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import * as chalk from 'chalk'
import type { ProgressConfig } from '../interfaces/interfaces'
import { Printer } from './printer'
export class ProgressBar extends Printer<ProgressBar> {
private DEFAULT_CONFIG: Partial<ProgressConfig> = {
barLength: 100,
showNumeric: false,
steps: 50,
}
private config: ProgressConfig | undefined
public constructor(stdio: NodeJS.WriteStream) {
super(stdio)
}
protected stop(): ProgressBar {
this.config = undefined
return this
}
private static calcNumeric(config: ProgressConfig, percent: number): string {
const steps: number = config.steps as number
const fracture = Math.round(percent * steps).toString().padStart(steps.toString().length, ' ')
return `(${fracture}/${steps}${config.unit ? (' ' + config.unit) : ''})`
}
private setConfig(config: ProgressConfig): ProgressBar {
this.config = {
...this.DEFAULT_CONFIG,
...config,
}
return this
}
private checkForComplete(config: ProgressConfig, percent: number): ProgressBar {
return percent === 1
? this.clearLine()
.deleteLastLine()
.write(this.SUCCESS_FN(config.success))
.stop()
.newline()
: this
}
protected self(): ProgressBar {
return this
}
public start(config: ProgressConfig): ProgressBar {
return this.stop()
.setConfig(config)
.write(config.start)
.newline()
.fraction(0)
}
public fraction(fraction: number): ProgressBar {
if (!this.config) {
return this
}
const barLength: number = this.config.barLength as number
const doneAmount = Math.floor(barLength * fraction)
const restAmount = barLength - doneAmount
return this.clearLine()
.write(`[${chalk.bgWhite(' ').repeat(doneAmount)}${chalk.grey('.').repeat(restAmount)}]${this.config.showNumeric ? ProgressBar.calcNumeric(this.config, fraction) : ''}`)
.checkForComplete(this.config, fraction)
}
}
export const progress = new ProgressBar(process.stdout)
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