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# python import
import logging
# get application logger
logger = logging.getLogger('atoidejouer')
# sqlite import
import sqlite3;
# atoidejouer import
from atoidejouer.tools import storage
class Key(object):
def __init__(self, id=None, name=None, type=None, time=-1, layer=-1, media=None):
self.id, self.name, self.type, self.media = id, name, type, media
self.time = 0 if time is None else time
self.layer = 0 if layer is None else layer
def __repr__(self):
return "name=%s|type=%s|time=%s|layer=%s|media=%s"\
% (self.name, self.type, self.time, self.layer, self.media)
def __cmp__(self, other):
return cmp(
(self.name, self.type, self.time, self.layer, self.media),
(other.name, other.type, other.time, other.layer, other.media)
)
def create(self):
return "create table story("\
"id integer primary key autoincrement not null,"\
"name text,"\
"type text,"\
"time integer,"\
"layer integer,"\
"media text"\
")"
def insert(self):
columns = list()
values = list()
for c in ['name', 'type', 'time', 'layer', 'media']:
v = getattr(self, c)
if v and v != -1:
columns.append(c)
values.append(str(v) if c in ['time', 'layer'] else "'%s'" % v)
return "insert into story (%s) values (%s)" % (
",".join(columns),
",".join(values)
)
def _params(self, crit, joiner=" "):
values = list()
for c in ['name', 'type', 'time', 'layer', 'media']:
v = getattr(self, c)
if v and v != -1:
v = v if v in ['time', 'layer'] else "'%s'" % v
values.append("%s=%s" % (c, v))
return "%s %s" % (crit, joiner.join(values))
def where(self):
"""Prepares simple where query according OO parameters.
"""
return self._params("where")
def set(self):
"""Prepares simple where query according OO parameters.
"""
return self._params("set", joiner=",")
def select(self):
"""Prepares simple select query according OO parameters.
"""
return "select * from story %s" % self.where()
def update(self):
return "update story %s where id=%s" % (self.set(), self.id)
def delete(self, all=False):
"""Prepares simple delete query according OO parameters.
"""
q = "delete from story"
if all is True:
return q
else:
return "%s %s" % (q, self.where())
class DB(object):
class __Singleton:
def __init__(self, config=None, name="story", obj=Key):
self.name, self.obj = name, obj
db_path = storage.get_db_path('default')
self.con = sqlite3.connect(db_path,
detect_types=sqlite3.PARSE_DECLTYPES)
self.con.row_factory = sqlite3.Row
self.__check()
def __check(self):
cur = self.con.cursor()
# remove all first
try:
cur.execute("drop table %s" % self.name)
except Exception, e:
pass
# create fresh db
cur.execute(self.obj().create())
# and close
cur.close()
def add(self, obj):
cur = self.con.cursor()
cur.execute(obj.insert())
count = cur.rowcount
cur.close()
return count
def _fetch(self, cur):
row = cur.fetchone()
while(row):
yield self.obj(**row)
row = cur.fetchone()
def all(self):
cur = self.con.cursor()
cur.execute("select * from story")
for obj in self._fetch(cur):
yield obj
cur.close()
def get(self, obj):
cur = self.con.cursor()
cur.execute(obj.select())
for obj in self._fetch(cur):
yield obj
cur.close()
def update(self, obj):
cur = self.con.cursor()
cur.execute(obj.update())
rowcount = cur.rowcount
cur.close()
return rowcount
def _del(self, obj=None, all=False):
cur = self.con.cursor()
obj = self.obj() if obj is None else obj
cur.execute(obj.delete(all=all))
rowcount = cur.rowcount
cur.close()
return rowcount
# singleton instance
instance = None
def __new__(c, force=False):
"""Singleton new init.
"""
# if doesn't already initialized
if not DB.instance\
or force is True:
# create a new instance
DB.instance = DB.__Singleton()
# return the manager object
return DB.instance
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