PHP context_helper::preload_course方法代码示例

/**
 * Preloads all contexts relating to a course: course, modules. Block contexts
 * are no longer loaded here. The contexts for all the blocks on the current
 * page are now efficiently loaded by {@link block_manager::load_blocks()}.
 *
 * @deprecated since 2.2
 * @param int $courseid Course ID
 * @return void
 */
function preload_course_contexts($courseid)
{
    context_helper::preload_course($courseid);
}

    }
}
$course = $DB->get_record('course', $params, '*', MUST_EXIST);
$urlparams = array('id' => $course->id);
// Sectionid should get priority over section number
if ($sectionid) {
    $section = $DB->get_field('course_sections', 'section', array('id' => $sectionid, 'course' => $course->id), MUST_EXIST);
}
if ($section) {
    $urlparams['section'] = $section;
}
$PAGE->set_url('/course/view.php', $urlparams);
// Defined here to avoid notices on errors etc
// Prevent caching of this page to stop confusion when changing page after making AJAX changes
$PAGE->set_cacheable(false);
context_helper::preload_course($course->id);
$context = context_course::instance($course->id, MUST_EXIST);
// Remove any switched roles before checking login
if ($switchrole == 0 && confirm_sesskey()) {
    role_switch($switchrole, $context);
}
require_login($course);
// Switchrole - sanity check in cost-order...
$reset_user_allowed_editing = false;
if ($switchrole > 0 && confirm_sesskey() && has_capability('moodle/role:switchroles', $context)) {
    // is this role assignable in this context?
    // inquiring minds want to know...
    $aroles = get_switchable_roles($context);
    if (is_array($aroles) && isset($aroles[$switchrole])) {
        role_switch($switchrole, $context);
        // Double check that this role is allowed here

/**
 * Preloads all contexts relating to a course: course, modules. Block contexts
 * are no longer loaded here. The contexts for all the blocks on the current
 * page are now efficiently loaded by {@link block_manager::load_blocks()}.
 *
 * @deprecated since Moodle 2.2
 * @see context_helper::preload_course()
 * @param int $courseid Course ID
 * @return void
 */
function preload_course_contexts($courseid)
{
    debugging('preload_course_contexts() is deprecated, please use context_helper::preload_course() instead.', DEBUG_DEVELOPER);
    context_helper::preload_course($courseid);
}

//.........这里部分代码省略.........
        unset($countcourses);
        unset($countblocks);


        // ======= context_helper::reset_caches() ============================

        context_helper::reset_caches();
        $this->assertEquals(context_inspection::test_context_cache_size(), 0);
        context_course::instance($SITE->id);
        $this->assertEquals(context_inspection::test_context_cache_size(), 1);


        // ======= context preloading ========================================

        context_helper::reset_caches();
        $sql = "SELECT ".context_helper::get_preload_record_columns_sql('c')."
                  FROM {context} c
                 WHERE c.contextlevel <> ".CONTEXT_SYSTEM;
        $records = $DB->get_records_sql($sql);
        $firstrecord = reset($records);
        $columns = context_helper::get_preload_record_columns('c');
        $firstrecord = (array)$firstrecord;
        $this->assertSame(array_keys($firstrecord), array_values($columns));
        context_helper::reset_caches();
        foreach ($records as $record) {
            context_helper::preload_from_record($record);
            $this->assertEquals($record, new stdClass());
        }
        $this->assertEquals(context_inspection::test_context_cache_size(), count($records));
        unset($records);
        unset($columns);

        context_helper::reset_caches();
        context_helper::preload_course($SITE->id);
        $this->assertEquals(7, context_inspection::test_context_cache_size()); // depends on number of default blocks

        // ====== assign_capability(), unassign_capability() ====================

        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertFalse($rc);
        assign_capability('moodle/site:accessallgroups', CAP_ALLOW, $allroles['teacher'], $frontpagecontext->id);
        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertEquals($rc->permission, CAP_ALLOW);
        assign_capability('moodle/site:accessallgroups', CAP_PREVENT, $allroles['teacher'], $frontpagecontext->id);
        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertEquals($rc->permission, CAP_ALLOW);
        assign_capability('moodle/site:accessallgroups', CAP_PREVENT, $allroles['teacher'], $frontpagecontext, true);
        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertEquals($rc->permission, CAP_PREVENT);

        assign_capability('moodle/site:accessallgroups', CAP_INHERIT, $allroles['teacher'], $frontpagecontext);
        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertFalse($rc);
        assign_capability('moodle/site:accessallgroups', CAP_ALLOW, $allroles['teacher'], $frontpagecontext);
        unassign_capability('moodle/site:accessallgroups', $allroles['teacher'], $frontpagecontext, true);
        $rc = $DB->get_record('role_capabilities', array('contextid'=>$frontpagecontext->id, 'roleid'=>$allroles['teacher'], 'capability'=>'moodle/site:accessallgroups'));
        $this->assertFalse($rc);
        unassign_capability('moodle/site:accessallgroups', $allroles['teacher'], $frontpagecontext->id, true);
        unset($rc);

        accesslib_clear_all_caches(false); // must be done after assign_capability()


        // ======= role_assign(), role_unassign(), role_unassign_all() ==============

        $context = context_course::instance($testcourses[1]);

    /**
     * Constructs based on course.
     * Note: This constructor should not usually be called directly.
     * Use get_fast_modinfo($course) instead as this maintains a cache.
     * @param stdClass $course course object, only property id is required.
     * @param int $userid User ID
     * @throws moodle_exception if course is not found
     */
    public function __construct($course, $userid) {
        global $CFG, $COURSE, $SITE, $DB;

        if (!isset($course->cacherev)) {
            // We require presence of property cacherev to validate the course cache.
            // No need to clone the $COURSE or $SITE object here because we clone it below anyway.
            $course = get_course($course->id, false);
        }

        $cachecoursemodinfo = cache::make('core', 'coursemodinfo');

        // Retrieve modinfo from cache. If not present or cacherev mismatches, call rebuild and retrieve again.
        $coursemodinfo = $cachecoursemodinfo->get($course->id);
        if ($coursemodinfo === false || ($course->cacherev != $coursemodinfo->cacherev)) {
            $coursemodinfo = self::build_course_cache($course);
        }

        // Set initial values
        $this->userid = $userid;
        $this->sections = array();
        $this->cms = array();
        $this->instances = array();
        $this->groups = null;

        // If we haven't already preloaded contexts for the course, do it now
        // Modules are also cached here as long as it's the first time this course has been preloaded.
        context_helper::preload_course($course->id);

        // Quick integrity check: as a result of race conditions modinfo may not be regenerated after the change.
        // It is especially dangerous if modinfo contains the deleted course module, as it results in fatal error.
        // We can check it very cheap by validating the existence of module context.
        if ($course->id == $COURSE->id || $course->id == $SITE->id) {
            // Only verify current course (or frontpage) as pages with many courses may not have module contexts cached.
            // (Uncached modules will result in a very slow verification).
            foreach ($coursemodinfo->modinfo as $mod) {
                if (!context_module::instance($mod->cm, IGNORE_MISSING)) {
                    debugging('Course cache integrity check failed: course module with id '. $mod->cm.
                            ' does not have context. Rebuilding cache for course '. $course->id);
                    // Re-request the course record from DB as well, don't use get_course() here.
                    $course = $DB->get_record('course', array('id' => $course->id), '*', MUST_EXIST);
                    $coursemodinfo = self::build_course_cache($course);
                    break;
                }
            }
        }

        // Overwrite unset fields in $course object with cached values, store the course object.
        $this->course = fullclone($course);
        foreach ($coursemodinfo as $key => $value) {
            if ($key !== 'modinfo' && $key !== 'sectioncache' &&
                    (!isset($this->course->$key) || $key === 'cacherev')) {
                $this->course->$key = $value;
            }
        }

        // Loop through each piece of module data, constructing it
        static $modexists = array();
        foreach ($coursemodinfo->modinfo as $mod) {
            if (empty($mod->name)) {
                // something is wrong here
                continue;
            }

            // Skip modules which don't exist
            if (!array_key_exists($mod->mod, $modexists)) {
                $modexists[$mod->mod] = file_exists("$CFG->dirroot/mod/$mod->mod/lib.php");
            }
            if (!$modexists[$mod->mod]) {
                continue;
            }

            // Construct info for this module
            $cm = new cm_info($this, null, $mod, null);

            // Store module in instances and cms array
            if (!isset($this->instances[$cm->modname])) {
                $this->instances[$cm->modname] = array();
            }
            $this->instances[$cm->modname][$cm->instance] = $cm;
            $this->cms[$cm->id] = $cm;

            // Reconstruct sections. This works because modules are stored in order
            if (!isset($this->sections[$cm->sectionnum])) {
                $this->sections[$cm->sectionnum] = array();
            }
            $this->sections[$cm->sectionnum][] = $cm->id;
        }

        // Expand section objects
        $this->sectioninfo = array();
        foreach ($coursemodinfo->sectioncache as $number => $data) {
            $this->sectioninfo[$number] = new section_info($data, $number, null, null,
//.........这里部分代码省略.........

//.........这里部分代码省略.........
     $this->assertEqual(count($children), 3);
     $context = context_module::instance($testpages[3]);
     $children = $context->get_child_contexts();
     $this->assertEqual(count($children), 1);
     $context = context_block::instance($testblocks[1]);
     $children = $context->get_child_contexts();
     $this->assertEqual(count($children), 0);
     unset($children);
     unset($countcats);
     unset($countcourses);
     unset($countblocks);
     // ======= context_helper::reset_caches() ============================
     context_helper::reset_caches();
     $this->assertEqual(context_inspection::test_context_cache_size(), 0);
     context_course::instance($SITE->id);
     $this->assertEqual(context_inspection::test_context_cache_size(), 1);
     // ======= context preloading ========================================
     context_helper::reset_caches();
     $sql = "SELECT " . context_helper::get_preload_record_columns_sql('c') . "\n                  FROM {context} c\n                 WHERE c.contextlevel <> " . CONTEXT_SYSTEM;
     $records = $DB->get_records_sql($sql);
     $firstrecord = reset($records);
     $columns = context_helper::get_preload_record_columns('c');
     $firstrecord = (array) $firstrecord;
     $this->assertIdentical(array_keys($firstrecord), array_values($columns));
     context_helper::reset_caches();
     foreach ($records as $record) {
         context_helper::preload_from_record($record);
         $this->assertIdentical($record, new stdClass());
     }
     $this->assertEqual(context_inspection::test_context_cache_size(), count($records));
     unset($records);
     unset($columns);
     context_helper::reset_caches();
     context_helper::preload_course($SITE->id);
     $this->assertEqual(context_inspection::test_context_cache_size(), 4);
     // ====== assign_capability(), unassign_capability() ====================
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertFalse($rc);
     assign_capability('moodle/site:accessallgroups', CAP_ALLOW, $allroles['teacher'], $frontpagecontext->id);
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertEqual($rc->permission, CAP_ALLOW);
     assign_capability('moodle/site:accessallgroups', CAP_PREVENT, $allroles['teacher'], $frontpagecontext->id);
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertEqual($rc->permission, CAP_ALLOW);
     assign_capability('moodle/site:accessallgroups', CAP_PREVENT, $allroles['teacher'], $frontpagecontext, true);
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertEqual($rc->permission, CAP_PREVENT);
     assign_capability('moodle/site:accessallgroups', CAP_INHERIT, $allroles['teacher'], $frontpagecontext);
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertFalse($rc);
     assign_capability('moodle/site:accessallgroups', CAP_ALLOW, $allroles['teacher'], $frontpagecontext);
     unassign_capability('moodle/site:accessallgroups', $allroles['teacher'], $frontpagecontext, true);
     $rc = $DB->get_record('role_capabilities', array('contextid' => $frontpagecontext->id, 'roleid' => $allroles['teacher'], 'capability' => 'moodle/site:accessallgroups'));
     $this->assertFalse($rc);
     unassign_capability('moodle/site:accessallgroups', $allroles['teacher'], $frontpagecontext->id, true);
     unset($rc);
     accesslib_clear_all_caches(false);
     // must be done after assign_capability()
     // ======= role_assign(), role_unassign(), role_unassign_all() ==============
     $context = context_course::instance($testcourses[1]);
     $this->assertEqual($DB->count_records('role_assignments', array('contextid' => $context->id)), 0);
     role_assign($allroles['teacher'], $testusers[1], $context->id);
     role_assign($allroles['teacher'], $testusers[2], $context->id);
     role_assign($allroles['manager'], $testusers[1], $context->id);
     $this->assertEqual($DB->count_records('role_assignments', array('contextid' => $context->id)), 3);
     role_unassign($allroles['teacher'], $testusers[1], $context->id);