Move tag statistics to its own route for asynchronous loading

app/controllers/external_users_controller.rb

@@ -63,4 +63,20 @@ class ExternalUsersController < ApplicationController
     }
   end
 
+  def tag_statistics
+    @user = ExternalUser.find(params[:id])
+    authorize!
+
+    statistics = []
+    tags = ProxyExercise.new().get_user_knowledge_and_max_knowledge(@user, @user.participations.uniq.compact)
+    tags[:user_topic_knowledge].each_pair do |key, value|
+      statistics.append({:key => key.name.to_s, :value => (100.0 / tags[:max_topic_knowledge][key] * value).round(2)})
+    end
+    statistics.sort_by! {|item| item[:value]}
+
+    respond_to do |format|
+      format.json { render(json: statistics) }
+    end
+  end
+
 end

app/policies/external_user_policy.rb

@@ -2,4 +2,8 @@ class ExternalUserPolicy < AdminOnlyPolicy
   def statistics?
     admin?
   end
+
+  def tag_statistics?
+    admin?
+  end
 end

app/views/external_users/show.html.slim

@@ -8,9 +8,3 @@ br
 = link_to(t('shared.statistics'), statistics_external_user_path(@user))
 
 .tag-grid
-  - tag_stats = ProxyExercise.new().get_user_knowledge_and_max_knowledge(@user, @user.participations.uniq.compact)
-  - tag_stats[:user_topic_knowledge].each do |key, value|
-    //p = key.name.to_s + ' -> ' + value.to_s + " (of #{tag_stats[:max_topic_knowledge][key].to_s })"
-    .tag-details
-      = key.name.to_s
-      = progress_bar((100.0 / tag_stats[:max_topic_knowledge][key] * value).round(2))

config/routes.rb

@@ -128,6 +128,9 @@ Rails.application.routes.draw do
 
   resources :external_users, only: [:index, :show], concerns: :statistics do
     resources :exercises, concerns: :statistics
+    member do
+      get :tag_statistics
+    end
   end
 
   namespace :code_ocean do