import django_filters
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from django_filters.rest_framework import FilterSet
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from guardian.shortcuts import get_objects_for_user
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from rest_framework import serializers, viewsets
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from rest_framework.response import Response
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from rest_framework.views import APIView
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from nodeodm.models import ProcessingNode
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from webodm import settings
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class ProcessingNodeSerializer(serializers.ModelSerializer):
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online = serializers.SerializerMethodField()
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label = serializers.SerializerMethodField()
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def get_online(self, obj):
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return obj.is_online()
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def get_label(self, obj):
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return str(obj)
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class Meta:
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model = ProcessingNode
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fields = '__all__'
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class ProcessingNodeFilter(FilterSet):
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has_available_options = django_filters.CharFilter(method='filter_has_available_options')
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# noinspection PyMethodMayBeStatic
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def filter_has_available_options(self, queryset, name, value):
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if value.lower() in ['true', '1']:
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return queryset.exclude(available_options=dict())
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else:
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return queryset.filter(available_options=dict())
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class Meta:
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model = ProcessingNode
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fields = ['has_available_options', 'id', 'hostname', 'port', 'api_version', 'queue_count', 'max_images', 'label', 'engine', 'engine_version', ]
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class ProcessingNodeViewSet(viewsets.ModelViewSet):
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"""
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Processing node get/add/delete/update
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Processing nodes are associated with zero or more tasks and
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take care of processing input images.
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"""
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filter_class = ProcessingNodeFilter
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pagination_class = None
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serializer_class = ProcessingNodeSerializer
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queryset = ProcessingNode.objects.all()
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def list(self, request, *args, **kwargs):
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queryset = self.filter_queryset(self.get_queryset())
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if settings.UI_MAX_PROCESSING_NODES is not None:
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queryset = queryset[:settings.UI_MAX_PROCESSING_NODES]
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if settings.NODE_OPTIMISTIC_MODE:
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for pn in queryset:
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pn.update_node_info()
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serializer = self.get_serializer(queryset, many=True)
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return Response(serializer.data)
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class ProcessingNodeOptionsView(APIView):
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"""
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Display the common options available among all online processing nodes. This is calculated by intersecting the available_options field of all online processing nodes visible to the current user.
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"""
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queryset = ProcessingNode.objects.all()
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def get(self, request):
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nodes = get_objects_for_user(request.user, 'view_processingnode', ProcessingNode, accept_global_perms=False)
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common_options = []
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for node in nodes:
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# Skip offline nodes
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if not node.is_online():
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continue
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# First? Just populate
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if len(common_options) == 0 and len(node.available_options) > 0:
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common_options = node.available_options
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else:
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# Remove all options that are in common_options,
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# but that are not in node.available_options
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for common_option in common_options:
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found = False
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for option in node.available_options:
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if common_option['name'] == option['name']:
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found = True
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break
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# Mark for deletion
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if not found:
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common_option['_delete'] = True
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common_options = [co for co in common_options if not '_delete' in co]
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return Response(common_options)
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