move slice elements to certain position

silceElementsMove.go

func sliceToMap(slice []string) map[string]interface{} {
	res := make(map[string]interface{}, len(slice))
	for _, v := range slice {
		res[v] = nil
	}
	return res
}

// move elements to the front of the element at index i of the slice
// if i >= len(originSlice), means move the elements to the end of slice
func MoveElementsToPosition(originSlice []string, elements []string, position int) []string {
	if position < 0 {
		return originSlice
	}

	elementsMap := sliceToMap(elements)
	newSlice := make([]string, len(originSlice))
	i := 0
	for idx, guid := range originSlice {
		if idx == position {
			for _, v := range elements {
				newSlice[i] = v
				i++
			}
			newSlice[i] = guid
			i++
			continue
		}

		if _, ok := elementsMap[guid]; ok {
			continue
		}
		newSlice[i] = guid
		i++
	}

	if position >= len(originSlice) {
		for _, v := range elements {
			newSlice[i] = v
			i++
		}
	}
	return newSlice
}