package models

import "time"

// BeginningOfDay provides functionality.
func BeginningOfDay(t time.Time) time.Time {
	year, month, day := t.Date()
	return time.Date(year, month, day, 0, 0, 0, 0, t.Location())
}

// SetBit provides functionality.
// https://stackoverflow.com/questions/23192262/how-would-you-set-and-clear-a-single-bit-in-go
// Sets the bit at pos in the integer n.
func SetBit(n int, pos uint) int {
	n |= (1 << pos)
	return n
}

// ClearBit provides functionality.
// Clears the bit at pos in n.
func ClearBit(n int, pos uint) int {
	mask := ^(1 << pos)
	n &= mask
	return n
}

// HasBit provides functionality.
func HasBit(n int, pos uint) bool {
	val := n & (1 << pos)
	return (val > 0)
}