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

* refactor(helpers): separate functions into files

* idk

* idk

src/handlers/members/GUILD_MEMBER_REMOVE.ts

@@ -0,0 +1,18 @@
+import { eventHandlers } from "../../bot.ts";
+import { DiscordPayload, GuildBanPayload } from "../../types/mod.ts";
+import { cacheHandlers } from "../../cache.ts";
+
+export async function handleGuildMemberRemove(data: DiscordPayload) {
+  const payload = data.d as GuildBanPayload;
+  const guild = await cacheHandlers.get("guilds", payload.guild_id);
+  if (!guild) return;
+
+  guild.memberCount--;
+  const member = await cacheHandlers.get("members", payload.user.id);
+  eventHandlers.guildMemberRemove?.(guild, payload.user, member);
+
+  member?.guilds.delete(guild.id);
+  if (member && !member.guilds.size) {
+    await cacheHandlers.delete("members", member.id);
+  }
+}