Function getIdMap

packages/2d/src/lib/utils/diff.ts:34–52

(list: T[])

}

function getIdMap<T extends Idable>(list: T[]) {
  const map = new Map<string, TransformDiffItem<T>[]>();
  let before: T | undefined = undefined;
  for (const [index, current] of list.entries()) {
    const currentArray = map.get(current.id) ?? [];
    if (!map.has(current.id)) {
      map.set(current.id, currentArray);
    }

    currentArray.push({
      before,
      current,
      beforeIdIndex: before ? map.get(before.id)!.length - 1 : -1,
      currentIndex: index,
    });
    before = current;
  }
  return map;
}

export function getTransformDiff<T extends Idable>(
  from: T[],