From b2ec10959a0f039990b71d3382c379a8f0c58a9e Mon Sep 17 00:00:00 2001
From: skodak <skodak>
Date: Tue, 11 Jul 2006 13:02:42 +0000
Subject: [PATCH] workaround for Bug #6035 - editing quiz in one tab changes
 quiz in other; merged from MOODLE_16_STABLE

---
 mod/quiz/edit.php    |  4 ++++
 mod/quiz/editlib.php | 13 +++++++------
 question/editlib.php |  2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/mod/quiz/edit.php b/mod/quiz/edit.php
index 564da591bc..a930a19565 100644
--- a/mod/quiz/edit.php
+++ b/mod/quiz/edit.php
@@ -236,6 +236,10 @@ if (self.name == 'editquestion') {
     }
 
     if (isset($_REQUEST['savechanges']) and confirm_sesskey()) {
+        $savequizid = required_param('savequizid', PARAM_INT);
+        if ($modform->id != $savequizid) {
+            error("Error saving quiz settings, please do not change two quizes from the same browser", $CFG->wwwroot.'/mod/quiz/edit.php?quizid='.$savequizid);
+        }
     /// We need to save the new ordering (if given) and the new grades
         $oldquestions = explode(",", $modform->questions); // the questions in the old order
         $questions = array(); // for questions in the new order
diff --git a/mod/quiz/editlib.php b/mod/quiz/editlib.php
index ea932577a4..ab7b9b0d27 100644
--- a/mod/quiz/editlib.php
+++ b/mod/quiz/editlib.php
@@ -211,15 +211,15 @@ function quiz_print_question_list($quiz, $allowdelete=true, $showbreaks=true, $r
                 echo '<td width="50">Page break</td>';
                 echo '<td><hr noshade="noshade" /></td><td width="45">';
                 if ($count > 1) {
-                    echo "<a title=\"$strmoveup\" href=\"edit.php?up=$count&amp;sesskey=$USER->sesskey\"><img
+                    echo "<a title=\"$strmoveup\" href=\"edit.php?up=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\"><img
                          src=\"$CFG->pixpath/t/up.gif\" border=\"0\" alt=\"$strmoveup\" /></a>";
                 }
                 echo '&nbsp;';
                 if ($count < $lastindex) {
-                    echo "<a title=\"$strmovedown\" href=\"edit.php?down=$count&amp;sesskey=$USER->sesskey\"><img
+                    echo "<a title=\"$strmovedown\" href=\"edit.php?down=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\"><img
                          src=\"$CFG->pixpath/t/down.gif\" border=\"0\" alt=\"$strmovedown\" /></a>";
 
-                    echo "<a title=\"$strremove\" href=\"edit.php?delete=$count&amp;sesskey=$USER->sesskey\">
+                    echo "<a title=\"$strremove\" href=\"edit.php?delete=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\">
                           <img src=\"$CFG->pixpath/t/delete.gif\" border=\"0\" alt=\"$strremove\" /></a>";
                 }
                 echo '</td></tr></table></td>';
@@ -233,13 +233,13 @@ function quiz_print_question_list($quiz, $allowdelete=true, $showbreaks=true, $r
 
         echo "<td>";
         if ($count != 0) {
-            echo "<a title=\"$strmoveup\" href=\"edit.php?up=$count&amp;sesskey=$USER->sesskey\"><img
+            echo "<a title=\"$strmoveup\" href=\"edit.php?up=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\"><img
                  src=\"$CFG->pixpath/t/up.gif\" border=\"0\" alt=\"$strmoveup\" /></a>";
         }
         echo "</td>";
         echo "<td>";
         if ($count < $lastindex-1) {
-            echo "<a title=\"$strmovedown\" href=\"edit.php?down=$count&amp;sesskey=$USER->sesskey\"><img
+            echo "<a title=\"$strmovedown\" href=\"edit.php?down=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\"><img
                  src=\"$CFG->pixpath/t/down.gif\" border=\"0\" alt=\"$strmovedown\" /></a>";
         }
         echo "</td>";
@@ -274,7 +274,7 @@ function quiz_print_question_list($quiz, $allowdelete=true, $showbreaks=true, $r
                   <img src=\"$CFG->pixpath/t/edit.gif\" border=\"0\" alt=\"$stredit\" /></a>";
         }
         if ($allowdelete) {
-            echo "<a title=\"$strremove\" href=\"edit.php?delete=$count&amp;sesskey=$USER->sesskey\">
+            echo "<a title=\"$strremove\" href=\"edit.php?delete=$count&amp;quizid=$quiz->id&amp;sesskey=$USER->sesskey\">
                   <img src=\"$CFG->pixpath/t/removeright.gif\" border=\"0\" alt=\"$strremove\" /></a>";
         }
 
@@ -300,6 +300,7 @@ function quiz_print_question_list($quiz, $allowdelete=true, $showbreaks=true, $r
 
     echo '<div align="center"><input type="submit" value="'.get_string('savechanges').'" />';
     echo '<input type="hidden" name="savechanges" value="save" /></div>';
+    echo '<input type="hidden" name="savequizid" value="'.$quiz->id.'" /></div>'; // ugly hack to prevent modform session "mistakes"
 
     print_simple_box_end();
     echo "</form>\n";
diff --git a/question/editlib.php b/question/editlib.php
index 85b5643ae1..33b3aefa39 100644
--- a/question/editlib.php
+++ b/question/editlib.php
@@ -336,7 +336,7 @@ function question_list($course, $categoryid, $quizid=0,
     foreach ($questions as $question) {
         echo "<tr>\n<td nowrap=\"nowrap\">\n";
         if ($quizid) {
-            echo "<a title=\"$straddtoquiz\" href=\"edit.php?addquestion=$question->id&amp;sesskey=$USER->sesskey\"><img
+            echo "<a title=\"$straddtoquiz\" href=\"edit.php?addquestion=$question->id&amp;quizid=$quizid&amp;sesskey=$USER->sesskey\"><img
                   src=\"$CFG->pixpath/t/moveleft.gif\" border=\"0\" alt=\"$straddtoquiz\" /></a>&nbsp;";
         }
         echo "<a title=\"$strpreview\" href=\"javascript:void();\" onClick=\"openpopup('/question/preview.php?id=$question->id&quizid=$quizid','$strpreview','scrollbars=yes,resizable=yes,width=700,height=480', false)\"><img
-- 
2.39.5