discordeno/packages/plugins/validations/src/applicationCommandOptions.ts

import { ApplicationCommandOption, ApplicationCommandOptionTypes, Bot } from '../deps.js'

export function validateApplicationCommandOptions (bot: Bot, options: ApplicationCommandOption[]) {
  const requiredOptions: ApplicationCommandOption[] = []
  const optionalOptions: ApplicationCommandOption[] = []

  for (const option of options) {
    option.name = option.name.toLowerCase()

    if (option.choices?.length) {
      if (option.choices.length > 25) throw new Error('Too many application command options provided.')

      if (
        option.type !== ApplicationCommandOptionTypes.String && option.type !== ApplicationCommandOptionTypes.Integer
      ) {
        throw new Error('Only string or integer options can have choices.')
      }
    }

    if (!bot.utils.validateLength(option.name, { min: 1, max: 32 })) {
      throw new Error('Invalid application command option name.')
    }

    if (!bot.utils.validateLength(option.description, { min: 1, max: 100 })) {
      throw new Error('Invalid application command description.')
    }

    option.choices?.every((choice) => {
      if (!bot.utils.validateLength(choice.name, { min: 1, max: 100 })) {
        throw new Error('Invalid application command option choice name. Must be between 1-100 characters long.')
      }

      if (
        option.type === ApplicationCommandOptionTypes.String &&
        (typeof choice.value !== 'string' || choice.value.length < 1 || choice.value.length > 100)
      ) {
        throw new Error('Invalid slash options choice value type.')
      }

      if (option.type === ApplicationCommandOptionTypes.Integer && typeof choice.value !== 'number') {
        throw new Error('A number must be set for Integer types.')
      }
    })

    if (option.required) {
      requiredOptions.push(option)
      continue
    }

    optionalOptions.push(option)
  }

  return [...requiredOptions, ...optionalOptions]
}