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amyyong11amyyong11
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Implemented login for user
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‎src/main/java/app_screen/AppScreen.java‎

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package app_screen;
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import app_screen_use_case.AppScreenController;
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import app_screen_use_case.AppScreenPresenter;
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import app_screen_use_case.ChatName;
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import app_screen_use_case.Refresh;
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import entities.Chat;
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import javax.swing.*;
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import java.awt.*;
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import java.util.ArrayList;
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public class AppScreen implements AppScreenPresenter, AppScreenController, ChatName, Refresh {
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private final JFrame jFrame;
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private JScrollPane jScrollPane;
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private final String currentUsername;
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private ArrayList<Chat> chats;
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/**
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Create an AppScreen object
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@param chats This is a list of chats given by the user (the list will always come as sorted with the
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most recent chats at the end of the list)
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*/
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public AppScreen(String currentUsername, ArrayList<Chat> chats) {
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this.currentUsername = currentUsername;
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this.chats = chats;
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jFrame = new JFrame();
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jFrame.setSize(300, 500);
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jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
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// top panel containing the buttons for creating a new chat
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JPanel topPanel = new JPanel();
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topPanel.setLayout(new GridLayout(1,2));
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JButton addPrivateChat = new JButton("+ Private Chat");
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JButton addGroupChat = new JButton("+ Group Chat");
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addPrivateChat.setPreferredSize(new Dimension(40, 30));
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addGroupChat.setPreferredSize(new Dimension(40, 30));
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// adding the action listeners for the +private-chat and +group-chat buttons
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addPrivateChat.addActionListener(e -> {
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ChatView newChat = new ChatView(currentUsername, true);
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newChat.chatDisplay();
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});
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addGroupChat.addActionListener(e -> {
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ChatView newChat = new ChatView(currentUsername, true);
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newChat.chatDisplay();
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});
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topPanel.add(addPrivateChat);
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topPanel.add(addGroupChat);
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jFrame.add(topPanel, BorderLayout.NORTH);
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this.chats = chats;
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openScreen();
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}
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/**
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* Attempts to open the screen to display to the user
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*/
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@Override
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public void openScreen() {
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try{
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displayAppScreen();
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} catch (Exception e) {
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throw new RuntimeException("Unable to to open screen");
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}
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}
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/**
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Display a screen containing an ordered list of chats to the user based on latest conversation times
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*/
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public void displayAppScreen(){
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JPanel jPanel = new JPanel();
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// getting the names of each chat to display and creating buttons for each chat
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for (int i = this.chats.size() - 1; i > -1; i--) {
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String chatName = getChatName(this.chats.get(i));
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JButton b = new JButton(chatName);
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b.setPreferredSize(new Dimension(280, 50));
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JLabel jLabel = new JLabel("time");
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jLabel.setAlignmentX(Component.RIGHT_ALIGNMENT);
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jLabel.setFont(new Font(null, Font.BOLD, 11));
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b.add(jLabel);
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// defines the action of opening a chat when a chat is clicked on
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b.addActionListener(e -> {
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ChatView newChat = new ChatView(currentUsername, false);
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newChat.chatDisplay();
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});
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jPanel.add(b);
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}
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jPanel.setAlignmentY(Component.CENTER_ALIGNMENT);
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// set height of panel to appropriate size based on the number of chats
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jPanel.setPreferredSize(new Dimension(100, 60 * this.chats.size()));
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jPanel.setBorder(BorderFactory.createTitledBorder("My Chats"));
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// making the chat list scrollable
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scrollableChats(jPanel);
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jFrame.setVisible(true);
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}
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/**
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Make the chat list scrollable
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@param jPanel The panel containing the chats
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*/
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private void scrollableChats(JPanel jPanel) {
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JScrollPane scrollFrame = new JScrollPane(jPanel);
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jScrollPane = scrollFrame;
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scrollFrame.setPreferredSize(new Dimension( 200,500));
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scrollFrame. getVerticalScrollBar().setUnitIncrement(5);
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jFrame.getContentPane().add(scrollFrame);
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}
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/**
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* Get the name of the chat
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* @param chat The chat in context
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* @return name
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*/
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@Override
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public String getChatName(Chat chat) {
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return chat.getName();
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}
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/**
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* Update the order of the chats
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* @param chat The chat that has an update
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*/
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public void updateChatOrder(Chat chat){
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if (this.chats.contains(chat)) {
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this.chats.remove(chat);
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this.chats.add(chat);
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}
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else {
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this.chats.add(chat);
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}
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}
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/**
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* Add a new chat to the screen, if the chat already exists (i.e. there exists a chat with the
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* same ID, do nothing)
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* @param chat The new chat to be added
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*/
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public void addNewChat(Chat chat){
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if (!(this.chats.contains(chat))){
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updateChatOrder(chat);
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jFrame.remove(this.jScrollPane);
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// refresh the screen
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displayAppScreen();
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}
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}
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/**
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* Update the order of chats that appear on screen if there was a change to conversation history
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* @param chatID The ID of the given chat
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*/
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@Override
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public void updateScreen(String chatID) {
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if (hasUpdate(chatID)){
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updateChatOrder(getChat(chatID));
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jFrame.remove(this.jScrollPane);
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// refresh the screen
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displayAppScreen();
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}
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}
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/**
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* Return true if the given chat as an update to its conversation history
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* @param chatID The ID of the given chat
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* @return true/false
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*/
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@Override
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public boolean hasUpdate(String chatID) {
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Chat chat = getChat(chatID);
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return this.chats.get(this.chats.size() - 1) != chat;
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}
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/**
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* Get the chat object given its chat ID
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* @param chatID The ID of the chat
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* @return The chat with the given ID
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*/
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@Override
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public Chat getChat(String chatID) {
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for (Chat chat: this.chats){
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if (chat.getChatID().equals(chatID)){
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return chat;
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}
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}
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throw new RuntimeException("Current user is not part of this chat");
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}
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}

‎src/main/java/app_screen_interface_adapters/AppScreenLoader.java‎

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package app_screen_interface_adapters;
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import app_screen_use_case.AppScreenPresenter;
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import app_screen.AppScreen;
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import entities.Chat;
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import java.util.ArrayList;
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public class AppScreenLoader implements AppScreenPresenter {
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private final String username;
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private final ArrayList<Chat> chats;
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public AppScreen appScreen;
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/**
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* Create the app screen loader (and store its user and chat information)
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* @param username The username of the current user
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*/
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public AppScreenLoader(String username, ArrayList<Chat> chats){
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this.username = username;
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this.chats = chats;
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try {
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openScreen();
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} catch (Exception e) {
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throw new RuntimeException("Unexpected Interruption: cannot load screen");
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}
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}
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/**
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* Create the screen to show to the user
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*/
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@Override
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public void openScreen() {
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this.appScreen = new AppScreen(this.username, this.chats);
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}
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}

‎src/main/java/app_screen_interface_adapters/UserAppScreenGateway.java‎

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package app_screen_interface_adapters;
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import Interface_adapters.Login;
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import entities.User;
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import data_access.UserDataBase;
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import java.io.File;
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import java.util.ArrayList;
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public class UserAppScreenGateway implements Login {
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private final UserDatabase userDatabase;
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private final File userAccounts;
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private String username;
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private ArrayList<Chat> userChats;
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/**
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* Create gateway between user and appscreen
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*/
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public UserAppScreenGateway(String username){
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this.username = username;
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// should be given the path of the file
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this.userAccounts = new File("\data_access\UserAccounts.csv");
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this.userDatabase = new UserDatabase(userAccounts);
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login();
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}
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/**
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* Log the user into the system
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*/
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public void login(){;
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this.userChats = userDatabase.getUserChats(this.username);
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AppScreenLoader appScreenLoader = new AppScreenLoader(this.username, this.userChats);
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}
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}

‎src/main/java/app_screen_use_case/AppScreenController.java‎

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package app_screen_use_case;
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import entities.Chat;
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public interface AppScreenController{
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Chat getChat(String chatID);
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}

‎src/main/java/app_screen_use_case/AppScreenPresenter.java‎

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package app_screen_use_case;
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public interface AppScreenPresenter {
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void openScreen();
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}

‎src/main/java/app_screen_use_case/ChatName.java‎

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package app_screen_use_case;
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import entities.Chat;
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public interface ChatName {
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String getChatName(Chat chat);
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}

‎src/main/java/app_screen_use_case/Refresh.java‎

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package app_screen_use_case;
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public interface Refresh {
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boolean hasUpdate(String chatID);
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void updateScreen(String chatID);
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}

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