hunger system

src/hunger_system.rs

@@ -0,0 +1,82 @@
+use super::{gamelog, HungerClock, HungerState, RunState, SufferDamage};
+use specs::prelude::*;
+
+pub struct HungerSystem {}
+
+impl<'a> System<'a> for HungerSystem {
+    #[allow(clippy::type_complexity)]
+    type SystemData = (
+        Entities<'a>,
+        WriteStorage<'a, HungerClock>,
+        ReadExpect<'a, Entity>,
+        ReadExpect<'a, RunState>,
+        WriteStorage<'a, SufferDamage>,
+    );
+
+    fn run(&mut self, data: Self::SystemData) {
+        let (entities, mut hunger_clock, player_entity, runstate, mut inflict_damage) = data;
+
+        for (entity, mut clock) in (&entities, &mut hunger_clock).join() {
+            let mut proceed = false;
+
+            match *runstate {
+                RunState::PlayerTurn => {
+                    if entity == *player_entity {
+                        proceed = true;
+                    }
+                }
+                RunState::MonsterTurn => {
+                    if entity != *player_entity {
+                        proceed = true;
+                    }
+                }
+                _ => proceed = false,
+            }
+
+            if !proceed {
+                return;
+            }
+            clock.duration -= 1;
+            if clock.duration > 0 {
+                return;
+            }
+
+            match clock.state {
+                HungerState::Satiated => {
+                    clock.state = HungerState::Normal;
+                    clock.duration = 300;
+                    if entity == *player_entity {
+                        gamelog::Logger::new().append("You are no longer satiated.").log();
+                    }
+                }
+                HungerState::Normal => {
+                    clock.state = HungerState::Hungry;
+                    clock.duration = 100;
+                    if entity == *player_entity {
+                        gamelog::Logger::new().colour(rltk::RED).append("You feel hungry.").log();
+                    }
+                }
+                HungerState::Hungry => {
+                    clock.state = HungerState::Weak;
+                    clock.duration = 50;
+                    if entity == *player_entity {
+                        gamelog::Logger::new().colour(rltk::RED).append("You feel weak with hunger.").log();
+                    }
+                }
+                HungerState::Weak => {
+                    clock.state = HungerState::Fainting;
+                    clock.duration = 50;
+                    if entity == *player_entity {
+                        gamelog::Logger::new().colour(rltk::RED).append("You feel hungry enough to faint.").log();
+                    }
+                }
+                HungerState::Fainting => {
+                    SufferDamage::new_damage(&mut inflict_damage, entity, 1);
+                    if entity == *player_entity {
+                        gamelog::Logger::new().colour(rltk::RED).append("You can't go on without food...").log();
+                    }
+                }
+            }
+        }
+    }
+}