Add views and routes for inisghts

Signed-off-by: Sampurna Pyne <sampurnapyne1710@gmail.com>

Author: Samk1710

insights/urls.py

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+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# VulnerableCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/aboutcode-org/vulnerablecode for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+from django.urls import path
+
+from insights import views
+
+urlpatterns = [
+    path("", views.insights_dashboard, name="insights-dashboard"),
+    path("<str:panel_id>/", views.insights_dashboard, name="insights-panel"),
+]

insights/views.py

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+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# VulnerableCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/aboutcode-org/vulnerablecode for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+from django.db.models import Count
+from django.shortcuts import redirect
+from django.shortcuts import render
+
+from insights.graphs import GRAPHS
+from insights.graphs import PANEL_LABELS
+from insights.graphs import PANEL_LAYOUTS
+from insights.graphs import PANELS
+from insights.graphs.package_panel import build_cwe_chart_columns
+from insights.graphs.package_panel import compute_top_cwes
+from insights.graphs.severity_panel import aggregate_severity_buckets
+from insights.graphs.severity_panel import format_severity_chart_data
+from insights.models import DailySnapshot
+from vulnerabilities.models import AdvisoryV2
+from vulnerabilities.models import PackageV2
+
+
+def _severity_search(search_query):
+    """Executes a severity search for a given PUrl"""
+    packages = PackageV2.objects.search(search_query)
+    error = None
+
+    if packages.exists():
+        severities = (
+            AdvisoryV2.objects.filter(
+                impacted_packages__affecting_packages__in=packages,
+                severities__isnull=False,
+                severities__scoring_system__icontains="cvss",
+            )
+            .values("severities__value")
+            .annotate(sev_count=Count("id", distinct=True))
+        )
+        buckets = aggregate_severity_buckets(severities, "sev_count")
+    else:
+        buckets = [0] * 10
+        error = "No data available for this query."
+
+    return format_severity_chart_data(buckets), error
+
+
+def _cwe_search(search_query):
+    """Executes a CWE search for a given PUrl"""
+    packages = PackageV2.objects.search(search_query)
+    error = None
+
+    if packages.exists():
+        cwe_counts = compute_top_cwes(packages)
+        chart_data = build_cwe_chart_columns(cwe_counts)
+    else:
+        chart_data = {}
+        error = "No packages found for this query."
+
+    return {"pkg-cwe-bar": chart_data}, error
+
+
+def insights_dashboard(request, panel_id=None):
+    """Dashboard view to display insights."""
+
+    if not panel_id or panel_id not in PANELS:
+        return redirect("insights-panel", panel_id=PANELS[0])
+
+    panels = []
+    for panel_key in PANELS:
+        panel_graphs = [graph for graph in GRAPHS.values() if graph.panel == panel_key]
+        panels.append(
+            {
+                "id": panel_key,
+                "label": PANEL_LABELS[panel_key],
+                "layout": PANEL_LAYOUTS.get(panel_key, "standard"),
+                "graphs": panel_graphs,
+            }
+        )
+
+    try:
+        snapshot = DailySnapshot.objects.latest()
+        last_time = snapshot.created_at
+
+        snapshot_data = {}
+        for graph_id, graph_def in GRAPHS.items():
+            if graph_def.data_fn:
+                snapshot_data[graph_id] = graph_def.data_fn(snapshot)
+    except DailySnapshot.DoesNotExist:
+        last_time = None
+        snapshot_data = {}
+
+    search_query = request.GET.get("q", "").strip()
+    search_results_dict = None
+    search_error = None
+
+    if search_query:
+        if panel_id == "severity_panel":
+            search_results_dict, search_error = _severity_search(search_query)
+        elif panel_id == "package_panel":
+            search_results_dict, search_error = _cwe_search(search_query)
+
+    context = {
+        "panels": panels,
+        "current_panel_id": panel_id,
+        "last_snapshot_time": last_time,
+        "snapshot_dict": {"snapshot_data": snapshot_data},
+        "search_query": search_query,
+        "search_results_dict": search_results_dict,
+        "search_error": search_error,
+    }
+    return render(request, "insights/dashboard.html", context)