22 lines
684 B
TypeScript
22 lines
684 B
TypeScript
export const calculateItemPosition = (
|
|
positionBefore: number | null = null,
|
|
positionAfter: number | null = null,
|
|
): number => {
|
|
if (positionBefore === null) {
|
|
if (positionAfter === null) {
|
|
return 0
|
|
}
|
|
|
|
// If there is no task after it, we just add 2^16 to the last position to have enough room in the future
|
|
return positionAfter / 2
|
|
}
|
|
|
|
// If there is no task after it, we just add 2^16 to the last position to have enough room in the future
|
|
if (positionAfter === null) {
|
|
return positionBefore + Math.pow(2, 16)
|
|
}
|
|
|
|
// If we have both a task before and after it, we actually calculate the position
|
|
return positionBefore + (positionAfter - positionBefore) / 2
|
|
}
|