Add statistics page

Add a page with basic statistics for the index - number of layers,
recipes, classes, machines and distros on an overall basis (distinct
names) and per branch, since I've been asked a few times for this kind
of information. It's currently only linked from the Tools menu for
logged-in users, but the URL will work for anyone.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

layerindex/urls.py

@@ -8,7 +8,7 @@ from django.conf.urls import *
 from django.views.generic import TemplateView, DetailView, ListView, RedirectView
 from django.views.defaults import page_not_found
 from django.core.urlresolvers import reverse_lazy
-from layerindex.views import LayerListView, LayerReviewListView, LayerReviewDetailView, RecipeSearchView, MachineSearchView, PlainTextListView, LayerDetailView, edit_layer_view, delete_layer_view, edit_layernote_view, delete_layernote_view, HistoryListView, EditProfileFormView, AdvancedRecipeSearchView, BulkChangeView, BulkChangeSearchView, bulk_change_edit_view, bulk_change_patch_view, BulkChangeDeleteView, RecipeDetailView, RedirectParamsView, ClassicRecipeSearchView, ClassicRecipeDetailView, ClassicRecipeStatsView, LayerUpdateDetailView, UpdateListView, UpdateDetailView
+from layerindex.views import LayerListView, LayerReviewListView, LayerReviewDetailView, RecipeSearchView, MachineSearchView, PlainTextListView, LayerDetailView, edit_layer_view, delete_layer_view, edit_layernote_view, delete_layernote_view, HistoryListView, EditProfileFormView, AdvancedRecipeSearchView, BulkChangeView, BulkChangeSearchView, bulk_change_edit_view, bulk_change_patch_view, BulkChangeDeleteView, RecipeDetailView, RedirectParamsView, ClassicRecipeSearchView, ClassicRecipeDetailView, ClassicRecipeStatsView, LayerUpdateDetailView, UpdateListView, UpdateDetailView, StatsView
 from layerindex.models import LayerItem, Recipe, RecipeChangeset
 from rest_framework import routers
 from . import restviews
@@ -127,6 +127,10 @@ urlpatterns = patterns('',
         TemplateView.as_view(
             template_name='layerindex/about.html'),
             name="about"),
+    url(r'^stats/$',
+        StatsView.as_view(
+            template_name='layerindex/stats.html'),
+            name='stats'),
     url(r'^oe-classic/$',
         RedirectView.as_view(url=reverse_lazy('classic_recipe_search'), permanent=False),
             name='classic'),

layerindex/views.py

@@ -1007,3 +1007,20 @@ class ClassicRecipeStatsView(TemplateView):
             'jquery_on_ready': False,
         }
         return context
+
+
+class StatsView(TemplateView):
+    def get_context_data(self, **kwargs):
+        context = super(StatsView, self).get_context_data(**kwargs)
+        context['layercount'] = LayerItem.objects.count()
+        context['recipe_count_distinct'] = Recipe.objects.values('pn').distinct().count()
+        context['class_count_distinct'] = BBClass.objects.values('name').distinct().count()
+        context['machine_count_distinct'] = Machine.objects.values('name').distinct().count()
+        context['distro_count_distinct'] = Distro.objects.values('name').distinct().count()
+        context['perbranch'] = Branch.objects.order_by('sort_priority').annotate(
+                layer_count=Count('layerbranch', distinct=True),
+                recipe_count=Count('layerbranch__recipe', distinct=True),
+                class_count=Count('layerbranch__bbclass', distinct=True),
+                machine_count=Count('layerbranch__machine', distinct=True),
+                distro_count=Count('layerbranch__distro', distinct=True))
+        return context

templates/base.html

@@ -73,6 +73,7 @@
                             <li><a href="{% url 'bulk_change' %}">Bulk Change</a></li>
                             <li><a href="{% url 'duplicates' 'master' %}">Duplicates</a></li>
                             <li><a href="{% url 'update_list' %}">Updates</a></li>
+                            <li><a href="{% url 'stats' %}">Statistics</a></li>
                         </ul>
                     </li>
                     {% endif %}

templates/layerindex/stats.html

@@ -0,0 +1,60 @@
+{% extends "base.html" %}
+{% load i18n %}
+{% load static %}
+
+{% comment %}
+
+  layerindex-web - statistics page template
+
+  Copyright (C) 2018 Intel Corporation
+  Licensed under the MIT license, see COPYING.MIT for details
+
+{% endcomment %}
+
+
+<!--
+{% block title_append %} - statistics{% endblock %}
+-->
+
+{% block content %}
+{% autoescape on %}
+
+<h2>Statistics</h2>
+
+<h3>Overall</h3>
+<dl class="dl-horizontal">
+    <dt>Layers</dt><dd>{{ layercount }}</dd>
+    <dt>Recipes</dt><dd>{{ recipe_count_distinct }} (distinct names)</dd>
+    <dt>Machines</dt><dd>{{ machine_count_distinct }} (distinct names)</dd>
+    <dt>Classes</dt><dd>{{ class_count_distinct }} (distinct names)</dd>
+    <dt>Distros</dt><dd>{{ distro_count_distinct }} (distinct names)</dd>
+</dl>
+
+<h3>Per branch</h3>
+
+<table class="table">
+    <thead>
+        <th>Branch</th>
+        <th style="text-align: right">Layers</th>
+        <th style="text-align: right">Recipes</th>
+        <th style="text-align: right">Machines</th>
+        <th style="text-align: right">Classes</th>
+        <th style="text-align: right">Distros</th>
+    </thead>
+    <tbody>
+        {% for branch in perbranch %}
+        <tr {% if not branch.updates_enabled %}class="muted"{% endif %}>
+            <td>{{ branch.name }}</td>
+            <td style="text-align: right">{{ branch.layer_count }}</td>
+            <td style="text-align: right">{{ branch.recipe_count }}</td>
+            <td style="text-align: right">{{ branch.machine_count }}</td>
+            <td style="text-align: right">{{ branch.class_count }}</td>
+            <td style="text-align: right">{{ branch.distro_count }}</td>
+        </tr>
+        {% endfor %}
+    </tbody>
+</table>
+
+{% endautoescape %}
+{% endblock %}
+