scroll to bottom when new message and prevent sending empty message

client/src/components/Message.tsx

@@ -29,11 +29,10 @@ const Likes = ({ likes }: {likes: number}) => {
   );
 };
 
-const Message = ({ text = '', user, date, image = '' }: any) => {
-  const id = '1'; // replace with real id in the future
+const Message = ({ text = '', user, date, image = '', id }: any) => {
   return (
     <>
-      <div className="flex bg-grey-dark rounded-xl w-full max-w-3xl p-5 gap-5 shadow-md shadow-grey-dark">
+      <div className="flex bg-grey-dark rounded-xl w-full max-w-3xl p-5 gap-5 shadow-md shadow-grey-dark" id={"messageId" + id}>
         {user && <Avatar user={user} />}
         <div className="flex flex-col gap-2 relative flex-grow">
           <div className="flex justify-between">

client/src/components/MessageWrapper.tsx

@@ -18,8 +18,6 @@ const getMessages = async () => {
 const MessageWrapper = () => {
   const messages = useQuery(["messages"], getMessages, {
     onSuccess: (data) => {
-      console.log(data);
-      
       return data;
     },
     onError: (error) => {
@@ -36,7 +34,7 @@ const MessageWrapper = () => {
   return (
     <main className="messages-wrapper flex flex-col p-4 gap-4 overflow-scroll w-full max-w-3xl">
       {messages.isLoading ? '' : messages.data?.map((message: any) => (
-        <Message user={message.author} text={message.content} image={message.image} date={message.createdAt}/>
+        <Message user={message.author} text={message.content} image={message.image} date={message.createdAt} id={message.id}/>
       ))}
     </main>
   );

client/src/components/NewMessage.tsx

@@ -7,9 +7,8 @@ const sendMessage = async (data: FormData) => {
   const token = new Cookies().get('token');
   let contentType = 'application/json';
   let body: FormData | string | undefined = undefined;
-  console.log(data.get('image'));
   
-  if (data.get('image')?.name !== "") {
+  if (data.get('image')) {
     contentType = 'multipart/form-data';
     body = data;
   } else {
@@ -32,9 +31,12 @@ const NewMessage = () => {
   const queryClient = useQueryClient();
 
   const { mutate: send } = useMutation(sendMessage, {
-    onSuccess: (data) => {
-      console.log(data);
+    onSuccess: () => {
       queryClient.invalidateQueries(['messages']);
+      const messageWrapper = document.querySelector('.messages-wrapper');
+      messageWrapper?.addEventListener('DOMNodeInserted', () => {
+        messageWrapper?.scrollTo(0, messageWrapper.scrollHeight);
+      });
     },
     onError: (error) => {
       console.error(error);
@@ -43,6 +45,9 @@ const NewMessage = () => {
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
+    if (message.trim().length === 0 && image.trim().length === 0) {
+      return;
+    }
     const data = new FormData(e.target as HTMLFormElement);
     send(data);
     setMessage('');