Fix BotInlineSend updates breaking seq

Author: notmyst33d

lib/grammers-session/src/message_box/mod.rs

@@ -33,6 +33,7 @@ use crate::message_box::defs::PossibleGap;
 pub(crate) use defs::Entry;
 pub use defs::{Gap, MessageBox};
 use defs::{NO_DATE, NO_PTS, NO_SEQ, POSSIBLE_GAP_TIMEOUT, PtsInfo, State};
+use grammers_tl_types::enums::Update;
 use grammers_tl_types as tl;
 use log::{debug, info, trace, warn};
 use std::cmp::Ordering;
@@ -485,6 +486,7 @@ impl MessageBox {
         // which the deadlines should be reset, and determines whether any local pts was changed
         // so that the seq can be updated too (which could otherwise have been done earlier).
         let mut any_pts_applied = false;
+        let mut force_update_seq = false;
         let mut reset_deadlines_for = mem::take(&mut self.tmp_entries);
         for update in updates {
             let (entry, update) = self.apply_pts_info(update);
@@ -495,8 +497,16 @@ impl MessageBox {
                 reset_deadlines_for.insert(entry);
             }
             if let Some(update) = update {
+                // BotInlineSend updates are sent with `seq` != NO_SEQ. `seq` must be updated in
+                // that case, otherwise every other BotInlineSend update will be counted as a gap
+                // and dropped.
+                match update {
+                    Update::BotInlineSend(_) => force_update_seq = true,
+                    _ => {},
+                }
                 result.push(update);
                 any_pts_applied |= entry.is_some();
+
             }
         }
         self.reset_deadlines(&reset_deadlines_for, next_updates_deadline());
@@ -510,7 +520,7 @@ impl MessageBox {
         // Updates which can be applied in any order, such as `UpdateChat`,
         // should not cause `seq` to be updated (or upcoming updates such as
         // `UpdateChatParticipant` could be missed).
-        if any_pts_applied {
+        if any_pts_applied || force_update_seq {
             if date != NO_DATE {
                 self.date = date;
             }