ems/src/modules/database.py

'''
Created on 26.11.2013

@author: Philipp Rauch
'''
from MySQLdb import connect

def setup(conf):
    '''
    establishes a connection to the database and returns a cursor

    @return: cursor to the database
    '''
    connection = connect(host = conf['mySQL_server'],
                        user = conf['mySQL_user'],
                        passwd = conf['mySQL_pass'],
                        db = conf['mySQL_database'],
                        port = int(conf['mySQL_port']))
    cursor = connection.cursor()
    return cursor

def loop(cursor, item):
    '''


    '''
    sql_values = 'SELECT * FROM %s ORDER BY DateTime DESC LIMIT 1'
    sql_collums = 'SHOW COLUMNS FROM %s'

    path = item.split('/')
    if path[0] == '':
        path.remove('')

    collums = []
    cursor.execute(sql_collums % path[len(path) -1])
    for cul in cursor:
        collums.append(cul[0])

    cursor.execute(sql_values % path[len(path) -1])
    for row in cursor:
        values = row

    result = {}
    for i in range(len(collums)):
        result[collums[i]] = values[i]

#     for p in range(len(path)):
#         result = { path.pop() : result }
    result = {item : result}

    return result

def close(cursor):
    pass