feat(CDN): Support emoji size (#9787)

* feat(CDN): support emoji size

* refactor: try to warn in all environments

* feat: add prefix

* refactor: better feedback message

---------

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

packages/rest/src/lib/CDN.ts

@@ -8,6 +8,9 @@ import {
 	type ImageSize,
 	type StickerExtension,
 } from './utils/constants.js';
+import { deprecationWarning } from './utils/utils.js';
+
+let deprecationEmittedForEmoji = false;
 
 /**
  * The options used for image URLs
@@ -158,10 +161,38 @@ export class CDN {
 	 * Generates an emoji's URL for an emoji.
 	 *
 	 * @param emojiId - The emoji id
-	 * @param extension - The extension of the emoji
+	 * @param options - Optional options for the emoji
 	 */
-	public emoji(emojiId: string, extension?: ImageExtension): string {
+	public emoji(emojiId: string, options?: Readonly<BaseImageURLOptions>): string;
-		return this.makeURL(`/emojis/${emojiId}`, { extension });
+
+	/**
+	 * Generates an emoji's URL for an emoji.
+	 *
+	 * @param emojiId - The emoji id
+	 * @param extension - The extension of the emoji
+	 * @deprecated This overload is deprecated. Pass an object containing the extension instead.
+	 */
+	// eslint-disable-next-line @typescript-eslint/unified-signatures
+	public emoji(emojiId: string, extension?: ImageExtension): string;
+
+	public emoji(emojiId: string, options?: ImageExtension | Readonly<BaseImageURLOptions>): string {
+		let resolvedOptions;
+
+		if (typeof options === 'string') {
+			if (!deprecationEmittedForEmoji) {
+				deprecationWarning(
+					'Passing a string for the second parameter of CDN#emoji() is deprecated. Use an object instead.',
+				);
+
+				deprecationEmittedForEmoji = true;
+			}
+
+			resolvedOptions = { extension: options };
+		} else {
+			resolvedOptions = options;
+		}
+
+		return this.makeURL(`/emojis/${emojiId}`, resolvedOptions);
 	}
 
 	/**

packages/rest/src/lib/utils/constants.ts

@@ -59,3 +59,10 @@ export const OverwrittenMimeTypes = {
 } as const satisfies Readonly<Record<string, string>>;
 
 export const BurstHandlerMajorIdKey = 'burst';
+
+/**
+ * Prefix for deprecation warnings.
+ *
+ * @internal
+ */
+export const DEPRECATION_WARNING_PREFIX = 'DeprecationWarning' as const;

packages/rest/src/lib/utils/utils.ts

@@ -1,6 +1,7 @@
 import type { RESTPatchAPIChannelJSONBody, Snowflake } from 'discord-api-types/v10';
 import type { REST } from '../REST.js';
 import { RateLimitError } from '../errors/RateLimitError.js';
+import { DEPRECATION_WARNING_PREFIX } from './constants.js';
 import { RequestMethod, type RateLimitData, type ResponseLike } from './types.js';
 
 function serializeSearchParam(value: unknown): string | null {
@@ -140,3 +141,18 @@ export async function sleep(ms: number): Promise<void> {
 export function isBufferLike(value: unknown): value is ArrayBuffer | Buffer | Uint8Array | Uint8ClampedArray {
 	return value instanceof ArrayBuffer || value instanceof Uint8Array || value instanceof Uint8ClampedArray;
 }
+
+/**
+ * Irrespective environment warning.
+ *
+ * @remarks Only the message is needed. The deprecation prefix is handled already.
+ * @param message - A string the warning will emit with
+ * @internal
+ */
+export function deprecationWarning(message: string) {
+	if (typeof globalThis.process === 'undefined') {
+		console.warn(`${DEPRECATION_WARNING_PREFIX}: ${message}`);
+	} else {
+		process.emitWarning(message, DEPRECATION_WARNING_PREFIX);
+	}
+}