Merge branch 'display-grid' into 'master'

Display grid

See merge request mhart/DancingDroids!45

src/main.rs

@@ -198,6 +198,34 @@ fn open_file(filename: &str) -> io::Result<String> {
     Ok(content)
 }
 
+/// Here we display the grid by looping in every position checking if it exists in the HashMap.
+fn display_grid(
+    w: &world::World,
+    robot_pool: &Vec<robot::Robot>,
+    h: &HashMap<robot::Position, u32>,
+) {
+    for i in (0..w.y).rev() {
+        print!("{}  ", i);
+        for j in 0..w.x {
+            match h.get(&robot::Position { x: j, y: i }) {
+                Some(id) => match robot_pool[(id - 1) as usize].o {
+                    robot::Orientation::N => print!("↑  "),
+                    robot::Orientation::E => print!("→  "),
+                    robot::Orientation::S => print!("↓  "),
+                    robot::Orientation::W => print!("←  "),
+                },
+
+                None => print!(".  "),
+            }
+        }
+        println!();
+    }
+    print!("   ");
+    for j in 0..w.x {
+        print!("{}  ", j);
+    }
+    println!();
+}
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // We handle CLI flags here.
     let matches = App::new("DancingDroids")
@@ -218,7 +246,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let world: world::World = parse_config(raw_conf, &mut robot_pool)?;
     let mut hash: HashMap<robot::Position, u32> = HashMap::new();
     create_hash_map(&robot_pool, &mut hash);
-
+    display_grid(&world, &robot_pool, &hash);
     loop {
         let mut piouff: u32 = 0;
         for r in &mut robot_pool {