cablegates/pandora/item/managers.py

252 lines
7.5 KiB
Python

# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from datetime import datetime
from django.db.models import Q, Manager
from itemlist.models import List
import models
from ox.django.query import QuerySet
def parseCondition(condition):
'''
condition: {
value: "war"
}
or
condition: {
key: "year",
value: "1970-1980,
operator: "!="
}
...
'''
k = condition.get('key', 'all')
k = {'id': 'itemId'}.get(k, k)
if not k:
k = 'all'
v = condition['value']
op = condition.get('operator')
if not op:
op = ''
if op.startswith('!'):
op = op[1:]
exclude = True
else:
exclude = False
if op == '-':
q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}) \
& parseCondition({'key': k, 'value': v[1], 'operator': '<'})
if exclude:
return ~q
else:
return q
key_type = models.site_config()['keys'].get(k, {'type':'string'}).get('type')
if isinstance(key_type, list):
key_type = key_type[0]
key_type = {
'title': 'string',
'person': 'string',
'text': 'string',
'year': 'string',
'length': 'string',
'list': 'list'
}.get(key_type, key_type)
if k == 'list':
key_type = 'list'
if key_type == "string":
in_find=True
value_key = 'find__value'
if k in models.Item.facet_keys:
in_find = False
if op == '=' or op == '^$':
v = models.Item.objects.filter(facets__key=k, facets__value=v)
elif op == '^':
v = models.Item.objects.filter(facets__key=k, facets__value__istartswith=v)
elif op == '$':
v = models.Item.objects.filter(facets__key=k, facets__value__iendswith=v)
else:
v = models.Item.objects.filter(facets__key=k, facets__value__icontains=v)
k = 'id__in'
elif op == '=' or op == '^$':
value_key = 'find__value__iexact'
elif op == '^':
v = v[1:]
value_key = 'find__value__istartswith'
elif op == '$':
v = v[:-1]
value_key = 'find__value__iendswith'
else: # default
value_key = 'find__value__icontains'
k = str(k)
if exclude:
if k == 'all':
q = ~Q(**{value_key: v})
elif in_find and not k.startswith('itemId'):
q = ~Q(**{'find__key': k, value_key: v})
else:
q = ~Q(**{k: v})
else:
if k == 'all':
q = Q(**{value_key: v})
elif in_find and not k.startswith('itemId'):
q = Q(**{'find__key': k, value_key: v})
else:
q = Q(**{k: v})
return q
elif key_type == 'list':
q = Q(itemId=False)
l = v.split("/")
if len(l) == 2:
lqs = list(List.objects.filter(name=l[1], user__username=l[0]))
if len(lqs) == 1:
l = lqs[0]
if l.query.get('static', False) == False:
data = l.query
q = parseConditions(data.get('conditions', []),
data.get('operator', '&'))
else:
q = Q(id__in=l.items.all())
return q
else: #number or date
def parseDate(d):
while len(d) < 3:
d.append(1)
return datetime(*[int(i) for i in d])
if key_type == "date":
v = parseDate(v.split('.'))
if op == '=' or op == '^$':
vk = 'value__exact'
elif op == '>':
vk = 'value__gt'
elif op == '>=':
vk = 'value__gte'
elif op == '<':
vk = 'value__lt'
elif op == '<=':
vk = 'value__lte'
elif op == '':
vk = 'value__exact'
vk = 'find__%s' % vk
vk = str(vk)
if exclude: #!1960
return ~Q(**{'find__key': k, vk: v})
else: #1960
return Q(**{'find__key': k, vk: v})
def parseConditions(conditions, operator):
'''
conditions: [
{
value: "war"
}
{
key: "year",
value: "1970-1980,
operator: "!="
},
{
key: "country",
value: "f",
operator: "^"
}
],
operator: "&"
'''
conn = []
for condition in conditions:
if 'conditions' in condition:
q = parseConditions(condition['conditions'],
condition.get('operator', '&'))
if q:
conn.append(q)
pass
else:
if condition.get('value', '') != '' or \
condition.get('operator', '') == '=':
conn.append(parseCondition(condition))
if conn:
q = conn[0]
for c in conn[1:]:
if operator == '|':
q = q | c
else:
q = q & c
return q
return Q()
class ItemManager(Manager):
def get_query_set(self):
#return super(ItemManager, self).get_query_set()
return QuerySet(self.model)
def filter_list(self, qs, l, user):
if l != "all":
l = l.split(":")
only_public = True
if not user.is_anonymous():
if len(l) == 1:
l = [user.username] + l
if 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 = lqs.filter(Q(status='public')|Q(status='featured'))
if lqs.count() == 1:
if lqs[0].query:
data = lqs[0].query
conditions = parseConditions(data['query']['conditions'],
data['query'].get('operator', '&'))
qs = qs.filter(conditions)
else:
qs = qs.filter(id__in=lqs[0].items.all())
return qs
def find(self, data, user):
'''
query: {
conditions: [
{
value: "war"
}
{
key: "year",
value: "1970-1980,
operator: "!="
},
{
key: "country",
value: "f",
operator: "^"
}
],
operator: "&"
}
'''
#join query with operator
qs = self.get_query_set()
#only include items that have hard metadata
qs = qs.filter(available=True)
conditions = parseConditions(data.get('query', {}).get('conditions', []),
data.get('query', {}).get('operator', '&'))
qs = qs.filter(conditions).distinct()
#anonymous can only see public items
if user.is_anonymous():
qs = qs.filter(public=True)
#users can see public items, there own items and items of there groups
elif not user.is_staff:
qs = qs.filter(Q(public=True)|Q(user=user)|Q(groups__in=user.groups.all()))
#admins can see all available items
return qs