terom@22: import sqlite3
terom@22: 
terom@47: try :
terom@47:     conn = sqlite3.connect("db/degal.db")
terom@47: 
terom@47: except sqlite3.OperationalError :
terom@47:     conn = None
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@47: if conn :
terom@47:     cursor = conn.cursor
terom@22: 
terom@47: