257 implementation of json ld standard

backend/demo-group7/src/main/java/com/group7/demo/controllers/PostController.java

@@ -2,10 +2,14 @@
 
 import com.group7.demo.dtos.PostRequest;
 import com.group7.demo.dtos.PostResponse;
+import com.group7.demo.dtos.jsonld.PostJsonLd;
+import com.group7.demo.dtos.mapper.Mapper;
+import com.group7.demo.models.Post;
 import com.group7.demo.services.PostService;
 import jakarta.servlet.http.HttpServletRequest;
 import lombok.AllArgsConstructor;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
@@ -17,6 +21,7 @@
 @RequestMapping("/api/posts")
 @AllArgsConstructor
 public class PostController {
+    private final Mapper mapper;
     private PostService postService;
 
     @PostMapping
@@ -125,5 +130,14 @@ public ResponseEntity<Map<String, Object>> fetchPostsWithPagination(
         return ResponseEntity.ok(response);
     }
 
+    @GetMapping(value = "/{postId}", produces = "application/ld+json")
+    public ResponseEntity<PostJsonLd> getPostJsonLd(@PathVariable Long postId) {
+        Post post = postService.getPostById(postId);
+        PostJsonLd jsonLd = mapper.mapToPostJsonLd(post);
+        return ResponseEntity.ok()
+            .contentType(MediaType.valueOf("application/ld+json"))
+            .body(jsonLd);
+    }
+
 }
 

backend/demo-group7/src/main/java/com/group7/demo/dtos/jsonld/PostJsonLd.java

@@ -0,0 +1,34 @@
+package com.group7.demo.dtos.jsonld;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+import lombok.Data;
+
+import java.util.Map;
+
+@Data
+@Builder
+public class PostJsonLd {
+    @JsonProperty("@context")
+    private String context;
+
+    @JsonProperty("@type")
+    private String type;
+
+    private String identifier;
+    private String text;
+    private String datePublished;
+
+    @JsonProperty("author")
+    private Map<String, String> author;
+
+    private String image;
+
+    @JsonProperty("interactionStatistic")
+    private Map<String, Object>[] interactionStatistics;
+
+    private String[] keywords;
+
+    @JsonProperty("associatedProgram")
+    private Map<String, Object> trainingProgram;
+}

backend/demo-group7/src/main/java/com/group7/demo/dtos/mapper/Mapper.java

@@ -1,6 +1,7 @@
 package com.group7.demo.dtos.mapper;
 
 import com.group7.demo.dtos.*;
+import com.group7.demo.dtos.jsonld.PostJsonLd;
 import com.group7.demo.models.*;
 import com.group7.demo.models.enums.TrainingProgramWithTrackingStatus;
 import com.group7.demo.services.AuthenticationService;
@@ -10,6 +11,7 @@
 
 import java.time.LocalDate;
 import java.util.Comparator;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -222,6 +224,50 @@ public FeedbackResponse mapToFeedbackResponse(Feedback feedback) {
                 .build();
     }
 
+    public PostJsonLd mapToPostJsonLd(Post post) {
+        // Create array of interaction statistics for both likes and bookmarks
+        Map<String, Object>[] interactionStats = new Map[2];
+
+        // Like statistics
+        interactionStats[0] = Map.of(
+            "@type", "InteractionCounter",
+            "interactionType", "https://schema.org/LikeAction",
+            "userInteractionCount", post.getLikedByUsers() != null ? post.getLikedByUsers().size() : 0
+        );
+
+        // Bookmark statistics
+        interactionStats[1] = Map.of(
+            "@type", "InteractionCounter",
+            "interactionType", "https://schema.org/BookmarkAction",
+            "userInteractionCount", post.getBookmarkedByUsers() != null ? post.getBookmarkedByUsers().size() : 0
+        );
 
+        return PostJsonLd.builder()
+            .context("https://schema.org")
+            .type("SocialMediaPosting")
+            .identifier(post.getId().toString())
+            .text(post.getContent())
+            .datePublished(post.getCreatedAt().toString())
+            .author(Map.of(
+                "@type", "Person",
+                "identifier", post.getUser().getId().toString(),
+                "name", post.getUser().getUsername()
+            ))
+            .image(post.getImageUrl() != null ? post.getImageUrl() : "")
+            .interactionStatistics(interactionStats)
+            .keywords(post.getTags() != null ? 
+                post.getTags().stream()
+                    .map(Tag::getName)
+                    .toArray(String[]::new) 
+                : new String[0])
+            .trainingProgram(post.getTrainingProgram() != null ? Map.of(
+                "@type", "ExercisePlan",
+                "identifier", post.getTrainingProgram().getId().toString(),
+                "name", post.getTrainingProgram().getTitle(),
+                "description", post.getTrainingProgram().getDescription(),
+                "instructor", post.getTrainingProgram().getTrainer().getUsername()
+            ) : null)
+            .build();
+    }
 
 }

backend/demo-group7/src/main/java/com/group7/demo/services/PostService.java

@@ -270,4 +270,9 @@ public Map<String, Object> getPostsByTagsWithPagination(Set<String> tagNames, in
         return response;
     }
 
+    public Post getPostById(Long postId) {
+        return postRepository.findById(postId)
+            .orElseThrow(() -> new EntityNotFoundException("Post not found with id: " + postId));
+    }
+
 }