declarative_ui.rs

pub trait UiCommand: std::fmt::Debug + 'static {
	fn write(&self, commands: &mut Commands);
}

#[derive(Default, Debug)]
pub struct UiNode {
	queue: Vec<Box<dyn UiCommand>>,
	children: UiTree,
}

impl UiNode {
	pub fn with_children(&mut self, f: impl FnOnce(&mut UiTree)) -> &mut Self {
		f(&mut self.children);

		self
	}
}

#[derive(Debug)]
pub struct ShowUiBundle<T: Bundle> {
	pub id: String,
	pub bundle: T,
}

impl<T: Bundle + Clone + std::fmt::Debug> UiCommand for ShowUiBundle<T> {
	fn write(&self, commands: &mut Commands) {
		println!("spawning {:?}", self.bundle);
		commands.spawn_bundle(self.bundle.clone());
	}
}

#[derive(Default, Debug)]
pub struct UiTree(HashMap<String, UiNode>);

impl UiTree {
	pub fn show_bundle<T: Bundle + std::fmt::Debug + Clone>(
		&mut self,
		id: String,
		bundle: T,
	) -> &mut UiNode {
		let mut node = UiNode::default();
		node.queue.push(Box::new(ShowUiBundle {
			id: id.clone(),
			bundle,
		}));

		self.0.insert(id.clone(), node);

		self.0.get_mut(&id).unwrap()
	}

	pub fn render(&mut self, commands: &mut Commands) {
		for (id, node) in self.0.iter_mut() {
			for command in node.queue.iter_mut() {
				command.write(commands);
			}
			node.children.render(commands);
		}
	}
}

pub fn show_info_panels(
	mut commands: Commands,
	fonts: Res<GameFonts>,
	turn: Res<TurnData>,
	menu_assets: Res<MenuAssets>,
) {
	let mut ui = UiTree::default();

	ui.show_bundle(
		"container".to_string(),
		NodeBundle {
			color: Color::NONE.into(),
			style: Style {
				flex_direction: FlexDirection::ColumnReverse,
				align_items: AlignItems::FlexStart,

				justify_content: JustifyContent::FlexStart,
				..Default::default()
			},
			..Default::default()
		},
	)
	.with_children(|parent| {
		parent.show_bundle(
			"day_text".to_string(),
			TextBundle {
				text: Text::with_section(
					format!("Day {}", turn.day).to_string(),
					TextStyle {
						font: fonts.main.clone(),
						font_size: 24.0,
						color: Color::BLACK,
					},
					Default::default(),
				),
				..Default::default()
			},
		);
		// .insert(DayText);
		parent
			.show_bundle(
				"team_text".to_string(),
				TextBundle {
					text: Text::with_section(
						format!("{:?}'s turn", turn.team).to_string(),
						TextStyle {
							font: fonts.main.clone(),
							font_size: 24.0,
							color: match turn.team {
								Team::Red => Color::RED,
								Team::Blue => Color::BLUE,
							},
						},
						Default::default(),
				..Default::default()
			},
		);
			)
			// .insert(TeamText);
	});

	println!("{:#?}", ui);

	ui.render(&mut commands);

	// let content_entity = commands
	// 	.spawn_bundle(NodeBundle {
	// 		color: Color::NONE.into(),
	// 		style: Style {
	// 			flex_direction: FlexDirection::ColumnReverse,
	// 			align_items: AlignItems::FlexStart,

	// 			justify_content: JustifyContent::FlexStart,
	// 			..Default::default()
	// 		},
	// 		..Default::default()
	// 	})
	// 	.with_children(|parent| {
	// 		parent
	// 			.spawn_bundle(TextBundle {
	// 				text: Text::with_section(
	// 					format!("Day {}", turn.day).to_string(),
	// 					TextStyle {
	// 						font: fonts.main.clone(),
	// 						font_size: 24.0,
	// 						color: Color::BLACK,
	// 					},
	// 					Default::default(),
	// 				),
	// 				..Default::default()
	// 			})
	// 			.insert(DayText);
	// 		parent
	// 			.spawn_bundle(TextBundle {
	// 				text: Text::with_section(
	// 					format!("{:?}'s turn", turn.team).to_string(),
	// 					TextStyle {
	// 						font: fonts.main.clone(),
	// 						font_size: 24.0,
	// 						color: match turn.team {
	// 							Team::Red => Color::RED,
	// 							Team::Blue => Color::BLUE,
	// 						},
	// 					},
	// 					Default::default(),
	// 				),
	// 				..Default::default()
	// 			})
	// 			.insert(TeamText);
	// 	})
	// 	.id();
	// commands
	// 	.spawn_bundle(NinePatchBundle {
	// 		style: Style {
	// 			margin: Rect::all(Val::Auto),
	// 			justify_content: JustifyContent::Center,
	// 			align_items: AlignItems::Center,
	// 			size: Size::new(Val::Px(100.0), Val::Px(80.0)),
	// 			position_type: PositionType::Absolute,
	// 			position: Rect {
	// 				left: Val::Px(16.0),
	// 				right: Val::Undefined,
	// 				top: Val::Px(16.0),
	// 				bottom: Val::Undefined,
	// 			},
	// 			..Default::default()
	// 		},
	// 		nine_patch_data: NinePatchData::with_single_content(
	// 			menu_assets.nine_patch_texture.clone(),
	// 			menu_assets.nine_patch.clone(),
	// 			content_entity,
	// 		),
	// 		..Default::default()
	// 	})
	// 	.insert(TurnInfoPanel);
}