add user/member lastMessageID (#959)

* add user.lastMessageID

* stupid

* add member.lastMessageID

src/client/actions/MessageCreate.js

@@ -6,19 +6,25 @@ class MessageCreateAction extends Action {
     const client = this.client;
 
     const channel = client.channels.get((data instanceof Array ? data[0] : data).channel_id);
+    const user = client.users.get((data instanceof Array ? data[0] : data).author.id);
     if (channel) {
+      const member = channel.guild ? channel.guild.member(user) : null;
       if (data instanceof Array) {
         const messages = new Array(data.length);
         for (let i = 0; i < data.length; i++) {
           messages[i] = channel._cacheMessage(new Message(channel, data[i], client));
         }
         channel.lastMessageID = messages[messages.length - 1].id;
+        if (user) user.lastMessageID = messages[messages.length - 1].id;
+        if (member) member.lastMessageID = messages[messages.length - 1].id;
         return {
           messages,
         };
       } else {
         const message = channel._cacheMessage(new Message(channel, data, client));
         channel.lastMessageID = data.id;
+        if (user) user.lastMessageID = data.id;
+        if (member) member.lastMessageID = data.id;
         return {
           message,
         };

src/structures/GuildMember.js

@@ -33,6 +33,12 @@ class GuildMember {
 
     this._roles = [];
     if (data) this.setup(data);
+
+    /**
+     * The ID of the last message sent by the member in their guild, if one was sent.
+     * @type {?string}
+     */
+    this.lastMessageID = null;
   }
 
   setup(data) {

src/structures/User.js

@@ -49,6 +49,12 @@ class User {
      * @type {boolean}
      */
     this.bot = Boolean(data.bot);
+
+    /**
+     * The ID of the last message sent by the user, if one was sent.
+     * @type {?string}
+     */
+    this.lastMessageID = null;
   }
 
   patch(data) {