mirror of
https://github.com/LonamiWebs/Telethon.git
synced 2024-11-10 19:46:36 +03:00
608 lines
24 KiB
Python
608 lines
24 KiB
Python
"""
|
|
This module deals with correct handling of updates, including gaps, and knowing when the code
|
|
should "get difference" (the set of updates that the client should know by now minus the set
|
|
of updates that it actually knows).
|
|
|
|
Each chat has its own [`Entry`] in the [`MessageBox`] (this `struct` is the "entry point").
|
|
At any given time, the message box may be either getting difference for them (entry is in
|
|
[`MessageBox::getting_diff_for`]) or not. If not getting difference, a possible gap may be
|
|
found for the updates (entry is in [`MessageBox::possible_gaps`]). Otherwise, the entry is
|
|
on its happy path.
|
|
|
|
Gaps are cleared when they are either resolved on their own (by waiting for a short time)
|
|
or because we got the difference for the corresponding entry.
|
|
|
|
While there are entries for which their difference must be fetched,
|
|
[`MessageBox::check_deadlines`] will always return [`Instant::now`], since "now" is the time
|
|
to get the difference.
|
|
"""
|
|
import asyncio
|
|
import datetime
|
|
import time
|
|
from .session import SessionState, ChannelState
|
|
from ..tl import types as tl, functions as fn
|
|
|
|
|
|
# Telegram sends `seq` equal to `0` when "it doesn't matter", so we use that value too.
|
|
NO_SEQ = 0
|
|
|
|
# See https://core.telegram.org/method/updates.getChannelDifference.
|
|
BOT_CHANNEL_DIFF_LIMIT = 100000
|
|
USER_CHANNEL_DIFF_LIMIT = 100
|
|
|
|
# > It may be useful to wait up to 0.5 seconds
|
|
POSSIBLE_GAP_TIMEOUT = 0.5
|
|
|
|
# After how long without updates the client will "timeout".
|
|
#
|
|
# When this timeout occurs, the client will attempt to fetch updates by itself, ignoring all the
|
|
# updates that arrive in the meantime. After all updates are fetched when this happens, the
|
|
# client will resume normal operation, and the timeout will reset.
|
|
#
|
|
# Documentation recommends 15 minutes without updates (https://core.telegram.org/api/updates).
|
|
NO_UPDATES_TIMEOUT = 15 * 60
|
|
|
|
# Entry "enum".
|
|
# Account-wide `pts` includes private conversations (one-to-one) and small group chats.
|
|
ENTRY_ACCOUNT = object()
|
|
# Account-wide `qts` includes only "secret" one-to-one chats.
|
|
ENTRY_SECRET = object()
|
|
# Integers will be Channel-specific `pts`, and includes "megagroup", "broadcast" and "supergroup" channels.
|
|
|
|
_sentinel = object()
|
|
|
|
def next_updates_deadline():
|
|
return asyncio.get_running_loop().time() + NO_UPDATES_TIMEOUT
|
|
|
|
|
|
class GapError(ValueError):
|
|
pass
|
|
|
|
|
|
# Represents the information needed to correctly handle a specific `tl::enums::Update`.
|
|
class PtsInfo:
|
|
__slots__ = ('pts', 'pts_count', 'entry')
|
|
|
|
def __init__(
|
|
self,
|
|
pts: int,
|
|
pts_count: int,
|
|
entry: object
|
|
):
|
|
self.pts = pts
|
|
self.pts_count = pts_count
|
|
self.entry = entry
|
|
|
|
@classmethod
|
|
def from_update(cls, update):
|
|
pts = getattr(update, 'pts', None)
|
|
if pts:
|
|
pts_count = getattr(update, 'pts_count', None) or 0
|
|
try:
|
|
entry = update.message.peer_id.channel_id
|
|
except AttributeError:
|
|
entry = getattr(update, 'channel_id', None) or ENTRY_ACCOUNT
|
|
return cls(pts=pts, pts_count=pts_count, entry=entry)
|
|
|
|
qts = getattr(update, 'qts', None)
|
|
if qts:
|
|
pts_count = 1 if isinstance(update, tl.UpdateNewEncryptedMessage) else 0
|
|
return cls(pts=qts, pts_count=pts_count, entry=ENTRY_SECRET)
|
|
|
|
return None
|
|
|
|
|
|
# The state of a particular entry in the message box.
|
|
class State:
|
|
__slots__ = ('pts', 'deadline')
|
|
|
|
def __init__(
|
|
self,
|
|
# Current local persistent timestamp.
|
|
pts: int,
|
|
# Next instant when we would get the update difference if no updates arrived before then.
|
|
deadline: float
|
|
):
|
|
self.pts = pts
|
|
self.deadline = deadline
|
|
|
|
|
|
# > ### Recovering gaps
|
|
# > […] Manually obtaining updates is also required in the following situations:
|
|
# > • Loss of sync: a gap was found in `seq` / `pts` / `qts` (as described above).
|
|
# > It may be useful to wait up to 0.5 seconds in this situation and abort the sync in case a new update
|
|
# > arrives, that fills the gap.
|
|
#
|
|
# This is really easy to trigger by spamming messages in a channel (with as little as 3 members works), because
|
|
# the updates produced by the RPC request take a while to arrive (whereas the read update comes faster alone).
|
|
class PossibleGap:
|
|
__slots__ = ('deadline', 'updates')
|
|
|
|
def __init__(
|
|
self,
|
|
deadline: float,
|
|
# Pending updates (those with a larger PTS, producing the gap which may later be filled).
|
|
updates: list # of updates
|
|
):
|
|
self.deadline = deadline
|
|
self.updates = updates
|
|
|
|
|
|
# Represents a "message box" (event `pts` for a specific entry).
|
|
#
|
|
# See https://core.telegram.org/api/updates#message-related-event-sequences.
|
|
class MessageBox:
|
|
__slots__ = ('map', 'date', 'seq', 'next_deadline', 'possible_gaps', 'getting_diff_for', 'reset_deadlines_for')
|
|
|
|
def __init__(
|
|
self,
|
|
# Map each entry to their current state.
|
|
map: dict = _sentinel, # entry -> state
|
|
|
|
# Additional fields beyond PTS needed by `ENTRY_ACCOUNT`.
|
|
date: datetime.datetime = datetime.datetime(*time.gmtime(0)[:6]).replace(tzinfo=datetime.timezone.utc),
|
|
seq: int = NO_SEQ,
|
|
|
|
# Holds the entry with the closest deadline (optimization to avoid recalculating the minimum deadline).
|
|
next_deadline: object = None, # entry
|
|
|
|
# Which entries have a gap and may soon trigger a need to get difference.
|
|
#
|
|
# If a gap is found, stores the required information to resolve it (when should it timeout and what updates
|
|
# should be held in case the gap is resolved on its own).
|
|
#
|
|
# Not stored directly in `map` as an optimization (else we would need another way of knowing which entries have
|
|
# a gap in them).
|
|
possible_gaps: dict = _sentinel, # entry -> possiblegap
|
|
|
|
# For which entries are we currently getting difference.
|
|
getting_diff_for: set = _sentinel, # entry
|
|
|
|
# Temporarily stores which entries should have their update deadline reset.
|
|
# Stored in the message box in order to reuse the allocation.
|
|
reset_deadlines_for: set = _sentinel # entry
|
|
):
|
|
self.map = {} if map is _sentinel else map
|
|
self.date = date
|
|
self.seq = seq
|
|
self.next_deadline = next_deadline
|
|
self.possible_gaps = {} if possible_gaps is _sentinel else possible_gaps
|
|
self.getting_diff_for = set() if getting_diff_for is _sentinel else getting_diff_for
|
|
self.reset_deadlines_for = set() if reset_deadlines_for is _sentinel else reset_deadlines_for
|
|
|
|
# region Creation, querying, and setting base state.
|
|
|
|
def load(self, session_state, channel_states):
|
|
"""
|
|
Create a [`MessageBox`] from a previously known update state.
|
|
"""
|
|
deadline = next_updates_deadline()
|
|
|
|
self.map.clear()
|
|
if session_state.pts != NO_SEQ:
|
|
self.map[ENTRY_ACCOUNT] = State(pts=session_state.pts, deadline=deadline)
|
|
if session_state.qts != NO_SEQ:
|
|
self.map[ENTRY_SECRET] = State(pts=session_state.qts, deadline=deadline)
|
|
self.map.update((s.channel_id, State(pts=s.pts, deadline=deadline)) for s in channel_states)
|
|
|
|
self.date = datetime.datetime.fromtimestamp(session_state.date).replace(tzinfo=datetime.timezone.utc)
|
|
self.seq = session_state.seq
|
|
self.next_deadline = ENTRY_ACCOUNT
|
|
|
|
def session_state(self):
|
|
"""
|
|
Return the current state.
|
|
|
|
This should be used for persisting the state.
|
|
"""
|
|
return dict(
|
|
pts=self.map[ENTRY_ACCOUNT].pts if ENTRY_ACCOUNT in self.map else NO_SEQ,
|
|
qts=self.map[ENTRY_SECRET].pts if ENTRY_SECRET in self.map else NO_SEQ,
|
|
date=self.date,
|
|
seq=self.seq,
|
|
), {id: state.pts for id, state in self.map.items() if isinstance(id, int)}
|
|
|
|
def is_empty(self) -> bool:
|
|
"""
|
|
Return true if the message box is empty and has no state yet.
|
|
"""
|
|
return ENTRY_ACCOUNT not in self.map
|
|
|
|
def check_deadlines(self):
|
|
"""
|
|
Return the next deadline when receiving updates should timeout.
|
|
|
|
If a deadline expired, the corresponding entries will be marked as needing to get its difference.
|
|
While there are entries pending of getting their difference, this method returns the current instant.
|
|
"""
|
|
now = asyncio.get_running_loop().time()
|
|
|
|
if self.getting_diff_for:
|
|
return now
|
|
|
|
deadline = next_updates_deadline()
|
|
|
|
# Most of the time there will be zero or one gap in flight so finding the minimum is cheap.
|
|
if self.possible_gaps:
|
|
deadline = min(deadline, *(gap.deadline for gap in self.possible_gaps.values()))
|
|
elif self.next_deadline in self.map:
|
|
deadline = min(deadline, self.map[self.next_deadline].deadline)
|
|
|
|
if now > deadline:
|
|
# Check all expired entries and add them to the list that needs getting difference.
|
|
self.getting_diff_for.update(entry for entry, gap in self.possible_gaps.items() if now > gap.deadline)
|
|
self.getting_diff_for.update(entry for entry, state in self.map.items() if now > state.deadline)
|
|
|
|
# When extending `getting_diff_for`, it's important to have the moral equivalent of
|
|
# `begin_get_diff` (that is, clear possible gaps if we're now getting difference).
|
|
for entry in self.getting_diff_for:
|
|
self.possible_gaps.pop(entry, None)
|
|
|
|
return deadline
|
|
|
|
# Reset the deadline for the periods without updates for a given entry.
|
|
#
|
|
# It also updates the next deadline time to reflect the new closest deadline.
|
|
def reset_deadline(self, entry, deadline):
|
|
if entry in self.map:
|
|
self.map[entry].deadline = deadline
|
|
# TODO figure out why not in map may happen
|
|
|
|
if self.next_deadline == entry:
|
|
# If the updated deadline was the closest one, recalculate the new minimum.
|
|
self.next_deadline = min(self.map.items(), key=lambda entry_state: entry_state[1].deadline)[0]
|
|
elif self.next_deadline in self.map and deadline < self.map[self.next_deadline].deadline:
|
|
# If the updated deadline is smaller than the next deadline, change the next deadline to be the new one.
|
|
self.next_deadline = entry
|
|
# else an unrelated deadline was updated, so the closest one remains unchanged.
|
|
|
|
# Convenience to reset a channel's deadline, with optional timeout.
|
|
def reset_channel_deadline(self, channel_id, timeout):
|
|
self.reset_deadline(channel_id, asyncio.get_running_loop().time() + (timeout or NO_UPDATES_TIMEOUT))
|
|
|
|
# Reset all the deadlines in `reset_deadlines_for` and then empty the set.
|
|
def apply_deadlines_reset(self):
|
|
next_deadline = next_updates_deadline()
|
|
|
|
reset_deadlines_for = self.reset_deadlines_for
|
|
self.reset_deadlines_for = set() # "move" the set to avoid self.reset_deadline() from touching it during iter
|
|
|
|
for entry in reset_deadlines_for:
|
|
self.reset_deadline(entry, next_deadline)
|
|
|
|
reset_deadlines_for.clear() # reuse allocation, the other empty set was a temporary dummy value
|
|
self.reset_deadlines_for = reset_deadlines_for
|
|
|
|
# Sets the update state.
|
|
#
|
|
# Should be called right after login if [`MessageBox::new`] was used, otherwise undesirable
|
|
# updates will be fetched.
|
|
def set_state(self, state):
|
|
deadline = next_updates_deadline()
|
|
|
|
if state.pts != NO_SEQ:
|
|
self.map[ENTRY_ACCOUNT] = State(pts=state.pts, deadline=deadline)
|
|
else:
|
|
self.map.pop(ENTRY_ACCOUNT, None)
|
|
|
|
if state.qts != NO_SEQ:
|
|
self.map[ENTRY_SECRET] = State(pts=state.qts, deadline=deadline)
|
|
else:
|
|
self.map.pop(ENTRY_SECRET, None)
|
|
|
|
self.date = state.date
|
|
self.seq = state.seq
|
|
|
|
# Like [`MessageBox::set_state`], but for channels. Useful when getting dialogs.
|
|
#
|
|
# The update state will only be updated if no entry was known previously.
|
|
def try_set_channel_state(self, id, pts):
|
|
if id not in self.map:
|
|
self.map[id] = State(pts=pts, deadline=next_updates_deadline())
|
|
|
|
# Begin getting difference for the given entry.
|
|
#
|
|
# Clears any previous gaps.
|
|
def begin_get_diff(self, entry):
|
|
self.getting_diff_for.add(entry)
|
|
self.possible_gaps.pop(entry, None)
|
|
|
|
# Finish getting difference for the given entry.
|
|
#
|
|
# It also resets the deadline.
|
|
def end_get_diff(self, entry):
|
|
try:
|
|
self.getting_diff_for.remove(entry)
|
|
except KeyError:
|
|
pass
|
|
self.reset_deadline(entry, next_updates_deadline())
|
|
assert entry not in self.possible_gaps, "gaps shouldn't be created while getting difference"
|
|
|
|
# endregion Creation, querying, and setting base state.
|
|
|
|
# region "Normal" updates flow (processing and detection of gaps).
|
|
|
|
# Process an update and return what should be done with it.
|
|
#
|
|
# Updates corresponding to entries for which their difference is currently being fetched
|
|
# will be ignored. While according to the [updates' documentation]:
|
|
#
|
|
# > Implementations [have] to postpone updates received via the socket while
|
|
# > filling gaps in the event and `Update` sequences, as well as avoid filling
|
|
# > gaps in the same sequence.
|
|
#
|
|
# In practice, these updates should have also been retrieved through getting difference.
|
|
#
|
|
# [updates documentation] https://core.telegram.org/api/updates
|
|
def process_updates(
|
|
self,
|
|
updates,
|
|
chat_hashes,
|
|
result, # out list of updates; returns list of user, chat, or raise if gap
|
|
):
|
|
date = getattr(updates, 'date', None)
|
|
if date is None:
|
|
# updatesTooLong is the only one with no date (we treat it as a gap)
|
|
raise GapError
|
|
|
|
seq = getattr(updates, 'seq', None) or NO_SEQ
|
|
seq_start = getattr(updates, 'seq_start', None) or seq
|
|
users = getattr(updates, 'users', None) or []
|
|
chats = getattr(updates, 'chats', None) or []
|
|
updates = getattr(updates, 'updates', None) or [updates]
|
|
|
|
# > For all the other [not `updates` or `updatesCombined`] `Updates` type constructors
|
|
# > there is no need to check `seq` or change a local state.
|
|
if seq_start != NO_SEQ:
|
|
if self.seq + 1 > seq_start:
|
|
# Skipping updates that were already handled
|
|
return (users, chats)
|
|
elif self.seq + 1 < seq_start:
|
|
# Gap detected
|
|
self.begin_get_diff(ENTRY_ACCOUNT)
|
|
raise GapError
|
|
# else apply
|
|
|
|
self.date = date
|
|
if seq != NO_SEQ:
|
|
self.seq = seq
|
|
|
|
result.extend(filter(None, (self.apply_pts_info(u, reset_deadline=True) for u in updates)))
|
|
|
|
self.apply_deadlines_reset()
|
|
|
|
def _sort_gaps(update):
|
|
pts = PtsInfo.from_update(update)
|
|
return pts.pts - pts.pts_count if pts else 0
|
|
|
|
if self.possible_gaps:
|
|
# For each update in possible gaps, see if the gap has been resolved already.
|
|
for key in list(self.possible_gaps.keys()):
|
|
self.possible_gaps[key].updates.sort(key=_sort_gaps)
|
|
|
|
for _ in range(len(self.possible_gaps[key].updates)):
|
|
update = self.possible_gaps[key].updates.pop(0)
|
|
|
|
# If this fails to apply, it will get re-inserted at the end.
|
|
# All should fail, so the order will be preserved (it would've cycled once).
|
|
update = self.apply_pts_info(update, reset_deadline=False)
|
|
if update:
|
|
result.append(update)
|
|
|
|
# Clear now-empty gaps.
|
|
self.possible_gaps = {entry: gap for entry, gap in self.possible_gaps.items() if gap.updates}
|
|
|
|
return (users, chats)
|
|
|
|
# Tries to apply the input update if its `PtsInfo` follows the correct order.
|
|
#
|
|
# If the update can be applied, it is returned; otherwise, the update is stored in a
|
|
# possible gap (unless it was already handled or would be handled through getting
|
|
# difference) and `None` is returned.
|
|
def apply_pts_info(
|
|
self,
|
|
update,
|
|
*,
|
|
reset_deadline,
|
|
):
|
|
pts = PtsInfo.from_update(update)
|
|
if not pts:
|
|
# No pts means that the update can be applied in any order.
|
|
return update
|
|
|
|
# As soon as we receive an update of any form related to messages (has `PtsInfo`),
|
|
# the "no updates" period for that entry is reset.
|
|
#
|
|
# Build the `HashSet` to avoid calling `reset_deadline` more than once for the same entry.
|
|
if reset_deadline:
|
|
self.reset_deadlines_for.add(pts.entry)
|
|
|
|
if pts.entry in self.getting_diff_for:
|
|
# Note: early returning here also prevents gap from being inserted (which they should
|
|
# not be while getting difference).
|
|
return None
|
|
|
|
if pts.entry in self.map:
|
|
local_pts = self.map[pts.entry].pts
|
|
if local_pts + pts.pts_count > pts.pts:
|
|
# Ignore
|
|
return None
|
|
elif local_pts + pts.pts_count < pts.pts:
|
|
# Possible gap
|
|
# TODO store chats too?
|
|
if pts.entry not in self.possible_gaps:
|
|
self.possible_gaps[pts.entry] = PossibleGap(
|
|
deadline=asyncio.get_running_loop().time() + POSSIBLE_GAP_TIMEOUT,
|
|
updates=[]
|
|
)
|
|
|
|
self.possible_gaps[pts.entry].updates.append(update)
|
|
return None
|
|
else:
|
|
# Apply
|
|
pass
|
|
else:
|
|
# No previous `pts` known, and because this update has to be "right" (it's the first one) our
|
|
# `local_pts` must be one less.
|
|
local_pts = pts.pts - 1
|
|
|
|
# For example, when we're in a channel, we immediately receive:
|
|
# * ReadChannelInbox (pts = X)
|
|
# * NewChannelMessage (pts = X, pts_count = 1)
|
|
#
|
|
# Notice how both `pts` are the same. If we stored the one from the first, then the second one would
|
|
# be considered "already handled" and ignored, which is not desirable. Instead, advance local `pts`
|
|
# by `pts_count` (which is 0 for updates not directly related to messages, like reading inbox).
|
|
if pts.entry in self.map:
|
|
self.map[pts.entry].pts = local_pts + pts.pts_count
|
|
else:
|
|
self.map[pts.entry] = State(pts=local_pts + pts.pts_count, deadline=next_updates_deadline())
|
|
|
|
return update
|
|
|
|
# endregion "Normal" updates flow (processing and detection of gaps).
|
|
|
|
# region Getting and applying account difference.
|
|
|
|
# Return the request that needs to be made to get the difference, if any.
|
|
def get_difference(self):
|
|
entry = ENTRY_ACCOUNT
|
|
if entry in self.getting_diff_for:
|
|
if entry in self.map:
|
|
return fn.updates.GetDifferenceRequest(
|
|
pts=self.map[ENTRY_ACCOUNT].pts,
|
|
pts_total_limit=None,
|
|
date=self.date,
|
|
qts=self.map[ENTRY_SECRET].pts if ENTRY_SECRET in self.map else NO_SEQ,
|
|
)
|
|
else:
|
|
# TODO investigate when/why/if this can happen
|
|
self.end_get_diff(entry)
|
|
|
|
return None
|
|
|
|
# Similar to [`MessageBox::process_updates`], but using the result from getting difference.
|
|
def apply_difference(
|
|
self,
|
|
diff,
|
|
chat_hashes,
|
|
):
|
|
if isinstance(diff, tl.updates.DifferenceEmpty):
|
|
self.date = diff.date
|
|
self.seq = diff.seq
|
|
self.end_get_diff(ENTRY_ACCOUNT)
|
|
return [], [], []
|
|
elif isinstance(diff, tl.updates.Difference):
|
|
self.end_get_diff(ENTRY_ACCOUNT)
|
|
chat_hashes.extend(diff.users, diff.chats)
|
|
return self.apply_difference_type(diff)
|
|
elif isinstance(diff, tl.updates.DifferenceSlice):
|
|
chat_hashes.extend(diff.users, diff.chats)
|
|
return self.apply_difference_type(diff)
|
|
elif isinstance(diff, tl.updates.DifferenceTooLong):
|
|
# TODO when are deadlines reset if we update the map??
|
|
self.map[ENTRY_ACCOUNT].pts = diff.pts
|
|
self.end_get_diff(ENTRY_ACCOUNT)
|
|
return [], [], []
|
|
|
|
def apply_difference_type(
|
|
self,
|
|
diff,
|
|
):
|
|
state = getattr(diff, 'intermediate_state', None) or diff.state
|
|
self.set_state(state)
|
|
|
|
for u in diff.other_updates:
|
|
if isinstance(u, tl.UpdateChannelTooLong):
|
|
self.begin_get_diff(u.channel_id)
|
|
|
|
diff.other_updates.extend(tl.UpdateNewMessage(
|
|
message=m,
|
|
pts=NO_SEQ,
|
|
pts_count=NO_SEQ,
|
|
) for m in diff.new_messages)
|
|
diff.other_updates.extend(tl.UpdateNewEncryptedMessage(
|
|
message=m,
|
|
qts=NO_SEQ,
|
|
) for m in diff.new_encrypted_messages)
|
|
|
|
return diff.other_updates, diff.users, diff.chats
|
|
|
|
# endregion Getting and applying account difference.
|
|
|
|
# region Getting and applying channel difference.
|
|
|
|
# Return the request that needs to be made to get a channel's difference, if any.
|
|
def get_channel_difference(
|
|
self,
|
|
chat_hashes,
|
|
):
|
|
entry = next((id for id in self.getting_diff_for if isinstance(id, int)), None)
|
|
if not entry:
|
|
return None
|
|
|
|
packed = chat_hashes.get(entry)
|
|
if not packed:
|
|
# Cannot get channel difference as we're missing its hash
|
|
self.end_get_diff(entry)
|
|
# Remove the outdated `pts` entry from the map so that the next update can correct
|
|
# it. Otherwise, it will spam that the access hash is missing.
|
|
self.map.pop(entry, None)
|
|
return None
|
|
|
|
state = self.map.get(entry)
|
|
if not state:
|
|
# TODO investigate when/why/if this can happen
|
|
# Cannot get channel difference as we're missing its pts
|
|
self.end_get_diff(entry)
|
|
return None
|
|
|
|
return fn.updates.GetChannelDifferenceRequest(
|
|
force=False,
|
|
channel=tl.InputChannel(packed.id, packed.hash),
|
|
filter=tl.ChannelMessagesFilterEmpty(),
|
|
pts=state.pts,
|
|
limit=BOT_CHANNEL_DIFF_LIMIT if chat_hashes.self_bot else USER_CHANNEL_DIFF_LIMIT
|
|
)
|
|
|
|
# Similar to [`MessageBox::process_updates`], but using the result from getting difference.
|
|
def apply_channel_difference(
|
|
self,
|
|
request,
|
|
diff,
|
|
chat_hashes,
|
|
):
|
|
entry = request.channel.channel_id
|
|
self.possible_gaps.pop(entry, None)
|
|
|
|
if isinstance(diff, tl.updates.ChannelDifferenceEmpty):
|
|
assert diff.final
|
|
self.end_get_diff(entry)
|
|
self.map[entry].pts = diff.pts
|
|
return [], [], []
|
|
elif isinstance(diff, tl.updates.ChannelDifferenceTooLong):
|
|
assert diff.final
|
|
self.map[entry].pts = diff.dialog.pts
|
|
chat_hashes.extend(diff.users, diff.chats)
|
|
self.reset_channel_deadline(entry, diff.timeout)
|
|
# This `diff` has the "latest messages and corresponding chats", but it would
|
|
# be strange to give the user only partial changes of these when they would
|
|
# expect all updates to be fetched. Instead, nothing is returned.
|
|
return [], [], []
|
|
elif isinstance(diff, tl.updates.ChannelDifference):
|
|
if diff.final:
|
|
self.end_get_diff(entry)
|
|
|
|
self.map[entry].pts = diff.pts
|
|
diff.other_updates.extend(tl.UpdateNewMessage(
|
|
message=m,
|
|
pts=NO_SEQ,
|
|
pts_count=NO_SEQ,
|
|
) for m in diff.new_messages)
|
|
chat_hashes.extend(diff.users, diff.chats)
|
|
self.reset_channel_deadline(entry, None)
|
|
|
|
return diff.other_updates, diff.users, diff.chats
|
|
|
|
# endregion Getting and applying channel difference.
|