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storage.py
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93 lines (75 loc) · 2.46 KB
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#!/usr/bin/env python
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import psycopg2
latest_db_version = 0
log = logging.getLogger(__name__)
class Storage(object):
def __init__(self, db_path):
"""Setup the database
Runs an initial setup or migrations depending on whether a database file has already
been created
Args:
db_path (str): Path to the database (postgres)
"""
self.db_path = db_path
# Connect to the database
self.conn = psycopg2.connect(db_path)
self.cur = self.conn.cursor()
try:
self.cur.execute("SELECT current FROM migrations")
row = self.cur.fetchone()
if not row:
self._initial_setup()
# TODO: Migrations
except Exception:
# migrations table doesn't exist yet, this is a new database
self.conn.rollback()
self._initial_setup()
def _initial_setup(self):
"""Initial setup of the database"""
log.info("Performing initial database setup...")
# Migrations table #
# Holds information about database migrations
self.cur.execute(
"""
CREATE TABLE migrations (
current INTEGER PRIMARY KEY
)
"""
)
# Initial migration version
self.cur.execute(
"""
INSERT INTO migrations
(current)
VALUES (0)
"""
)
# FCP timers table #
self.cur.execute(
"""
CREATE TABLE fcp_timers (
proposal_num INTEGER PRIMARY KEY,
end_timestamp INTEGER NOT NULL
)
"""
)
self.cur.execute(
"""
CREATE UNIQUE INDEX fcp_timers_proposal_num ON fcp_timers (proposal_num)
"""
)
log.info("Database setup complete")