user/UserRepository.java

@@ -1,5 +1,6 @@
 package com.linkurlshorter.urlshortener.user;
 
+import org.springframework.data.jpa.repository.EntityGraph;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;