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# Pyrogram - Telegram MTProto API Client Library for Python

# This file is part of Pyrogram.

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# Pyrogram is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

from typing import Union, List, AsyncGenerator, Optional

import pyrogram

from pyrogram import raw, types, utils, enums

# noinspection PyShadowingBuiltins

async def get_chunk(

client,

chat_id: Union[int, str],

query: str = "",

filter: "enums.MessagesFilter" = enums.MessagesFilter.EMPTY,

offset: int = 0,

limit: int = 100,

from_user: Union[int, str] = None

) -> List["types.Message"]:

r = await client.invoke(

raw.functions.messages.Search(

peer=await client.resolve_peer(chat_id),

q=query,

filter=filter.value(),

min_date=0,

max_date=0,

offset_id=0,

add_offset=offset,

limit=limit,

min_id=0,

max_id=0,

from_id=(

await client.resolve_peer(from_user)

if from_user

else None

hash=0

sleep_threshold=60

)

return await utils.parse_messages(client, r, replies=0)

class SearchMessages:

# noinspection PyShadowingBuiltins

async def search_messages(

self: "pyrogram.Client",

chat_id: Union[int, str],

query: str = "",

offset: int = 0,

filter: "enums.MessagesFilter" = enums.MessagesFilter.EMPTY,

limit: int = 0,

from_user: Union[int, str] = None

) -> Optional[AsyncGenerator["types.Message", None]]:

"""Search for text and media messages inside a specific chat.

If you want to get the messages count only, see :meth:`~pyrogram.Client.search_messages_count`.

.. include:: /_includes/usable-by/users.rst

Parameters:

chat_id (``int`` | ``str``):

Unique identifier (int) or username (str) of the target chat.

For your personal cloud (Saved Messages) you can simply use "me" or "self".

For a contact that exists in your Telegram address book you can use his phone number (str).

query (``str``, *optional*):

Text query string.

Required for text-only messages, optional for media messages (see the ``filter`` argument).

When passed while searching for media messages, the query will be applied to captions.

Defaults to "" (empty string).

offset (``int``, *optional*):

Sequential number of the first message to be returned.

Defaults to 0.

filter (:obj:`~pyrogram.enums.MessagesFilter`, *optional*):

Pass a filter in order to search for specific kind of messages only.

Defaults to any message (no filter).

limit (``int``, *optional*):

Limits the number of messages to be retrieved.

By default, no limit is applied and all messages are returned.

from_user (``int`` | ``str``, *optional*):

Unique identifier (int) or username (str) of the target user you want to search for messages from.

Returns:

``Generator``: A generator yielding :obj:`~pyrogram.types.Message` objects.

Example:

.. code-block:: python

from pyrogram import enums

# Search for text messages in chat. Get the last 120 results

async for message in app.search_messages(chat_id, query="hello", limit=120):

print(message.text)

# Search for pinned messages in chat

async for message in app.search_messages(chat_id, filter=enums.MessagesFilter.PINNED):

print(message.text)

# Search for messages containing "hello" sent by yourself in chat

async for message in app.search_messages(chat, "hello", from_user="me"):

print(message.text)

"""

current = 0

total = abs(limit) or (1 << 31) - 1

limit = min(100, total)

while True:

messages = await get_chunk(

client=self,

chat_id=chat_id,

query=query,

filter=filter,

offset=offset,

limit=limit,

from_user=from_user

)

if not messages:

return

offset += len(messages)

for message in messages:

yield message

current += 1

if current >= total:

return

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