feat!: Item processing

- Added try_insert_item system
- Added rotated field on Item
- Implemented UI item drawing with scale and rotation

BREAKING CHANGE: Item.swap_size renamed to Item.rotate
    Item.clone_swapped renamed to Item.clone_rotated

src/inventory/ui.rs

@@ -1,8 +1,11 @@
+use std::f32::consts::FRAC_PI_2;
+
 use bevy::prelude::*;
 
-use crate::{inventory::{ActiveInventory, Inventory}, ui::{UiRoot, WindowSize}};
+use crate::{inventory::{ActiveInventory, Inventory, item::Item}, ui::{UiRoot, WindowSize}};
 
 const UI_SLOT_ASSET_PATH: &'static str = "sprites/ui/inventory_slot.png";
+const TEMP_ITEM_PATH: &'static str = "sprites/items/choco_bar.png";
 
 #[derive(Component)]
 #[require(Node)]
@@ -12,6 +15,10 @@ pub struct UiInventory;
 #[require(Node, ImageNode)]
 pub struct UiInventorySlot(UVec2);
 
+#[derive(Component)]
+#[require(Node, ImageNode)]
+pub struct UiItem(Entity);
+
 fn ui_inventory_bundle(inventory: &Inventory, window_size: &Res<WindowSize>) -> impl Bundle {
     let window_ratio = window_size.aspect_ratio();
     let (width, height) = {
@@ -37,7 +44,7 @@ fn ui_inventory_bundle(inventory: &Inventory, window_size: &Res<WindowSize>) ->
     )
 }
 
-fn inventory_slot_bundle(x: u32, y: u32, width: u32, height: u32, image: Handle<Image>) -> impl Bundle {
+fn inventory_slot_bundle(x: u32, y: u32, image: Handle<Image>) -> impl Bundle {
     (
         UiInventorySlot(UVec2::new(x, y)),
         ImageNode {
@@ -50,15 +57,54 @@ fn inventory_slot_bundle(x: u32, y: u32, width: u32, height: u32, image: Handle<
             height: percent(100.),
             grid_column: GridPlacement::start(x as i16 + 1),
             grid_row: GridPlacement::start(y as i16 + 1),
+            align_items: AlignItems::Start,
             ..default()
         },
     )
 }
 
+fn ui_item_bundle(item: &Item, item_entity: Entity, image: Handle<Image>) -> impl Bundle {
+    let (left, top, min_width, min_height, ui_transform) = match item.rotated {
+        true => (
+            percent(100.),
+            percent(-100.),
+            percent(100. * item.size.y as f32),
+            percent(100. * item.size.x as f32),
+            UiTransform::from_rotation(Rot2::radians(-FRAC_PI_2)),
+        ),
+        false => (
+            auto(),
+            auto(),
+            percent(100. * item.size.x as f32),
+            percent(100. * item.size.y as f32),
+            UiTransform::default(),
+        ),
+    };
+    (
+        UiItem(item_entity),
+        ImageNode {
+            image,
+            image_mode: NodeImageMode::Stretch,
+            ..default()
+        },
+        Node {
+            left,
+            top,
+            min_width,
+            min_height,
+            ..default()
+        },
+        BackgroundColor(Color::hsla(0., 0., 0., 0.5)),
+        ui_transform,
+        GlobalZIndex(1),
+    )
+}
+
 pub fn setup_ui_inventory(
     mut commands: Commands,
     asset_server: Res<AssetServer>,
     inventory_query: Query<(&Inventory, Option<&Children>), With<ActiveInventory>>,
+    item_query: Query<&Item>,
     root_query: Query<Entity, With<UiRoot>>,
     window_size: Res<WindowSize>,
 ) {
@@ -67,14 +113,31 @@ pub fn setup_ui_inventory(
         return;
     };
     let ui_slot_image: Handle<Image> = asset_server.load(UI_SLOT_ASSET_PATH);
-    for (inventory, _children) in inventory_query {
+    let temp_item_image: Handle<Image> = asset_server.load(TEMP_ITEM_PATH);
+    for (inventory, children) in inventory_query {
+        let items = match children {
+            Some(children) => {
+                children.iter().filter_map(|item_entity| {
+                    match item_query.get(item_entity) {
+                        Ok(item) => Some((item, item_entity)),
+                        Err(err) => {
+                            warn!("Error querying item {item_entity}: {err}");
+                            None
+                        },
+                    }
+                }).collect::<Vec<(&Item, Entity)>>()
+            }
+            None => Vec::new(),
+        };
         let inventory_entity = commands.spawn(ui_inventory_bundle(inventory, &window_size))
             .with_children(|commands| {
-                for x in 0..inventory.size.x {
-                    for y in 0..inventory.size.y {
-                        commands.spawn(inventory_slot_bundle(x, y, inventory.size.x, inventory.size.y, ui_slot_image.clone()));
+                for x in 0..inventory.size.x { for y in 0..inventory.size.y {
+                    let mut slot_commands = commands.spawn(inventory_slot_bundle(x, y, ui_slot_image.clone()));
+                    if let Some((item, entity)) = items.iter()
+                        .find(|(i, _)| i.position.unwrap_or_default() == UVec2::new(x, y)) {
+                        slot_commands.with_child(ui_item_bundle(item, *entity, temp_item_image.clone()));
                     }
-                }
+                } }
             }).id();
         commands.entity(root).add_child(inventory_entity);