don't move into self

battlesnake/src/logic.rs

@@ -15,7 +15,7 @@ use rand::seq::SliceRandom;
 use serde_json::{json, Value};
 use std::collections::HashMap;
 
-use crate::{Battlesnake, Board, Game};
+use crate::{Battlesnake, Board, Coord, Game};
 
 // info is called when you create your Battlesnake on play.battlesnake.com
 // and controls your Battlesnake's appearance
@@ -88,7 +88,30 @@ pub fn get_move(_game: &Game, turn: i32, board: &Board, you: &Battlesnake) -> Va
     }
 
     // TODO: Step 2 - Prevent your Battlesnake from colliding with itself
-    // let my_body = &you.body;
+    if you.body.contains(&Coord {
+        x: my_head.x - 1,
+        y: my_head.y,
+    }) {
+        is_move_safe.insert("left", false);
+    }
+    if you.body.contains(&Coord {
+        x: my_head.x + 1,
+        y: my_head.y,
+    }) {
+        is_move_safe.insert("right", false);
+    }
+    if you.body.contains(&Coord {
+        x: my_head.x,
+        y: my_head.y - 1,
+    }) {
+        is_move_safe.insert("down", false);
+    }
+    if you.body.contains(&Coord {
+        x: my_head.x,
+        y: my_head.y + 1,
+    }) {
+        is_move_safe.insert("up", false);
+    }
 
     // TODO: Step 3 - Prevent your Battlesnake from colliding with other Battlesnakes
     // let opponents = &board.snakes;

battlesnake/src/main.rs

@@ -43,7 +43,7 @@ pub struct Battlesnake {
     shout: Option<String>,
 }
 
-#[derive(Deserialize, Serialize, Debug)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy,Deserialize, Serialize)]
 pub struct Coord {
     x: i32,
     y: i32,