//.........这里部分代码省略.........
        // See if it exists.
        if (strpos($oldconfig, $messagesconfig) === false) {
            // See if preferences exists.
            if (strpos($oldconfig, "preferences,moodle|/user/preferences.php|preferences") !== false) {
                // Insert it before preferences.
                $newconfig = str_replace($preferencesconfig, $messagesconfig . "\n" . $preferencesconfig, $oldconfig);
            } else {
                // Custom config - we can only insert it at the end.
                $newconfig = $oldconfig . "\n" . $messagesconfig;
            }
            set_config('customusermenuitems', $newconfig);
        }
        upgrade_main_savepoint(true, 2015050401.0);
    }
    // Moodle v2.9.0 release upgrade line.
    // Put any upgrade step following this.
    if ($oldversion < 2015060400.02) {
        // Sites that were upgrading from 2.7 and older will ignore this step.
        if (empty($CFG->upgrade_minmaxgradestepignored)) {
            upgrade_minmaxgrade();
            // Flags this upgrade step as already run to prevent it from running multiple times.
            set_config('upgrade_minmaxgradestepignored', 1);
        }
        upgrade_main_savepoint(true, 2015060400.02);
    }
    if ($oldversion < 2015061900.0) {
        // MDL-49257. Changed the algorithm of calculating automatic weights of extra credit items.
        // Before the change, in case when grade category (in "Natural" agg. method) had items with
        // overridden weights, the automatic weight of extra credit items was illogical.
        // In order to prevent grades changes after the upgrade we need to freeze gradebook calculation
        // for the affected courses.
        // This script in included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_extracreditweightsstepignored)) {
            upgrade_extra_credit_weightoverride();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_extracreditweightsstepignored', 1);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015061900.0);
    }
    if ($oldversion < 2015062500.01) {
        // MDL-48239. Changed calculated grade items so that the maximum and minimum grade can be set.
        // If the changes are accepted and a regrade is done on the gradebook then some grades may change significantly.
        // This is here to freeze the gradebook in affected courses.
        // This script is included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_calculatedgradeitemsignored)) {
            upgrade_calculated_grade_items();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_calculatedgradeitemsignored', 1);
            // This config value is never used again.
            unset_config('upgrade_calculatedgradeitemsonlyregrade');
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015062500.01);
    }
    if ($oldversion < 2015081300.01) {
        // Define field importtype to be added to grade_import_values.
        $table = new xmldb_table('grade_import_values');
        $field = new xmldb_field('importonlyfeedback', XMLDB_TYPE_INTEGER, '1', null, null, null, '0', 'importer');
        // Conditionally launch add field importtype.
        if (!$dbman->field_exists($table, $field)) {
            $dbman->add_field($table, $field);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015081300.01);
    }

 public function test_upgrade_extra_credit_weightoverride()
 {
     global $DB, $CFG;
     $this->resetAfterTest(true);
     $c = array();
     $a = array();
     $gi = array();
     for ($i = 0; $i < 5; $i++) {
         $c[$i] = $this->getDataGenerator()->create_course();
         $a[$i] = array();
         $gi[$i] = array();
         for ($j = 0; $j < 3; $j++) {
             $a[$i][$j] = $this->getDataGenerator()->create_module('assign', array('course' => $c[$i], 'grade' => 100));
             $giparams = array('itemtype' => 'mod', 'itemmodule' => 'assign', 'iteminstance' => $a[$i][$j]->id, 'courseid' => $c[$i]->id, 'itemnumber' => 0);
             $gi[$i][$j] = grade_item::fetch($giparams);
         }
     }
     // Case 1: Course $c[0] has aggregation method different from natural.
     $coursecategory = grade_category::fetch_course_category($c[0]->id);
     $coursecategory->aggregation = GRADE_AGGREGATE_WEIGHTED_MEAN;
     $coursecategory->update();
     $gi[0][1]->aggregationcoef = 1;
     $gi[0][1]->update();
     $gi[0][2]->weightoverride = 1;
     $gi[0][2]->update();
     // Case 2: Course $c[1] has neither extra credits nor overrides
     // Case 3: Course $c[2] has extra credits but no overrides
     $gi[2][1]->aggregationcoef = 1;
     $gi[2][1]->update();
     // Case 4: Course $c[3] has no extra credits and has overrides
     $gi[3][2]->weightoverride = 1;
     $gi[3][2]->update();
     // Case 5: Course $c[4] has both extra credits and overrides
     $gi[4][1]->aggregationcoef = 1;
     $gi[4][1]->update();
     $gi[4][2]->weightoverride = 1;
     $gi[4][2]->update();
     // Run the upgrade script and make sure only course $c[4] was marked as needed to be fixed.
     upgrade_extra_credit_weightoverride();
     $this->assertTrue(empty($CFG->{'gradebook_calculations_freeze_' . $c[0]->id}));
     $this->assertTrue(empty($CFG->{'gradebook_calculations_freeze_' . $c[1]->id}));
     $this->assertTrue(empty($CFG->{'gradebook_calculations_freeze_' . $c[2]->id}));
     $this->assertTrue(empty($CFG->{'gradebook_calculations_freeze_' . $c[3]->id}));
     $this->assertEquals(20150619, $CFG->{'gradebook_calculations_freeze_' . $c[4]->id});
     set_config('gradebook_calculations_freeze_' . $c[4]->id, null);
     // Run the upgrade script for a single course only.
     upgrade_extra_credit_weightoverride($c[0]->id);
     $this->assertTrue(empty($CFG->{'gradebook_calculations_freeze_' . $c[0]->id}));
     upgrade_extra_credit_weightoverride($c[4]->id);
     $this->assertEquals(20150619, $CFG->{'gradebook_calculations_freeze_' . $c[4]->id});
 }

//.........这里部分代码省略.........
        // See if it exists.
        if (strpos($oldconfig, $messagesconfig) === false) {
            // See if preferences exists.
            if (strpos($oldconfig, "preferences,moodle|/user/preferences.php|preferences") !== false) {
                // Insert it before preferences.
                $newconfig = str_replace($preferencesconfig, $messagesconfig . "\n" . $preferencesconfig, $oldconfig);
            } else {
                // Custom config - we can only insert it at the end.
                $newconfig = $oldconfig . "\n" . $messagesconfig;
            }
            set_config('customusermenuitems', $newconfig);
        }
        upgrade_main_savepoint(true, 2015050401.0);
    }
    // Moodle v2.9.0 release upgrade line.
    // Put any upgrade step following this.
    if ($oldversion < 2015060400.02) {
        // Sites that were upgrading from 2.7 and older will ignore this step.
        if (empty($CFG->upgrade_minmaxgradestepignored)) {
            upgrade_minmaxgrade();
            // Flags this upgrade step as already run to prevent it from running multiple times.
            set_config('upgrade_minmaxgradestepignored', 1);
        }
        upgrade_main_savepoint(true, 2015060400.02);
    }
    if ($oldversion < 2015061900.0) {
        // MDL-49257. Changed the algorithm of calculating automatic weights of extra credit items.
        // Before the change, in case when grade category (in "Natural" agg. method) had items with
        // overridden weights, the automatic weight of extra credit items was illogical.
        // In order to prevent grades changes after the upgrade we need to freeze gradebook calculation
        // for the affected courses.
        // This script in included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_extracreditweightsstepignored)) {
            upgrade_extra_credit_weightoverride();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_extracreditweightsstepignored', 1);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015061900.0);
    }
    if ($oldversion < 2015062500.01) {
        // MDL-48239. Changed calculated grade items so that the maximum and minimum grade can be set.
        // If the changes are accepted and a regrade is done on the gradebook then some grades may change significantly.
        // This is here to freeze the gradebook in affected courses.
        // This script is included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_calculatedgradeitemsignored)) {
            upgrade_calculated_grade_items();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_calculatedgradeitemsignored', 1);
            // This config value is never used again.
            unset_config('upgrade_calculatedgradeitemsonlyregrade');
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015062500.01);
    }
    if ($oldversion < 2015081300.01) {
        // Define field importtype to be added to grade_import_values.
        $table = new xmldb_table('grade_import_values');
        $field = new xmldb_field('importonlyfeedback', XMLDB_TYPE_INTEGER, '1', null, null, null, '0', 'importer');
        // Conditionally launch add field importtype.
        if (!$dbman->field_exists($table, $field)) {
            $dbman->add_field($table, $field);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015081300.01);
    }

 /**
  * Freeze gradebook calculation if needed.
  *
  * This is similar to various upgrade scripts that check if the freeze is needed.
  */
 protected function gradebook_calculation_freeze()
 {
     global $CFG;
     $gradebookcalculationsfreeze = get_config('core', 'gradebook_calculations_freeze_' . $this->get_courseid());
     preg_match('/(\\d{8})/', $this->get_task()->get_info()->moodle_release, $matches);
     $backupbuild = (int) $matches[1];
     // The function floatval will return a float even if there is text mixed with the release number.
     $backuprelease = floatval($this->get_task()->get_info()->backup_release);
     // Extra credits need adjustments only for backups made between 2.8 release (20141110) and the fix release (20150619).
     if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150619) {
         require_once $CFG->libdir . '/db/upgradelib.php';
         upgrade_extra_credit_weightoverride($this->get_courseid());
     }
     // Calculated grade items need recalculating for backups made between 2.8 release (20141110) and the fix release (20150627).
     if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150627) {
         require_once $CFG->libdir . '/db/upgradelib.php';
         upgrade_calculated_grade_items($this->get_courseid());
     }
     // Courses from before 3.1 (20160518) may have a letter boundary problem and should be checked for this issue.
     // Backups from before and including 2.9 could have a build number that is greater than 20160518 and should
     // be checked for this problem.
     if (!$gradebookcalculationsfreeze && ($backupbuild < 20160518 || $backuprelease <= 2.9)) {
         require_once $CFG->libdir . '/db/upgradelib.php';
         upgrade_course_letter_boundary($this->get_courseid());
     }
 }

 /**
  * Freeze gradebook calculation if needed.
  *
  * This is similar to various upgrade scripts that check if the freeze is needed.
  */
 protected function gradebook_calculation_freeze()
 {
     global $CFG;
     $gradebookcalculationsfreeze = get_config('core', 'gradebook_calculations_freeze_' . $this->get_courseid());
     preg_match('/(\\d{8})/', $this->get_task()->get_info()->moodle_release, $matches);
     $backupbuild = (int) $matches[1];
     // Extra credits need adjustments only for backups made between 2.8 release (20141110) and the fix release (20150619).
     if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150619) {
         require_once $CFG->libdir . '/db/upgradelib.php';
         upgrade_extra_credit_weightoverride($this->get_courseid());
     }
     // Calculated grade items need recalculating for backups made between 2.8 release (20141110) and the fix release (20150627).
     if (!$gradebookcalculationsfreeze && $backupbuild >= 20141110 && $backupbuild < 20150627) {
         require_once $CFG->libdir . '/db/upgradelib.php';
         upgrade_calculated_grade_items($this->get_courseid());
     }
 }

//.........这里部分代码省略.........
        // See if it exists.
        if (strpos($oldconfig, $messagesconfig) === false) {
            // See if preferences exists.
            if (strpos($oldconfig, "preferences,moodle|/user/preferences.php|preferences") !== false) {
                // Insert it before preferences.
                $newconfig = str_replace($preferencesconfig, $messagesconfig . "\n" . $preferencesconfig, $oldconfig);
            } else {
                // Custom config - we can only insert it at the end.
                $newconfig = $oldconfig . "\n" . $messagesconfig;
            }
            set_config('customusermenuitems', $newconfig);
        }
        upgrade_main_savepoint(true, 2015050401.0);
    }
    // Moodle v2.9.0 release upgrade line.
    // Put any upgrade step following this.
    if ($oldversion < 2015060400.02) {
        // Sites that were upgrading from 2.7 and older will ignore this step.
        if (empty($CFG->upgrade_minmaxgradestepignored)) {
            upgrade_minmaxgrade();
            // Flags this upgrade step as already run to prevent it from running multiple times.
            set_config('upgrade_minmaxgradestepignored', 1);
        }
        upgrade_main_savepoint(true, 2015060400.02);
    }
    if ($oldversion < 2015061900.0) {
        // MDL-49257. Changed the algorithm of calculating automatic weights of extra credit items.
        // Before the change, in case when grade category (in "Natural" agg. method) had items with
        // overridden weights, the automatic weight of extra credit items was illogical.
        // In order to prevent grades changes after the upgrade we need to freeze gradebook calculation
        // for the affected courses.
        // This script in included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_extracreditweightsstepignored)) {
            upgrade_extra_credit_weightoverride();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_extracreditweightsstepignored', 1);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015061900.0);
    }
    if ($oldversion < 2015062500.01) {
        // MDL-48239. Changed calculated grade items so that the maximum and minimum grade can be set.
        // If the changes are accepted and a regrade is done on the gradebook then some grades may change significantly.
        // This is here to freeze the gradebook in affected courses.
        // This script is included in each major version upgrade process so make sure we don't run it twice.
        if (empty($CFG->upgrade_calculatedgradeitemsignored)) {
            upgrade_calculated_grade_items();
            // To skip running the same script on the upgrade to the next major release.
            set_config('upgrade_calculatedgradeitemsignored', 1);
            // This config value is never used again.
            unset_config('upgrade_calculatedgradeitemsonlyregrade');
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015062500.01);
    }
    if ($oldversion < 2015081300.01) {
        // Define field importtype to be added to grade_import_values.
        $table = new xmldb_table('grade_import_values');
        $field = new xmldb_field('importonlyfeedback', XMLDB_TYPE_INTEGER, '1', null, null, null, '0', 'importer');
        // Conditionally launch add field importtype.
        if (!$dbman->field_exists($table, $field)) {
            $dbman->add_field($table, $field);
        }
        // Main savepoint reached.
        upgrade_main_savepoint(true, 2015081300.01);
    }