Create SQLiteStorage for better abstraction

pyrogram/client/storage/sqlite_storage.py

@@ -0,0 +1,184 @@
+# Pyrogram - Telegram MTProto API Client Library for Python
+# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
+#
+# 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/>.
+
+import inspect
+import sqlite3
+import time
+from pathlib import Path
+from threading import Lock
+from typing import List, Tuple, Any
+
+from pyrogram.api import types
+from pyrogram.client.ext import utils
+from .storage import Storage
+
+
+def get_input_peer(peer_id: int, access_hash: int, peer_type: str):
+    if peer_type in ["user", "bot"]:
+        return types.InputPeerUser(
+            user_id=peer_id,
+            access_hash=access_hash
+        )
+
+    if peer_type == "group":
+        return types.InputPeerChat(
+            chat_id=-peer_id
+        )
+
+    if peer_type in ["channel", "supergroup"]:
+        return types.InputPeerChannel(
+            channel_id=utils.get_channel_id(peer_id),
+            access_hash=access_hash
+        )
+
+    raise ValueError("Invalid peer type: {}".format(peer_type))
+
+
+class SQLiteStorage(Storage):
+    VERSION = 2
+    USERNAME_TTL = 8 * 60 * 60
+
+    def __init__(self, name: str):
+        super().__init__(name)
+
+        self.conn = None  # type: sqlite3.Connection
+        self.lock = Lock()
+
+    def create(self):
+        with self.lock, self.conn:
+            with open(str(Path(__file__).parent / "schema.sql"), "r") as schema:
+                self.conn.executescript(schema.read())
+
+            self.conn.execute(
+                "INSERT INTO version VALUES (?)",
+                (self.VERSION,)
+            )
+
+            self.conn.execute(
+                "INSERT INTO sessions VALUES (?, ?, ?, ?, ?, ?)",
+                (2, None, None, 0, None, None)
+            )
+
+    def open(self):
+        raise NotImplementedError
+
+    def save(self):
+        self.date(int(time.time()))
+
+        with self.lock:
+            self.conn.commit()
+
+    def close(self):
+        with self.lock:
+            self.conn.close()
+
+    def delete(self):
+        raise NotImplementedError
+
+    def update_peers(self, peers: List[Tuple[int, int, str, str, str]]):
+        with self.lock:
+            self.conn.executemany(
+                "REPLACE INTO peers (id, access_hash, type, username, phone_number)"
+                "VALUES (?, ?, ?, ?, ?)",
+                peers
+            )
+
+    def get_peer_by_id(self, peer_id: int):
+        r = self.conn.execute(
+            "SELECT id, access_hash, type FROM peers WHERE id = ?",
+            (peer_id,)
+        ).fetchone()
+
+        if r is None:
+            raise KeyError("ID not found: {}".format(peer_id))
+
+        return get_input_peer(*r)
+
+    def get_peer_by_username(self, username: str):
+        r = self.conn.execute(
+            "SELECT id, access_hash, type, last_update_on FROM peers WHERE username = ?",
+            (username,)
+        ).fetchone()
+
+        if r is None:
+            raise KeyError("Username not found: {}".format(username))
+
+        if abs(time.time() - r[3]) > self.USERNAME_TTL:
+            raise KeyError("Username expired: {}".format(username))
+
+        return get_input_peer(*r[:3])
+
+    def get_peer_by_phone_number(self, phone_number: str):
+        r = self.conn.execute(
+            "SELECT id, access_hash, type FROM peers WHERE phone_number = ?",
+            (phone_number,)
+        ).fetchone()
+
+        if r is None:
+            raise KeyError("Phone number not found: {}".format(phone_number))
+
+        return get_input_peer(*r)
+
+    def _get(self):
+        attr = inspect.stack()[2].function
+
+        return self.conn.execute(
+            "SELECT {} FROM sessions".format(attr)
+        ).fetchone()[0]
+
+    def _set(self, value: Any):
+        attr = inspect.stack()[2].function
+
+        with self.lock, self.conn:
+            self.conn.execute(
+                "UPDATE sessions SET {} = ?".format(attr),
+                (value,)
+            )
+
+    def _accessor(self, value: Any = object):
+        return self._get() if value == object else self._set(value)
+
+    def dc_id(self, value: int = object):
+        return self._accessor(value)
+
+    def test_mode(self, value: bool = object):
+        return self._accessor(value)
+
+    def auth_key(self, value: bytes = object):
+        return self._accessor(value)
+
+    def date(self, value: int = object):
+        return self._accessor(value)
+
+    def user_id(self, value: int = object):
+        return self._accessor(value)
+
+    def is_bot(self, value: bool = object):
+        return self._accessor(value)
+
+    def version(self, value: int = object):
+        if value == object:
+            return self.conn.execute(
+                "SELECT number FROM version"
+            ).fetchone()[0]
+        else:
+            with self.lock, self.conn:
+                self.conn.execute(
+                    "UPDATE version SET number = ?",
+                    (value,)
+                )