add news backend
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pandora/news/__init__.py
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pandora/news/__init__.py
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12
pandora/news/admin.py
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pandora/news/admin.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from django.contrib import admin
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import models
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class NewsAdmin(admin.ModelAdmin):
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search_fields = ['name', 'title']
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admin.site.register(models.News, NewsAdmin)
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119
pandora/news/managers.py
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pandora/news/managers.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from django.db.models import Q, Manager
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from ox.django.query import QuerySet
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import ox
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def parseCondition(condition, user):
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k = condition.get('key', 'name')
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k = {
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'user': 'user__username',
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}.get(k, k)
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if not k:
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k = 'name'
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v = condition['value']
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op = condition.get('operator')
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if not op:
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op = ''
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if op.startswith('!'):
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op = op[1:]
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exclude = True
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else:
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exclude = False
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if op == '-':
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q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}, user) \
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& parseCondition({'key': k, 'value': v[1], 'operator': '<'}, user)
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if exclude:
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return ~q
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else:
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return q
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if k == 'id':
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v = ox.from26(v)
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if isinstance(v, bool): #featured and public flag
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key = k
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elif k in ('id',):
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key = "%s%s" % (k, {
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'>': '__gt',
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'>=': '__gte',
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'<': '__lt',
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'<=': '__lte',
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}.get(op, ''))
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else:
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key = "%s%s" % (k, {
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'>': '__gt',
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'>=': '__gte',
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'<': '__lt',
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'<=': '__lte',
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'==': '__iexact',
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'=': '__icontains',
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'^': '__istartswith',
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'$': '__iendswith',
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}.get(op, '__icontains'))
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key = str(key)
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if exclude:
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q = ~Q(**{key: v})
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else:
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q = Q(**{key: v})
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return q
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def parseConditions(conditions, operator, user):
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'''
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conditions: [
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{
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value: "war"
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}
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{
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key: "year",
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value: "1970-1980,
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operator: "!="
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},
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{
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key: "country",
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value: "f",
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operator: "^"
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}
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],
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operator: "&"
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'''
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conn = []
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for condition in conditions:
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if 'conditions' in condition:
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q = parseConditions(condition['conditions'],
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condition.get('operator', '&'), user)
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if q:
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conn.append(q)
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pass
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else:
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conn.append(parseCondition(condition, user))
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if conn:
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q = conn[0]
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for c in conn[1:]:
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if operator == '|':
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q = q | c
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else:
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q = q & c
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return q
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return None
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class NewsManager(Manager):
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def get_query_set(self):
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return QuerySet(self.model)
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def find(self, data, user):
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#join query with operator
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qs = self.get_query_set()
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conditions = parseConditions(data.get('query', {}).get('conditions', []),
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data.get('query', {}).get('operator', '&'),
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user)
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if conditions:
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qs = qs.filter(conditions)
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if user:
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if not user.get_profile().get_level() in ('staff', 'admin'):
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qs = qs.filter(Q(public=True)|Q(user=user))
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else:
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qs = qs.filter(public=True)
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return qs
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50
pandora/news/models.py
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pandora/news/models.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division, with_statement
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from django.db import models
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from django.contrib.auth.models import User
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import ox
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import managers
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class News(models.Model):
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objects = managers.NewsManager()
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created = models.DateTimeField(auto_now_add=True)
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modified = models.DateTimeField(auto_now=True)
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user = models.ForeignKey(User)
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title = models.TextField()
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content = models.TextField()
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def editable(self, user):
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if user.is_authenticated():
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if user.get_profile().get_level() in ('staff', 'admin') or \
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self.user == user or \
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user.groups.filter(id__in=self.groups.all()).count() > 0:
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return True
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return False
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'''
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def save(self, *args, **kwargs):
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super(News, self).save(*args, **kwargs)
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'''
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def json(self, keys=None):
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j = {
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'user': self.user.username,
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'id': ox.to26(self.id),
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'title': self.title,
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'content': self.content,
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}
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if keys:
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for key in j.keys():
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if key not in keys:
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del j[key]
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return j
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def __unicode__(self):
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return u"%s/%s" %(self.created, self.title)
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192
pandora/news/views.py
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192
pandora/news/views.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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from django.conf import settings
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import ox
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from ox.utils import json
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from ox.django.decorators import login_required_json
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from ox.django.shortcuts import render_to_json_response, get_object_or_404_json, json_response
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from item.models import Item
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from api.actions import actions
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from item import utils
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from item.models import Item
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import models
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def parse_query(data, user):
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query = {}
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query['range'] = [0, 100]
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query['sort'] = [{'key':'in', 'operator':'+'}]
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for key in ('keys', 'group', 'range', 'sort', 'query'):
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if key in data:
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query[key] = data[key]
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query['qs'] = models.News.objects.find(query, user)
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if 'itemQuery' in data:
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item_query = Item.objects.find({'query': data['itemQuery']}, user)
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query['qs'] = query['qs'].filter(item__in=item_query)
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return query
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def news_sort_key(key):
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return {
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'text': 'value',
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'position': 'start',
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}.get(key, key)
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def order_query(qs, sort):
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order_by = []
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print sort
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for e in sort:
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operator = e['operator']
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if operator != '-':
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operator = ''
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key = {
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'duration': 'clip__duration',
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'in': 'start',
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'lightness': 'clip__lightness',
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'out': 'end',
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'saturation': 'clip__saturation',
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'volume': 'clip__volume',
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}.get(e['key'], e['key'])
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if key.startswith('clip:'):
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key = news_sort_key(e['key'][len('clip:'):])
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elif key not in ('start', 'end', 'value') and not key.startswith('clip__'):
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#key mgith need to be changed, see order_sort in item/views.py
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key = "item__sort__%s" % key
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order = '%s%s' % (operator, key)
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order_by.append(order)
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if order_by:
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qs = qs.order_by(*order_by, nulls_last=True)
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return qs
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def findNews(request):
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'''
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param data {
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query: ...
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itemQuery: ...
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}
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return {
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'status': {'code': int, 'text': string}
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'data': {
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newss = [{..}, {...}, ...]
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}
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}
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'''
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data = json.loads(request.POST['data'])
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response = json_response()
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query = parse_query(data, request.user)
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qs = order_query(query['qs'], query['sort'])
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if 'keys' in data:
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qs = qs[query['range'][0]:query['range'][1]]
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response['data']['items'] = [p.json(keys=data['keys']) for p in qs]
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elif 'position' in query:
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ids = [ox.to26(i.id) for i in qs]
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data['conditions'] = data['conditions'] + {
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'value': data['position'],
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'key': query['sort'][0]['key'],
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'operator': '^'
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}
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query = parse_query(data, request.user)
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qs = order_query(query['qs'], query['sort'])
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if qs.count() > 0:
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response['data']['position'] = utils.get_positions(ids, [qs[0].itemId])[0]
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elif 'positions' in data:
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ids = [ox.to26(i.id) for i in qs]
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response['data']['positions'] = utils.get_positions(ids, data['positions'])
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else:
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response['data']['items'] = qs.count()
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return render_to_json_response(response)
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actions.register(findNews)
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@login_required_json
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def addNews(request):
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'''
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param data {
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title: string,
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content: text,
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public: boolean
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}
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return {'status': {'code': int, 'text': string},
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'data': {
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id: 123,
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...
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}
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}
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'''
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data = json.loads(request.POST['data'])
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news = models.News(
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user=request.user,
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title=data['title'],
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content=data['content'],
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public=data['content'])
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news.save()
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response = json_response(news.json())
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return render_to_json_response(response)
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actions.register(addNews, cache=False)
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@login_required_json
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def removeNews(request):
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'''
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param data {
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ids: []
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}
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return {'status': {'code': int, 'text': string},
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'data': {
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}
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}
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'''
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response = json_response({})
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data = json.loads(request.POST['data'])
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failed = []
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ids = [ox.from26(i) for i in data['ids']]
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for a in models.News.objects.filter(id__in=ids):
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if a.editable(request.user):
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a.delete()
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else:
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failed.append(a.id)
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if failed:
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response = json_response(status=403, text='permission denied')
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response['data']['ids'] = [ox.to26(i) for i in failed]
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return render_to_json_response(response)
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actions.register(removeNews, cache=False)
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@login_required_json
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def editNews(request):
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'''
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param data {
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id:,
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title:
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content:
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public:
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}
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return {'status': {'code': int, 'text': string},
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'data': {
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id:
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...
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}
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}
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'''
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response = json_response({})
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data = json.loads(request.POST['data'])
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n = get_object_or_404_json(models.News, id=ox.from26(data['id']))
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if n.editable(request.user):
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for key in ('title', 'content', 'public'):
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if key in data:
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setattr(n, key, data[key])
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n.save()
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response['data'] = n.json()
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else:
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response = json_response(status=403, text='permission denied')
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return render_to_json_response(response)
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actions.register(editNews, cache=False)
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