import java.util.*;

/**

* Created by alex on 07/12/2016.

*/

public class PostManager {

/**

* Singleton

*/

private static PostManager postManager = new PostManager();

private PostManager() {

}

public static PostManager getInstance() {

return postManager;

}

/**

* HashMap with postId containing an HashMap with the userId and the text of the post.

*/

private static Map<Integer, Post> posts = new HashMap<>();

private static Integer currentId = 0;

public void addPost() {

Scanner scanner = new Scanner(System.in);

System.out.println("From which user is the post? ");

UserManager userManager = UserManager.getInstance();

if (userManager.countUsers() == 0) {

System.out.println("No users available!");

return;

}

userManager.printAllUsers();

Integer userId = scanner.nextInt();

User user = userManager.getUserById(userId);

System.out.println("What is the post from " + user + "?");

// Skip the newline

scanner.nextLine();

String text = scanner.nextLine();

Post post = new Post(userId, text);

posts.put(currentId, post);

currentId++;

}

public void viewAllPosts() {

UserManager userManager = UserManager.getInstance();

posts.forEach((k,v) -> {

System.out.println("[" + k + "]");

System.out.println("\t" + userManager.getUserById(v.getUserId()));

System.out.println("\t" + v.getText());

});

}

public void viewPostsByUser() {

UserManager userManager = UserManager.getInstance();

System.out.println("Posts by which user?");

userManager.printAllUsers();

Scanner scanner = new Scanner(System.in);

int userId = scanner.nextInt();

System.out.println(userManager.getUserById(userId));

posts.forEach((k,v) -> {

if(v.getUserId() == userId) {

System.out.println(v.getText());

System.out.println("#################");

}

});

}

}