valence-battle/src/chat.rs

use valence::prelude::{event::ChatMessage, *};

pub fn chat_handler(
    mut clients: Query<(&mut Client, &Username)>,
    mut messages: EventReader<ChatMessage>,
) {
    for message in messages.iter() {
        let username = match clients.get_component::<Username>(message.client) {
            Ok(username) => username.to_string(),
            _ => "Unknown".to_string(),
        };

        let new_message = format!("[{}] ", username).not_bold().color(Color::GOLD)
            + message.message.to_string().not_bold().color(Color::WHITE);

        for (mut client, _) in &mut clients {
            client.send_message(new_message.clone());
        }
    }
}

pub fn player_joined(mut clients: Query<(&mut Client, &Username)>) {
    let mut messages: Vec<Text> = vec![];

    for (mut client, username) in &mut clients {
        if client.is_added() {
            messages.push(
                format!("{} joined the game", username)
                    .italic()
                    .color(Color::GRAY),
            );
        }

        for message in messages.iter() {
            client.send_message(message.clone());
        }
    }
}