terom@22: # DeGAL - A pretty simple web image gallery
terom@22: # Copyright (C) 2007 Tero Marttila
terom@22: # http://marttila.de/~terom/degal/
terom@22: #
terom@22: # This program is free software; you can redistribute it and/or modify
terom@22: # it under the terms of the GNU General Public License as published by
terom@22: # the Free Software Foundation; either version 2 of the License, or
terom@22: # (at your option) any later version.
terom@22: #
terom@22: # This program is distributed in the hope that it will be useful,
terom@22: # but WITHOUT ANY WARRANTY; without even the implied warranty of
terom@22: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
terom@22: # GNU General Public License for more details.
terom@22: #
terom@22: # You should have received a copy of the GNU General Public License
terom@22: # along with this program; if not, write to the
terom@22: # Free Software Foundation, Inc.,
terom@22: # 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
terom@22: #
terom@22: 
terom@22: import sqlite3
terom@22: 
terom@24: conn = sqlite3.connect("db/degal.db")
terom@22: 
terom@22: def execute (expr, *args) :
terom@22:     c = conn.cursor()
terom@22:     c.execute(expr, args)
terom@22: 
terom@22:     return c
terom@22: 
terom@24: def execute_many (expr, iter) :
terom@24:     c = conn.cursor()
terom@24:     c.executemany(expr, iter)
terom@24: 
terom@24:     return c
terom@24: 
terom@26: def insert (expr, *args) :
terom@26:     return execute_commit(expr, *args).lastrowid
terom@26: 
terom@26: def insert_many (cb, expr, iter) :
terom@26:     """
terom@26:         Perform an executemany with the given iterator (which must yield (cb_val, args) tuples), calling the given callback with the args (cb_val, row_id)
terom@26:     """
terom@26: 
terom@26:     c = conn.cursor()
terom@26: 
terom@26:     c.executemany(expr, _lastrowid_adapter(c, iter, cb))
terom@26: 
terom@26:     return commit(c)
terom@26: 
terom@26: def _lastrowid_adapter (c, iter, cb) :
terom@26:     for val, args in iter :
terom@26:         yield args
terom@26: 
terom@26:         cb(val, c.lastrowid)
terom@26: 
terom@24: def commit (cursor) :
terom@24:     try :
terom@24:         cursor.execute("COMMIT")
terom@24:     except sqlite3.OperationalError :
terom@24:         pass    # ffs. INSERT just doesn't do anything otherwise
terom@24: 
terom@26:     return cursor
terom@24: 
terom@24: def execute_commit (expr, *args) :
terom@24:     return commit(execute(expr, *args))
terom@24: 
terom@24: def execute_commit_many (expr, iter) :
terom@24:     return commit(execute_many(expr, iter))
terom@22: 
terom@22: select = execute
terom@22: 
terom@24: delete = execute_commit
terom@24: 
terom@24: delete_many = execute_commit_many
terom@24: 
terom@22: cursor = conn.cursor
terom@22: