add ping command

src/commands/impl/ping.ts

@@ -0,0 +1,40 @@
+import type { ChatMessage } from "@twurple/chat";
+import { calculateSecondsBetween } from "../../util/general.ts";
+import { logSuccess } from "../../util/logger.ts";
+import { BaseCommand } from "../base-command.ts";
+import type { ICommandRequirements } from "../interface.ts";
+
+export class PingCommand extends BaseCommand {
+  started: number;
+  constructor() {
+    super();
+    this.started = Date.now();
+  }
+
+  name = "ping";
+  cooldown = 0;
+  enabled = true;
+
+  requirements: ICommandRequirements = {
+    developer: false,
+    mod: false,
+  };
+
+  triggered = async (
+    channel: string,
+    user: string,
+    _text: string,
+    msg: ChatMessage,
+  ) => {
+    logSuccess(`${channel} ${user} ping command triggered`);
+    const uptime = getUptime(this.started, Date.now());
+    const message = `uptime: ${uptime}`;
+    this.chatClient.say(channel, message, {
+      replyTo: msg,
+    });
+  };
+}
+
+function getUptime(start: number, now: number): string {
+  return calculateSecondsBetween(start, now).toReadable();
+}