Thomas Peetz
117 lines
5.0 KiB
Python
117 lines
5.0 KiB
Python
"""
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Setup database connections
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"""
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import sqlite3
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import mariadb
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import logging.config
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from platformdirs import PlatformDirs
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from pathlib import Path
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import yaml
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def get_database_cursors(log, config: str):
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dirs = PlatformDirs(config)
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database_config = Path(dirs.user_config_dir, 'database-config.yaml')
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with open(database_config, 'rt') as f:
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db_config = yaml.safe_load(f.read())
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sqlite_db = db_config["sqlite"]["file"]
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log.info('using SQLite3 database {}'.format(sqlite_db))
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sqlite_conn = sqlite3.connect(sqlite_db, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
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mariadb_conn = mariadb.connect(
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host=db_config['mariadb']['host'],
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port=db_config['mariadb']['port'],
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user=db_config['mariadb']['user'],
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password=db_config['mariadb']['password'],
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database=db_config['mariadb']['database']
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)
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return sqlite_conn, mariadb_conn
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def create_tables(sqlite_conn, logger, recreate_db, scripts):
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logger.info('create_tables')
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for table_id in scripts:
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create_statement = scripts[table_id]['create']
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drop_statement = scripts[table_id]['drop']
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logger.debug(create_statement)
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cursor = sqlite_conn.cursor()
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if recreate_db:
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logger.debug(drop_statement)
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cursor.execute(drop_statement)
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cursor.execute(create_statement)
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def get_logger(level, config: str):
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dirs = PlatformDirs(config)
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logging_config = Path(dirs.user_config_dir, 'logging-config.yaml')
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with open(logging_config, 'rt') as f:
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config = yaml.safe_load(f.read())
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logging.config.dictConfig(config)
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logger = logging.getLogger('development')
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if level is not None:
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match level:
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case 0:
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logger.setLevel(logging.INFO)
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case 1:
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logger.setLevel(logging.DEBUG)
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case _:
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logger.setLevel(logging.CRITICAL)
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return logger
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def get_meta_data(mariadb_conn):
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mariadb_cursor = mariadb_conn.cursor()
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select_statement = "SELECT id, table_name FROM meta_data_table"
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mariadb_cursor.execute(select_statement)
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rows = mariadb_cursor.fetchall()
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meta_data = {}
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for (identifier, table_name) in rows:
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table_data = {"name": table_name}
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mariadb_cursor.execute("SELECT column_name, column_sync_name, column_type, column_modifier, column_order FROM meta_data_column WHERE table_id=?", (identifier, ))
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column_rows = mariadb_cursor.fetchall()
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column_list = []
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for (column_name, column_sync_name, column_type, column_modifier, column_order) in column_rows:
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column_data = {"column_name": column_name, "column_sync_name": column_sync_name, "column_type": column_type,
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"column_modifier": column_modifier, "column_order": column_order}
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column_list.append(column_data)
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# logger.info(column_list)
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table_data["columns"] = column_list
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meta_data[identifier] = table_data
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return meta_data
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def get_scripts(meta_data, logger):
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scripts_map = {}
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for table_id in meta_data:
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table_scripts = {}
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m_columns = []
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s_columns = []
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columns = []
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for column_data in meta_data[table_id]["columns"]:
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column_line = "{} {}".format(column_data["column_sync_name"], column_data["column_type"])
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if column_data["column_modifier"]:
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column_line += " " + column_data["column_modifier"]
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columns.append(column_line)
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m_columns.append(column_data['column_name'])
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s_columns.append(column_data['column_sync_name'])
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table_name = meta_data[table_id]["name"]
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create_statement = "CREATE TABLE IF NOT EXISTS {} ({});".format(table_name, ", ".join(columns))
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drop_statement = 'DROP TABLE IF EXISTS {}'.format(table_name)
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select_mariadb_statement = 'SELECT {} FROM {}'.format(', '.join(m_columns), table_name)
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select_sqlite_statement = 'SELECT {} FROM {}'.format(', '.join(s_columns), table_name)
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insert_sqlite_statement = 'INSERT INTO {}({}) VALUES({})'.format(table_name, ', '.join(s_columns), ', '.join(['?']*len(s_columns)))
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insert_mariadb_statement = 'INSERT INTO {}({}) VALUES({})'.format(table_name, ', '.join(m_columns), ', '.join(['?']*len(m_columns)))
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truncate_mariadb_statement = 'TRUNCATE {}'.format(table_name)
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#logger.debug(create_statement)
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#logger.debug(select_mariadb_statement)
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table_scripts["create"] = create_statement
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table_scripts["drop"] = drop_statement
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table_scripts["select_mariadb"] = select_mariadb_statement
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table_scripts["select_sqlite"] = select_sqlite_statement
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table_scripts["insert_sqlite"] = insert_sqlite_statement
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table_scripts["insert_mariadb"] = insert_mariadb_statement
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table_scripts["truncate_mariadb"] = truncate_mariadb_statement
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table_scripts["count"] = "SELECT COUNT(*) FROM {}".format(table_name)
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table_scripts["name"] = table_name
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scripts_map[table_id] = table_scripts
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return scripts_map
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