console-app/lib/Sources/ArgSource.ts

/*
 * Copyright (C) Sapphirecode - All Rights Reserved
 * This file is part of console-app which is released under MIT.
 * See file 'LICENSE' for full license details.
 * Created by Timo Hocker <timo@scode.ovh>, May 2020
 */

/* eslint-disable no-console */
/* eslint-disable no-process-exit */
import yargs, { Options } from 'yargs';
import { Option, OptionValue } from '../Option';
import { OptionSource } from './OptionSource';

export class ArgSource extends OptionSource {
  private create_config (
    config: Option,
    persistent_type: string
  ): Record<string, Options> {
    return {
      [config.name]: {
        alias:    config.alias,
        // eslint-disable-next-line no-undefined
        default:  undefined,
        type:    persistent_type
      }
    } as Record<string, Options>;
  }

  public async parse (opt: Option, val: OptionValue): Promise<void> {
    const yargs_config = this.create_config (
      opt,
      val.type_validation.persistent_type
    );

    const argv = yargs.options (yargs_config)
      .parse ();

    if (typeof argv[opt.name] === 'undefined')
      return;

    if (
      val.type_validation.option_type === 'array'
        && (argv[opt.name] as Array<unknown>)
          .filter ((v) => typeof v !== 'undefined').length <= 0
    )
      return;

    await val.assign_arg (opt, argv[opt.name]);
  }
}