Add turn skipping and healing on skipped turns

src/player.rs

@@ -1,5 +1,5 @@
 use crate::components::{
-    CombatStats, Item, Player, Position, Viewshed, WantsToMelee, WantsToPickupItem,
+    CombatStats, Item, Monster, Player, Position, Viewshed, WantsToMelee, WantsToPickupItem,
 };
 use crate::{game_log::GameLog, Map, RunState, State, TileType};
 use rltk::{Point, Rltk, VirtualKeyCode};
@@ -114,6 +114,9 @@ pub fn player_input(gs: &mut State, ctx: &mut Rltk) -> RunState {
                 }
             }
 
+            // Skip Turn
+            VirtualKeyCode::Numpad5 | VirtualKeyCode::Space => return skip_turn(&mut gs.ecs),
+
             _ => return RunState::AwaitingInput,
         },
     }
@@ -170,3 +173,33 @@ pub fn try_next_level(ecs: &mut World) -> bool {
         false
     }
 }
+
+fn skip_turn(ecs: &mut World) -> RunState {
+    let player_entity = ecs.fetch::<Entity>();
+    let viewshed_components = ecs.read_storage::<Viewshed>();
+    let monsters = ecs.read_storage::<Monster>();
+
+    let worldmap_resource = ecs.fetch::<Map>();
+
+    let mut can_heal = true;
+    let viewshed = viewshed_components.get(*player_entity).unwrap();
+    for tile in viewshed.visible_tiles.iter() {
+        let idx = worldmap_resource.xy_idx(tile.x, tile.y);
+        for entity_id in worldmap_resource.tile_content[idx].iter() {
+            match monsters.get(*entity_id) {
+                None => {}
+                Some(_) => {
+                    can_heal = false;
+                }
+            }
+        }
+    }
+
+    if can_heal {
+        let mut health_components = ecs.write_storage::<CombatStats>();
+        let player_hp = health_components.get_mut(*player_entity).unwrap();
+        player_hp.hp = i32::min(player_hp.hp + 1, player_hp.max_hp);
+    }
+
+    RunState::PlayerTurn
+}