FEATURE: accepted solutions admin report

config/locales/server.en.yml

@@ -1,3 +1,8 @@
 en:
   site_settings:
     allow_solved_on_all_topics: "Allow users to select solutions on all topics (by default you control this by editing categories)"
+  reports:
+    accepted_solutions:
+      title: "Accepted solutions"
+      xaxis: "Day"
+      yaxis: "Total"

plugin.rb

@@ -90,6 +90,28 @@ after_initialize do
     ["is_accepted_answer"]
   end
 
+  if Report.respond_to?(:add_report)
+    AdminDashboardData::GLOBAL_REPORTS << "accepted_solutions"
+
+    Report.add_report("accepted_solutions") do |report|
+      report.data = []
+      accepted_solutions = TopicCustomField.where(name: "accepted_answer_post_id")
+      accepted_solutions = accepted_solutions.joins(:topic).where("topics.category_id = ?", report.category_id) if report.category_id
+      accepted_solutions.where("topic_custom_fields.created_at >= ?", report.start_date)
+                        .where("topic_custom_fields.created_at <= ?", report.end_date)
+                        .group("DATE(topic_custom_fields.created_at)")
+                        .order("DATE(topic_custom_fields.created_at)")
+                        .count
+                        .each do |date, count|
+        report.data << { x: date, y: count }
+      end
+      report.total = accepted_solutions.count
+      report.prev30Days = accepted_solutions.where("topic_custom_fields.created_at >= ?", report.start_date - 30.days)
+                                            .where("topic_custom_fields.created_at <= ?", report.start_date)
+                                            .count
+    end
+  end
+
   require_dependency 'topic_view_serializer'
   class ::TopicViewSerializer
     attributes :accepted_answer