Offer aggregated RfC counts via API

app/controllers/statistics_controller.rb

@@ -29,11 +29,20 @@ class StatisticsController < ApplicationController
 
   def rfc_activity
     respond_to do |format|
-      format.json { render(json: rfc_activity_live_data) }
+      format.json { render(json: rfc_activity_data) }
     end
   end
 
   def rfc_activity_history
+    respond_to do |format|
+      format.html { render 'rfc_activity_history' }
+      format.json do
+        range = params[:range] || 'year'
+        from = DateTime.strptime(params[:from], '%Y') rescue DateTime.new(0)
+        to = DateTime.strptime(params[:to], '%Y') rescue DateTime.now
+        render(json: ranged_rfc_data(range, from, to))
+      end
+    end
   end
 
   def authorize!

app/helpers/statistics_helper.rb

@@ -152,4 +152,39 @@ module StatisticsHelper
     ]
   end
 
+  def ranged_rfc_data(range='year', from=DateTime.new(0), to=DateTime.now)
+    [
+        {
+            key: 'rfcs',
+            name: t('activerecord.models.request_for_comment.other'),
+            data: RequestForComment.in_range(from, to)
+                      .select("date_trunc('#{range}', created_at) AS \"range\", count(id)")
+                      .group('range').order('range')
+        },
+        {
+            key: 'rfcs_solved',
+            name: t('statistics.entries.request_for_comments.percent_solved'),
+            data: RequestForComment.in_range(from, to)
+                      .where(solved: true)
+                      .select("date_trunc('#{range}', created_at) AS \"range\", count(id)")
+                      .group('range').order('range')
+        },
+        {
+            key: 'rfcs_soft_solved',
+            name: t('statistics.entries.request_for_comments.percent_soft_solved'),
+            data: RequestForComment.in_range(from, to).unsolved
+                      .where(full_score_reached: true)
+                      .select("date_trunc('#{range}', created_at) AS \"range\", count(id)")
+                      .group('range').order('range')
+        },
+        {
+            key: 'rfcs_unsolved',
+            name: t('statistics.entries.request_for_comments.percent_unsolved'),
+            data: RequestForComment.in_range(from, to).unsolved
+                      .select("date_trunc('#{range}', created_at) AS \"range\", count(id)")
+                      .group('range').order('range')
+        }
+    ]
+  end
+
 end