Display tag statistics for external users on their profile

app/models/concerns/user.rb

@@ -8,6 +8,7 @@ module User
     has_many :exercises, as: :user
     has_many :file_types, as: :user
     has_many :submissions, as: :user
+    has_many :participations, through: :submissions, source: :exercise, as: :user
     has_many :user_proxy_exercise_exercises, as: :user
     has_many :user_exercise_interventions, as: :user
     has_many :interventions, through: :user_exercise_interventions

app/views/external_users/show.html.slim

@@ -6,3 +6,11 @@ h1 = @user.name
 
 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))