search bar now searches in forum of the course from where the LTI request came from. alternatively searches in the java 2017 course.

show interventions only in the current java course

app/controllers/concerns/lti.rb

@@ -140,6 +140,7 @@ module Lti
 
     lti_parameters.lti_parameters = options[:parameters].slice(*SESSION_PARAMETERS).to_json
     lti_parameters.save!
+    @lti_parameters = lti_parameters
 
     session[:consumer_id] = options[:consumer].id
     session[:external_user_id] = @current_user.id

app/controllers/exercises_controller.rb

@@ -9,6 +9,7 @@ class ExercisesController < ApplicationController
   before_action :set_exercise, only: MEMBER_ACTIONS + [:clone, :implement, :working_times, :intervention, :run, :statistics, :submit, :reload]
   before_action :set_external_user, only: [:statistics]
   before_action :set_file_types, only: [:create, :edit, :new, :update]
+  before_action :set_course_token, only: [:implement]
 
   skip_before_filter :verify_authenticity_token, only: [:import_proforma_xml]
   skip_after_action :verify_authorized, only: [:import_proforma_xml]
@@ -155,12 +156,16 @@ class ExercisesController < ApplicationController
 
   def implement
     redirect_to(@exercise, alert: t('exercises.implement.no_files')) unless @exercise.files.visible.exists?
+    user_got_enough_interventions = UserExerciseIntervention.where(exercise: @exercise, user: current_user).count >= 3
+    is_java_course = @course_token && @course_token.eql?(java_course_token)
+
     @show_interventions =
-      if UserExerciseIntervention.where(exercise: @exercise, user: current_user).count >= 3
+      if !is_java_course || user_got_enough_interventions
         "false"
       else
         "true"
       end
+
     @search = Search.new
     @search.exercise = @exercise
     @submission = current_user.submissions.where(exercise_id: @exercise.id).order('created_at DESC').first
@@ -174,6 +179,22 @@ class ExercisesController < ApplicationController
     end
   end
 
+  def set_course_token
+    if @lti_parameters
+      lti_json = @lti_parameters.lti_parameters
+      @course_token =
+          if match = lti_json.match(/^.*courses\/([a-z0-9\-]+)\/sections/)
+            match.captures.first
+          else
+            java_course_token
+          end
+    else
+      # no consumer, therefore implementation with internal user
+      @course_token = java_course_token
+    end
+  end
+  private :set_course_token
+
   def working_times
     working_time_accumulated = @exercise.accumulated_working_time_for_only(current_user)
     working_time_75_percentile = @exercise.get_quantiles([0.75]).first
@@ -358,4 +379,8 @@ class ExercisesController < ApplicationController
     redirect_to_lti_return_path
   end
 
+  def java_course_token
+    "702cbd2a-c84c-4b37-923a-692d7d1532d0"
+  end
+
 end