SwitchbladeBot/switchblade

const Parameter = require('./Parameter.js')
const CommandError = require('../../CommandError.js')

const isNull = (n) => n === null || n === undefined || isNaN(n)

module.exports = class NumberParameter extends Parameter {
  static parseOptions (options = {}) {
    return {
      ...super.parseOptions(options),
      min: Number(options.min),
      max: Number(options.max),
      forceMin: !!options.forceMin,
      forceMax: !!options.forceMax
    }
  }

  static parse (arg, { t }) {
    if (!arg) return

    let nmb = Number(arg.replace(/%/g, ''))
    if (isNull(nmb)) throw new CommandError(t('errors:invalidNumber'), this.showUsage)
    if (!isNull(this.min) && nmb < this.min) {
      if (!this.forceMin) throw new CommandError(t('errors:needBiggerNumber', { number: this.min }))
      nmb = this.min
    }
    if (!isNull(this.max) && nmb > this.max) {
      if (!this.forceMax) throw new CommandError(t('errors:needSmallerNumber', { number: this.max }))
      nmb = this.max
    }

    return nmb
  }
}