regorganizing and attempting to allow rehydration

src/services/caches/messages.ts

@@ -0,0 +1,42 @@
+import { fromDiscord } from "../../types/common";
+import { Message, type MessagePayload } from "../../types/message";
+import type { API } from "../api";
+import type { Client } from "../client";
+import type { Processor } from "../processor";
+import { ObjectCache } from "./cache";
+
+
+export class Messages extends ObjectCache<Message, MessagePayload> {
+    constructor (protected client: Client, api: API, processor: Processor) {
+        super(api, processor, 'message', Message, ['MESSAGE_CREATE', 'MESSAGE_UPDATE']);
+    }
+
+    async fetch(channel_id: string, message_id: string): Promise<MessagePayload> {
+        if (this.requests.has(message_id)) {
+            return this.requests.get(message_id)!;
+        } else {
+            // Dispatch the request
+            const req = this.api.get(`/channels/${channel_id}/messages/${message_id}`).then((data) => {
+                const message = Message[fromDiscord](data);
+                this.cache.set(message_id, message);
+                return message;
+            });
+            // Save the request
+            this.requests.set(message_id, req);
+            // Remove the request from the cache if it succeeds
+            req.then(() => this.requests.delete(message_id));
+            // Remove the request from the cache if it fails
+            req.catch(() => this.requests.delete(message_id));
+            // Return the request
+            return req;
+        }
+    }
+
+    async get(channel_id: string, message_id: string): Promise<MessagePayload> {
+        if (this.cache.has(message_id)) {
+            return await Promise.resolve(this.cache.get(message_id)!);
+        } else {
+            return this.fetch(channel_id, message_id);
+        }
+    }
+}