<?PHP // $Id$

function quiz_upgrade($oldversion) {
// This function does anything necessary to upgrade
// older versions to match current functionality

    global $CFG;

    if ($oldversion < 2003010100) {
        execute_sql(" ALTER TABLE {$CFG->prefix}quiz ADD review integer DEFAULT '0' NOT NULL AFTER `grademethod` ");
    }

    if ($oldversion < 2003010301) {
        table_column("quiz_truefalse", "true", "trueanswer", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "");
        table_column("quiz_truefalse", "false", "falseanswer", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "");
        table_column("quiz_questions", "type", "qtype", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "");
    }

    if ($oldversion < 2003022303) {
        modify_database ("", "CREATE TABLE prefix_quiz_randommatch (
                                  id SERIAL PRIMARY KEY,
                                  question integer NOT NULL default '0',
                                  choose integer NOT NULL default '4'
                              );");
    }
    if ($oldversion < 2003030303) {
        table_column("quiz_questions", "", "defaultgrade", "INTEGER", "6", "UNSIGNED", "1", "NOT NULL", "image");
    }

	if ($oldversion < 2003033100) {
        modify_database ("", "ALTER TABLE prefix_quiz_randommatch RENAME prefix_quiz_randomsamatch ");
        modify_database ("", "CREATE TABLE prefix_quiz_match_sub (
                                 id SERIAL PRIMARY KEY,
                                 question integer NOT NULL default '0',
                                 questiontext text NOT NULL default '',
                                 answertext varchar(255) NOT NULL default ''
                              );");
        modify_database ("", "CREATE INDEX prefix_quiz_match_sub_question_idx ON prefix_quiz_match_sub (question);");

        modify_database ("", "CREATE TABLE prefix_quiz_multichoice (
                                 id SERIAL PRIMARY KEY,
                                 question integer NOT NULL default '0',
                                 layout integer NOT NULL default '0',
                                 answers varchar(255) NOT NULL default '',
                                 single integer NOT NULL default '0'
                               );");
        modify_database ("", "CREATE INDEX prefix_quiz_multichoice_question_idx ON prefix_quiz_multichoice (question);");
    }

    if ($oldversion < 2003040901) {
        table_column("quiz", "", "shufflequestions", "INTEGER", "5", "UNSIGNED", "0", "NOT NULL", "review");
        table_column("quiz", "", "shuffleanswers", "INTEGER", "4", "UNSIGNED", "0", "NOT NULL", "shufflequestions");
    }
    if ($oldversion < 2003042702) {
        modify_database ("", "CREATE TABLE prefix_quiz_match (
                                 id SERIAL PRIMARY KEY,
                                 question integer NOT NULL default '0',
                                 subquestions varchar(255) NOT NULL default ''
                               );");
        modify_database ("", "CREATE INDEX prefix_quiz_match_question_idx ON prefix_quiz_match (question);");
    }
    if ($oldversion < 2003071001) {
        modify_database ("", " CREATE TABLE prefix_quiz_numerical (
                               id SERIAL PRIMARY KEY,
                               question integer NOT NULL default '0',
                               answer integer NOT NULL default '0',
                               min varchar(255) NOT NULL default '',
                               max varchar(255) NOT NULL default ''
                               ); ");
        modify_database ("", "CREATE INDEX prefix_quiz_numerical_answer_idx ON prefix_quiz_numerical (answer);");
    }

	if ($oldversion < 2003072400) {
        execute_sql(" INSERT INTO {$CFG->prefix}log_display VALUES ('quiz', 'review', 'quiz', 'name') ");
    }

    if ($oldversion < 2003082300) {
        modify_database ("", " CREATE TABLE prefix_quiz_multianswers (
                               id SERIAL PRIMARY KEY,
                               question integer NOT NULL default '0',
                               answers varchar(255) NOT NULL default '',
                               positionkey varchar(255) NOT NULL default '',
                               answertype integer NOT NULL default '0',
                               norm integer NOT NULL default '1'
                              ); ");
        modify_database ("", "CREATE INDEX prefix_quiz_multianswers_question_idx ON prefix_quiz_multianswers (question);");

        table_column("quiz", "", "attemptonlast", "INTEGER", "10", "UNSIGNED", "0", "NOT NULL", "attempts");

        table_column("quiz_questions", "", "stamp", "varchar", "255", "", "qtype");
    }

    if ($oldversion < 2003082301) {
        table_column("quiz_questions", "", "version", "integer", "10", "", "1", "not null", "stamp");
        if ($questions = get_records("quiz_questions")) {
            foreach ($questions as $question) {
                $stamp = make_unique_id_code();
                if (!set_field("quiz_questions", "stamp", $stamp, "id", $question->id)) {
                    notify("Error while adding stamp to question id = $question->id");
                }
            }
        }
    }

    if ($oldversion < 2003082700) {
        table_column("quiz_categories", "", "stamp", "varchar", "255", "", "", "not null");
        if ($categories = get_records("quiz_categories")) {
            foreach ($categories as $category) {
                $stamp = make_unique_id_code();
                if (!set_field("quiz_categories", "stamp", $stamp, "id", $category->id)) {
                    notify("Error while adding stamp to category id = $category->id");
                }
            }
        }
    }

    return true;
}

?>