add ban command

src/commands/ban.ts

@@ -0,0 +1,33 @@
+import moment, { unitOfTime } from 'moment';
+import { Message } 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.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);
+      if (!member) return message.channel.createMessage(`***${this.client.util.emojis.ERROR} Cannot find member.***`);
+      if (!this.client.util.moderation.checkPermissions(member, message.member)) return message.channel.createMessage(`***${this.client.util.emojis.ERROR} Permission denied.***`);
+      message.delete();
+
+      const lockLength = args[1].match(/[a-z]+|[^a-z]+/gi);
+      const length = Number(lockLength[0]);
+      const unit = lockLength[1] as unitOfTime.Base;
+      const momentMilliseconds = moment.duration(length, unit).asMilliseconds();
+      const reason = momentMilliseconds ? args.slice(2).join(' ') : args.slice(1).join(' ');
+      return await this.client.util.moderation.ban(member, message.member, momentMilliseconds, reason);
+    } catch (err) {
+      return this.client.util.handleError(err, message, this);
+    }
+  }
+}