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import logging
from struct import pack
import re
import base64
from pyrogram.file_id import FileId
from pymongo.errors import DuplicateKeyError
from umongo import Instance, Document, fields
from motor.motor_asyncio import AsyncIOMotorClient
from marshmallow.exceptions import ValidationError
from info import DATABASE_URI, DATABASE_NAME, COLLECTION_NAME, USE_CAPTION_FILTER, MAX_B_TN
from utils import get_settings, save_group_settings
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)
client = AsyncIOMotorClient(DATABASE_URI)
db = client[DATABASE_NAME]
instance = Instance.from_db(db)
@instance.register
class Media(Document):
file_id = fields.StrField(attribute='_id')
file_ref = fields.StrField(allow_none=True)
file_name = fields.StrField(required=True)
file_size = fields.IntField(required=True)
file_type = fields.StrField(allow_none=True)
mime_type = fields.StrField(allow_none=True)
caption = fields.StrField(allow_none=True)
class Meta:
indexes = ('$file_name', )
collection_name = COLLECTION_NAME
async def save_file(media):
"""Save file in database"""
# TODO: Find better way to get same file_id for same media to avoid duplicates
file_id, file_ref = unpack_new_file_id(media.file_id)
file_name = re.sub(r"(_|\-|\.|\+)", " ", str(media.file_name))
try:
file = Media(
file_id=file_id,
file_ref=file_ref,
file_name=file_name,
file_size=media.file_size,
file_type=media.file_type,
mime_type=media.mime_type,
caption=media.caption.html if media.caption else None,
)
except ValidationError:
logger.exception('Error occurred while saving file in database')
return False, 2
else:
try:
await file.commit()
except DuplicateKeyError:
logger.warning(
f'{getattr(media, "file_name", "NO_FILE")} is already saved in database'
)
return False, 0
else:
logger.info(f'{getattr(media, "file_name", "NO_FILE")} is saved to database')
return True, 1
async def get_search_results(chat_id, query, file_type=None, max_results=10, offset=0, filter=False):
"""For given query return (results, next_offset)"""
if chat_id is not None:
settings = await get_settings(int(chat_id))
try:
if settings['max_btn']:
max_results = 10
else:
max_results = int(MAX_B_TN)
except KeyError:
await save_group_settings(int(chat_id), 'max_btn', False)
settings = await get_settings(int(chat_id))
if settings['max_btn']:
max_results = 10
else:
max_results = int(MAX_B_TN)
query = query.strip()
#if filter:
#better ?
#query = query.replace(' ', r'(\s|\.|\+|\-|_)')
#raw_pattern = r'(\s|_|\-|\.|\+)' + query + r'(\s|_|\-|\.|\+)'
if not query:
raw_pattern = '.'
elif ' ' not in query:
raw_pattern = r'(\b|[\.\+\-_])' + query + r'(\b|[\.\+\-_])'
else:
raw_pattern = query.replace(' ', r'.*[\s\.\+\-_]')
try:
regex = re.compile(raw_pattern, flags=re.IGNORECASE)
except:
return []
if USE_CAPTION_FILTER:
filter = {'$or': [{'file_name': regex}, {'caption': regex}]}
else:
filter = {'file_name': regex}
if file_type:
filter['file_type'] = file_type
total_results = await Media.count_documents(filter)
next_offset = offset + max_results
if next_offset > total_results:
next_offset = ''
cursor = Media.find(filter)
# Sort by recent
cursor.sort('$natural', -1)
# Slice files according to offset and max results
cursor.skip(offset).limit(max_results)
# Get list of files
files = await cursor.to_list(length=max_results)
return files, next_offset, total_results
async def get_bad_files(query, file_type=None, filter=False):
"""For given query return (results, next_offset)"""
query = query.strip()
#if filter:
#better ?
#query = query.replace(' ', r'(\s|\.|\+|\-|_)')
#raw_pattern = r'(\s|_|\-|\.|\+)' + query + r'(\s|_|\-|\.|\+)'
if not query:
raw_pattern = '.'
elif ' ' not in query:
raw_pattern = r'(\b|[\.\+\-_])' + query + r'(\b|[\.\+\-_])'
else:
raw_pattern = query.replace(' ', r'.*[\s\.\+\-_]')
try:
regex = re.compile(raw_pattern, flags=re.IGNORECASE)
except:
return []
if USE_CAPTION_FILTER:
filter = {'$or': [{'file_name': regex}, {'caption': regex}]}
else:
filter = {'file_name': regex}
if file_type:
filter['file_type'] = file_type
total_results = await Media.count_documents(filter)
cursor = Media.find(filter)
# Sort by recent
cursor.sort('$natural', -1)
# Get list of files
files = await cursor.to_list(length=total_results)
return files, total_results
async def get_file_details(query):
filter = {'file_id': query}
cursor = Media.find(filter)
filedetails = await cursor.to_list(length=1)
return filedetails
def encode_file_id(s: bytes) -> str:
r = b""
n = 0
for i in s + bytes([22]) + bytes([4]):
if i == 0:
n += 1
else:
if n:
r += b"\x00" + bytes([n])
n = 0
r += bytes([i])
return base64.urlsafe_b64encode(r).decode().rstrip("=")
def encode_file_ref(file_ref: bytes) -> str:
return base64.urlsafe_b64encode(file_ref).decode().rstrip("=")
def unpack_new_file_id(new_file_id):
"""Return file_id, file_ref"""
decoded = FileId.decode(new_file_id)
file_id = encode_file_id(
pack(
"<iiqq",
int(decoded.file_type),
decoded.dc_id,
decoded.media_id,
decoded.access_hash
)
)
file_ref = encode_file_ref(decoded.file_reference)
return file_id, file_ref |