Fix completion conversion in case of errors

app/controllers/completions_controller.rb

@@ -36,9 +36,17 @@ class CompletionsController < ApplicationController
     @completion.contest_id = @contest.id
     if @completion.save
       extend_completions!(@completion.contestant)
-      redirect_to contest_path(@contest)
+      if @contestant && !params[:completion].key?(:message_id)
+        redirect_to edit_contest_contestant_path(@contest, @contestant)
+      else
+        redirect_to @contest
+      end
     else
-      if @contestant
+      if params[:completion].key?(:message_id)
+        @message = Message.find(params[:completion][:message_id])
+        @action_name = t("helpers.buttons.back")
+        @action_path = contest_path(@contest)
+      elsif @contestant
         @action_name = t("helpers.buttons.back_to_contestant")
         @action_path = edit_contest_contestant_path(@contest, @contestant)
       end

app/models/completion.rb

@@ -44,6 +44,8 @@ class Completion < ApplicationRecord
       self.time_seconds = arr[0].to_i * 3600 + arr[1].to_i * 60 + arr[2].to_i
     elsif arr.size == 2
       self.time_seconds = arr[0].to_i * 60 + arr[1].to_i
+    elsif arr.size == 1
+      self.time_seconds = arr[0].to_i
     end
   end
 end