feat: add TreeView and its endpoint

backend/kernelCI/urls.py

@@ -16,8 +16,9 @@
 """
 
 from django.contrib import admin
-from django.urls import path
+from django.urls import path, include
 
 urlpatterns = [
     path("admin/", admin.site.urls),
+    path('api/', include('kernelCI_app.urls')),
 ]

backend/kernelCI_app/urls.py

@@ -0,0 +1,7 @@
+from django.urls import path
+from kernelCI_app import views
+
+
+urlpatterns = [
+    path('tree/', views.TreeView.as_view(), name='tree')
+]

backend/kernelCI_app/views.py

@@ -1,3 +1,51 @@
-# from django.shortcuts import render
+from django.http import JsonResponse
+from django.views import View
 
-# Create your views here.
+from kernelCI_app.models import Checkouts
+from kernelCI_app.serializers import TreeSerializer
+from kernelCI_app.utils import get_visible_record_ids
+
+
+class TreeView(View):
+
+    def get(self, _):
+        checkout_ids = get_visible_record_ids('checkouts')
+        placeholders = ','.join(['%s'] * len(checkout_ids))
+
+        checkouts = Checkouts.objects.raw(f"""
+            SELECT
+                checkouts.*,
+                COUNT(CASE WHEN builds.valid = true THEN 1 END) AS valid_builds,
+                COUNT(CASE WHEN builds.valid = false THEN 1 END) AS invalid_builds,
+                SUM(CASE WHEN builds.valid IS NULL AND builds.id IS NOT NULL THEN 1 ELSE 0 END)
+                    AS null_builds,
+                COUNT(builds.id) AS total_builds,
+                COUNT(CASE WHEN tests.status = 'FAIL' THEN 1 END) AS fail_tests,
+                COUNT(CASE WHEN tests.status = 'ERROR' THEN 1 END) AS error_tests,
+                COUNT(CASE WHEN tests.status = 'MISS' THEN 1 END) AS miss_tests,
+                COUNT(CASE WHEN tests.status = 'PASS' THEN 1 END) AS pass_tests,
+                COUNT(CASE WHEN tests.status = 'DONE' THEN 1 END) AS done_tests,
+                COUNT(CASE WHEN tests.status = 'SKIP' THEN 1 END) AS skip_tests,
+                SUM(CASE WHEN tests.status IS NULL AND tests.id IS NOT NULL THEN 1 ELSE 0 END)
+                    AS null_tests,
+                COUNT(tests.id) AS total_tests
+            FROM
+                checkouts
+            LEFT JOIN
+                builds ON builds.checkout_id = checkouts.id
+            LEFT JOIN
+                tests ON tests.build_id = builds.id
+            WHERE
+                checkouts.id IN ({placeholders})
+            GROUP BY
+                checkouts.id;
+            """,
+            checkout_ids
+        )
+
+        for c in checkouts:
+            print('checkout:', c.id, c.valid_builds, c.pass_tests)
+
+        serializer = TreeSerializer(checkouts, many=True)
+        resp = JsonResponse(serializer.data, safe=False)
+        return resp