1 //! `ChatServer` is an actor. It maintains list of connection client session.
2 //! And manages available rooms. Peers send messages to other peers in same
3 //! room through `ChatServer`.
7 use rand::{rngs::ThreadRng, Rng};
8 use serde::{Deserialize, Serialize};
10 use std::collections::{HashMap, HashSet};
11 use std::str::FromStr;
12 use std::time::SystemTime;
14 use crate::api::comment::*;
15 use crate::api::community::*;
16 use crate::api::post::*;
17 use crate::api::site::*;
18 use crate::api::user::*;
20 use crate::apub::puller::*;
23 /// Chat server sends this messages to session
25 pub struct WSMessage(pub String);
27 /// Message for chat server communications
29 /// New chat session is created
33 pub addr: Recipient<WSMessage>,
37 /// Session is disconnected
39 pub struct Disconnect {
44 /// Send message to specific room
46 pub struct ClientMessage {
47 /// Id of the client session
55 #[derive(Serialize, Deserialize)]
56 pub struct StandardMessage {
57 /// Id of the client session
63 impl actix::Message for StandardMessage {
68 pub struct RateLimitBucket {
69 last_checked: SystemTime,
73 pub struct SessionInfo {
74 pub addr: Recipient<WSMessage>,
78 /// `ChatServer` manages chat rooms and responsible for coordinating chat
79 /// session. implementation is super primitive
80 pub struct ChatServer {
81 sessions: HashMap<usize, SessionInfo>, // A map from generated random ID to session addr
82 rate_limits: HashMap<String, RateLimitBucket>,
83 rooms: HashMap<i32, HashSet<usize>>, // A map from room / post name to set of connectionIDs
87 impl Default for ChatServer {
88 fn default() -> ChatServer {
90 let rooms = HashMap::new();
93 sessions: HashMap::new(),
94 rate_limits: HashMap::new(),
96 rng: rand::thread_rng(),
102 /// Send message to all users in the room
103 fn send_room_message(&self, room: &i32, message: &str, skip_id: usize) {
104 if let Some(sessions) = self.rooms.get(room) {
107 if let Some(info) = self.sessions.get(id) {
108 let _ = info.addr.do_send(WSMessage(message.to_owned()));
115 fn join_room(&mut self, room_id: i32, id: usize) {
116 // remove session from all rooms
117 for (_n, sessions) in &mut self.rooms {
118 sessions.remove(&id);
121 // If the room doesn't exist yet
122 if self.rooms.get_mut(&room_id).is_none() {
123 self.rooms.insert(room_id, HashSet::new());
126 &self.rooms.get_mut(&room_id).unwrap().insert(id);
129 fn send_community_message(
134 ) -> Result<(), Error> {
135 use crate::db::post_view::*;
137 let conn = establish_connection();
139 let posts = PostQueryBuilder::create(&conn)
140 .listing_type(ListingType::Community)
141 .sort(&SortType::New)
142 .for_community_id(*community_id)
147 self.send_room_message(&post.id, message, skip_id);
153 fn check_rate_limit_register(&mut self, id: usize) -> Result<(), Error> {
154 self.check_rate_limit_full(
156 Settings::get().rate_limit.register,
157 Settings::get().rate_limit.register_per_second,
161 fn check_rate_limit_post(&mut self, id: usize) -> Result<(), Error> {
162 self.check_rate_limit_full(
164 Settings::get().rate_limit.post,
165 Settings::get().rate_limit.post_per_second,
169 fn check_rate_limit_message(&mut self, id: usize) -> Result<(), Error> {
170 self.check_rate_limit_full(
172 Settings::get().rate_limit.message,
173 Settings::get().rate_limit.message_per_second,
177 fn check_rate_limit_full(&mut self, id: usize, rate: i32, per: i32) -> Result<(), Error> {
178 if let Some(info) = self.sessions.get(&id) {
179 if let Some(rate_limit) = self.rate_limits.get_mut(&info.ip) {
181 if rate_limit.allowance == -2f64 {
182 rate_limit.allowance = rate as f64;
185 let current = SystemTime::now();
186 let time_passed = current.duration_since(rate_limit.last_checked)?.as_secs() as f64;
187 rate_limit.last_checked = current;
188 rate_limit.allowance += time_passed * (rate as f64 / per as f64);
189 if rate_limit.allowance > rate as f64 {
190 rate_limit.allowance = rate as f64;
193 if rate_limit.allowance < 1.0 {
195 "Rate limited IP: {}, time_passed: {}, allowance: {}",
196 &info.ip, time_passed, rate_limit.allowance
199 op: "Rate Limit".to_string(),
200 message: format!("Too many requests. {} per {} seconds", rate, per),
203 rate_limit.allowance -= 1.0;
215 /// Make actor from `ChatServer`
216 impl Actor for ChatServer {
217 /// We are going to use simple Context, we just need ability to communicate
218 /// with other actors.
219 type Context = Context<Self>;
222 /// Handler for Connect message.
224 /// Register new session and assign unique id to this session
225 impl Handler<Connect> for ChatServer {
228 fn handle(&mut self, msg: Connect, _ctx: &mut Context<Self>) -> Self::Result {
229 // notify all users in same room
230 // self.send_room_message(&"Main".to_owned(), "Someone joined", 0);
232 // register session with random id
233 let id = self.rng.gen::<usize>();
234 println!("{} joined", &msg.ip);
236 self.sessions.insert(
240 ip: msg.ip.to_owned(),
244 if self.rate_limits.get(&msg.ip).is_none() {
245 self.rate_limits.insert(
248 last_checked: SystemTime::now(),
258 /// Handler for Disconnect message.
259 impl Handler<Disconnect> for ChatServer {
262 fn handle(&mut self, msg: Disconnect, _: &mut Context<Self>) {
263 // let mut rooms: Vec<i32> = Vec::new();
266 if self.sessions.remove(&msg.id).is_some() {
267 // remove session from all rooms
268 for (_id, sessions) in &mut self.rooms {
269 if sessions.remove(&msg.id) {
277 /// Handler for Message message.
278 impl Handler<StandardMessage> for ChatServer {
279 type Result = MessageResult<StandardMessage>;
281 fn handle(&mut self, msg: StandardMessage, _: &mut Context<Self>) -> Self::Result {
282 let msg_out = match parse_json_message(self, msg) {
284 Err(e) => e.to_string(),
287 MessageResult(msg_out)
291 fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<String, Error> {
292 let json: Value = serde_json::from_str(&msg.msg)?;
293 let data = &json["data"].to_string();
294 let op = &json["op"].as_str().ok_or(APIError {
295 op: "Unknown op type".to_string(),
296 message: format!("Unknown op type"),
299 let user_operation: UserOperation = UserOperation::from_str(&op)?;
301 match user_operation {
302 UserOperation::Login => {
303 let login: Login = serde_json::from_str(data)?;
304 let res = Oper::new(user_operation, login).perform()?;
305 Ok(serde_json::to_string(&res)?)
307 UserOperation::Register => {
308 let register: Register = serde_json::from_str(data)?;
309 let res = Oper::new(user_operation, register).perform();
311 chat.check_rate_limit_register(msg.id)?;
313 Ok(serde_json::to_string(&res?)?)
315 UserOperation::GetUserDetails => {
316 let get_user_details: GetUserDetails = serde_json::from_str(data)?;
317 let res = Oper::new(user_operation, get_user_details).perform()?;
318 Ok(serde_json::to_string(&res)?)
320 UserOperation::SaveUserSettings => {
321 let save_user_settings: SaveUserSettings = serde_json::from_str(data)?;
322 let res = Oper::new(user_operation, save_user_settings).perform()?;
323 Ok(serde_json::to_string(&res)?)
325 UserOperation::AddAdmin => {
326 let add_admin: AddAdmin = serde_json::from_str(data)?;
327 let res = Oper::new(user_operation, add_admin).perform()?;
328 Ok(serde_json::to_string(&res)?)
330 UserOperation::BanUser => {
331 let ban_user: BanUser = serde_json::from_str(data)?;
332 let res = Oper::new(user_operation, ban_user).perform()?;
333 Ok(serde_json::to_string(&res)?)
335 UserOperation::GetReplies => {
336 let get_replies: GetReplies = serde_json::from_str(data)?;
337 let res = Oper::new(user_operation, get_replies).perform()?;
338 Ok(serde_json::to_string(&res)?)
340 UserOperation::GetUserMentions => {
341 let get_user_mentions: GetUserMentions = serde_json::from_str(data)?;
342 let res = Oper::new(user_operation, get_user_mentions).perform()?;
343 Ok(serde_json::to_string(&res)?)
345 UserOperation::EditUserMention => {
346 let edit_user_mention: EditUserMention = serde_json::from_str(data)?;
347 let res = Oper::new(user_operation, edit_user_mention).perform()?;
348 Ok(serde_json::to_string(&res)?)
350 UserOperation::MarkAllAsRead => {
351 let mark_all_as_read: MarkAllAsRead = serde_json::from_str(data)?;
352 let res = Oper::new(user_operation, mark_all_as_read).perform()?;
353 Ok(serde_json::to_string(&res)?)
355 UserOperation::GetCommunity => {
356 let mut get_community: GetCommunity = serde_json::from_str(data)?;
357 if Settings::get().federation_enabled && get_community.name.is_some() {
358 let name = &get_community.name.unwrap();
359 let remote_community = if name.contains("@") {
360 // TODO: need to support sort, filter etc for remote communities
361 get_remote_community(name.to_owned())?
363 get_community.name = Some(name.replace("!", ""));
364 Oper::new(user_operation, get_community).perform()?
366 Ok(serde_json::to_string(&remote_community)?)
368 let res = Oper::new(user_operation, get_community).perform()?;
369 Ok(serde_json::to_string(&res)?)
372 UserOperation::ListCommunities => {
373 if Settings::get().federation_enabled {
374 let res = get_all_communities()?;
375 let val = ListCommunitiesResponse {
376 op: UserOperation::ListCommunities.to_string(),
379 Ok(serde_json::to_string(&val)?)
381 let list_communities: ListCommunities = serde_json::from_str(data)?;
382 let res = Oper::new(user_operation, list_communities).perform()?;
383 Ok(serde_json::to_string(&res)?)
386 UserOperation::CreateCommunity => {
387 chat.check_rate_limit_register(msg.id)?;
388 let create_community: CreateCommunity = serde_json::from_str(data)?;
389 let res = Oper::new(user_operation, create_community).perform()?;
390 Ok(serde_json::to_string(&res)?)
392 UserOperation::EditCommunity => {
393 let edit_community: EditCommunity = serde_json::from_str(data)?;
394 let res = Oper::new(user_operation, edit_community).perform()?;
395 let mut community_sent: CommunityResponse = res.clone();
396 community_sent.community.user_id = None;
397 community_sent.community.subscribed = None;
398 let community_sent_str = serde_json::to_string(&community_sent)?;
399 chat.send_community_message(&community_sent.community.id, &community_sent_str, msg.id)?;
400 Ok(serde_json::to_string(&res)?)
402 UserOperation::FollowCommunity => {
403 let follow_community: FollowCommunity = serde_json::from_str(data)?;
404 let res = Oper::new(user_operation, follow_community).perform()?;
405 Ok(serde_json::to_string(&res)?)
407 UserOperation::GetFollowedCommunities => {
408 let followed_communities: GetFollowedCommunities = serde_json::from_str(data)?;
409 let res = Oper::new(user_operation, followed_communities).perform()?;
410 Ok(serde_json::to_string(&res)?)
412 UserOperation::BanFromCommunity => {
413 let ban_from_community: BanFromCommunity = serde_json::from_str(data)?;
414 let community_id = ban_from_community.community_id;
415 let res = Oper::new(user_operation, ban_from_community).perform()?;
416 let res_str = serde_json::to_string(&res)?;
417 chat.send_community_message(&community_id, &res_str, msg.id)?;
420 UserOperation::AddModToCommunity => {
421 let mod_add_to_community: AddModToCommunity = serde_json::from_str(data)?;
422 let community_id = mod_add_to_community.community_id;
423 let res = Oper::new(user_operation, mod_add_to_community).perform()?;
424 let res_str = serde_json::to_string(&res)?;
425 chat.send_community_message(&community_id, &res_str, msg.id)?;
428 UserOperation::ListCategories => {
429 let list_categories: ListCategories = ListCategories;
430 let res = Oper::new(user_operation, list_categories).perform()?;
431 Ok(serde_json::to_string(&res)?)
433 UserOperation::CreatePost => {
434 chat.check_rate_limit_post(msg.id)?;
435 let create_post: CreatePost = serde_json::from_str(data)?;
436 let res = Oper::new(user_operation, create_post).perform()?;
437 Ok(serde_json::to_string(&res)?)
439 UserOperation::GetPost => {
440 let get_post: GetPost = serde_json::from_str(data)?;
441 chat.join_room(get_post.id, msg.id);
442 let res = Oper::new(user_operation, get_post).perform()?;
443 Ok(serde_json::to_string(&res)?)
445 UserOperation::GetPosts => {
446 let get_posts: GetPosts = serde_json::from_str(data)?;
447 let res = Oper::new(user_operation, get_posts).perform()?;
448 Ok(serde_json::to_string(&res)?)
450 UserOperation::CreatePostLike => {
451 chat.check_rate_limit_message(msg.id)?;
452 let create_post_like: CreatePostLike = serde_json::from_str(data)?;
453 let res = Oper::new(user_operation, create_post_like).perform()?;
454 Ok(serde_json::to_string(&res)?)
456 UserOperation::EditPost => {
457 let edit_post: EditPost = serde_json::from_str(data)?;
458 let res = Oper::new(user_operation, edit_post).perform()?;
459 let mut post_sent = res.clone();
460 post_sent.post.my_vote = None;
461 let post_sent_str = serde_json::to_string(&post_sent)?;
462 chat.send_room_message(&post_sent.post.id, &post_sent_str, msg.id);
463 Ok(serde_json::to_string(&res)?)
465 UserOperation::SavePost => {
466 let save_post: SavePost = serde_json::from_str(data)?;
467 let res = Oper::new(user_operation, save_post).perform()?;
468 Ok(serde_json::to_string(&res)?)
470 UserOperation::CreateComment => {
471 chat.check_rate_limit_message(msg.id)?;
472 let create_comment: CreateComment = serde_json::from_str(data)?;
473 let post_id = create_comment.post_id;
474 let res = Oper::new(user_operation, create_comment).perform()?;
475 let mut comment_sent = res.clone();
476 comment_sent.comment.my_vote = None;
477 comment_sent.comment.user_id = None;
478 let comment_sent_str = serde_json::to_string(&comment_sent)?;
479 chat.send_room_message(&post_id, &comment_sent_str, msg.id);
480 Ok(serde_json::to_string(&res)?)
482 UserOperation::EditComment => {
483 let edit_comment: EditComment = serde_json::from_str(data)?;
484 let post_id = edit_comment.post_id;
485 let res = Oper::new(user_operation, edit_comment).perform()?;
486 let mut comment_sent = res.clone();
487 comment_sent.comment.my_vote = None;
488 comment_sent.comment.user_id = None;
489 let comment_sent_str = serde_json::to_string(&comment_sent)?;
490 chat.send_room_message(&post_id, &comment_sent_str, msg.id);
491 Ok(serde_json::to_string(&res)?)
493 UserOperation::SaveComment => {
494 let save_comment: SaveComment = serde_json::from_str(data)?;
495 let res = Oper::new(user_operation, save_comment).perform()?;
496 Ok(serde_json::to_string(&res)?)
498 UserOperation::CreateCommentLike => {
499 chat.check_rate_limit_message(msg.id)?;
500 let create_comment_like: CreateCommentLike = serde_json::from_str(data)?;
501 let post_id = create_comment_like.post_id;
502 let res = Oper::new(user_operation, create_comment_like).perform()?;
503 let mut comment_sent = res.clone();
504 comment_sent.comment.my_vote = None;
505 comment_sent.comment.user_id = None;
506 let comment_sent_str = serde_json::to_string(&comment_sent)?;
507 chat.send_room_message(&post_id, &comment_sent_str, msg.id);
508 Ok(serde_json::to_string(&res)?)
510 UserOperation::GetModlog => {
511 let get_modlog: GetModlog = serde_json::from_str(data)?;
512 let res = Oper::new(user_operation, get_modlog).perform()?;
513 Ok(serde_json::to_string(&res)?)
515 UserOperation::CreateSite => {
516 let create_site: CreateSite = serde_json::from_str(data)?;
517 let res = Oper::new(user_operation, create_site).perform()?;
518 Ok(serde_json::to_string(&res)?)
520 UserOperation::EditSite => {
521 let edit_site: EditSite = serde_json::from_str(data)?;
522 let res = Oper::new(user_operation, edit_site).perform()?;
523 Ok(serde_json::to_string(&res)?)
525 UserOperation::GetSite => {
526 let online: usize = chat.sessions.len();
527 let get_site: GetSite = serde_json::from_str(data)?;
528 let mut res = Oper::new(user_operation, get_site).perform()?;
530 Ok(serde_json::to_string(&res)?)
532 UserOperation::Search => {
533 let search: Search = serde_json::from_str(data)?;
534 let res = Oper::new(user_operation, search).perform()?;
535 Ok(serde_json::to_string(&res)?)
537 UserOperation::TransferCommunity => {
538 let transfer_community: TransferCommunity = serde_json::from_str(data)?;
539 let res = Oper::new(user_operation, transfer_community).perform()?;
540 Ok(serde_json::to_string(&res)?)
542 UserOperation::TransferSite => {
543 let transfer_site: TransferSite = serde_json::from_str(data)?;
544 let res = Oper::new(user_operation, transfer_site).perform()?;
545 Ok(serde_json::to_string(&res)?)
547 UserOperation::DeleteAccount => {
548 let delete_account: DeleteAccount = serde_json::from_str(data)?;
549 let res = Oper::new(user_operation, delete_account).perform()?;
550 Ok(serde_json::to_string(&res)?)
552 UserOperation::PasswordReset => {
553 let password_reset: PasswordReset = serde_json::from_str(data)?;
554 let res = Oper::new(user_operation, password_reset).perform()?;
555 Ok(serde_json::to_string(&res)?)
557 UserOperation::PasswordChange => {
558 let password_change: PasswordChange = serde_json::from_str(data)?;
559 let res = Oper::new(user_operation, password_change).perform()?;
560 Ok(serde_json::to_string(&res)?)