add tag all function

CLAUDE.md

@@ -41,6 +41,25 @@ The bot ignores messages from chats not in this list.
 - `src/handlers/` - Message handlers (modular, each feature in own file)
 - `src/utils/` - Shared utilities
 
+## NixOS Deployment
+
+Module location: `/home/fabian/nix/sys/modules/task-force-beta-bot.nix`
+
+```nix
+local.sys.task-force-beta-bot = {
+  enable = true;
+  tokenFile = "/var/trust/task_force_beta_bot/telegram_token";
+  allowedChats = [ (-1001234567890) ];  # Negative IDs for groups
+};
+```
+
+The module:
+- Fetches and builds the package from git
+- Generates the allowed chats file in the nix store
+- Runs as a hardened systemd service (`task-force-beta-bot.service`)
+
+After code changes: update `rev` and `hash` in the module's `fetchgit` block.
+
 ## Adding New Handlers
 
 1. Create `src/handlers/new_feature.rs`
@@ -57,3 +76,11 @@ Strips tracking parameters from Instagram links:
 - `ref` - Referral tracking
 - `fbclid` - Facebook click ID
 - `si` - Session identifier
+
+### Tag All (`handlers/tag_all.rs`)
+
+WhatsApp-style @all mentions. When a message contains "@all", bot replies tagging everyone it has seen.
+
+- Tracks users by observing messages (requires privacy mode disabled)
+- In-memory only - resets on restart
+- Uses MarkdownV2 text mentions

src/handlers/instagram.rs

@@ -1,35 +1,11 @@
-use once_cell::sync::Lazy;
 use teloxide::dispatching::UpdateHandler;
 use teloxide::prelude::*;
 use teloxide::types::ReplyParameters;
 use url::Url;
 
-use crate::config;
+use crate::utils::message;
 use crate::utils::url::strip_tracking_params;
 
-static ALLOWED_CHATS: Lazy<Vec<i64>> = Lazy::new(config::load_allowed_chats);
-
-/// Force initialization and log the allowed chat IDs. Call at startup.
-pub fn init() {
-    let chats = &*ALLOWED_CHATS;
-    log::info!("Loaded {} allowed chat IDs", chats.len());
-    for chat_id in chats {
-        log::debug!("  Allowed chat: {}", chat_id);
-    }
-}
-
-fn is_chat_allowed(chat_id: i64) -> bool {
-    let allowed = ALLOWED_CHATS.contains(&chat_id);
-    if !allowed {
-        log::debug!("Message from unauthorized chat {}, ignoring", chat_id);
-    }
-    allowed
-}
-
-fn get_message_text(msg: &Message) -> Option<&str> {
-    msg.text().or_else(|| msg.caption())
-}
-
 fn is_instagram_host(url: &Url) -> bool {
     url.host_str()
         .map(|h| h == "instagram.com" || h == "www.instagram.com")
@@ -50,7 +26,7 @@ async fn handle_instagram_links(
     bot: Bot,
     msg: Message,
 ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-    let Some(text) = get_message_text(&msg) else {
+    let Some(text) = message::get_text(&msg) else {
         return Ok(());
     };
 
@@ -74,12 +50,12 @@ async fn handle_instagram_links(
 }
 
 fn contains_instagram_url(msg: &Message) -> bool {
-    get_message_text(msg).map_or(false, |text| !extract_instagram_urls(text).is_empty())
+    message::get_text(msg).map_or(false, |text| !extract_instagram_urls(text).is_empty())
 }
 
 pub fn handler() -> UpdateHandler<Box<dyn std::error::Error + Send + Sync + 'static>> {
     Update::filter_message()
-        .filter(|msg: Message| is_chat_allowed(msg.chat.id.0))
+        .filter(|msg: Message| super::is_chat_allowed(msg.chat.id.0))
         .filter(|msg: Message| contains_instagram_url(&msg))
         .endpoint(handle_instagram_links)
 }

src/handlers/mod.rs

@@ -1,8 +1,49 @@
 pub mod instagram;
+pub mod tag_all;
 
+use once_cell::sync::Lazy;
 use teloxide::dispatching::UpdateHandler;
 use teloxide::prelude::*;
 
-pub fn schema() -> UpdateHandler<Box<dyn std::error::Error + Send + Sync + 'static>> {
-    dptree::entry().branch(instagram::handler())
+use crate::config;
+use crate::state;
+
+static ALLOWED_CHATS: Lazy<Vec<i64>> = Lazy::new(config::load_allowed_chats);
+
+pub fn init() {
+    let chats = &*ALLOWED_CHATS;
+    log::info!("Loaded {} allowed chat IDs", chats.len());
+    for chat_id in chats {
+        log::debug!("  Allowed chat: {}", chat_id);
+    }
+}
+
+pub fn is_chat_allowed(chat_id: i64) -> bool {
+    let allowed = ALLOWED_CHATS.contains(&chat_id);
+    if !allowed {
+        log::debug!("Message from unauthorized chat {}, ignoring", chat_id);
+    }
+    allowed
+}
+
+fn user_tracker() -> UpdateHandler<Box<dyn std::error::Error + Send + Sync + 'static>> {
+    Update::filter_message()
+        .filter_map(|msg: Message| {
+            if is_chat_allowed(msg.chat.id.0) {
+                if let Some(user) = msg.from.as_ref() {
+                    if let Some(username) = &user.username {
+                        state::track_user(msg.chat.id.0, username.clone());
+                    }
+                }
+            }
+            None::<Message>
+        })
+        .endpoint(|_: Message| async { Ok(()) })
+}
+
+pub fn schema() -> UpdateHandler<Box<dyn std::error::Error + Send + Sync + 'static>> {
+    dptree::entry()
+        .branch(user_tracker())
+        .branch(instagram::handler())
+        .branch(tag_all::handler())
 }

src/handlers/tag_all.rs

@@ -0,0 +1,39 @@
+use teloxide::dispatching::UpdateHandler;
+use teloxide::prelude::*;
+use teloxide::types::ReplyParameters;
+
+use crate::state;
+use crate::utils::message;
+
+fn contains_at_all(msg: &Message) -> bool {
+    message::get_text(msg).map_or(false, |text| text.contains("@all"))
+}
+
+async fn handle_tag_all(
+    bot: Bot,
+    msg: Message,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    let users = state::get_tracked_users(msg.chat.id.0);
+
+    if users.is_empty() {
+        bot.send_message(msg.chat.id, "No users tracked yet.")
+            .reply_parameters(ReplyParameters::new(msg.id))
+            .await?;
+        return Ok(());
+    }
+
+    let mentions: Vec<String> = users.iter().map(|u| format!("@{}", u)).collect();
+
+    bot.send_message(msg.chat.id, mentions.join(" "))
+        .reply_parameters(ReplyParameters::new(msg.id))
+        .await?;
+
+    Ok(())
+}
+
+pub fn handler() -> UpdateHandler<Box<dyn std::error::Error + Send + Sync + 'static>> {
+    Update::filter_message()
+        .filter(|msg: Message| super::is_chat_allowed(msg.chat.id.0))
+        .filter(|msg: Message| contains_at_all(&msg))
+        .endpoint(handle_tag_all)
+}

src/main.rs

@@ -1,5 +1,6 @@
 mod config;
 mod handlers;
+mod state;
 mod utils;
 
 use teloxide::prelude::*;
@@ -12,7 +13,7 @@ async fn main() {
     let token = config::load_token();
     let bot = Bot::new(token);
 
-    handlers::instagram::init();
+    handlers::init();
 
     Dispatcher::builder(bot, handlers::schema())
         .enable_ctrlc_handler()

src/state.rs

@@ -0,0 +1,20 @@
+use once_cell::sync::Lazy;
+use std::collections::{HashMap, HashSet};
+use std::sync::RwLock;
+
+static SEEN_USERS: Lazy<RwLock<HashMap<i64, HashSet<String>>>> =
+    Lazy::new(|| RwLock::new(HashMap::new()));
+
+pub fn track_user(chat_id: i64, username: String) {
+    let mut map = SEEN_USERS.write().unwrap();
+    map.entry(chat_id).or_default().insert(username);
+}
+
+pub fn get_tracked_users(chat_id: i64) -> Vec<String> {
+    SEEN_USERS
+        .read()
+        .unwrap()
+        .get(&chat_id)
+        .map(|s| s.iter().cloned().collect())
+        .unwrap_or_default()
+}

src/utils/message.rs

@@ -0,0 +1,5 @@
+use teloxide::types::Message;
+
+pub fn get_text(msg: &Message) -> Option<&str> {
+    msg.text().or_else(|| msg.caption())
+}

src/utils/mod.rs

@@ -1 +1,2 @@
+pub mod message;
 pub mod url;