Tulir Asokan
82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
# -*- coding: future_fstrings -*-
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# mautrix-telegram - A Matrix-Telegram puppeting bridge
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# Copyright (C) 2018 Tulir Asokan
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from io import BytesIO
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import time
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import logging
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import magic
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from PIL import Image
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from sqlalchemy.exc import IntegrityError
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from telethon.tl.types import (Document, FileLocation, InputFileLocation,
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InputDocumentFileLocation)
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from telethon.errors import LocationInvalidError
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from ..db import TelegramFile as DBTelegramFile
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log = logging.getLogger("mau.util")
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def _convert_webp(file, to="png"):
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try:
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image = Image.open(BytesIO(file)).convert("RGBA")
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new_file = BytesIO()
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image.save(new_file, to)
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return f"image/{to}", new_file.getvalue()
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except Exception:
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log.exception(f"Failed to convert webp to {to}")
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return "image/webp", file
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async def transfer_file_to_matrix(db, client, intent, location):
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if isinstance(location, (Document, InputDocumentFileLocation)):
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id = f"{location.id}-{location.version}"
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elif isinstance(location, (FileLocation, InputFileLocation)):
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id = f"{location.volume_id}-{location.local_id}"
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else:
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return None
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db_file = DBTelegramFile.query.get(id)
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if db_file:
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return db_file
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try:
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file = await client.download_file_bytes(location)
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except LocationInvalidError:
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return None
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mime_type = magic.from_buffer(file, mime=True)
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image_converted = False
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if mime_type == "image/webp":
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mime_type, file = _convert_webp(file, to="png")
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image_converted = True
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uploaded = await intent.upload_file(file, mime_type)
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db_file = DBTelegramFile(id=id, mxc=uploaded["content_uri"],
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mime_type=mime_type, was_converted=image_converted,
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timestamp=int(time.time()))
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try:
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db.add(db_file)
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db.commit()
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except IntegrityError:
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log.exception("Integrity error while saving transferred file data. "
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"This was probably caused by two simultaneous transfers of the same file, "
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"and should not cause any problems.")
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return db_file
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