Merge branch 'master' into sync

telethon/client/auth.py

@@ -193,7 +193,7 @@ class AuthMethods(MessageParseMethods, UserMethods):
         return self
 
     def sign_in(
-            self, phone=None, *, code=None, password=None,
+            self, phone=None, code=None, *, password=None,
             bot_token=None, phone_code_hash=None):
         """
         Starts or completes the sign in process with the given phone number

telethon/client/messages.py

@@ -22,7 +22,7 @@ class MessageMethods(UploadMethods, MessageParseMethods):
             self, entity, limit=None, *, offset_date=None, offset_id=0,
             max_id=0, min_id=0, add_offset=0, search=None, filter=None,
             from_user=None, batch_size=100, wait_time=None, ids=None,
-            _total=None):
+            reverse=False, _total=None):
         """
         Iterator over the message history for the specified entity.
 
@@ -91,6 +91,15 @@ class MessageMethods(UploadMethods, MessageParseMethods):
                 will appear in its place, so that zipping the list of IDs
                 with the messages can match one-to-one.
 
+            reverse (`bool`, optional):
+                If set to ``True``, the messages will be returned in reverse
+                order (from oldest to newest, instead of the default newest
+                to oldest). This also means that the meaning of `offset_id`
+                and `offset_date` parameters is reversed, although they will
+                still be exclusive. `min_id` becomes equivalent to `offset_id`
+                instead of being `max_id` as well since messages are returned
+                in ascending order.
+
             _total (`list`, optional):
                 A single-item list to pass the total parameter by reference.
 
@@ -112,6 +121,8 @@ class MessageMethods(UploadMethods, MessageParseMethods):
         if ids:
             if not utils.is_list_like(ids):
                 ids = (ids,)
+            if reverse:
+                ids = list(reversed(ids))
             for x in self._iter_ids(entity, ids, total=_total):
                 yield (x)
             return
@@ -121,10 +132,26 @@ class MessageMethods(UploadMethods, MessageParseMethods):
         #
         # We can emulate their behaviour locally by setting offset = max_id
         # and simply stopping once we hit a message with ID <= min_id.
-        offset_id = max(offset_id, max_id)
-        if offset_id and min_id:
-            if offset_id - min_id <= 1:
-                return
+        if reverse:
+            offset_id = max(offset_id, min_id)
+            if offset_id and max_id:
+                if max_id - offset_id <= 1:
+                    print('suck lol')
+                    return
+
+            if not max_id:
+                max_id = float('inf')
+        else:
+            offset_id = max(offset_id, max_id)
+            if offset_id and min_id:
+                if offset_id - min_id <= 1:
+                    return
+
+        if reverse:
+            if offset_id:
+                offset_id += 1
+            else:
+                offset_id = 1
 
         from_id = None
         limit = float('inf') if limit is None else int(limit)
@@ -139,7 +166,7 @@ class MessageMethods(UploadMethods, MessageParseMethods):
                 max_date=offset_date,
                 offset_id=offset_id,
                 add_offset=add_offset,
-                limit=1,
+                limit=0,  # Search actually returns 0 items if we ask it to
                 max_id=0,
                 min_id=0,
                 hash=0,
@@ -182,12 +209,24 @@ class MessageMethods(UploadMethods, MessageParseMethods):
             wait_time = 1 if limit > 3000 else 0
 
         have = 0
-        last_id = float('inf')
-        batch_size = min(max(batch_size, 1), 100)
+        last_id = 0 if reverse else float('inf')
+
+        # Telegram has a hard limit of 100.
+        # We don't need to fetch 100 if the limit is less.
+        batch_size = min(max(batch_size, 1), min(100, limit))
+
+        # Use a negative offset to work around reversing the results
+        if reverse:
+            request.add_offset -= batch_size
+
         while have < limit:
             start = time.time()
-            # Telegram has a hard limit of 100
+
             request.limit = min(limit - have, batch_size)
+            if reverse and request.limit != batch_size:
+                # Last batch needs special care if we're on reverse
+                request.add_offset += batch_size - request.limit + 1
+
             r = self(request)
             if _total:
                 _total[0] = getattr(r, 'count', len(r.messages))
@@ -195,19 +234,23 @@ class MessageMethods(UploadMethods, MessageParseMethods):
             entities = {utils.get_peer_id(x): x
                         for x in itertools.chain(r.users, r.chats)}
 
-            for message in r.messages:
-                if message.id <= min_id:
-                    return
-
+            messages = reversed(r.messages) if reverse else r.messages
+            for message in messages:
                 if (isinstance(message, types.MessageEmpty)
-                    or message.id >= last_id
-                        or (from_id and message.from_id != from_id)):
+                        or from_id and message.from_id != from_id):
                     continue
 
+                if reverse:
+                    if message.id <= last_id or message.id >= max_id:
+                        return
+                else:
+                    if message.id >= last_id or message.id <= min_id:
+                        return
+
                 # There has been reports that on bad connections this method
                 # was returning duplicated IDs sometimes. Using ``last_id``
                 # is an attempt to avoid these duplicates, since the message
-                # IDs are returned in descending order.
+                # IDs are returned in descending order (or asc if reverse).
                 last_id = message.id
 
                 yield (custom.Message(self, message, entities, entity))
@@ -216,11 +259,11 @@ class MessageMethods(UploadMethods, MessageParseMethods):
             if len(r.messages) < request.limit:
                 break
 
-            request.offset_id = r.messages[-1].id
             # Find the first message that's not empty (in some rare cases
             # it can happen that the last message is :tl:`MessageEmpty`)
             last_message = None
-            for m in reversed(r.messages):
+            messages = r.messages if reverse else reversed(r.messages)
+            for m in messages:
                 if not isinstance(m, types.MessageEmpty):
                     last_message = m
                     break
@@ -234,11 +277,16 @@ class MessageMethods(UploadMethods, MessageParseMethods):
                 # should just give up since there won't be any new Message.
                 break
             else:
+                request.offset_id = last_message.id
                 if isinstance(request, functions.messages.GetHistoryRequest):
                     request.offset_date = last_message.date
                 else:
                     request.max_date = last_message.date
 
+                if reverse:
+                    # We want to skip the one we already have
+                    request.add_offset -= 1
+
             time.sleep(
                 max(wait_time - (time.time() - start), 0))
 

telethon/client/telegrambaseclient.py

@@ -1,6 +1,7 @@
 import abc
 import logging
 import platform
+import queue
 import sys
 import threading
 import time
@@ -91,6 +92,17 @@ class TelegramBaseClient(abc.ABC):
             Whether reconnection should be retried `connection_retries`
             times automatically if Telegram disconnects us or not.
 
+        sequential_updates (`bool`, optional):
+            By default every incoming update will create a new task, so
+            you can handle several updates in parallel. Some scripts need
+            the order in which updates are processed to be sequential, and
+            this setting allows them to do so.
+
+            If set to ``True``, incoming updates will be put in a queue
+            and processed sequentially. This means your event handlers
+            should *not* perform long-running operations since new
+            updates are put inside of an unbounded queue.
+
         flood_sleep_threshold (`int` | `float`, optional):
             The threshold below which the library should automatically
             sleep on flood wait errors (inclusive). For instance, if a
@@ -138,6 +150,7 @@ class TelegramBaseClient(abc.ABC):
                  request_retries=5,
                  connection_retries=5,
                  auto_reconnect=True,
+                 sequential_updates=False,
                  flood_sleep_threshold=60,
                  device_model=None,
                  system_version=None,
@@ -226,6 +239,13 @@ class TelegramBaseClient(abc.ABC):
         self._last_request = time.time()
         self._channel_pts = {}
 
+        if sequential_updates:
+            self._updates_queue = queue.Queue()
+            self._dispatching_updates_queue = threading.Event()
+        else:
+            self._updates_queue = None
+            self._dispatching_updates_queue = None
+
         # Start with invalid state (-1) so we can have somewhere to store
         # the state, but also be able to determine if we are authorized.
         self._state = types.updates.State(-1, 0, datetime.now(), 0, -1)
@@ -279,7 +299,8 @@ class TelegramBaseClient(abc.ABC):
         """
         Returns ``True`` if the user has connected.
         """
-        return self._sender.is_connected()
+        sender = getattr(self, '_sender', None)
+        return sender and sender.is_connected()
 
     def disconnect(self):
         """

telethon/client/updates.py

@@ -168,7 +168,13 @@ class UpdateMethods(UserMethods):
             self._handle_update(update.update)
         else:
             update._entities = getattr(update, '_entities', {})
-            syncio.create_task(self._dispatch_update, update)
+            if self._updates_queue is None:
+                syncio.create_task(self._dispatch_update, update)
+            else:
+                self._updates_queue.put_nowait(update)
+                if not self._dispatching_updates_queue.is_set():
+                    self._dispatching_updates_queue.set()
+                    syncio.create_task(self._dispatch_queue_updates)
 
         need_diff = False
         if hasattr(update, 'pts'):
@@ -217,6 +223,12 @@ class UpdateMethods(UserMethods):
 
                 self(functions.updates.GetStateRequest())
 
+    def _dispatch_queue_updates(self):
+        while not self._updates_queue.empty():
+            self._dispatch_update(self._updates_queue.get_nowait())
+
+        self._dispatching_updates_queue.clear()
+
     def _dispatch_update(self, update):
         if self._events_pending_resolve:
             if self._event_resolve_lock.locked():

telethon/extensions/markdown.py

@@ -5,15 +5,12 @@ since they seem to count as two characters and it's a bit strange.
 """
 import re
 
+from ..helpers import add_surrogate, del_surrogate
 from ..tl import TLObject
 from ..tl.types import (
     MessageEntityBold, MessageEntityItalic, MessageEntityCode,
     MessageEntityPre, MessageEntityTextUrl
 )
-from ..utils import (
-    add_surrogate as _add_surrogate,
-    del_surrogate as _del_surrogate
-)
 
 DEFAULT_DELIMITERS = {
     '**': MessageEntityBold,
@@ -57,7 +54,7 @@ def parse(message, delimiters=None, url_re=None):
 
     # Work on byte level with the utf-16le encoding to get the offsets right.
     # The offset will just be half the index we're at.
-    message = _add_surrogate(message)
+    message = add_surrogate(message)
     while i < len(message):
         if url_re and current is None:
             # If we're not inside a previous match since Telegram doesn't allow
@@ -73,7 +70,7 @@ def parse(message, delimiters=None, url_re=None):
 
                 result.append(MessageEntityTextUrl(
                     offset=url_match.start(), length=len(url_match.group(1)),
-                    url=_del_surrogate(url_match.group(2))
+                    url=del_surrogate(url_match.group(2))
                 ))
                 i += len(url_match.group(1))
                 # Next loop iteration, don't check delimiters, since
@@ -128,7 +125,7 @@ def parse(message, delimiters=None, url_re=None):
             + message[current.offset:]
         )
 
-    return _del_surrogate(message), result
+    return del_surrogate(message), result
 
 
 def unparse(text, entities, delimiters=None, url_fmt=None):
@@ -156,7 +153,7 @@ def unparse(text, entities, delimiters=None, url_fmt=None):
     else:
         entities = tuple(sorted(entities, key=lambda e: e.offset, reverse=True))
 
-    text = _add_surrogate(text)
+    text = add_surrogate(text)
     delimiters = {v: k for k, v in delimiters.items()}
     for entity in entities:
         s = entity.offset
@@ -167,8 +164,8 @@ def unparse(text, entities, delimiters=None, url_fmt=None):
         elif isinstance(entity, MessageEntityTextUrl) and url_fmt:
             text = (
                 text[:s] +
-                _add_surrogate(url_fmt.format(text[s:e], entity.url)) +
+                add_surrogate(url_fmt.format(text[s:e], entity.url)) +
                 text[e:]
             )
 
-    return _del_surrogate(text)
+    return del_surrogate(text)

telethon/helpers.py

@@ -1,5 +1,6 @@
 """Various helpers not related to the Telegram API itself"""
 import os
+import struct
 from hashlib import sha1, sha256
 
 
@@ -17,6 +18,20 @@ def ensure_parent_dir_exists(file_path):
     if parent:
         os.makedirs(parent, exist_ok=True)
 
+
+def add_surrogate(text):
+    return ''.join(
+        # SMP -> Surrogate Pairs (Telegram offsets are calculated with these).
+        # See https://en.wikipedia.org/wiki/Plane_(Unicode)#Overview for more.
+        ''.join(chr(y) for y in struct.unpack('<HH', x.encode('utf-16le')))
+        if (0x10000 <= ord(x) <= 0x10FFFF) else x for x in text
+    )
+
+
+def del_surrogate(text):
+    return text.encode('utf-16', 'surrogatepass').decode('utf-16')
+
+
 # endregion
 
 # region Cryptographic related utils

telethon/utils.py

@@ -7,13 +7,12 @@ import math
 import mimetypes
 import os
 import re
-import struct
 import types
 from collections import UserList
 from mimetypes import guess_extension
 
 from .extensions import markdown, html
-from .tl import TLObject
+from .helpers import add_surrogate, del_surrogate
 from .tl.types import (
     Channel, ChannelForbidden, Chat, ChatEmpty, ChatForbidden, ChatFull,
     ChatPhoto, InputPeerChannel, InputPeerChat, InputPeerUser, InputPeerEmpty,
@@ -586,19 +585,6 @@ def _fix_peer_id(peer_id):
     return int(peer_id)
 
 
-def add_surrogate(text):
-    return ''.join(
-        # SMP -> Surrogate Pairs (Telegram offsets are calculated with these).
-        # See https://en.wikipedia.org/wiki/Plane_(Unicode)#Overview for more.
-        ''.join(chr(y) for y in struct.unpack('<HH', x.encode('utf-16le')))
-        if (0x10000 <= ord(x) <= 0x10FFFF) else x for x in text
-    )
-
-
-def del_surrogate(text):
-    return text.encode('utf-16', 'surrogatepass').decode('utf-16')
-
-
 def get_inner_text(text, entities):
     """
     Gets the inner text that's surrounded by the given entities.