ProgressBar-Methods-Implementation.go

package main

import (
	"fmt"
	"math"
	"strings"
)

type PBar struct {
	LastDifference int
	Difference     int
	Design         []string
	MaxSize        int
	Length         int
}



func (p *PBar) Init()  {
	p.Design = append(p.Design,"▏", "▍", "▌", "▋", "▊", "▉" )
	p.MaxSize = 100 / 8
}

func (p *PBar) Start(length int) {
	p.Init()
	p.Length = length / 8
}

func(p *PBar) Increment(add int, status bool) string{
	p.Difference = p.LastDifference
	p.Difference = add / 8
	if status{
		return p.Status()
	}
	return ""
}

func (p *PBar) Status() string {
	var c float64
	if p.Difference == 0{
		c = 0
	}else{
		c = math.Round(float64(p.Difference * 100 / p.Length))
	}
	c = math.Min(math.Max(c, 0), 100)
	cFull := c / 8
	cPart :=  int(c) % 8 - 1
	str := strings.Repeat("█", int(cFull))
	if cPart >= 0{
		str += p.Design[int64(cPart)]
	}
	str += strings.Repeat("", p.MaxSize-int(cFull))
	str = fmt.Sprintf("[%-12v]", str)
	return str
}