Add chart data json views

src/memopol/tests/response_fixtures/ChartViewsTest.test_chamber_score.content

+{"chamber": "European Parliament", "scores": [-1312.0, -1216.0, -1216.0, -1216.0, -1216.0, -1216.0, -1216.0, -1208.0, -1200.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1208.0, 1224.0, 1468.0, 1468.0, 1480.0]}
\ No newline at end of file

src/memopol/tests/response_fixtures/ChartViewsTest.test_chamber_score.metadata

+{
+    "status_code": 200
+}
\ No newline at end of file

src/memopol/tests/response_fixtures/ChartViewsTest.test_theme_score.content

+{"theme": "Etat d'urgence", "scores": [-305.0, -305.0, -265.0, -235.0, -220.0, -215.0, -205.0, -205.0, -195.0, -195.0, -190.0, -185.0, -135.0, -115.0, -110.0, -105.0, -100.0, -100.0, -100.0, -90.0, -90.0, -90.0, -90.0, -55.0, -25.0, -5.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 35.0]}
\ No newline at end of file

src/memopol/tests/response_fixtures/ChartViewsTest.test_theme_score.metadata

+{
+    "status_code": 200
+}
\ No newline at end of file

src/memopol/tests/test_chart_data.py

+from .base import BaseTest
+
+
+class ChartViewsTest(BaseTest):
+    def test_theme_score(self):
+        url = '/charts/data/theme-scores/1/'
+        self.request_test(url)
+
+    def test_chamber_score(self):
+        url = '/charts/data/chamber-scores/1/'
+        self.request_test(url)
+
+    def test_theme_score_queries(self):
+        url = '/charts/data/theme-scores/1/'
+
+        # First query to set session variables
+        self.client.get(url)
+
+        with self.assertNumQueries(2):
+            # 1 query for the theme
+            # 1 query for theme scores
+            self.client.get(url)
+
+    def test_chamber_score_queries(self):
+        url = '/charts/data/chamber-scores/1/'
+
+        # First query to set session variables
+        self.client.get(url)
+
+        with self.assertNumQueries(2):
+            # 1 query for the chamber
+            # 1 query for chamber scores
+            self.client.get(url)

src/memopol/urls.py

@@ -9,6 +9,9 @@ from views.autocomplete import (
     ProposalAutocomplete,
     RepresentativeAutocomplete,
 )
+
+from views.charts import ThemeScoresJSONView, ChamberScoresJSONView
+
 from views.dossier_detail_base import DossierDetailBase
 from views.dossier_detail_recommendations import DossierDetailRecommendations
 from views.dossier_detail_proposals import DossierDetailProposals
@@ -184,6 +187,20 @@ urlpatterns = [
         name='redirect-group-representative-list'
     ),
 
+    # Chart data URLs
+
+    url(
+        r'^charts/data/theme-scores/(?P<theme>\d+)/$',
+        ThemeScoresJSONView.as_view(),
+        name='charts-data-theme-scores'
+    ),
+
+    url(
+        r'^charts/data/chamber-scores/(?P<chamber>\d+)/$',
+        ChamberScoresJSONView.as_view(),
+        name='charts-data-chamber-scores'
+    ),
+
     # Testing URLs
 
     url(

src/memopol/views/charts.py

+import datetime
+import json
+
+from django.db.models import Q
+from django.http import HttpResponse
+from django.views import generic
+
+from representatives.models import Chamber, Representative
+from memopol_themes.models import Theme
+from memopol_scores.models import ThemeScore
+
+
+class ThemeScoresJSONView(generic.View):
+    """
+    Returns JSON with all score points for a given theme as follows:
+
+    {
+        "theme": "<theme_name>",
+        "scores": [-99, -98, -98, ... 100, 102, 102, 102]
+    }
+    """
+
+    def get(self, request, *args, **kwargs):
+        try:
+            theme = Theme.objects.get(id=kwargs['theme'])
+        except Theme.DoesNotExist:
+            return HttpResponseNotFound()
+
+        data = {
+            "theme": theme.name,
+            "scores": [ts['score'] for ts in
+                       ThemeScore.objects.filter(theme=theme).order_by('score').values('score')]
+        }
+
+        return HttpResponse(json.dumps(data), content_type='application/json')
+
+
+class ChamberScoresJSONView(generic.View):
+    """
+    Returns JSON with all score points for a given chamber as follows:
+
+    {
+        "chamber": "<chamber_name>",
+        "scores": [-99, -98, -98, ... 100, 102, 102, 102]
+    }
+    """
+
+    def get(self, request, *args, **kwargs):
+        try:
+            chamber = Chamber.objects.get(id=kwargs['chamber'])
+        except Chamber.DoesNotExist:
+            return HttpResponseNotFound()
+
+        today = datetime.date.today()
+        meps = Representative.objects.filter(
+            Q(mandates__end_date__gte=today) |
+            Q(mandates__end_date__isnull=True),
+            mandates__group__chamber=chamber
+        ).select_related('representative_score') \
+         .order_by('representative_score__score') \
+         .distinct()
+
+        data = {
+            "chamber": chamber.name,
+            "scores": [r.representative_score.score for r in meps]
+        }
+
+        return HttpResponse(json.dumps(data), content_type='application/json')