From 72d890d2d2bf4d3f83486d273d00634ec0fbb6ee Mon Sep 17 00:00:00 2001
From: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date: Tue, 17 Apr 2012 18:51:58 +0100
Subject: [PATCH] MDL-32490 Offline assignment: do not display lateness
 information

---
 mod/assignment/lib.php                           | 10 ++++++++--
 mod/assignment/mod_form.php                      |  6 ++++--
 mod/assignment/type/offline/assignment.class.php |  4 ++++
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/mod/assignment/lib.php b/mod/assignment/lib.php
index 08144b601c4..c6fa42250d3 100644
--- a/mod/assignment/lib.php
+++ b/mod/assignment/lib.php
@@ -408,6 +408,12 @@ class assignment_base {
         return $submitted;
     }
 
+    /**
+     * @return Whether this assignment type supports lateness information - true by default
+     */
+    function supports_lateness() {
+        return true;
+    }
 
     /**
      * @todo Document this function
@@ -1374,8 +1380,8 @@ class assignment_base {
                             if ($auser->timemodified > 0) {
                                 $studentmodifiedcontent = $this->print_student_answer($auser->id)
                                         . userdate($auser->timemodified);
-                                if ($assignment->timedue && $auser->timemodified > $assignment->timedue) {
-                                    $studentmodifiedcontent .= assignment_display_lateness($auser->timemodified, $assignment->timedue);
+                                if ($assignment->timedue && $auser->timemodified > $assignment->timedue && $this->supports_lateness()) {
+                                    $studentmodifiedcontent .= $this->display_lateness($auser->timemodified);
                                     $rowclass = 'late';
                                 }
                             } else {
diff --git a/mod/assignment/mod_form.php b/mod/assignment/mod_form.php
index 1c5cf3195aa..f31ceb8dfa7 100644
--- a/mod/assignment/mod_form.php
+++ b/mod/assignment/mod_form.php
@@ -55,8 +55,10 @@ class mod_assignment_mod_form extends moodleform_mod {
 
         $ynoptions = array( 0 => get_string('no'), 1 => get_string('yes'));
 
-        $mform->addElement('select', 'preventlate', get_string('preventlate', 'assignment'), $ynoptions);
-        $mform->setDefault('preventlate', 0);
+        if ($assignmentinstance->supports_lateness()) {            
+            $mform->addElement('select', 'preventlate', get_string('preventlate', 'assignment'), $ynoptions);
+            $mform->setDefault('preventlate', 0);
+        }
 
         // hack to support pluggable assignment type titles
         if (get_string_manager()->string_exists('type'.$type, 'assignment')) {
diff --git a/mod/assignment/type/offline/assignment.class.php b/mod/assignment/type/offline/assignment.class.php
index 04097dc8b7f..b975d5955a9 100644
--- a/mod/assignment/type/offline/assignment.class.php
+++ b/mod/assignment/type/offline/assignment.class.php
@@ -11,6 +11,10 @@ class assignment_offline extends assignment_base {
         $this->type = 'offline';
     }
 
+    function supports_lateness() {
+        return false;
+    }
+
     function display_lateness($timesubmitted) {
         return '';
     }