Add hunger

src/inventory_system.rs

@@ -1,12 +1,8 @@
 use specs::prelude::*;
 
+use crate::{AreaOfEffect, CombatStats, Confusion, Consumable, Equippable, Equipped, HungerClock, HungerState, InBackpack, InflictsDamage, Map, Name, Position, ProvidesFood, ProvidesHealing, Ranged, SufferDamage, WantsToDropItem, WantsToPickupItem, WantsToRemoveItem, WantsToUseItem};
 use crate::gamelog::GameLog;
 use crate::particle_system::ParticleBuilder;
-use crate::{
-    AreaOfEffect, CombatStats, Confusion, Consumable, Equippable, Equipped, InBackpack,
-    InflictsDamage, Map, Name, Position, ProvidesHealing, Ranged, SufferDamage, WantsToDropItem,
-    WantsToPickupItem, WantsToRemoveItem, WantsToUseItem,
-};
 
 pub struct ItemCollectionSystem {}
 
@@ -72,6 +68,8 @@ impl<'a> System<'a> for ItemUseSystem {
         WriteStorage<'a, InBackpack>,
         WriteExpect<'a, ParticleBuilder>,
         ReadStorage<'a, Position>,
+        ReadStorage<'a, ProvidesFood>,
+        WriteStorage<'a, HungerClock>,
     );
 
     fn run(&mut self, data: Self::SystemData) {
@@ -95,6 +93,8 @@ impl<'a> System<'a> for ItemUseSystem {
             mut backpack,
             mut particle_builder,
             positions,
+            provides_food,
+            mut hunger_clocks
         ) = data;
 
         for (entity, use_item) in (&entities, &wants_use).join() {
@@ -133,11 +133,21 @@ impl<'a> System<'a> for ItemUseSystem {
                                     200.,
                                 );
                             }
-
+                        }
                     }
                 }
             }
 
+            if let Some(item_edible) = provides_food.get(use_item.item) {
+                used_item = true;
+                let target = targets[0];
+                if let Some(hc) = hunger_clocks.get_mut(target) {
+                    hc.state = HungerState::WellFed;
+                    hc.duration = 20;
+                    game_log.entries.push(format!("You eat the {}.", names.get(use_item.item).unwrap().name));
+                }
+            }
+
             if let Some(item_equippable) = equippable.get(use_item.item) {
                 let target_slot = item_equippable.slot;
                 let target = targets[0];