main.go

package main

import (
	"flag"
	"fmt"
	"os"
	"time"

	"github.com/thedevsaddam/ponjika"
)

func main() {
	now := time.Now()
	p := ponjika.New(now)
	mnthTotalDys := p.TotalDays
	crntDate := p.Date
	crntDateIndx := int(now.Weekday())
	frstDateIndx := firstDayIndex(crntDate, crntDateIndx)

	calender := [6][7]int{}

	row := 0
	col := frstDateIndx
	for i := 1; i <= mnthTotalDys; i++ {
		calender[row][col] = i

		col = col + 1
		if col > 6 {
			row = row + 1
			col = 0
		}
	}

	isPh := flag.Bool("p", false, "show bengali calendar in english phonetic")
	flag.Parse()

	if *isPh {
		heading := fmt.Sprintf("\t%s %s", p.BengaliMonth.Phonetic, p.BengaliYear.Phonetic)
		fmt.Println(bold(heading))
		phoneticBengaliCalendar(calender, crntDate)
		os.Exit(0)
	}
	heading := fmt.Sprintf("\t     %s %s", p.BengaliMonth.Bengali, p.BengaliYear.Bengali)
	fmt.Println(bold(heading))
	bengaliCalender(calender, crntDate)
}

func bengaliCalender(calender [6][7]int, today int) {
	fmt.Println("রবি   সোম   মঙ্গল  বুধ   বৃহ   শুক্র   শনি")
	for i := 0; i < len(calender); i++ {
		for j := 0; j < 7; j++ {
			dt := calender[i][j]
			if dt != 0 {
				if dt > 9 {
					if dt == today {
						fmt.Print(highlight(enToBnNumber(dt)), "   ")
					} else {
						fmt.Print(enToBnNumber(dt), "   ")
					}
				} else {
					if dt == today {
						fmt.Print(highlight(enToBnNumber(dt)), "    ")
					} else {
						fmt.Print(enToBnNumber(dt), "    ")
					}
				}
			} else {
				fmt.Print("     ")
			}
		}
		fmt.Println()
	}
}

func phoneticBengaliCalendar(calender [6][7]int, today int) {
	fmt.Println("Su  Mo  Tu  We  Th  Fr  Sa")
	for i := 0; i < len(calender); i++ {
		for j := 0; j < 7; j++ {
			dt := calender[i][j]
			if dt != 0 {
				if dt > 9 {
					if dt == today {
						fmt.Print(highlight(fmt.Sprintf("%d", dt)), "  ")
					} else {
						fmt.Print(dt, "  ")
					}
				} else {
					if dt == today {
						fmt.Print(highlight(fmt.Sprintf("%d", dt)), "   ")
					} else {
						fmt.Print(dt, "   ")
					}
				}
			} else {
				fmt.Print("   ")
			}
		}
		fmt.Println()
	}
}

// firstDayIndex return the months first day index
func firstDayIndex(date, dateIndex int) int {
	position := (date - 1) % 7
	offset := dateIndex - position

	return ((offset + 7) % 7)
}

// enToBnNumber covert english number to bengali number String
func enToBnNumber(d int) string {
	var o string
	ds := fmt.Sprintf("%v", d)
	bdmap := map[string]string{
		"1": "১",
		"2": "২",
		"3": "৩",
		"4": "৪",
		"5": "৫",
		"6": "৬",
		"7": "৭",
		"8": "৮",
		"9": "৯",
		"0": "০",
	}
	for i := 0; i < len(ds); i++ {
		o += bdmap[string(ds[i])]
	}
	return o
}

func highlight(in string) string {
	lg := "\033[1;32m" // light green
	nc := "\033[0m"
	return fmt.Sprintf("%s%s%s", lg, in, nc)
}

func bold(in string) string {
	bld := "\033[1m" // bold
	nb := "\033[0m"
	return fmt.Sprintf("%s%s%s", bld, in, nb)
}