feat(messages): add message caching and messageDelete event

src/gateway/handlers/index.ts

@@ -13,6 +13,7 @@ import { guildBanRemove } from './guildBanRemove.ts'
 import { messageCreate } from './messageCreate.ts'
 import { resume } from './resume.ts'
 import { reconnect } from './reconnect.ts'
+import { messageDelete } from "./messageDelete.ts"
 
 export const gatewayHandlers: {
   [eventCode in GatewayEvents]: GatewayEventHandler | undefined
@@ -42,7 +43,7 @@ export const gatewayHandlers: {
   INVITE_DELETE: undefined,
   MESSAGE_CREATE: messageCreate,
   MESSAGE_UPDATE: undefined,
-  MESSAGE_DELETE: undefined,
+  MESSAGE_DELETE: messageDelete,
   MESSAGE_DELETE_BULK: undefined,
   MESSAGE_REACTION_ADD: undefined,
   MESSAGE_REACTION_REMOVE: undefined,

src/gateway/handlers/messageCreate.ts

@@ -13,6 +13,7 @@ export const messageCreate: GatewayEventHandler = async (
   if (channel === undefined)
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
     channel = (await gateway.client.channels.fetch(d.channel_id)) as TextChannel
+  await channel.messages.set(d.id, d)
   const user = new User(gateway.client, d.author)
   await gateway.client.users.set(d.author.id, d.author)
   let guild

src/gateway/handlers/messageDelete.ts

@@ -0,0 +1,19 @@
+import { TextChannel } from '../../structures/textChannel.ts'
+import { MessageDeletePayload } from "../../types/gateway.ts"
+import { Gateway, GatewayEventHandler } from '../index.ts'
+
+export const messageDelete: GatewayEventHandler = async (
+  gateway: Gateway,
+  d: MessageDeletePayload
+) => {
+  let channel = await gateway.client.channels.get<TextChannel>(d.channel_id)
+  // Fetch the channel if not cached
+  if (channel === undefined)
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
+    channel = (await gateway.client.channels.fetch(d.channel_id)) as TextChannel
+
+  const message = await channel.messages.get(d.id)
+  if (message === undefined) return gateway.client.emit('messageDeleteUncached', d)
+  await channel.messages.delete(d.id)
+  gateway.client.emit('messageDelete', message)
+}

src/managers/messages.ts

@@ -7,8 +7,11 @@ import { CHANNEL_MESSAGE } from '../types/endpoint.ts'
 import { BaseManager } from './base.ts'
 
 export class MessagesManager extends BaseManager<MessagePayload, Message> {
-  constructor (client: Client) {
+  channel: TextChannel
+
+  constructor (client: Client, channel: TextChannel) {
     super(client, 'messages', Message)
+    this.channel = channel
   }
 
   async get (key: string): Promise<Message | undefined> {
@@ -26,18 +29,22 @@ export class MessagesManager extends BaseManager<MessagePayload, Message> {
     return res
   }
 
-  async fetch (channelID: string, id: string): Promise<Message> {
+  async set (key: string, value: MessagePayload): Promise<any> {
+    return this.client.cache.set(this.cacheName, key, value, this.client.messageCacheLifetime)
+  }
+
+  async fetch (id: string): Promise<Message> {
     return await new Promise((resolve, reject) => {
       this.client.rest
-        .get(CHANNEL_MESSAGE(channelID, id))
+        .get(CHANNEL_MESSAGE(this.channel.id, id))
         .then(async data => {
-          this.set(id, data as MessagePayload)
+          await this.set(id, data as MessagePayload)
 
           let channel: any = await this.client.channels.get<TextChannel>(
-            channelID
+            this.channel.id
           )
           if (channel === undefined)
-            channel = await this.client.channels.fetch(channelID)
+            channel = await this.client.channels.fetch(this.channel.id)
 
           const author = new User(this.client, (data as MessagePayload).author)
           await this.client.users.set(

src/models/cacheAdapter.ts

@@ -7,7 +7,7 @@ import {
 
 export interface ICacheAdapter {
   get: (cacheName: string, key: string) => Promise<any> | any
-  set: (cacheName: string, key: string, value: any) => Promise<any> | any
+  set: (cacheName: string, key: string, value: any, expire?: number) => Promise<any> | any
   delete: (cacheName: string, key: string) => Promise<boolean> | boolean
   array: (cacheName: string) => undefined | any[] | Promise<any[] | undefined>
   deleteCache: (cacheName: string) => any
@@ -24,13 +24,16 @@ export class DefaultCacheAdapter implements ICacheAdapter {
     return cache.get(key)
   }
 
-  async set (cacheName: string, key: string, value: any): Promise<any> {
+  async set(cacheName: string, key: string, value: any, expire?: number): Promise<any> {
     let cache = this.data[cacheName]
     if (cache === undefined) {
       this.data[cacheName] = new Collection()
       cache = this.data[cacheName]
     }
-    return cache.set(key, value)
+    cache.set(key, value)
+    if (expire !== undefined) setTimeout(() => {
+      cache.delete(key)
+    }, expire)
   }
 
   async delete(cacheName: string, key: string): Promise<boolean> {
@@ -55,6 +58,8 @@ export class RedisCacheAdapter implements ICacheAdapter {
   _redis: Promise<Redis>
   redis?: Redis
   ready: boolean = false
+  readonly _expireIntervalTimer: number = 5000
+  private _expireInterval?: number
 
   constructor(options: RedisConnectOptions) {
     this._redis = connect(options)
@@ -62,6 +67,7 @@ export class RedisCacheAdapter implements ICacheAdapter {
       redis => {
         this.redis = redis
         this.ready = true
+        this._startExpireInterval()
       },
       () => {
         // TODO: Make error for this
@@ -69,6 +75,26 @@ export class RedisCacheAdapter implements ICacheAdapter {
     )
   }
 
+  private _startExpireInterval(): void {
+    this._expireInterval = setInterval(() => {
+      this.redis?.scan(0, { pattern: '*:expires' }).then(([_, names]) => {
+        for (const name of names) {
+          this.redis?.hvals(name).then(vals => {
+            for (const val of vals) {
+              const expireVal: {
+                name: string,
+                key: string,
+                at: number
+              } = JSON.parse(val)
+              const expired = new Date().getTime() > expireVal.at
+              if (expired) this.redis?.hdel(expireVal.name, expireVal.key)
+            }
+          })
+        }
+      })
+    }, this._expireIntervalTimer)
+  }
+
   async _checkReady(): Promise<void> {
     if (!this.ready) await this._redis
   }
@@ -87,7 +113,8 @@ export class RedisCacheAdapter implements ICacheAdapter {
   async set(
     cacheName: string,
     key: string,
-    value: any
+    value: any,
+    expire?: number
   ): Promise<number | undefined> {
     await this._checkReady()
     const result = await this.redis?.hset(
@@ -95,6 +122,13 @@ export class RedisCacheAdapter implements ICacheAdapter {
       key,
       typeof value === 'object' ? JSON.stringify(value) : value
     )
+    if (expire !== undefined) {
+      await this.redis?.hset(
+        `${cacheName}:expires`,
+        key,
+        JSON.stringify({ name: cacheName, key, at: new Date().getTime() + expire })
+      )
+    }
     return result
   }
 

src/models/client.ts

@@ -7,7 +7,6 @@ import { DefaultCacheAdapter, ICacheAdapter } from './cacheAdapter.ts'
 import { UserManager } from '../managers/users.ts'
 import { GuildManager } from '../managers/guilds.ts'
 import { ChannelsManager } from '../managers/channels.ts'
-import { MessagesManager } from '../managers/messages.ts'
 import {
   ActivityGame,
   ClientActivity,
@@ -31,6 +30,8 @@ export interface ClientOptions {
   bot?: boolean
   /** Force all requests to Canary API */
   canary?: boolean
+  /** Time till which Messages are to be cached, in MS. Default is 3600000 */
+  messageCacheLifetime?: number
 }
 
 /**
@@ -53,11 +54,12 @@ export class Client extends EventEmitter {
   intents?: GatewayIntents[]
   /** Whether to force new session or not */
   forceNewSession?: boolean
+  /** Time till messages to stay cached, in MS. */
+  messageCacheLifetime: number = 3600000
 
   users: UserManager = new UserManager(this)
   guilds: GuildManager = new GuildManager(this)
   channels: ChannelsManager = new ChannelsManager(this)
-  messages: MessagesManager = new MessagesManager(this)
   emojis: EmojisManager = new EmojisManager(this)
   
   /** Whether this client will login as bot user or not */
@@ -80,6 +82,7 @@ export class Client extends EventEmitter {
           : new ClientPresence(options.presence)
     if (options.bot === false) this.bot = false
     if (options.canary === true) this.canary = true
+    if (options.messageCacheLifetime !== undefined) this.messageCacheLifetime = options.messageCacheLifetime
   }
 
   /** Set Cache Adapter */

src/structures/textChannel.ts

@@ -1,3 +1,4 @@
+import { MessagesManager } from "../../mod.ts"
 import { Client } from '../models/client.ts'
 import { GuildTextChannelPayload, MessageOption, Overwrite, TextChannelPayload } from '../types/channel.ts'
 import { CHANNEL_MESSAGE, CHANNEL_MESSAGES } from '../types/endpoint.ts'
@@ -11,9 +12,11 @@ type AllMessageOptions = MessageOption | Embed
 export class TextChannel extends Channel {
   lastMessageID?: string
   lastPinTimestamp?: string
+  messages: MessagesManager
 
   constructor (client: Client, data: TextChannelPayload) {
     super(client, data)
+    this.messages = new MessagesManager(this.client, this)
     this.lastMessageID = data.last_message_id
     this.lastPinTimestamp = data.last_pin_timestamp
   }

src/test/cmd.ts

@@ -2,6 +2,8 @@ import { Command, CommandClient, Intents } from '../../mod.ts'
 import { GuildChannel } from "../managers/guildChannels.ts"
 import { CommandContext } from "../models/command.ts"
 import { Extension } from "../models/extensions.ts"
+import { Message } from "../structures/message.ts"
+import { MessageDeletePayload } from "../types/gateway.ts"
 import { TOKEN } from './config.ts'
 
 const client = new CommandClient({
@@ -16,6 +18,14 @@ client.on('ready', () => {
   console.log(`[Login] Logged in as ${client.user?.tag}!`)
 })
 
+client.on('messageDelete', (msg: Message) => {
+  console.log(`Message Deleted: ${msg.id}, ${msg.author.tag}, ${msg.content}`)
+})
+
+client.on('messageDeleteUncached', (d: MessageDeletePayload) => {
+  console.log(`Uncached Message Deleted: ${d.id} in ${d.channel_id}`)
+})
+
 // client.on('messageCreate', msg => console.log(`${msg.author.tag}: ${msg.content}`))
 
 client.on("commandError", console.error)