Move db to own package

mautrix_telegram/db/message.py

@@ -0,0 +1,87 @@
+# -*- coding: future_fstrings -*-
+# mautrix-telegram - A Matrix-Telegram puppeting bridge
+# Copyright (C) 2018 Tulir Asokan
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from sqlalchemy import Column, UniqueConstraint, Integer, String, and_, func, select
+from sqlalchemy.engine.result import RowProxy
+from typing import Optional, List
+
+from ..types import MatrixRoomID, MatrixEventID, TelegramID
+from .base import Base
+
+
+class Message(Base):
+    __tablename__ = "message"
+
+    mxid = Column(String)  # type: MatrixEventID
+    mx_room = Column(String)  # type: MatrixRoomID
+    tgid = Column(Integer, primary_key=True)  # type: TelegramID
+    tg_space = Column(Integer, primary_key=True)  # type: TelegramID
+
+    __table_args__ = (UniqueConstraint("mxid", "mx_room", "tg_space", name="_mx_id_room"),)
+
+    @classmethod
+    def _one_or_none(cls, rows: RowProxy) -> Optional['Message']:
+        try:
+            mxid, mx_room, tgid, tg_space = next(rows)
+            return cls(mxid=mxid, mx_room=mx_room, tgid=tgid, tg_space=tg_space)
+        except StopIteration:
+            return None
+
+    @staticmethod
+    def _all(rows: RowProxy) -> List['Message']:
+        return [Message(mxid=row[0], mx_room=row[1], tgid=row[2], tg_space=row[3])
+                for row in rows]
+
+    @classmethod
+    def get_by_tgid(cls, tgid: TelegramID, tg_space: TelegramID) -> Optional['Message']:
+        return cls._select_one_or_none(and_(cls.c.tgid == tgid, cls.c.tg_space == tg_space))
+
+    @classmethod
+    def count_spaces_by_mxid(cls, mxid: MatrixEventID, mx_room: MatrixRoomID) -> int:
+        rows = cls.db.execute(select([func.count(cls.c.tg_space)])
+                              .where(and_(cls.c.mxid == mxid, cls.c.mx_room == mx_room)))
+        try:
+            count, = next(rows)
+            return count
+        except StopIteration:
+            return 0
+
+    @classmethod
+    def get_by_mxid(cls, mxid: MatrixEventID, mx_room: MatrixRoomID, tg_space: TelegramID
+                    ) -> Optional['Message']:
+        return cls._select_one_or_none(and_(cls.c.mxid == mxid,
+                                            cls.c.mx_room == mx_room,
+                                            cls.c.tg_space == tg_space))
+
+    @classmethod
+    def update_by_tgid(cls, s_tgid: TelegramID, s_tg_space: TelegramID, **values) -> None:
+        cls.db.execute(cls.t.update()
+                       .where(and_(cls.c.tgid == s_tgid, cls.c.tg_space == s_tg_space))
+                       .values(**values))
+
+    @classmethod
+    def update_by_mxid(cls, s_mxid: MatrixEventID, s_mx_room: MatrixRoomID, **values) -> None:
+        cls.db.execute(cls.t.update()
+                       .where(and_(cls.c.mxid == s_mxid, cls.c.mx_room == s_mx_room))
+                       .values(**values))
+
+    @property
+    def _edit_identity(self):
+        return and_(self.c.tgid == self.tgid, self.c.tg_space == self.tg_space)
+
+    def insert(self) -> None:
+        self.db.execute(self.t.insert().values(mxid=self.mxid, mx_room=self.mx_room, tgid=self.tgid,
+                                               tg_space=self.tg_space))