120 lines
4.2 KiB
Rust
120 lines
4.2 KiB
Rust
use ::specs::prelude::*;
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use crate::components::{
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CursedItem, EquipmentChanged, Equippable, Equipped, IdentifiedItem, InBackpack, Name,
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WantsToUseItem,
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};
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use crate::gamelog;
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pub struct ItemEquipOnUse {}
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impl<'a> System<'a> for ItemEquipOnUse {
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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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Entities<'a>,
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WriteStorage<'a, WantsToUseItem>,
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ReadStorage<'a, Name>,
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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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WriteStorage<'a, EquipmentChanged>,
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WriteStorage<'a, IdentifiedItem>,
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ReadStorage<'a, CursedItem>,
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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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entities,
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mut wants_use,
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names,
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equippable,
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mut equipped,
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mut backpack,
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mut dirty,
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mut identified_item,
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cursed,
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) = data;
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let mut remove_use = Vec::new();
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for (target, useitem) in (&entities, &wants_use).join() {
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// If it is equippable, then we want to equip it --
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// and un-equip whatever else was in that slot
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if let Some(can_equip) = equippable.get(useitem.item) {
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let target_slot = can_equip.slot;
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// Remove any items the target has in the item's slot
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let mut can_equip = true;
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let mut to_unequip = Vec::new();
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for (item_entity, already_equipped, name) in (&entities, &equipped, &names).join() {
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if already_equipped.owner == target && already_equipped.slot == target_slot {
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if cursed.get(item_entity).is_some() {
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gamelog::line("You cannot un-equip")
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.item_name(&name.name)
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.append("- it is cursed!")
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.log();
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can_equip = false;
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} else {
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to_unequip.push(item_entity);
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if target == *player_entity {
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gamelog::line("You un-equip").item_name(&name.name).log();
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}
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}
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}
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}
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if can_equip {
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// Identify the item
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if target == *player_entity {
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identified_item
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.insert(
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target,
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IdentifiedItem {
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name: names.get(useitem.item).unwrap().name.clone(),
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},
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)
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.expect("Unable to identify item.");
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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 move equipped item to 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("Unable to equip item");
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backpack.remove(useitem.item);
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if target == *player_entity {
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gamelog::line("You equip")
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.item_name(&names.get(useitem.item).unwrap().name)
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.log();
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}
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}
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// Done with item
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remove_use.push(target);
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}
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}
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remove_use.iter().for_each(|e| {
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dirty
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.insert(*e, EquipmentChanged {})
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.expect("Unable to insert EquipmentChanged tag");
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wants_use
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.remove(*e)
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.expect("Failed to remove WantsToUseItem tag");
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})
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}
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}
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