roguelike-game/src/gui/inventory_menu.rs

use ::rltk::prelude::*;
use ::specs::prelude::*;

use super::{get_item_display_name, item_result_menu, ItemMenuResult};
use crate::components::InBackpack;
use crate::State;

pub fn show_inventory(gs: &mut State, ctx: &mut Rltk) -> (ItemMenuResult, Option<Entity>) {
    let mut draw_batch = DrawBatch::new();

    let player_entity = gs.ecs.fetch::<Entity>();
    let backpack = gs.ecs.read_storage::<InBackpack>();
    let entities = gs.ecs.entities();

    let mut items: Vec<(Entity, String)> = Vec::new();
    (&entities, &backpack)
        .join()
        .filter(|item| item.1.owner == *player_entity)
        .for_each(|item| items.push((item.0, get_item_display_name(&gs.ecs, item.0))));

    let result = item_result_menu(&mut draw_batch, "Inventory", items.len(), &items, ctx.key);

    draw_batch
        .submit(6000)
        .expect("Failed to batch render Inventory Menu");

    result
}