All files / src/lib/events chat.ts

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import { ChatMessageEvent } from "kick-api-types/payloads";
import { DbClient } from "../prisma";
import type { WebhookContext } from "../app/types";
import { sendOverlayMessage } from "../overlaySocket";
import { sendMessage } from "../functions/messages";
import { KickBroadcasterAuth } from "../functions/middleware";
import { ContentfulStatusCode } from "hono/utils/http-status";
 
/**
 * Processes incoming chat commands and responds when the payload starts with
 * the bot command prefix.
 */
export const chatHandler = async (
  event: ChatMessageEvent,
  _db: DbClient,
  ctx: WebhookContext
): Promise<Response> => {
  const content = event.content ?? "";
  const trimmedContent = content.trim();
  const username = (
    event.sender?.username ??
    event.broadcaster.username ??
    ""
  ).trim();
  const avatarUrl = await resolveAvatarUrl(
    username,
    event.sender?.profile_picture ?? undefined
  );
  const roomId = `overlay-chat-${event.broadcaster.user_id}`;
 
  console.log(
    `[Chat] Received message broadcaster=${event.broadcaster.username}[${
      event.broadcaster.user_id
    }] sender=${username || "<unknown>"} contentLength=${content.length}`
  );
 
  if (trimmedContent.length > 0) {
    const overlayOverrides = ctx.env.WS_URL
      ? {
          endpoint: ctx.env.WS_URL,
        }
      : undefined;
 
    console.debug(
      `[Chat] Forwarding overlay message room=${roomId} sender=${
        username || "<unknown>"
      }`
    );
    const overlayPayload = await sendOverlayMessage(
      {
        roomId,
        author: username,
        text: content,
        platform: "kick",
        avatarUrl,
      },
      overlayOverrides
    );
 
    if (!overlayPayload) {
      const displayName = username || "<unknown>";
      console.debug(
        `[Chat] Overlay relay not ready; skipped room=${roomId} sender=${displayName}`
      );
    }
  } else {
    console.debug(
      `[Chat] Ignoring blank message broadcaster=${event.broadcaster.user_id}`
    );
  }
 
  const prefix = "!";
 
  if (content.startsWith(prefix)) {
    const [command] = content.slice(prefix.length).trim().split(/\s+/);
    console.log(
      `[Chat] Command detected broadcaster=${event.broadcaster.username}[${
        event.broadcaster.user_id
      }] command=${command || "<none>"}`
    );
    if (!command) {
      return ctx.json({ ok: true }, { status: 200 });
    }
 
    if (command === "ping") {
      const broadcasterAuth = ctx.get(
        "kickBroadcasterAuth"
      ) as KickBroadcasterAuth | null;
      if (!broadcasterAuth) {
        console.error(
          `[event:${event.eventType}:error] Broadcaster ${event.broadcaster.username}[${event.broadcaster.user_id}] is not registered.`
        );
        return ctx.json(
          { message: "Broadcaster not registered" },
          { status: 404 }
        );
      }
 
      const message = "Pong!";
      const sent = await sendMessage({
        broadcaster: {
          name: event.broadcaster.username!,
          accessToken: broadcasterAuth.accessToken,
        },
        message,
      });
 
      if (sent.sent) {
        console.log("[Chat-Command] Message sent");
        return ctx.json(
          { message: sent.message },
          { status: sent.status as ContentfulStatusCode }
        );
      } else {
        console.log("[Chat-Command] Message not sent");
        return ctx.json(
          { message: sent.message },
          { status: sent.status as ContentfulStatusCode }
        );
      }
    } else {
      console.debug(
        `[Chat] Unknown command ignored broadcaster=${event.broadcaster.user_id} command=${command}`
      );
    }
  }
 
  return ctx.json({ ok: true }, { status: 200 });
};
 
type AvatarLookupResponse = {
  profile_pic?: string | null;
  user?: string | null;
};
 
const resolveAvatarUrl = async (
  username: string,
  fallback?: string
): Promise<string | undefined> => {
  const trimmedUsername = username.trim();
  if (!trimmedUsername) {
    return sanitizeAvatar(fallback);
  }
 
  const requestUrl = `https://api.stream-stuff.com/kickpfp.php?streamer=${encodeURIComponent(
    trimmedUsername
  )}`;
 
  try {
    const response = await fetch(requestUrl, {
      method: "GET",
      headers: { accept: "application/json" },
    });
 
    if (!response.ok) {
      console.warn(
        `[Chat] Avatar lookup failed streamer=${trimmedUsername} status=${response.status}`
      );
      return sanitizeAvatar(fallback);
    }
 
    const payload = (await response.json()) as AvatarLookupResponse;
    return sanitizeAvatar(payload.profile_pic) ?? sanitizeAvatar(fallback);
  } catch (error) {
    console.error(
      `[Chat] Avatar lookup errored streamer=${trimmedUsername}`,
      error
    );
    return sanitizeAvatar(fallback);
  }
};
 
const sanitizeAvatar = (value?: string | null): string | undefined => {
  if (typeof value !== "string") {
    return undefined;
  }
  const trimmed = value.trim();
  return trimmed.length > 0 ? trimmed : undefined;
};