Function for checks for the existence of target user have been implemented for enum TargetUser

src/types/enums/target_user.rs

@@ -15,6 +15,21 @@ pub enum TargetUser {
 }
 
 impl TargetUser {
+    pub fn exist(&self) -> bool {
+        match self {
+            Self::Id(_id) => true,
+            Self::Reply(msg) => {
+                if let Some(replied_msg) = msg.reply_to_message() {
+                    return replied_msg.from().map(|user| user.id).is_some();
+                } else {
+                    false
+                }
+            }
+            Self::CurrentMessage(msg) => msg.from().map(|user| user.id).is_some(),
+            Self::None => false,
+        }
+    }
+
     pub fn get_id(&self) -> Option<i64> {
         match self {
             Self::Id(id) => Some(*id),