fix bug: editing text kept previous media in message

semantically, its better to have function, that fully prepares db
(connect and migrate)

src/admin.rs

@@ -83,7 +83,7 @@ pub async fn secret_command_handler(
                     .await?;
             } else if pass == admin_password {
                 db.set_admin(user.id, true).await;
-                bot.send_message(msg.from.unwrap().id, "You are admin now!")
+                bot.send_message(msg.from.unwrap().id, "You are an admin now!")
                     .await?;
             }
             Ok(())

src/db/mod.rs

@@ -4,11 +4,7 @@ use enum_stringify::EnumStringify;
 use futures::stream::{StreamExt, TryStreamExt};
 
 use mongodb::options::IndexOptions;
-use mongodb::{
-    bson::doc,
-    options::{ClientOptions, ResolverConfig},
-    Client,
-};
+use mongodb::{bson::doc, options::ClientOptions, Client};
 use mongodb::{Database, IndexModel};
 use serde::{Deserialize, Serialize};
 
@@ -39,6 +35,36 @@ pub struct User {
     pub language_code: Option<String>,
 }
 
+macro_rules! query_call {
+    ($func_name:ident, $self:ident, $db:ident, $return_type:ty, $body:block) => {
+        pub async fn $func_name<D: CallDB>(&$self, $db: &mut D)
+            -> Result<$return_type, Box<dyn std::error::Error>> $body
+    };
+}
+
+impl User {
+    query_call!(update_user, self, db, (), {
+        let db_collection = db.get_database().await.collection::<Self>("users");
+
+        db_collection
+            .update_one(
+                doc! { "_id": self._id },
+                doc! {
+                    "$set": {
+                        "first_name": &self.first_name,
+                        "last_name": &self.last_name,
+                        "username": &self.username,
+                        "language_code": &self.language_code,
+                        "is_admin": &self.is_admin,
+                    }
+                },
+            )
+            .await?;
+
+        Ok(())
+    });
+}
+
 #[derive(Serialize, Deserialize)]
 pub struct Message {
     pub _id: bson::oid::ObjectId,
@@ -94,6 +120,13 @@ impl DB {
             .await?;
         Ok(())
     }
+
+    pub async fn init<S: Into<String>>(db_url: S) -> Result<Self, mongodb::error::Error> {
+        let mut db = Self::new(db_url).await;
+        db.migrate().await?;
+
+        Ok(db)
+    }
 }
 
 #[async_trait]

src/main.rs

@@ -28,7 +28,7 @@ use teloxide::{
 type BotDialogue = Dialogue<State, MongodbStorage<Json>>;
 
 #[derive(Envconfig)]
-struct Config {
+pub struct Config {
     #[envconfig(from = "BOT_TOKEN")]
     pub bot_token: String,
     #[envconfig(from = "DATABASE_URL")]
@@ -68,16 +68,27 @@ pub enum State {
     },
 }
 
+pub struct BotController {
+    pub bot: Bot,
+    pub db: DB,
+}
+
+impl BotController {
+    pub async fn new(config: &Config) -> Result<Self, Box<dyn std::error::Error>> {
+        let bot = Bot::new(&config.bot_token);
+        let db = DB::init(&config.db_url).await?;
+
+        Ok(Self { bot, db })
+    }
+}
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     dotenvy::dotenv()?;
     let config = Config::init_from_env()?;
 
-    let bot = Bot::new(&config.bot_token);
-    let mut db = DB::new(&config.db_url).await;
-    db.migrate().await.unwrap();
-    let db_url2 = config.db_url.clone();
-    let state_mgr = MongodbStorage::open(&db_url2, "gongbot", Json).await?;
+    let mut bc = BotController::new(&config).await?;
+    let state_mgr = MongodbStorage::open(config.db_url.clone().as_ref(), "gongbot", Json).await?;
 
     // TODO: delete this in production
     let events: Vec<DateTime<Utc>> = vec!["2025-04-09T18:00:00+04:00", "2025-04-11T16:00:00+04:00"]
@@ -86,7 +97,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         .collect();
 
     for event in events {
-        match db.clone().create_event(event).await {
+        match bc.db.create_event(event).await {
             Ok(e) => println!("Created event {}", e._id),
             Err(err) => println!("Failed to create event, error: {}", err),
         }
@@ -127,8 +138,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         )
         .branch(Update::filter_message().endpoint(echo));
 
-    Dispatcher::builder(bot, handler)
-        .dependencies(dptree::deps![db, state_mgr])
+    Dispatcher::builder(bc.bot, handler)
+        .dependencies(dptree::deps![bc.db, state_mgr])
         .enable_ctrlc_handler()
         .build()
         .dispatch()
@@ -231,6 +242,7 @@ async fn edit_msg_handler(
 
     match msg.media_kind {
         MediaKind::Text(text) => {
+            db.drop_media(&literal).await.unwrap();
             if is_caption_set {
                 return Ok(());
             };
@@ -395,6 +407,8 @@ async fn user_command_handler(
     let user = db
         .get_or_init_user(tguser.id.0 as i64, &tguser.first_name)
         .await;
+    let user = update_user_tg(user, msg.from.as_ref().unwrap());
+    user.update_user(&mut db).await.unwrap();
     println!("MSG: {}", msg.html_text().unwrap());
     match cmd {
         UserCommands::Start => {
@@ -575,3 +589,13 @@ async fn echo(bot: Bot, msg: Message) -> Result<(), teloxide::RequestError> {
         .await?;
     Ok(())
 }
+
+fn update_user_tg(user: db::User, tguser: &teloxide::types::User) -> db::User {
+    db::User {
+        first_name: tguser.first_name.clone(),
+        last_name: tguser.last_name.clone(),
+        username: tguser.username.clone(),
+        language_code: tguser.language_code.clone(),
+        ..user
+    }
+}