add gamemode

src/command/gamemode.rs

@@ -0,0 +1,26 @@
+#[derive(Default)]
+pub struct GamemodeCommand {
+    gamemode: Option<super::Gamemode>,
+    target: Option<super::Selector>
+}
+
+impl GamemodeCommand {
+    pub fn gamemode(mut self, gamemode: super::Gamemode) -> Self {
+        self.gamemode = Some(gamemode);
+        self
+    }
+
+    pub fn target(mut self, target: super::Selector) -> Self {
+        self.target = Some(target);
+        self
+    }
+
+    pub fn build(self) -> super::Command {
+        let gamemode = self.gamemode.unwrap_or(super::Gamemode::Survival);
+        let mut s = format!("defaultgamemode {gamemode}");
+        if let Some(target) = self.target {
+            s.push_str(&format!(" {target}"))
+        }
+        super::Command(s)
+    }
+}

src/command/mod.rs

@@ -71,6 +71,7 @@ mod defaultgamemode;
 mod op;
 mod deop;
 mod difficulty;
+mod gamemode;
 
 impl Command {
     pub fn raw(cmd: &str) -> Self {
@@ -116,4 +117,8 @@ impl Command {
     pub fn difficulty() -> difficulty::DifficultyCommand {
         difficulty::DifficultyCommand::default()
     }
+
+    pub fn gamemode() -> gamemode::GamemodeCommand {
+        gamemode::GamemodeCommand::default()
+    }
 }