Add channels list command

src/fr/univ/lyon1/client/Client.java

@@ -18,6 +18,7 @@ import java.io.ObjectOutputStream;
 import java.net.Socket;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
 
 public class Client {
     private final int port;
@@ -92,6 +93,7 @@ public class Client {
             case login -> commandLogin();
             case message -> commandMessage(cmd);
             case list -> commandList(cmd);
+            case listChannels -> commandListChannels(cmd);
             case join -> commandJoin(cmd);
         }
     }
@@ -99,6 +101,8 @@ public class Client {
     private void commandLogin() throws IOException {
         out.writeObject(new Command(CommandType.list, null));
         out.flush();
+        out.writeObject(new Command(CommandType.listChannels, null));
+        out.flush();
         out.writeObject(new Command(CommandType.join, List.of("general")));
         out.flush();
     }
@@ -109,10 +113,11 @@ public class Client {
     }
 
     private void commandList(Command cmd) {
-        List<Object> users = cmd.getArgs();
+        System.out.println("Users: "+cmd.getArgs().stream().map(Object::toString).collect(Collectors.joining(", ")));
-        for (Object u : users) {
+    }
-            System.out.println(u);
+
-        }
+    private void commandListChannels(Command cmd) {
+        System.out.println("Channels: "+cmd.getArgs().stream().map(Object::toString).collect(Collectors.joining(", ")));
     }
 
     private void commandJoin(Command cmd) {

src/fr/univ/lyon1/server/ConnectedClient.java

@@ -48,6 +48,7 @@ public class ConnectedClient implements Runnable {
             case login -> commandLogin(command);
             case message -> commandMessage(command);
             case list -> commandList();
+            case listChannels -> commandListChannels();
             case join -> commandJoin(command);
         }
     }
@@ -89,7 +90,12 @@ public class ConnectedClient implements Runnable {
     }
 
     private void commandList() throws IOException {
-            out.writeObject(new Command(CommandType.list, Collections.singletonList(server.getUsers())));
+        out.writeObject(new Command(CommandType.list, Collections.singletonList(server.getUsers())));
+        out.flush();
+    }
+
+    private void commandListChannels() throws IOException {
+        out.writeObject(new Command(CommandType.listChannels, Collections.singletonList((List<Channel>)(List<?>) ChannelModel.getAll())));
         out.flush();
     }
 

src/fr/univ/lyon1/server/models/ChannelModel.java

@@ -6,6 +6,8 @@ import fr.univ.lyon1.common.User;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 
 public class ChannelModel extends Channel implements Model {
@@ -63,6 +65,25 @@ public class ChannelModel extends Channel implements Model {
         return null;
     }
 
+    public static List<ChannelModel> getAll() {
+        List<ChannelModel> channels = new ArrayList<>();
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT * FROM "+TABLE_NAME);
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                while (rs.next())
+                    channels.add(new ChannelModel(
+                            UUID.fromString(rs.getString("UUID")),
+                            rs.getString("NAME"))
+                    );
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return channels;
+    }
+
     private boolean exist() {
         try {
             PreparedStatement ps = database.getConnection().prepareStatement("SELECT UUID FROM "+TABLE_NAME+" WHERE UUID = ?");