[WIP] Feature: add duplicate item

[nomorepanic]

Hello, I added a duplicate item button.

However, I can't find my way around generating a new item. How I am supposed to generate a new id for it?

[markmanx]

Hi @nomorepanic . Thanks for looking into this. At the moment you have to do two things to duplicate an item: 1) create a new modelItem and 2) create a new viewItem that references the modelItem. Concept-wise, this is not a great part of the codebase atm because it's a 1:1 relationship.

The idea was to eventually have 1:many relationship, where a modelItem would be a node template, and you could instantiate the template multiple times. This will be coming soon hopefully, so heads up, this will make the action of duplicating work very differently. It will work more like creating linked instances of the template (i.e. update one, update them all). In any case your code could still be useful if someone wanted an actual duplicate action.

See the following relevant snippet for how to place an icon.

isoflow/src/interaction/modes/PlaceIcon.ts

Lines 26 to 50 in 1800e2c

	mouseup: ({ uiState, scene }) => {
	if (uiState.mode.type !== 'PLACE_ICON') return;
	if (uiState.mode.id !== null) {
	const modelItemId = generateId();
	scene.createModelItem({
	id: modelItemId,
	name: 'Untitled',
	icon: uiState.mode.id
	});
	scene.createViewItem({
	...VIEW_ITEM_DEFAULTS,
	id: modelItemId,
	tile: uiState.mouse.position.tile
	});
	}
	uiState.actions.setMode(
	produce(uiState.mode, (draft) => {
	draft.id = null;
	})
	);
	}