example_test.go

// Copyright © 2020 Danila Petrunko. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package rdate_test

import (
	"fmt"
	"time"

	"github.com/petrunkodg/rdate"
)

func Example_time() {
	ts := time.Date(2020, 8, 11, 0, 2, 1, 6, time.UTC)

	t, ok := rdate.NewTime(ts, "start prev week")
	if !ok {
		fmt.Println("the shortcut doesn't exist")
	}

	fmt.Println(t)

	// If you are sure the shortcut exists, you don't need to check ok.
	// you can just use RequireTime.
	t = rdate.RequireTime(ts, rdate.TimeStartOfPrevMonth)
	fmt.Println(t)

	t = rdate.RequireTime(ts, rdate.TimeEndOfPrevYear)
	fmt.Println(t)

	// Output:
	// 2020-08-03 00:00:00
	// 2020-07-01 00:00:00
	// 2019-12-31 23:59:59
}

func Example_period() {
	ts := time.Date(2020, 8, 11, 0, 2, 1, 6, time.UTC)

	p, ok := rdate.NewPeriod(ts, "prev week")
	if !ok {
		fmt.Println("the shortcut doesn't exist")
	}
	fmt.Println(p)

	p = rdate.RequirePeriod(ts, rdate.PeriodPrevQuart)
	fmt.Println(p)

	p = rdate.RequirePeriod(ts, rdate.PeriodThisMonth)
	fmt.Println(p)

	// Output:
	// 2020-08-03 00:00:00 — 2020-08-09 23:59:59
	// 2020-04-01 00:00:00 — 2020-06-30 23:59:59
	// 2020-08-01 00:00:00 — 2020-08-31 23:59:59
}