added a filter for messages without user information

src/filter_user_info.rs

@@ -0,0 +1,51 @@
+use crate::prelude::*;
+use teloxide::{dispatching::DpHandlerDescription, dptree::Handler};
+
+#[inline]
+fn has_no_user_info(msg: Message) -> bool {
+    msg.from().is_none()
+}
+
+#[inline]
+async fn notify_about_no_user_info(
+    bot: Throttle<Bot>,
+    msg: Message,
+    state: State,
+) -> crate::Result<()> {
+    use State::*;
+    const TEXT: &str = "Invalid message. Couldn't get the user information. Send the message again";
+
+    match state {
+        Start => {
+            bot.send_message(msg.chat.id, TEXT)
+                .reply_markup(deletion_markup())
+                .await?;
+        }
+        GetNewName(handler)
+        | GetMasterPass(handler)
+        | GetNewMasterPass(handler)
+        | GetLogin(handler)
+        | GetPassword(handler) => {
+            let mut handler = handler.lock().await;
+            handler
+                .previous
+                .alter_message(&bot, TEXT, None, None)
+                .await?;
+        }
+        GetUser(handler) => {
+            let mut handler = handler.lock().await;
+            handler
+                .previous
+                .alter_message(&bot, TEXT, None, None)
+                .await?;
+        }
+    };
+
+    Ok(())
+}
+
+/// Gets a handler that filters out the messages without user information
+#[inline]
+pub fn get_handler() -> Handler<'static, DependencyMap, crate::Result<()>, DpHandlerDescription> {
+    dptree::filter(has_no_user_info).endpoint(notify_about_no_user_info)
+}

src/main.rs

@@ -2,6 +2,7 @@ mod callbacks;
 mod commands;
 mod default;
 mod errors;
+mod filter_user_info;
 mod macros;
 mod markups;
 mod master_password_check;
@@ -47,6 +48,8 @@ fn get_dispatcher(
 
     let message_handler = Update::filter_message()
         .map_async(utils::delete_message)
+        // Filters out the messages without user information
+        .branch(filter_user_info::get_handler())
         .branch(case![State::GetNewName(next)].endpoint(state::get_new_name))
         .branch(case![State::GetMasterPass(next)].endpoint(state::get_master_pass))
         .branch(case![State::GetNewMasterPass(next)].endpoint(state::get_new_master_pass))

src/state/handler.rs

@@ -70,7 +70,7 @@ type DynHanlder<T> = Box<
         + Send,
 >;
 
-pub struct Handler<T> {
+pub struct Handler<T: ?Sized> {
     pub func: Option<DynHanlder<T>>,
 
     pub previous: MessageIds,