import type { ChangeRecord } from "~/shared/types/schedule";

export function applyChange<T extends { id: string }>(change: ChangeRecord<T>, data: T[]) {
	const index = data.findIndex(item => item.id === change.data.id);
	if (change.op === "del") {
		if (index !== -1)
			data.splice(index, 1);
	} else if (change.op === "set") {
		if (index !== -1)
			data.splice(index, 1, change.data);
		else
			data.push(change.data)
	}
}

export function applyChangeArray<T extends { id: string }>(changes: ChangeRecord<T>[], data: T[]) {
	// Note: quadratic complexity due to findIndex in applyChange
	for (const change of changes) {
		applyChange(change, data);
	}
}