refactor(helpers): separate functions into files (#667)

* refactor(helpers): separate functions into files

* idk

* idk

src/helpers/emojis/get_emoji.ts

@@ -0,0 +1,32 @@
+import { cacheHandlers } from "../../cache.ts";
+import { RequestManager } from "../../rest/request_manager.ts";
+import { Emoji, Errors } from "../../types/mod.ts";
+import { endpoints } from "../../util/constants.ts";
+
+/**
+ * Returns an emoji for the given guild and emoji ID.
+ *
+ * ⚠️ **If you need this, you are probably doing something wrong. Always use cache.guilds.get()?.emojis
+ */
+export async function getEmoji(
+  guildID: string,
+  emojiID: string,
+  addToCache = true,
+) {
+  const result = (await RequestManager.get(
+    endpoints.GUILD_EMOJI(guildID, emojiID),
+  )) as Emoji;
+
+  if (addToCache) {
+    const guild = await cacheHandlers.get("guilds", guildID);
+    if (!guild) throw new Error(Errors.GUILD_NOT_FOUND);
+    guild.emojis.set(result.id ?? result.name, result);
+    cacheHandlers.set(
+      "guilds",
+      guildID,
+      guild,
+    );
+  }
+
+  return result;
+}