pandora/backend/managers.py
2009-08-16 14:23:29 +02:00

136 lines
4.6 KiB
Python

# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
import re
from datetime import datetime
from urllib2 import unquote
from django.contrib.auth.models import User
from django.core.exceptions import ObjectDoesNotExist
from django.db.models import Q, Manager
import models
def keyType(key):
if key in ('released'):
return "date"
if key in ('year', 'cast.length'):
return "int"
if key in ('rating', 'votes'):
return "float"
return "string"
class MovieManager(Manager):
def get_query_set(self):
return super(MovieManager, self).get_query_set()
def find(self, request):
'''
construct query set from q value in request,
also checks for lists.
range and order must be applied later
'''
for i in request.META['QUERY_STRING'].split('&'):
if i.startswith('q='):
q = i[2:]
op = ','
if '|' in q:
op = '|'
conditions = []
for e in q.split(op):
e = e.split(':')
if len(e) == 1: e = ['all'] + e
k, v = e
exclude = False
if v.startswith('!'):
v = v[1:]
exclude = True
if keyType(k) == "string":
startswith = v.startswith('^')
endswith = v.endswith('$')
if startswith and endswith:
v = v[1:-1]
k = '%s__iexact' % k
elif startswith:
v = v[1:]
k = '%s__istartswith' % k
elif v.endswith('$'):
v = v[:-1]
k = '%s__iendswith' % k
else:
k = '%s__icontains' % k
k = 'find__%s' % k
v = unquote(v)
if exclude:
conditions.append(~Q(**{k:v}))
else:
conditions.append(Q(**{k:v}))
else:
def parseDate(d):
while len(d) < 3:
d.append(1)
return datetime(*[int(i) for i in d])
#1960-1970
match = re.compile("(-?[\d\.]+?)-(-?[\d\.]+$)").findall(v)
if match:
v1 = match[0][0]
v2 = match[0][1]
if keyType(k) == "date":
v1 = parseDate(v1.split('.'))
v2 = parseDate(v2.split('.'))
if exclude: #!1960-1970
k1 = str('%s__lt' % k)
k2 = str('%s__gte' % k)
conditions.append(Q(**{k1:v1})|Q(**{k2:v2}))
else: #1960-1970
k1 = str('%s__gte' % k)
k2 = str('%s__lt' % k)
conditions.append(Q(**{k1:v1})&Q(**{k2:v2}))
else:
if keyType(k) == "date":
v = parseDate(v.split('.'))
k = str('%s' % k)
if exclude: #!1960
conditions.append(~Q(**{k:v}))
else: #1960
conditions.append(Q(**{k:v}))
#join query with operator
qs = self.get_query_set()
if conditions:
q = conditions[0]
for c in conditions[1:]:
if op == '|':
q = q | c
else:
q = q & c
qs = qs.filter(q)
# filter list, works for own or public lists
l = request.GET.get('l', 'all')
if l != "all":
l = l.split(":")
only_public = True
if not request.user.is_anonymous():
if len(l) == 1: l = [request.user.username] + l
if request.user.username == l[0]:
only_public = False
if len(l) == 2:
lqs = models.List.objects.filter(name=l[1], user__username=l[0])
if only_public:
lqs = qls.filter(public=True)
if lqs.count() == 1:
qs = qs.filter(listitem__list__id=lqs[0].id)
return qs
class ArchiveFileManager(Manager):
def get_query_set(self):
return super(UserFileManager, self).get_query_set()
def by_oshash(self, oshash):
q = self.get_query_set()
q.filter(movie_file__oshash=oshash)
if q.count() == 0:
raise models.UserFile.DoesNotExist("%s matching oshash %s does not exist." %
(models.UserFile._meta.object_name, oshash))
return q[0]