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|
use specs::{
Entities,
ReadStorage,
WriteStorage,
System,
Join,
Write,
Read
};
use crate::{
components::{
Controller,
Position,
Inventory,
AttackInbox,
AttackMessage,
AttackType,
Flags
},
resources::{NewEntities, Ground, RoomPermissions},
item::ItemAction::{None, Build, Eat, Equip},
controls::Control,
};
pub struct Use;
impl <'a> System<'a> for Use {
type SystemData = (
Entities<'a>,
ReadStorage<'a, Controller>,
ReadStorage<'a, Position>,
WriteStorage<'a, Inventory>,
Write<'a, NewEntities>,
WriteStorage<'a, AttackInbox>,
Write<'a, Ground>,
ReadStorage<'a, Flags>,
Read<'a, RoomPermissions>
);
fn run(&mut self, (entities, controllers, positions, mut inventories, mut new, mut attacked, mut ground, flags, roompermissions): Self::SystemData) {
for (ent, controller, position, inventory) in (&entities, &controllers, &positions, &mut inventories).join(){
if let Control::Use(rank) = &controller.control {
if let Some(entry) = inventory.items.get_mut(*rank) {
match &entry.item.action {
Build(template, required_flags, blocking_flags) => {
let ground_flags = ground.flags_on(position.pos, &flags);
if roompermissions.build && required_flags.is_subset(&ground_flags) && blocking_flags.is_disjoint(&ground_flags){
new.create(position.pos, &template).unwrap();
inventory.items.remove(*rank);
}
}
Eat(health_diff) => {
AttackInbox::add_message(&mut attacked, ent, AttackMessage{typ: AttackType::Heal(*health_diff), attacker: Option::None});
inventory.items.remove(*rank);
}
Equip(equippable) => {
if entry.is_equipped {
inventory.items[*rank].is_equipped = false;
} else {
let slot = equippable.slot;
for otherentry in inventory.items.iter_mut() {
if let Equip(other) = &otherentry.item.action {
if other.slot == slot {
otherentry.is_equipped = false;
}
}
}
inventory.items[*rank].is_equipped = true;
}
ground.changes.insert(position.pos);
}
None => {}
}
}
}
}
}
}
|
