PostController.java

package controllers;
import interfaces.IPostService;
import models.Post;
import models.User;
import java.util.List;

public class PostController {
    
    private IPostService postService;

    // Dependency Injection
    public PostController(IPostService service) {
        this.postService = service;
    }

    public void createNewPost(String content, User author) {
        if(content.isEmpty()) {
            System.out.println("Error: Post content cannot be empty.");
            return;
        }
        postService.createPost(content, author);
    }

    // New Function: Display the Timeline
    public void showAllPosts() {
        System.out.println("\n--- Timeline (News Feed) ---");
        
        // Fetch data from Service Layer
        List<Post> allPosts = postService.getAllPosts();
        
        if (allPosts.isEmpty()) {
            System.out.println("No posts available to display.");
        } else {
            for (Post p : allPosts) {
                System.out.println("@" + p.getAuthor().getFullName() + ": " + p.getContent());
                System.out.println("-----------------------------");
            }
        }
    }
}