community-relations/src/commands/ban.ts

import moment, { unitOfTime } from 'moment';
import { Message, User } from 'eris';
import { Client, Command } from '../class';

export default class Ban extends Command {
  constructor(client: Client) {
    super(client);
    this.name = 'ban';
    this.description = 'Bans a member from the guild.';
    this.usage = 'ban <member> [time] [reason]';
    this.permissions = 2;
    this.guildOnly = true;
    this.enabled = true;
  }

  public async run(message: Message, args: string[]) {
    try {
      // @ts-ignore
      const member = this.client.util.resolveMember(args[0], message.channel.guild);
      let user: User;
      if (!member) {
        try {
          user = await this.client.getRESTUser(args[0]);
        } catch {
          return message.channel.createMessage(`***${this.client.util.emojis.ERROR} Cannot find user.***`);
        }
      }
      try {
        await this.client.guilds.get(this.client.config.guildID).getBan(args[0]);
        return message.channel.createMessage(`***${this.client.util.emojis.ERROR} This user is already banned.***`);
      } catch {
        // eslint-disable-next-line no-unused-expressions
        undefined;
      }
      if (member && !this.client.util.moderation.checkPermissions(member, message.member)) return message.channel.createMessage(`***${this.client.util.emojis.ERROR} Permission denied.***`);
      message.delete();

      let momentMilliseconds: number;
      let reason: string;
      if (args.length > 1) {
        const lockLength = args[1].match(/[a-z]+|[^a-z]+/gi);
        const length = Number(lockLength[0]);
        const unit = lockLength[1] as unitOfTime.Base;
        momentMilliseconds = moment.duration(length, unit).asMilliseconds();
        reason = momentMilliseconds ? args.slice(2).join(' ') : args.slice(1).join(' ');
      }
      await this.client.util.moderation.ban(user, message.member, momentMilliseconds, reason);
      return message.channel.createMessage(`***${this.client.util.emojis.SUCCESS} ${user.username}#${user.id} has been banned.***`);
    } catch (err) {
      return this.client.util.handleError(err, message, this, false);
    }
  }
}