el_diablo/src/artifacts.rs

use crate::position::Position;
use crate::player::Player;

pub trait Artifact {
    //! An artifact that can be collected by the player
    /// get the position of the artifact in the level
    fn get_immutable_position(&self) -> &Position;
    /// call to apply the effects of the artifact to the player
    fn collect(&mut self, player: &mut Player);
}

pub struct Chest {
    /// a chest that contains some gold
    position: Position,
    gold: usize,
}

impl Chest {
    pub fn new(position: Position) -> Self {
        Self {
            position,
            gold: 10,
        }
    }
}

impl Artifact for Chest {
    fn get_immutable_position(&self) -> &Position { &self.position }
    fn collect(&mut self, player: &mut Player) {
        player.retrieve_gold(self.gold);
        self.gold = 0;
    }
}

pub struct Potion {
    /// a potion that restores some health
    position: Position,
    health: usize,
}

impl Potion {
    pub fn new(position: Position) -> Self {
        Self {
            position,
            health: 5,
        }
    }
}

impl Artifact for Potion {
    fn get_immutable_position(&self) -> &Position { &self.position }
    fn collect(&mut self, player: &mut Player) {
        player.change_life(self.health.try_into().unwrap());
        self.health = 0;
    }
}