/**
* Given an array of items with IDs and a selection range,
* returns a new selection object that includes all items in the range.
*
* @param items - Array of items, each with an `id` property
* @param lastSelectedIndex - The index of the previously selected item (anchor point)
* @param currentIndex - The index of the currently clicked item
* @param currentSelection - The current selection state
* @returns A new selection object with all items in the range selected
*/
export function addRangeToSelection<T extends { id: string }>(
items: T[],
lastSelectedIndex: number,
currentIndex: number,
currentSelection: Record<string, boolean>
): Record<string, boolean> {
const start = Math.min(lastSelectedIndex, currentIndex);
const end = Math.max(lastSelectedIndex, currentIndex);
const itemsToSelect = items.slice(start, end + 1);
const newSelection = { ...currentSelection };
itemsToSelect.forEach((item) => {
newSelection[item.id] = true;
});
return newSelection;
}
