add function for resolving stickers for future use

src/webpage/sticker.ts

@@ -81,6 +81,30 @@ class Sticker extends SnowFlake {
 		}
 		return undefined;
 	}
+	static emojiMap = new WeakMap<Localuser, Map<string, Sticker | void>>();
+	static async lookupEmoji(id: string, localuser: Localuser): Promise<Sticker | void> {
+		const guild = localuser.guilds.find((guild) => guild.emojis.find((emoji) => emoji.id === id));
+		if (guild) {
+			const sticker = guild.stickers.find((_) => _.id === id);
+			if (sticker) return sticker;
+		}
+
+		const map = this.emojiMap.get(localuser) || new Map();
+		this.emojiMap.set(localuser, map);
+
+		if (map.has(id)) return map.get(id);
+
+		const res = await fetch(localuser.info.api + `/stickers/${id}`, {
+			headers: localuser.headers,
+		});
+		if (res.status === 403) {
+			map.set(id, undefined);
+			return undefined;
+		}
+		const json = (await res.json()) as stickerJson;
+		map.set(id, json);
+		return new Sticker(json, localuser);
+	}
 	static async stickerPicker(x: number, y: number, localuser: Localuser): Promise<Sticker> {
 		let res: (r: Sticker) => void;
 		this;