mirror of https://gitlab.com/pamhyr/pamhyr2
143 lines
3.6 KiB
Python
143 lines
3.6 KiB
Python
# SQL.py -- Pamhyr
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# Copyright (C) 2023-2024 INRAE
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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# -*- coding: utf-8 -*-
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import os
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import logging
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import sqlite3
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from pathlib import Path
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from tools import timer, logger_exception
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logger = logging.getLogger()
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class SQL(object):
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def _init_db_file(self, db):
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exists = Path(db).exists()
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os.makedirs(
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os.path.dirname(db),
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exist_ok=True
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)
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self._db = sqlite3.connect(db, check_same_thread=False)
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self._cur = self._db.cursor()
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if not exists:
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self._create() # Create db
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self._save() # Save
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else:
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self._update() # Update db scheme if necessary
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self._load() # Load data
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def __init__(self, filename=None):
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self._db = None
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if filename is not None:
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self._init_db_file(filename)
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def commit(self):
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logger.debug("SQL - commit")
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self._db.commit()
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def _close(self):
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self.commit()
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self._db.close()
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def _fetch_string(self, s):
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return s.replace("'", "'")
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def _fetch_tuple(self, tup):
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res = []
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for v in tup:
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if type(v) is str:
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v = self._fetch_string(v)
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res.append(v)
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return res
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def _fetch_list(self, lst):
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res = []
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for v in lst:
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if type(v) is str:
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v = self._fetch_string(v)
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elif type(v) is tuple:
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v = self._fetch_tuple(v)
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res.append(v)
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return res
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def _fetch(self, res, one):
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if one:
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value = res.fetchone()
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else:
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value = res.fetchall()
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res = value
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if type(value) is list:
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res = self._fetch_list(value)
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elif type(value) is tuple:
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res = self._fetch_tuple(value)
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return res
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def _db_format(self, value):
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# Replace ''' by ''' to preserve SQL injection
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if type(value) is str:
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value = value.replace("'", "'")
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elif value is None:
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value = "NULL"
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return value
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@timer
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def execute(self, cmd, fetch_one=True, commit=False):
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logger.debug(f"SQL - {cmd}")
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value = None
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try:
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res = self._cur.execute(cmd)
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if commit:
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self._db.commit()
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value = self._fetch(res, fetch_one)
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except sqlite3.Warning as w:
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logger.warning(f"SQL - {cmd}")
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logger.warning(w)
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except sqlite3.Error as er:
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logger.error(f"SQL - {cmd}")
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logger_exception(er)
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except Exception as e:
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logger_exception(e)
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logger.debug(f" - {value}")
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return value
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def _create(self):
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logger.warning("TODO: Create")
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def _update(self):
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logger.warning("TODO: Update")
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def _save(self):
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logger.warning("TODO: Save")
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def _load(self):
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logger.warning("TODO: LOAD")
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