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Only update seq if pts changed
This solves UpdateChatParticipant being missed after UpdateChat, which seems to reliable occur when a bot is in a Chat that gets deleted.
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@ -470,27 +470,32 @@ class MessageBox:
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raise GapError
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# else apply
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self.date = date
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if seq != NO_SEQ:
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self.seq = seq
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def _sort_gaps(update):
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pts = PtsInfo.from_update(update)
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return pts.pts - pts.pts_count if pts else 0
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any_pts_applied = [False] # using a list to pass "by reference"
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result.extend(filter(None, (
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self.apply_pts_info(u, reset_deadline=True, any_pts_applied=any_pts_applied)
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# Telegram can send updates out of order (e.g. ReadChannelInbox first
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# and then NewChannelMessage, both with the same pts, but the count is
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# 0 and 1 respectively).
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# 0 and 1 respectively), so we sort them first.
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for u in sorted(updates, key=_sort_gaps))))
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# > If the updates were applied, local *Updates* state must be updated
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# > with `seq` (unless it's 0) and `date` from the constructor.
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#
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# We can't know beforehand if this would cause issues (i.e. if any of
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# the updates is the first one we get to know about a specific channel)
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# (other than doing a pre-scan to check if any has info about an entry
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# we lack), so instead we sort preemptively. As a bonus there's less
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# likelyhood of "possible gaps" by doing this.
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# TODO give this more thought, perhaps possible gaps can't happen at all
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# (not ones which would be resolved by sorting anyway)
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result.extend(filter(None, (
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self.apply_pts_info(u, reset_deadline=True) for u in sorted(updates, key=_sort_gaps))))
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# By "were applied", we assume it means "some other pts was applied".
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# Updates which can be applied in any order, such as `UpdateChat`,
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# should not cause `seq` to be updated (or upcoming updates such as
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# `UpdateChatParticipant` could be missed).
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if any_pts_applied[0]:
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if __debug__:
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self._trace('Updating seq as local pts was updated too')
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self.date = date
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if seq != NO_SEQ:
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self.seq = seq
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self.apply_deadlines_reset()
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@ -530,6 +535,7 @@ class MessageBox:
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update,
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*,
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reset_deadline,
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any_pts_applied=[True], # mutable default is fine as it's write-only
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):
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# This update means we need to call getChannelDifference to get the updates from the channel
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if isinstance(update, tl.UpdateChannelTooLong):
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@ -581,6 +587,7 @@ class MessageBox:
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return None
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else:
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# Apply
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any_pts_applied[0] = True
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if __debug__:
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self._trace('Applying update pts since local pts %r = %r: %s', local_pts, pts, update)
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