pandora/pandora/annotation/views.py
2012-01-10 01:56:16 +05:30

205 lines
6.2 KiB
Python

# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from __future__ import division
from django.conf import settings
import ox
from ox.utils import json
from ox.django.decorators import login_required_json
from ox.django.shortcuts import render_to_json_response, get_object_or_404_json, json_response
from item.models import Item
from ox.django.api import actions
from item import utils
from item.models import Item
import models
def parse_query(data, user):
query = {}
query['range'] = [0, 100]
query['sort'] = [{'key':'in', 'operator':'+'}]
for key in ('keys', 'group', 'range', 'sort', 'query'):
if key in data:
query[key] = data[key]
query['qs'] = models.Annotation.objects.find(query, user)
if 'itemsQuery' in data:
item_query = Item.objects.find({'query': data['itemsQuery']}, user)
query['qs'] = query['qs'].filter(item__in=item_query)
return query
def annotation_sort_key(key):
return {
'text': 'value',
'position': 'start',
}.get(key, key)
def order_query(qs, sort):
order_by = []
print sort
for e in sort:
operator = e['operator']
if operator != '-':
operator = ''
key = {
'duration': 'clip__duration',
'in': 'start',
'lightness': 'clip__lightness',
'out': 'end',
'saturation': 'clip__saturation',
'volume': 'clip__volume',
}.get(e['key'], e['key'])
if key.startswith('clip:'):
key = annotation_sort_key(e['key'][len('clip:'):])
elif key not in ('start', 'end', 'value') and not key.startswith('clip__'):
#key mgith need to be changed, see order_sort in item/views.py
key = "item__sort__%s" % key
order = '%s%s' % (operator, key)
order_by.append(order)
if order_by:
qs = qs.order_by(*order_by, nulls_last=True)
return qs
def findAnnotations(request):
'''
param data {
query: ...
itemsQuery: ...
}
return {
'status': {'code': int, 'text': string}
'data': {
annotations = [{..}, {...}, ...]
}
}
'''
data = json.loads(request.POST['data'])
response = json_response()
query = parse_query(data, request.user)
qs = order_query(query['qs'], query['sort'])
if 'keys' in data:
qs = qs.select_related()[query['range'][0]:query['range'][1]]
response['data']['items'] = [p.json(keys=data['keys']) for p in qs]
elif 'position' in query:
ids = [i.public_id for i in qs]
data['conditions'] = data['conditions'] + {
'value': data['position'],
'key': query['sort'][0]['key'],
'operator': '^'
}
query = parse_query(data, request.user)
qs = order_query(query['qs'], query['sort'])
if qs.count() > 0:
response['data']['position'] = utils.get_positions(ids, [qs[0].itemId])[0]
elif 'positions' in data:
ids = [i.public_id for i in qs]
response['data']['positions'] = utils.get_positions(ids, data['positions'])
else:
response['data']['items'] = qs.count()
return render_to_json_response(response)
actions.register(findAnnotations)
@login_required_json
def addAnnotation(request):
'''
param data {
item: itemId,
layer: layerId,
in: float,
out: float,
value: string
}
return {'status': {'code': int, 'text': string},
'data': {
id: 123, //id of new annotation
...
}
}
'''
data = json.loads(request.POST['data'])
for key in ('item', 'layer', 'in', 'out', 'value'):
if key not in data:
return render_to_json_response(json_response(status=400,
text='invalid data'))
item = get_object_or_404_json(Item, itemId=data['item'])
layer_id = data['layer']
layer = filter(lambda l: l['id'] == layer_id, settings.CONFIG['layers'])[0]
if layer['canAddAnnotations'].get(request.user.get_profile().get_level()):
annotation = models.Annotation(
item=item,
layer=layer_id,
user=request.user,
start=float(data['in']), end=float(data['out']),
value=data['value'])
annotation.save()
response = json_response(annotation.json())
else:
response = json_response(status=403, text='permission denied')
return render_to_json_response(response)
actions.register(addAnnotation, cache=False)
@login_required_json
def removeAnnotation(request):
'''
param data {
id: annotationId
}
return {'status': {'code': int, 'text': string},
'data': {
}
}
'''
response = json_response({})
data = json.loads(request.POST['data'])
a = get_object_or_404_json(models.Annotation, public_id=data['id'])
if a.editable(request.user):
a.delete()
else:
response = json_response(status=403, text='permission denied')
return render_to_json_response(response)
actions.register(removeAnnotation, cache=False)
@login_required_json
def editAnnotation(request):
'''
param data {
id:,
in: float,
out: float,
value: string,
}
return {'status': {'code': int, 'text': string},
'data': {
id:
...
}
}
'''
response = json_response({})
data = json.loads(request.POST['data'])
a = get_object_or_404_json(models.Annotation, public_id=data['id'])
if a.editable(request.user):
for key in ('value', 'in', 'out'):
if key in data:
setattr(a, {
'in': 'start',
'out': 'end'
}.get(key,key), data[key])
a.save()
response['data'] = a.json()
else:
response = json_response(status=403, text='permission denied')
return render_to_json_response(response)
actions.register(editAnnotation, cache=False)