set proglang based on exenv

try to guess exenv based on proglang

app/services/proforma_service/convert_exercise_to_task.rb

@@ -23,7 +23,7 @@ module ProformaService
           title: @exercise.title,
           description: @exercise.description,
           internal_description: nil,
-          # proglang: proglang, where can we get this information?
+          proglang: proglang,
           files: task_files,
           tests: tests,
           uuid: uuid,
@@ -44,6 +44,12 @@ module ProformaService
       )
     end
 
+    def proglang
+      regex = %r{^openhpi/co_execenv_(?<language>[^:]*):(?<version>[^-]*)(?>-.*)?$}
+      match = regex.match @exercise.execution_environment.docker_image
+      match ? {name: match[:language], version: match[:version]} : nil
+    end
+
     def uuid
       @exercise.update(uuid: SecureRandom.uuid) if @exercise.uuid.nil?
       @exercise.uuid

app/services/proforma_service/convert_task_to_exercise.rb

@@ -26,12 +26,26 @@ module ProformaService
         allow_file_creation: string_to_bool(@task.meta_data[:CodeOcean]&.dig(:allow_file_creation)),
         allow_auto_completion: string_to_bool(@task.meta_data[:CodeOcean]&.dig(:allow_auto_completion)),
         expected_difficulty: @task.meta_data[:CodeOcean]&.dig(:expected_difficulty),
-        execution_environment_id: @task.meta_data[:CodeOcean]&.dig(:execution_environment_id),
+        execution_environment_id: execution_environment_id,
 
         files: files
       )
     end
 
+    def execution_environment_id
+      from_meta_data = @task.meta_data[:CodeOcean]&.dig(:execution_environment_id)
+      return from_meta_data if from_meta_data
+      return nil unless @task.proglang
+
+      ex_envs_with_name_and_version = ExecutionEnvironment.where('docker_image ilike ?', "%#{@task.proglang[:name]}%#{@task.proglang[:version]}%")
+      return ex_envs_with_name_and_version.first.id if ex_envs_with_name_and_version.any?
+
+      ex_envs_with_name = ExecutionEnvironment.where('docker_image like ?', "%#{@task.proglang[:name]}%")
+      return ex_envs_with_name.first.id if ex_envs_with_name.any?
+
+      nil
+    end
+
     def string_to_bool(str)
       return true if str == 'true'
       return false if str == 'false'