Add more commands

src/default_commands/src/lib.rs

@@ -3,6 +3,7 @@ mod credits;
 pub mod echo;
 pub mod gamemode;
 mod kill;
+mod list;
 mod motion;
 pub mod op;
 mod stop;

src/default_commands/src/list.rs

@@ -0,0 +1,55 @@
+use bevy_ecs::prelude::{Entity, Query, Res, With};
+use temper_command_infra::{CommandHandler, CommandResult, CommandSource};
+use temper_components::entity_identity::Identity;
+use temper_components::player::player_marker::PlayerMarker;
+use temper_macros::Command;
+use temper_state::GlobalStateResource;
+
+#[derive(Command)]
+#[command(name = "list")]
+enum ListCommand {
+    Normal,
+    #[literal("uuid")]
+    Uuid,
+}
+
+impl CommandHandler for ListCommand {
+    type SystemParam<'w, 's> = (
+        Res<'w, GlobalStateResource>,
+        Query<'w, 's, (Entity, &'static Identity), With<PlayerMarker>>,
+    );
+
+    fn handle(
+        self,
+        source: CommandSource,
+        params: &mut Self::SystemParam<'_, '_>,
+    ) -> CommandResult {
+        let &mut (ref state, query) = params;
+
+        let player_list = query
+            .into_iter()
+            .map(|(_, identity)| {
+                let Some(ref player_name) = identity.name else {
+                    return Err("player entity does not have a name");
+                };
+
+                Ok(match self {
+                    ListCommand::Normal => player_name.clone(),
+                    ListCommand::Uuid => format!("{player_name} ({})", identity.uuid),
+                })
+            })
+            .collect::<Result<Vec<String>, _>>()?;
+
+        source.send_message(
+            format!(
+                "There are {} of a max of {} players online: {}",
+                player_list.len(),
+                state.0.config.max_players,
+                player_list.join(", "),
+            )
+            .into(),
+        );
+
+        Ok(())
+    }
+}