Simulations pane

uvdat/core/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from uvdat.core.models import Chart, City, Dataset, NetworkNode, Region
+from uvdat.core.models import Chart, City, Dataset, NetworkNode, Region, SimulationResult
 
 
 class CityAdmin(admin.ModelAdmin):
@@ -26,8 +26,13 @@ class ChartAdmin(admin.ModelAdmin):
     list_display = ['id', 'name']
 
 
+class SimulationResultAdmin(admin.ModelAdmin):
+    list_display = ['id', 'simulation_id', 'input_args']
+
+
 admin.site.register(City, CityAdmin)
 admin.site.register(Dataset, DatasetAdmin)
 admin.site.register(NetworkNode, NetworkNodeAdmin)
 admin.site.register(Region, RegionAdmin)
 admin.site.register(Chart, ChartAdmin)
+admin.site.register(SimulationResult, SimulationResultAdmin)

uvdat/core/migrations/0008_simulation_results.py

@@ -0,0 +1,43 @@
+# Generated by Django 4.1 on 2023-09-13 15:11
+
+from django.db import migrations, models
+import django_extensions.db.fields
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('core', '0007_charts'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SimulationResult',
+            fields=[
+                (
+                    'id',
+                    models.BigAutoField(
+                        auto_created=True, primary_key=True, serialize=False, verbose_name='ID'
+                    ),
+                ),
+                (
+                    'created',
+                    django_extensions.db.fields.CreationDateTimeField(
+                        auto_now_add=True, verbose_name='created'
+                    ),
+                ),
+                (
+                    'modified',
+                    django_extensions.db.fields.ModificationDateTimeField(
+                        auto_now=True, verbose_name='modified'
+                    ),
+                ),
+                ('simulation_id', models.IntegerField()),
+                ('input_args', models.JSONField(blank=True, null=True)),
+                ('output_data', models.JSONField(blank=True, null=True)),
+            ],
+            options={
+                'get_latest_by': 'modified',
+                'abstract': False,
+            },
+        ),
+    ]

uvdat/core/models.py

@@ -65,3 +65,9 @@ class Chart(models.Model):
     metadata = models.JSONField(blank=True, null=True)
     style = models.JSONField(blank=True, null=True)
     clearable = models.BooleanField(default=False)
+
+
+class SimulationResult(TimeStampedModel, models.Model):
+    simulation_id = models.IntegerField()
+    input_args = models.JSONField(blank=True, null=True)
+    output_data = models.JSONField(blank=True, null=True)

uvdat/core/serializers.py

@@ -1,6 +1,6 @@
 from rest_framework import serializers
 
-from uvdat.core.models import Chart, City, Dataset, NetworkNode
+from uvdat.core.models import Chart, City, Dataset, NetworkNode, SimulationResult
 
 
 class NetworkNodeSerializer(serializers.ModelSerializer):
@@ -42,3 +42,9 @@ def get_center(self, obj):
     class Meta:
         model = City
         fields = '__all__'
+
+
+class SimulationResultSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = SimulationResult
+        fields = '__all__'

uvdat/core/tasks/conversion.py

@@ -1,5 +1,5 @@
-import os
 import json
+import os
 from pathlib import Path
 import tempfile
 import zipfile

uvdat/core/tasks/simulations.py

@@ -0,0 +1,140 @@
+from celery import shared_task
+
+import json
+import large_image
+from django_large_image import tilesource
+from pathlib import Path
+
+import re
+import shapely
+import tempfile
+
+from uvdat.core.models import Dataset, SimulationResult
+from uvdat.core.serializers import DatasetSerializer, SimulationResultSerializer
+
+
+def get_network_node_elevations(network_nodes, elevation_dataset):
+    with tempfile.TemporaryDirectory() as tmp:
+        raster_path = Path(tmp, 'raster')
+        with open(raster_path, 'wb') as raster_file:
+            raster_file.write(elevation_dataset.raster_file.read())
+        source = large_image.open(raster_path)
+        data, data_format = source.getRegion(format='numpy')
+        data = data[:, :, 0]
+        metadata = tilesource.get_metadata(source)
+        source_bounds = metadata.get('bounds')
+
+        elevations = {}
+        for network_node in network_nodes:
+            # same logic as client-side tooltip
+            location = network_node.location
+            x_proportion = (location[0] - source_bounds.get('xmin')) / (
+                source_bounds.get('xmax') - source_bounds.get('xmin')
+            )
+            y_proportion = (location[1] - source_bounds.get('ymin')) / (
+                source_bounds.get('ymax') - source_bounds.get('ymin')
+            )
+            x_index = int(x_proportion * len(data[0]))
+            y_index = int(y_proportion * len(data))
+            elevations[network_node.id] = data[y_index, x_index]
+        return elevations
+
+
+@shared_task
+def flood_scenario_1(simulation_result_id, network_dataset, elevation_dataset, flood_dataset):
+    result = SimulationResult.objects.get(id=simulation_result_id)
+    try:
+        network_dataset = Dataset.objects.get(id=network_dataset)
+        elevation_dataset = Dataset.objects.get(id=elevation_dataset)
+        flood_dataset = Dataset.objects.get(id=flood_dataset)
+    except Dataset.DoesNotExist:
+        return []
+
+    disabled_nodes = []
+    network_nodes = network_dataset.network_nodes.all()
+    flood_geodata = json.loads(flood_dataset.geodata_file.open().read().decode())
+    flood_areas = [
+        shapely.geometry.shape(feature['geometry']) for feature in flood_geodata['features']
+    ]
+    for network_node in network_nodes:
+        node_point = shapely.geometry.Point(*network_node.location)
+        if any(flood_area.contains(node_point) for flood_area in flood_areas):
+            disabled_nodes.append(network_node)
+
+    node_elevations = get_network_node_elevations(network_nodes, elevation_dataset)
+    disabled_nodes.sort(key=lambda n: node_elevations[n.id])
+
+    result.output_data = [n.id for n in disabled_nodes]
+    result.save()
+
+
+AVAILABLE_SIMULATIONS = [
+    {
+        'id': 1,
+        'name': 'Flood Scenario 1',
+        'description': '''
+            Provide a network dataset, elevation dataset, and flood dataset
+            to determine which network nodes go out of service
+            when the target flood occurs.
+        ''',
+        'output_type': 'node_failure_animation',
+        'func': flood_scenario_1,
+        'args': [
+            {
+                'name': 'network_dataset',
+                'type': Dataset,
+                'options_query': {'network': True},
+            },
+            {
+                'name': 'elevation_dataset',
+                'type': Dataset,
+                'options_query': {'category': 'elevation'},
+            },
+            {
+                'name': 'flood_dataset',
+                'type': Dataset,
+                'options_query': {'category': 'flood'},
+            },
+        ],
+    }
+]
+
+
+def get_available_simulations(city_id: int):
+    sims = []
+    for available in AVAILABLE_SIMULATIONS:
+        available = available.copy()
+        available['description'] = re.sub(r'\n\s+', ' ', available['description'])
+        available['args'] = [
+            {
+                'name': a['name'],
+                'options': list(
+                    DatasetSerializer(d).data
+                    for d in a['type']
+                    .objects.filter(
+                        city__id=city_id,
+                        **a['options_query'],
+                    )
+                    .all()
+                ),
+            }
+            for a in available['args']
+        ]
+        del available['func']
+        sims.append(available)
+    return sims
+
+
+def run_simulation(simulation_id: int, **kwargs):
+    simulation_matches = [s for s in AVAILABLE_SIMULATIONS if s['id'] == simulation_id]
+    if len(simulation_matches) > 0:
+        sim_result, created = SimulationResult.objects.get_or_create(
+            simulation_id=simulation_id, input_args=kwargs
+        )
+        sim_result.output_data = None
+        sim_result.save()
+
+        simulation = simulation_matches[0]
+        simulation['func'].delay(sim_result.id, **kwargs)
+        return SimulationResultSerializer(sim_result).data
+    return f"No simulation found with id {simulation_id}."

uvdat/core/views.py

@@ -11,16 +11,18 @@
 from rest_framework.response import Response
 from rest_framework.viewsets import GenericViewSet, ModelViewSet, mixins
 
-from uvdat.core.models import Chart, City, Dataset, Region
+from uvdat.core.models import Chart, City, Dataset, Region, SimulationResult
 from uvdat.core.serializers import (
     ChartSerializer,
     CitySerializer,
     DatasetSerializer,
     NetworkNodeSerializer,
+    SimulationResultSerializer,
 )
 from uvdat.core.tasks.charts import add_gcc_chart_datum
 from uvdat.core.tasks.conversion import convert_raw_data
 from uvdat.core.tasks.networks import network_gcc
+from uvdat.core.tasks.simulations import get_available_simulations, run_simulation
 
 
 class CityViewSet(ModelViewSet):
@@ -29,10 +31,16 @@ class CityViewSet(ModelViewSet):
 
 
 class DatasetViewSet(ModelViewSet, LargeImageFileDetailMixin):
-    queryset = Dataset.objects.all()
     serializer_class = DatasetSerializer
     FILE_FIELD_NAME = 'raster_file'
 
+    def get_queryset(self):
+        city_id = self.request.query_params.get('city')
+        if city_id:
+            return Dataset.objects.filter(city__id=city_id)
+        else:
+            return Dataset.objects.all()
+
     @action(detail=True, methods=['get'])
     def regions(self, request, **kwargs):
         dataset = self.get_object()
@@ -158,8 +166,7 @@ def get_queryset(self, **kwargs):
             return Chart.objects.filter(city__id=city_id)
         return Chart.objects.all()
 
-    # TODO: This should be POST once rest authentication is implemented
-    @action(detail=True, methods=['get'])
+    @action(detail=True, methods=['post'])
     def clear(self, request, **kwargs):
         chart = self.get_object()
         if not chart.clearable:
@@ -169,3 +176,50 @@ def clear(self, request, **kwargs):
         chart.chart_data = {}
         chart.save()
         return HttpResponse(status=200)
+
+
+class SimulationViewSet(GenericViewSet):
+    # Not based on a database model;
+    # Available Simulations must be hard-coded
+    # and associated with a function
+
+    @action(
+        detail=False,
+        methods=['get'],
+        url_path="available",
+    )
+    def list_available(self, request, **kwargs):
+        city_id = request.query_params.get('city')
+        sims = get_available_simulations(city_id)
+        return HttpResponse(
+            json.dumps(sims),
+            status=200,
+        )
+
+    @action(
+        detail=False,
+        methods=['get'],
+        url_path=r'(?P<simulation_id>[\d*]+)/results',
+    )
+    def list_results(self, request, simulation_id: int, **kwargs):
+        return HttpResponse(
+            json.dumps(
+                list(
+                    SimulationResultSerializer(s).data
+                    for s in SimulationResult.objects.filter(simulation_id=int(simulation_id)).all()
+                )
+            ),
+            status=200,
+        )
+
+    @action(
+        detail=False,
+        methods=['post'],
+        url_path=r'run/(?P<simulation_id>[\d*]+)',
+    )
+    def run(self, request, simulation_id: int, **kwargs):
+        result = run_simulation(int(simulation_id), **request.data)
+        return HttpResponse(
+            json.dumps({'result': result}),
+            status=200,
+        )

uvdat/settings.py

@@ -32,6 +32,14 @@ def mutate_configuration(configuration: ComposedConfiguration) -> None:
             's3_file_field',
         ]
 
+        # Disable authentication requirements for REST
+        # TODO: configure authentication and remove this workaround
+        configuration.REST_FRAMEWORK = {
+            'DEFAULT_AUTHENTICATION_CLASSES': [],
+            'DEFAULT_PERMISSION_CLASSES': [],
+            'APPEND_SLASH': False,
+        }
+
         configuration.DATABASES = {
             'default': {
                 'ENGINE': 'django.contrib.gis.db.backends.postgis',

uvdat/urls.py

@@ -18,6 +18,7 @@
 router.register(r'datasets', views.DatasetViewSet, basename='datasets')
 router.register(r'cities', views.CityViewSet, basename='cities')
 router.register(r'charts', views.ChartViewSet, basename='charts')
+router.register(r'simulations', views.SimulationViewSet, basename='simulations')
 
 urlpatterns = [
     path('accounts/', include('allauth.urls')),