feat(CDN): guild member avatars (#68)

packages/rest/__tests__/CDN.test.ts

@@ -52,6 +52,22 @@ test('emoji gif', () => {
 	expect(cdn.emoji(id, 'gif')).toBe(`${base}/emojis/${id}.gif`);
 });
 
+test('guildMemberAvatar default', () => {
+	expect(cdn.guildMemberAvatar(id, id, hash)).toBe(`${base}/guilds/${id}/users/${id}/avatars/${hash}.png`);
+});
+
+test('guildMemberAvatar dynamic-animated', () => {
+	expect(cdn.guildMemberAvatar(id, id, animatedHash, { dynamic: true })).toBe(
+		`${base}/guilds/${id}/users/${id}/avatars/${animatedHash}.gif`,
+	);
+});
+
+test('guildMemberAvatar dynamic-not-animated', () => {
+	expect(cdn.guildMemberAvatar(id, id, hash, { dynamic: true })).toBe(
+		`${base}/guilds/${id}/users/${id}/avatars/${hash}.png`,
+	);
+});
+
 test('icon default', () => {
 	expect(cdn.icon(id, hash)).toBe(`${base}/icons/${id}/${hash}.png`);
 });

packages/rest/src/lib/CDN.ts

@@ -93,6 +93,26 @@ export class CDN {
 		return this.makeURL(`/emojis/${emojiId}`, { extension });
 	}
 
+	/**
+	 * Generates a guild member avatar URL.
+	 * @param guildId The id of the guild
+	 * @param userId The id of the user
+	 * @param iconHash The hash provided by Discord for this avatar
+	 * @param options Optional options for the avatar
+	 */
+	public guildMemberAvatar(
+		guildId: string,
+		userId: string,
+		avatarHash: string,
+		{ dynamic = false, ...options }: ImageURLOptions = {},
+	): string {
+		if (dynamic && avatarHash.startsWith('a_')) {
+			options.extension = 'gif';
+		}
+
+		return this.makeURL(`/guilds/${guildId}/users/${userId}/avatars/${avatarHash}`, options);
+	}
+
 	/**
 	 * Generates an icon URL, e.g. for a guild.
 	 * @param id The id that has the icon splash