70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""SQLite database (Offline)
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"""
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import sqlite3
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import contextlib
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engine_type = 'offline'
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database = ""
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query_str = ""
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limit = 10
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paging = True
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result_template = 'key-value.html'
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def init(engine_settings):
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if 'query_str' not in engine_settings:
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raise ValueError('query_str cannot be empty')
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if not engine_settings['query_str'].lower().startswith('select '):
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raise ValueError('only SELECT query is supported')
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@contextlib.contextmanager
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def sqlite_cursor():
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"""Implements a `Context Manager`_ for a :py:obj:`sqlite3.Cursor`.
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Open database in read only mode: if the database doesn't exist.
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The default mode creates an empty file on the file system.
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see:
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* https://docs.python.org/3/library/sqlite3.html#sqlite3.connect
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* https://www.sqlite.org/uri.html
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"""
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global database # pylint: disable=global-statement
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uri = 'file:' + database + '?mode=ro'
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with contextlib.closing(sqlite3.connect(uri, uri=True)) as connect:
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connect.row_factory = sqlite3.Row
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with contextlib.closing(connect.cursor()) as cursor:
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yield cursor
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def search(query, params):
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global query_str, result_template # pylint: disable=global-statement
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results = []
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query_params = {
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'query': query,
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'wildcard': r'%' + query.replace(' ', r'%') + r'%',
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'limit': limit,
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'offset': (params['pageno'] - 1) * limit
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}
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query_to_run = query_str + ' LIMIT :limit OFFSET :offset'
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with sqlite_cursor() as cur:
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cur.execute(query_to_run, query_params)
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col_names = [cn[0] for cn in cur.description]
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for row in cur.fetchall():
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item = dict( zip(col_names, map(str, row)) )
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item['template'] = result_template
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logger.debug("append result --> %s", item)
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results.append(item)
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return results
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