fix(api): send stickers through webhooks (#2338)

fluxer_api/src/api/channel/services/message/MessageSendService.ts

@@ -1176,6 +1176,7 @@ export class MessageSendService {
 			embeds: data.embeds,
 			attachments: this.attachmentsToProcess(data.attachments),
 			attachmentUploadUserId: this.resolveWebhookAttachmentUploadUserId(webhook, data.attachments),
+			stickerIds: data.sticker_ids ? data.sticker_ids.flatMap((stickerId) => createStickerID(stickerId)) : undefined,
 			messageReference,
 			messageSnapshots,
 			guildId: channel.guildId,

fluxer_api/src/api/webhook/tests/WebhookStickerBypass.test.ts

@@ -7,7 +7,7 @@ import {type ApiTestHarness, createApiTestHarness} from '../../test/ApiTestHarne
 import {createBuilderWithoutAuth} from '../../test/TestRequestBuilder';
 import {createWebhook, deleteWebhook} from './WebhookTestUtils';
 
-describe('Webhook sticker bypass', () => {
+describe('Webhook stickers', () => {
 	let harness: ApiTestHarness;
 	beforeAll(async () => {
 		harness = await createApiTestHarness();
@@ -15,7 +15,7 @@ describe('Webhook sticker bypass', () => {
 	beforeEach(async () => {
 		await harness.reset();
 	});
-	it('webhook messages ignore sticker_ids', async () => {
+	it('rejects unknown sticker_ids', async () => {
 		const user = await createTestAccount(harness);
 		const guild = await createGuild(harness, user.token, 'Webhook Sticker Test Guild');
 		const channelId = guild.system_channel_id!;
@@ -26,7 +26,7 @@ describe('Webhook sticker bypass', () => {
 				content: 'Webhook sticker test',
 				sticker_ids: ['999999999999999999'],
 			})
-			.expect(204)
+			.expect(400)
 			.execute();
 		await deleteWebhook(harness, webhook.id, user.token);
 	});