Turn contest dashboard into tabs for easier navigation

app/policies/contest_policy.rb

@@ -1,30 +1,38 @@
 class ContestPolicy < ApplicationPolicy
+  def owner_or_admin
+    if record == :contest
+      true
+    else
+      record.user.id == user.id || user.admin?
+    end
+  end
+
   def index?
-    true
+    owner_or_admin
   end
 
   def show?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def new?
-    true
+    owner_or_admin
   end
 
   def create?
-    true
+    owner_or_admin
   end
 
   def convert?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def convert_csv?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def edit?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def settings_general_edit?
@@ -48,23 +56,27 @@ class ContestPolicy < ApplicationPolicy
   end
 
   def finalize_import?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def update?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def destroy?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def import?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
   end
 
   def export?
-    record.user.id == user.id || user.admin?
+    owner_or_admin
+  end
+
+  def upload_csv?
+    owner_or_admin
   end
 
   def offline?
@@ -94,8 +106,4 @@ class ContestPolicy < ApplicationPolicy
   def scoreboard?
     record.public
   end
-
-  def upload_csv?
-    record.user.id == user.id || user.admin?
-  end
 end