Add GameEvent

src/game.rs

@@ -10,6 +10,34 @@ pub struct GameModel {
     room: Room,
 }
 
+pub enum GameEvent {
+    Quit,
+    Nop,
+    MovePlayer(V2<isize>),
+}
+
+impl GameEvent {
+    fn from_crossterm(event: Event) -> Self {
+        if let Event::Key(key_event) = event {
+            use KeyCode::Char;
+            match key_event.code {
+                Char('q') => return GameEvent::Quit,
+                Char('j') => return GameEvent::MovePlayer(V2::new(0, 1)),
+                Char('k') => return GameEvent::MovePlayer(V2::new(0, -1)),
+                Char('h') => return GameEvent::MovePlayer(V2::new(-1, 0)),
+                Char('l') => return GameEvent::MovePlayer(V2::new(1, 0)),
+                Char('J') => return GameEvent::MovePlayer(V2::new(0, 2)),
+                Char('K') => return GameEvent::MovePlayer(V2::new(0, -2)),
+                Char('H') => return GameEvent::MovePlayer(V2::new(-2, 0)),
+                Char('L') => return GameEvent::MovePlayer(V2::new(2, 0)),
+                _ => (),
+            }
+        }
+
+        GameEvent::Nop
+    }
+}
+
 struct Room {
     size: V2<usize>,
 }
@@ -25,39 +53,14 @@ impl GameModel {
     }
 
     pub fn update(self, event: Event) -> Option<Self> {
-        match event {
-            Event::Key(key_event) => match key_event.code {
-                KeyCode::Char('q') => return None,
-                KeyCode::Char('j') => {
-                    return Some(Self {
-                        player_pos: self.player_pos + V2::new(0, 1),
+        match GameEvent::from_crossterm(event) {
+            GameEvent::Quit => None,
+            GameEvent::Nop => Some(self),
+            GameEvent::MovePlayer(direction) => Some(Self {
+                player_pos: self.player_pos + direction,
                 ..self
-                    })
-                },
-                KeyCode::Char('k') => {
-                    return Some(Self {
-                        player_pos: self.player_pos + V2::new(0, -1),
-                        ..self
-                    })
-                },
-                KeyCode::Char('h') => {
-                    return Some(Self {
-                        player_pos: self.player_pos + V2::new(-1, 0),
-                        ..self
-                    })
-                },
-                KeyCode::Char('l') => {
-                    return Some(Self {
-                        player_pos: self.player_pos + V2::new(1, 0),
-                        ..self
-                    })
-                },
-                _ => (),
-            },
-            _ => (),
+            }),
         }
-
-        Some(self)
     }
 
     pub fn render(&self, frame: &mut Frame) {
@@ -117,6 +120,7 @@ impl Tile {
                 cell.set_symbol("⚱").set_fg(Color::LightRed);
             }
             Tile::Frog => {
+                // Alternative symbol: Ö̶͈
                 cell.set_symbol("ä̃").set_fg(Color::Green);
             }
         }