Add two new fields for time enforced delay between two quizzes

mod/quiz/db/mysql.php

@@ -869,6 +869,13 @@ function quiz_upgrade($oldversion) {
         $record = get_record_sql("SELECT max(id)+1 AS nextid FROM {$CFG->prefix}quiz_attempts");
         set_config('attemptuniqueid', empty($record->nextid) ? 1 : $record->nextid);
     }
+    
+    if ($oldversion < 2006020801) {
+        // add new field to store time delay between the first and second quiz attempt
+        table_column('quiz', '', 'delay1', 'integer', '10', 'unsigned', '0', 'not null', 'popup');
+        // add new field to store time delay between the second and any additional quizes
+        table_column('quiz', '', 'delay2', 'integer', '10', 'unsigned', '0', 'not null', 'delay1');
+    }
 
     return true;
 }

mod/quiz/db/mysql.sql

@@ -42,6 +42,8 @@ CREATE TABLE prefix_quiz (
   password varchar(255) NOT NULL default '',
   subnet varchar(255) NOT NULL default '',
   popup tinyint(4) NOT NULL default '0',
+  delay1 int(10) NOT NULL default '0',
+  delay2 int(10) NOT NULL default '0',
   PRIMARY KEY  (id),
   KEY course (course)
 ) TYPE=MyISAM COMMENT='Main information about each quiz';

mod/quiz/db/postgres7.php

@@ -968,7 +968,10 @@ function quiz_upgrade($oldversion) {
         execute_sql('ALTER TABLE '.$CFG->prefix.'quiz_question_version_id_seq RENAME TO '.$CFG->prefix.'quiz_question_versions_id_seq',false);
         execute_sql('ALTER TABLE '.$CFG->prefix.'quiz_question_versions ALTER COLUMN id SET DEFAULT nextval(\''.$CFG->prefix.'quiz_question_versions_id_seq\')',false);
     }
-
+    if ($oldversion < 2006020801) {
+         table_column("quiz", "", "delay1", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "popup");
+         table_column("quiz", "", "delay2", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "delay1");
+    }
     return true;
 }
 

mod/quiz/db/postgres7.sql

@@ -38,7 +38,9 @@ CREATE TABLE prefix_quiz (
   timelimit integer NOT NULL default '0',
   password varchar(255) NOT NULL default '',
   subnet varchar(255) NOT NULL default '',
-  popup integer NOT NULL default '0'
+  popup integer NOT NULL default '0',
+  delay1 integer NOT NULL default '0',
+  delay2 integer NOT NULL default '0'
 );
 
 CREATE INDEX prefix_quiz_course_idx ON prefix_quiz (course);