follow and cross post endpoints support

src/constants/discord.ts

@@ -45,6 +45,10 @@ export const endpoints = {
     `${baseEndpoints.BASE_URL}/channels/${id}/messages/${messageID}/reactions`,
   CHANNEL_MESSAGE_REACTION: (id: string, messageID: string, emoji: string) =>
     `${baseEndpoints.BASE_URL}/channels/${id}/messages/${messageID}/reactions/${emoji}`,
+  CHANNEL_FOLLOW: (id: string) =>
+    `${baseEndpoints.BASE_URL}/channels/${id}/followers`,
+  CHANNEL_MESSAGE_CROSSPOST: (id: string, messageID: string) =>
+    `${baseEndpoints.BASE_URL}/channels/${id}/messages/${messageID}/crosspost`,
 
   // Guild Endpoints
   GUILD: (id: string) => `${GUILDS_BASE(id)}`,

src/handlers/channel.ts

@@ -17,6 +17,7 @@ import {
   MessageContent,
   CreateInviteOptions,
   ChannelEditOptions,
+  FollowedChannelPayload,
 } from "../types/channel.ts";
 import { logYellow } from "../utils/logger.ts";
 
@@ -340,3 +341,24 @@ export function editChannel(channel: Channel, options: ChannelEditOptions) {
     payload,
   );
 }
+
+/** Follow a News Channel to send messages to a target channel. Requires the `MANAGE_WEBHOOKS` permission in the target channel. Returns the webhook id. */
+export async function followChannel(
+  sourceChannelID: string,
+  targetChannelID: string,
+) {
+  if (
+    !botHasChannelPermissions(targetChannelID, [Permissions.MANAGE_WEBHOOKS])
+  ) {
+    throw new Error(Errors.MISSING_MANAGE_CHANNELS);
+  }
+
+  const data = await RequestManager.post(
+    endpoints.CHANNEL_FOLLOW(sourceChannelID),
+    {
+      webhook_channel_id: targetChannelID,
+    },
+  ) as FollowedChannelPayload;
+
+  return data.webhook_id;
+}

src/handlers/message.ts

@@ -223,3 +223,11 @@ export async function editMessage(
   );
   return createMessage(result as MessageCreateOptions);
 }
+
+export async function publishMessage(channelID: string, messageID: string) {
+  const data = await RequestManager.post(
+    endpoints.CHANNEL_MESSAGE_CROSSPOST(channelID, messageID),
+  ) as MessageCreateOptions;
+
+  return createMessage(data);
+}

src/types/channel.ts

@@ -146,3 +146,10 @@ export interface CreateInviteOptions {
   /** If true, don't try to reuse a similar invite (useful for creating many unique one time use invites.) */
   unique: boolean;
 }
+
+export interface FollowedChannelPayload {
+  /** The source channel id */
+  channel_id: string;
+  /** The webhook id */
+  webhook_id: string;
+}