Command /say (#211)

* add say command

pumpkin/src/commands/cmd_say.rs

@@ -0,0 +1,48 @@
+use super::{
+    arg_simple::SimpleArgConsumer,
+    tree::CommandTree,
+    tree_builder::{argument, require},
+    CommandExecutor, CommandSender,
+};
+use async_trait::async_trait;
+use pumpkin_core::text::TextComponent;
+use pumpkin_protocol::client::play::CSystemChatMessage;
+
+const NAMES: [&str; 1] = ["say"];
+
+const DESCRIPTION: &str = "Broadcast a message to all Players.";
+
+const ARG_MESSAGE: &str = "message";
+
+struct SayExecutor {}
+
+#[async_trait]
+impl CommandExecutor for SayExecutor {
+    async fn execute<'a>(
+        &self,
+        sender: &mut super::CommandSender<'a>,
+        server: &crate::server::Server,
+        args: &super::tree::ConsumedArgs<'a>,
+    ) -> Result<(), super::dispatcher::InvalidTreeError> {
+        let sender = match sender {
+            CommandSender::Console => "Console",
+            CommandSender::Rcon(_) => "Rcon",
+            CommandSender::Player(player) => &player.gameprofile.name,
+        };
+
+        server
+            .broadcast_packet_all(&CSystemChatMessage::new(
+                &TextComponent::text(&format!("[{}] {}", sender, args.get("message").unwrap())),
+                false,
+            ))
+            .await;
+        Ok(())
+    }
+}
+
+pub fn init_command_tree<'a>() -> CommandTree<'a> {
+    CommandTree::new(NAMES, DESCRIPTION).with_child(
+        require(&|sender| sender.permission_lvl() >= 2)
+            .with_child(argument(ARG_MESSAGE, &SimpleArgConsumer {}).execute(&SayExecutor {})),
+    )
+}

pumpkin/src/commands/mod.rs

@@ -19,6 +19,7 @@ mod cmd_help;
 mod cmd_kick;
 mod cmd_kill;
 mod cmd_pumpkin;
+mod cmd_say;
 mod cmd_stop;
 mod cmd_worldborder;
 
@@ -71,6 +72,7 @@ pub fn default_dispatcher<'a>() -> Arc<CommandDispatcher<'a>> {
     let mut dispatcher = CommandDispatcher::default();
 
     dispatcher.register(cmd_pumpkin::init_command_tree());
+    dispatcher.register(cmd_say::init_command_tree());
     dispatcher.register(cmd_gamemode::init_command_tree());
     dispatcher.register(cmd_stop::init_command_tree());
     dispatcher.register(cmd_help::init_command_tree());