create bot_manager module to handle background bot start

src/bot_manager.rs

@@ -0,0 +1,106 @@
+use std::{collections::HashMap, sync::RwLock, thread::JoinHandle};
+
+use lazy_static::lazy_static;
+use teloxide::{
+    dispatching::dialogue::serializer::Json,
+    dptree,
+    prelude::{Dispatcher, Requester},
+    Bot,
+};
+
+use crate::{
+    bot_handler::script_handler,
+    db::{bots::BotInstance, DbError, DB},
+    mongodb_storage::MongodbStorage,
+    BotController, BotError, BotResult,
+};
+
+pub struct BotRunner {
+    controller: BotController,
+    info: BotInfo,
+    thread: JoinHandle<BotResult<()>>,
+}
+
+unsafe impl Sync for BotRunner {}
+unsafe impl Send for BotRunner {}
+
+#[derive(Clone)]
+pub struct BotInfo {
+    pub name: String,
+}
+
+lazy_static! {
+    static ref BOT_POOL: RwLock<HashMap<String, BotRunner>> = RwLock::new(HashMap::new());
+}
+
+static DEFAULT_SCRIPT: &str =
+    include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/default_script.js"));
+
+pub async fn deploy_bot(db: &mut DB, token: &str) -> BotResult<BotInfo> {
+    let bot = Bot::new(token);
+    let name = bot.get_me().await?.username().to_string();
+
+    let bi = BotInstance::new(name.clone(), token.to_string(), DEFAULT_SCRIPT.to_string())
+        .store(db)
+        .await?;
+
+    start_bot(bi, &mut db.clone().with_name(name)).await
+}
+
+pub async fn start_bot(bi: BotInstance, db: &mut DB) -> BotResult<BotInfo> {
+    let controller = BotController::with_db(db.clone(), &bi.token, &bi.script).await?;
+
+    let thread = spawn_bot_thread(controller.clone(), db).await?;
+
+    let info = BotInfo {
+        name: bi.name.clone(),
+    };
+    let runner = BotRunner {
+        controller,
+        info: info.clone(),
+        thread,
+    };
+
+    BOT_POOL
+        .write()
+        .map_or_else(
+            |err| {
+                Err(BotError::RwLockError(format!(
+                    "Failed to lock BOT_POOL because previous thread paniced, err: {err}"
+                )))
+            },
+            Ok,
+        )?
+        .insert(bi.name.clone(), runner);
+
+    Ok(info)
+}
+
+pub async fn spawn_bot_thread(
+    bc: BotController,
+    db: &mut DB,
+) -> BotResult<JoinHandle<BotResult<()>>> {
+    let state_mgr = MongodbStorage::from_db(db, Json)
+        .await
+        .map_err(DbError::from)?;
+    let thread = std::thread::spawn(move || -> BotResult<()> {
+        let state_mgr = state_mgr;
+
+        let handler = script_handler(bc.rc);
+
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()?;
+
+        rt.block_on(
+            Dispatcher::builder(bc.bot, handler)
+                .dependencies(dptree::deps![bc.db, state_mgr])
+                .build()
+                .dispatch(),
+        );
+
+        Ok(())
+    });
+
+    Ok(thread)
+}

src/main.rs

@@ -1,4 +1,5 @@
 pub mod admin;
+pub mod bot_manager;
 pub mod botscript;
 pub mod commands;
 pub mod db;