434 lines
15 KiB
Rust
434 lines
15 KiB
Rust
use crate::components::*;
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use crate::{game_log::GameLog, particle_system::ParticleBuilder, Map, RunState};
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use rltk::RGB;
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use specs::prelude::*;
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pub struct ItemCollectionSystem {}
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impl<'a> System<'a> for ItemCollectionSystem {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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ReadExpect<'a, Entity>,
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WriteExpect<'a, GameLog>,
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WriteStorage<'a, WantsToPickupItem>,
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WriteStorage<'a, Position>,
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ReadStorage<'a, Name>,
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WriteStorage<'a, InBackpack>,
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);
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fn run(&mut self, data: Self::SystemData) {
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let (player_entity, mut gamelog, mut wants_pickup, mut positions, names, mut backpack) =
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data;
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for pickup in wants_pickup.join() {
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positions.remove(pickup.item);
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backpack
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.insert(
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pickup.item,
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InBackpack {
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owner: pickup.collected_by,
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},
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)
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.expect("Failed to add item to backpack");
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if pickup.collected_by == *player_entity {
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gamelog.append(format!(
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"You pick up the {}.",
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names.get(pickup.item).unwrap().name
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));
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}
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}
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wants_pickup.clear();
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}
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}
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pub struct ItemUseSystem {}
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impl<'a> System<'a> for ItemUseSystem {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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ReadExpect<'a, Entity>,
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WriteExpect<'a, GameLog>,
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WriteExpect<'a, Map>,
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Entities<'a>,
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WriteStorage<'a, WantsToUseItem>,
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ReadStorage<'a, Name>,
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ReadStorage<'a, Consumable>,
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ReadStorage<'a, ProvidesHealing>,
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ReadStorage<'a, InflictsDamage>,
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WriteStorage<'a, CombatStats>,
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WriteStorage<'a, SufferDamage>,
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ReadStorage<'a, AreaOfEffect>,
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WriteStorage<'a, Confusion>,
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ReadStorage<'a, Equippable>,
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WriteStorage<'a, Equipped>,
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WriteStorage<'a, InBackpack>,
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WriteExpect<'a, ParticleBuilder>,
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ReadStorage<'a, Position>,
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ReadStorage<'a, ProvidesFood>,
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WriteStorage<'a, HungerClock>,
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ReadStorage<'a, MagicMapper>,
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WriteExpect<'a, RunState>,
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);
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#[allow(clippy::cognitive_complexity)]
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fn run(&mut self, data: Self::SystemData) {
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let (
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player_entity,
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mut gamelog,
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map,
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entities,
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mut wants_use,
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names,
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consumables,
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healing,
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inflict_damage,
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mut combat_stats,
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mut suffer_damage,
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aoe,
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mut confused,
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equippable,
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mut equipped,
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mut backpack,
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mut particle_builder,
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positions,
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provides_food,
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mut hunger_clocks,
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magic_mapper,
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mut runstate,
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) = data;
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for (entity, useitem) in (&entities, &wants_use).join() {
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let mut used_item = true;
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// Targeting
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let mut targets: Vec<Entity> = Vec::new();
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match useitem.target {
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None => {
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targets.push(*player_entity);
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}
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Some(target) => {
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match aoe.get(useitem.item) {
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None => {
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// Single target in tile
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let idx = map.xy_idx(target.x, target.y);
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for mob in map.tile_content[idx].iter() {
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targets.push(*mob);
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}
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}
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Some(area_effect) => {
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// AoE
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let mut blast_tiles =
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rltk::field_of_view(target, area_effect.radius, &*map);
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blast_tiles.retain(|p| {
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p.x > 0 && p.x < map.width - 1 && p.y > 0 && p.y < map.height - 1
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});
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for tile_idx in blast_tiles.iter() {
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let idx = map.xy_idx(tile_idx.x, tile_idx.y);
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for mob in map.tile_content[idx].iter() {
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targets.push(*mob);
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}
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particle_builder.request(
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tile_idx.x,
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tile_idx.y,
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RGB::named(rltk::ORANGE),
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RGB::named(rltk::BLACK),
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rltk::to_cp437('░'),
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200.0,
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);
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}
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}
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}
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}
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}
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// If it is equippable, then we want to equip it - and unequip whatever else was in that slot
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match equippable.get(useitem.item) {
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None => {}
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Some(can_equip) => {
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let target_slot = can_equip.slot;
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let target = targets[0];
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// Remove any items the target has in the item's slot
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let mut to_unequip: Vec<Entity> = Vec::new();
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for (item_entity, already_equipped, name) in
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(&entities, &equipped, &names).join()
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{
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if already_equipped.owner == target && already_equipped.slot == target_slot
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{
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to_unequip.push(item_entity);
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if target == *player_entity {
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gamelog.append(format!("You unequip {}.", name.name));
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}
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}
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}
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for item in to_unequip.iter() {
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equipped.remove(*item);
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backpack
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.insert(*item, InBackpack { owner: target })
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.expect("Unable to put unequipped item back in backpack");
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}
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// Wield the item
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equipped
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.insert(
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useitem.item,
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Equipped {
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owner: target,
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slot: target_slot,
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},
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)
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.expect("Failed to equip item");
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backpack.remove(useitem.item);
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if target == *player_entity {
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gamelog.append(format!(
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"You equip {}.",
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names.get(useitem.item).unwrap().name
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));
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}
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}
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}
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// If it is edible, eat it!
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match provides_food.get(useitem.item) {
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None => {}
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Some(_) => {
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used_item = true;
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let target = targets[0];
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if let Some(hc) = hunger_clocks.get_mut(target) {
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hc.state = HungerState::WellFed;
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hc.duration = 20;
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gamelog.append(format!(
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"You eat the {}.",
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names.get(useitem.item).unwrap().name
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));
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}
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}
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}
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// If its a magic mapper...
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match magic_mapper.get(useitem.item) {
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None => {}
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Some(_) => {
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used_item = true;
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gamelog.append("The map is revealed to you!");
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*runstate = RunState::MagicMapReveal { row: 0 };
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}
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}
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// If the item heals, apply the healing
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match healing.get(useitem.item) {
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None => {}
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Some(healer) => {
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used_item = false;
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for target in targets.iter() {
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if let Some(stats) = combat_stats.get_mut(*target) {
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stats.hp = i32::min(stats.max_hp, stats.hp + healer.heal_amount);
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if entity == *player_entity {
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gamelog.append(format!(
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"You drink the {}, healing {} hp.",
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names.get(useitem.item).unwrap().name,
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healer.heal_amount
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));
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}
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used_item = true;
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// Visually show healing
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if let Some(pos) = positions.get(*target) {
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particle_builder.request(
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pos.x,
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pos.y,
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RGB::named(rltk::GREEN),
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RGB::named(rltk::BLACK),
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rltk::to_cp437('♥'),
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200.0,
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);
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}
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}
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}
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}
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}
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// If it inflicts damage, apply it to the target cell
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match inflict_damage.get(useitem.item) {
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None => {}
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Some(damage) => {
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used_item = false;
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for mob in targets.iter() {
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SufferDamage::new_damage(&mut suffer_damage, *mob, damage.damage);
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if entity == *player_entity {
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let mob_name = names.get(*mob).unwrap();
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let item_name = names.get(useitem.item).unwrap();
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gamelog.append(format!(
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"You use {} on {}, inflicting {} hp.",
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item_name.name, mob_name.name, damage.damage
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));
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if let Some(pos) = positions.get(*mob) {
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particle_builder.request(
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pos.x,
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pos.y,
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RGB::named(rltk::RED),
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RGB::named(rltk::BLACK),
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rltk::to_cp437('‼'),
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200.0,
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);
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}
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}
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used_item = true;
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}
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}
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}
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// Can it pass along confusion? Note the use of scopes
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// to escape from the borrow checker!
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let mut add_confusion = Vec::new();
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{
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match confused.get(useitem.item) {
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None => {}
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Some(confusion) => {
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used_item = false;
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for mob in targets.iter() {
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add_confusion.push((*mob, confusion.turns));
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if entity == *player_entity {
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let mob_name = names.get(*mob).unwrap();
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let item_name = names.get(useitem.item).unwrap();
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gamelog.append(format!(
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"You use {} on {}, confusing them.",
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item_name.name, mob_name.name
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));
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if let Some(pos) = positions.get(*mob) {
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particle_builder.request(
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pos.x,
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pos.y,
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RGB::named(rltk::MAGENTA),
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RGB::named(rltk::BLACK),
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rltk::to_cp437('?'),
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200.0,
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);
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}
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}
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}
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}
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}
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}
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for mob in add_confusion.iter() {
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confused
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.insert(mob.0, Confusion { turns: mob.1 })
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.expect("Unable to add confused status");
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}
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// If it's a consumable, delete it on use
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if used_item {
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let consumable = consumables.get(useitem.item);
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match consumable {
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None => {}
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Some(_) => {
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entities
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.delete(useitem.item)
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.expect("Failed to consume item");
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}
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}
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}
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}
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wants_use.clear();
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}
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}
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pub struct ItemDropSystem {}
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impl<'a> System<'a> for ItemDropSystem {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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ReadExpect<'a, Entity>,
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WriteExpect<'a, GameLog>,
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Entities<'a>,
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WriteStorage<'a, WantsToDropItem>,
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ReadStorage<'a, Name>,
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WriteStorage<'a, Position>,
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WriteStorage<'a, InBackpack>,
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);
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fn run(&mut self, data: Self::SystemData) {
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let (
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player_entity,
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mut gamelog,
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entities,
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mut wants_drop,
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names,
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mut positions,
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mut backpack,
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) = data;
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for (entity, to_drop) in (&entities, &wants_drop).join() {
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let mut dropper_pos: Position = Position { x: 0, y: 0 };
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{
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let dropped_pos = positions.get(entity).unwrap();
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dropper_pos.x = dropped_pos.x;
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dropper_pos.y = dropped_pos.y;
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}
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positions
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.insert(
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to_drop.item,
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Position {
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x: dropper_pos.x,
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y: dropper_pos.y,
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},
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)
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.expect("Unable to drop item to position");
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backpack.remove(to_drop.item);
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if entity == *player_entity {
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gamelog.append(format!(
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"You drop the {}.",
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names.get(to_drop.item).unwrap().name
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));
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}
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}
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wants_drop.clear();
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}
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}
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pub struct ItemRemoveSystem {}
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impl<'a> System<'a> for ItemRemoveSystem {
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#[allow(clippy::type_complexity)]
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type SystemData = (
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Entities<'a>,
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WriteStorage<'a, WantsToRemoveItem>,
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WriteStorage<'a, Equipped>,
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WriteStorage<'a, InBackpack>,
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);
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fn run(&mut self, data: Self::SystemData) {
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let (entities, mut wants_remove, mut equipped, mut backpack) = data;
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for (entity, to_remove) in (&entities, &wants_remove).join() {
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equipped.remove(to_remove.item);
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backpack
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.insert(to_remove.item, InBackpack { owner: entity })
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.expect("Unable to remove item and put in backpack");
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}
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wants_remove.clear();
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}
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}
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