feat: allow images in posts

backend/src/main/java/online/wesal/wesal/controller/PostController.java

@@ -44,6 +44,7 @@ public class PostController {
                 .map(error -> {
                     String field = error.getField();
                     if ("body".equals(field)) return "Post body is required and cannot exceed 2000 characters";
+                    if ("images".equals(field)) return "Post cannot have more than 10 images";
                     return error.getDefaultMessage();
                 })
                 .findFirst()
@@ -52,7 +53,7 @@ public class PostController {
         }
         
         try {
-            PostResponseDTO response = postService.createPostWithResponse(request.getBody());
+            PostResponseDTO response = postService.createPostWithResponse(request.getBody(), request.getImages());
             return ResponseEntity.ok(ApiResponse.success(response));
         } catch (RuntimeException e) {
             String message;

backend/src/main/java/online/wesal/wesal/dto/PostCreateRequestDTO.java

@@ -2,6 +2,7 @@ package online.wesal.wesal.dto;
 
 import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Size;
+import java.util.List;
 
 public class PostCreateRequestDTO {
     
@@ -9,12 +10,20 @@ public class PostCreateRequestDTO {
     @Size(max = 2000, message = "Post body cannot exceed 2000 characters")
     private String body;
     
+    @Size(max = 10, message = "Post cannot have more than 10 images")
+    private List<String> images;
+    
     public PostCreateRequestDTO() {}
     
     public PostCreateRequestDTO(String body) {
         this.body = body;
     }
     
+    public PostCreateRequestDTO(String body, List<String> images) {
+        this.body = body;
+        this.images = images;
+    }
+    
     public String getBody() {
         return body;
     }
@@ -22,4 +31,12 @@ public class PostCreateRequestDTO {
     public void setBody(String body) {
         this.body = body;
     }
+    
+    public List<String> getImages() {
+        return images;
+    }
+    
+    public void setImages(List<String> images) {
+        this.images = images;
+    }
 }

backend/src/main/java/online/wesal/wesal/dto/PostResponseDTO.java

@@ -3,6 +3,7 @@ package online.wesal.wesal.dto;
 import online.wesal.wesal.entity.Post;
 import online.wesal.wesal.entity.User;
 import java.time.LocalDateTime;
+import java.util.List;
 
 public class PostResponseDTO {
     
@@ -13,6 +14,7 @@ public class PostResponseDTO {
     private String comments;
     private boolean liked;
     private LocalDateTime creationDate;
+    private List<String> images;
     
     public PostResponseDTO() {}
     
@@ -24,6 +26,7 @@ public class PostResponseDTO {
         this.comments = String.valueOf(post.getComments());
         this.liked = false; // Default value, will be set by service
         this.creationDate = post.getCreationDate();
+        this.images = post.getImages();
     }
     
     public PostResponseDTO(Post post, User creator, boolean liked) {
@@ -34,6 +37,7 @@ public class PostResponseDTO {
         this.comments = String.valueOf(post.getComments());
         this.liked = liked;
         this.creationDate = post.getCreationDate();
+        this.images = post.getImages();
     }
     
     public String getId() {
@@ -91,4 +95,12 @@ public class PostResponseDTO {
     public void setCreationDate(LocalDateTime creationDate) {
         this.creationDate = creationDate;
     }
+    
+    public List<String> getImages() {
+        return images;
+    }
+    
+    public void setImages(List<String> images) {
+        this.images = images;
+    }
 }

backend/src/main/java/online/wesal/wesal/dto/PostWithLikesResponseDTO.java

@@ -15,6 +15,7 @@ public class PostWithLikesResponseDTO {
     private boolean liked;
     private LocalDateTime creationDate;
     private List<LikedUserDTO> likedUsers;
+    private List<String> images;
     
     public PostWithLikesResponseDTO() {}
     
@@ -27,6 +28,7 @@ public class PostWithLikesResponseDTO {
         this.liked = liked;
         this.creationDate = post.getCreationDate();
         this.likedUsers = likedUsers;
+        this.images = post.getImages();
     }
     
     public String getId() {
@@ -92,4 +94,12 @@ public class PostWithLikesResponseDTO {
     public void setLikedUsers(List<LikedUserDTO> likedUsers) {
         this.likedUsers = likedUsers;
     }
+    
+    public List<String> getImages() {
+        return images;
+    }
+    
+    public void setImages(List<String> images) {
+        this.images = images;
+    }
 }

backend/src/main/java/online/wesal/wesal/entity/Post.java

@@ -2,7 +2,12 @@ package online.wesal.wesal.entity;
 
 import jakarta.persistence.*;
 import jakarta.validation.constraints.NotBlank;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import java.time.LocalDateTime;
+import java.util.List;
+import java.util.ArrayList;
 
 @Entity
 @Table(name = "posts")
@@ -28,6 +33,9 @@ public class Post {
     @Column(nullable = false)
     private LocalDateTime creationDate = LocalDateTime.now();
     
+    @Column(columnDefinition = "TEXT")
+    private String images = "[]";
+    
     public Post() {}
     
     public Post(Long creatorId, String body) {
@@ -35,6 +43,12 @@ public class Post {
         this.body = body;
     }
     
+    public Post(Long creatorId, String body, List<String> images) {
+        this.creatorId = creatorId;
+        this.body = body;
+        this.setImages(images);
+    }
+    
     public Long getId() {
         return id;
     }
@@ -82,4 +96,33 @@ public class Post {
     public void setCreationDate(LocalDateTime creationDate) {
         this.creationDate = creationDate;
     }
+    
+    public List<String> getImages() {
+        if (images == null || images.isEmpty()) {
+            return new ArrayList<>();
+        }
+        try {
+            ObjectMapper mapper = new ObjectMapper();
+            return mapper.readValue(images, new TypeReference<List<String>>() {});
+        } catch (Exception e) {
+            return new ArrayList<>();
+        }
+    }
+    
+    public void setImages(List<String> images) {
+        if (images == null || images.isEmpty()) {
+            this.images = "[]";
+            return;
+        }
+        
+        // Limit to 10 images
+        List<String> limitedImages = images.size() > 10 ? images.subList(0, 10) : images;
+        
+        try {
+            ObjectMapper mapper = new ObjectMapper();
+            this.images = mapper.writeValueAsString(limitedImages);
+        } catch (Exception e) {
+            this.images = "[]";
+        }
+    }
 }

backend/src/main/java/online/wesal/wesal/service/CommentService.java

@@ -31,6 +31,9 @@ public class CommentService {
     @Autowired
     private UserService userService;
     
+    @Autowired
+    private SubscriptionNotificationService subscriptionNotificationService;
+    
     @Transactional
     public CommentResponseDTO createComment(Long postId, String body, Long replyComment) {
         User currentUser = userService.getCurrentUser();
@@ -70,6 +73,14 @@ public class CommentService {
         post.setComments(post.getComments() + 1);
         postRepository.save(post);
         
+        // Send notification to post creator if they're subscribed to "postcomments" and it's not their own comment
+        User postCreator = userRepository.findById(post.getCreatorId()).orElse(null);
+        if (postCreator != null && !postCreator.getId().equals(currentUser.getId())) {
+            String title = String.format("%s replied to your post", currentUser.getDisplayName());
+            String excerpt = subscriptionNotificationService.truncateText(body, 60);
+            subscriptionNotificationService.sendNotificationToUser(postCreator, "postcomments", title, excerpt);
+        }
+        
         return new CommentResponseDTO(comment, currentUser, replyUser);
     }
     

backend/src/main/java/online/wesal/wesal/service/PostService.java

@@ -34,10 +34,24 @@ public class PostService {
     @Autowired
     private UserService userService;
     
+    @Autowired
+    private SubscriptionNotificationService subscriptionNotificationService;
+    
     public Post createPost(String body) {
+        return createPost(body, null);
+    }
+    
+    public Post createPost(String body, List<String> images) {
         User currentUser = userService.getCurrentUser();
-        Post post = new Post(currentUser.getId(), body);
+        Post post = new Post(currentUser.getId(), body, images);
-        return postRepository.save(post);
+        Post savedPost = postRepository.save(post);
+        
+        // Send notification to users subscribed to "newposts"
+        String title = String.format("%s just posted", currentUser.getDisplayName());
+        String excerpt = subscriptionNotificationService.truncateText(body, 80);
+        subscriptionNotificationService.sendNotificationToSubscription("newposts", title, excerpt);
+        
+        return savedPost;
     }
     
     public List<PostResponseDTO> getAllRecentPosts() {
@@ -93,9 +107,19 @@ public class PostService {
     }
     
     public PostResponseDTO createPostWithResponse(String body) {
+        return createPostWithResponse(body, null);
+    }
+    
+    public PostResponseDTO createPostWithResponse(String body, List<String> images) {
         User currentUser = userService.getCurrentUser();
-        Post post = new Post(currentUser.getId(), body);
+        Post post = new Post(currentUser.getId(), body, images);
         post = postRepository.save(post);
+        
+        // Send notification to users subscribed to "newposts"
+        String title = String.format("%s just posted", currentUser.getDisplayName());
+        String excerpt = subscriptionNotificationService.truncateText(body, 80);
+        subscriptionNotificationService.sendNotificationToSubscription("newposts", title, excerpt);
+        
         return new PostResponseDTO(post, currentUser, false); // New post is not liked by default
     }
     

backend/src/main/java/online/wesal/wesal/service/SubscriptionNotificationService.java

@@ -12,6 +12,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -74,4 +75,47 @@ public class SubscriptionNotificationService {
             logger.error("Failed to send notifications for subscription '{}': {}", subscriptionName, e.getMessage(), e);
         }
     }
+
+    @Async
+    public void sendNotificationToUser(User user, String subscriptionName, String title, String body) {
+        if (user == null || user.getFcmToken() == null || user.getFcmToken().trim().isEmpty()) {
+            logger.warn("User has no valid FCM token, skipping notification");
+            return;
+        }
+
+        // Check if user is subscribed
+        if (!user.getSubscriptions().contains(subscriptionName)) {
+            logger.debug("User {} is not subscribed to '{}', skipping notification", user.getDisplayName(), subscriptionName);
+            return;
+        }
+
+        try {
+            MulticastMessage message = MulticastMessage.builder()
+                    .setNotification(Notification.builder()
+                            .setTitle(title)
+                            .setBody(body)
+                            .build())
+                    .addAllTokens(Collections.singletonList(user.getFcmToken()))
+                    .build();
+
+            BatchResponse response = FirebaseMessaging.getInstance().sendEachForMulticast(message);
+            
+            if (response.getSuccessCount() > 0) {
+                logger.info("Successfully sent notification to {}", user.getDisplayName());
+            } else {
+                logger.error("Failed to send notification to {}: {}", 
+                           user.getDisplayName(), response.getResponses().get(0).getException().getMessage());
+            }
+
+        } catch (Exception e) {
+            logger.error("Failed to send notification to {}: {}", user.getDisplayName(), e.getMessage(), e);
+        }
+    }
+
+    public String truncateText(String text, int maxLength) {
+        if (text == null || text.length() <= maxLength) {
+            return text;
+        }
+        return text.substring(0, maxLength).trim() + "...";
+    }
 }