feat: get message by id

src/Client.js

@@ -610,6 +610,37 @@ class Client extends EventEmitter {
         return ContactFactory.create(this, contact);
     }
 
+    async getMessageById(messageId) {
+        const msg = await this.pupPage.evaluate(async messageId => {
+            let msg = window.Store.Msg.get(messageId);
+            if(msg) return window.WWebJS.getMessageModel(msg);
+
+            const params = messageId.split('_');
+            if(params.length !== 3) throw new Error('Invalid serialized message id specified');
+
+            const [fromMe, chatId, id] = params;
+            const chatWid = window.Store.WidFactory.createWid(chatId);
+            const fullMsgId = {
+                fromMe: Boolean(fromMe),
+                remote: chatWid,
+                id,
+            };
+            
+            const msgKey = new window.Store.MsgKey(fullMsgId);
+            const chat = await window.Store.Chat.find(msgKey.remote);
+            const ctx = await chat.getSearchContext(msgKey);
+            if(ctx.collection && ctx.collection.loadAroundPromise) {
+                await ctx.collection.loadAroundPromise;
+            }
+
+            msg = window.Store.Msg.get(messageId);
+            if(msg) return window.WWebJS.getMessageModel(msg);
+        }, messageId);
+
+        if(msg) return new Message(this, msg);
+        return null;
+    }
+
     /**
      * Returns an object with information about the invite code's group
      * @param {string} inviteCode