/**
* This is function deletes a mail according to the parameter in the post request.
* the records to the page.
*
*/
private function delete_mail()
{
$msgid = required_param('messageid', PARAM_INT);
$mailrecord = new mail_record($msgid);
$mailrecord->delete_mail($this->courseid);
}
/**
* This function tests deleting a mail. One of the emails in the starter
* DB is deleted, then I check to make sure it is gone.
*
*/
public function test_delete_mail()
{
global $DB;
$courseid = $this->testcourseid;
// Try deleting a mail the user does not own.
$this->setUser($this->martha);
// Grab the mail with an attachment.
$query = "SELECT * FROM {course_message_mails} WHERE message = 'This mail will be deleted.'";
$record = $DB->get_record_sql($query);
$mailid = intval($record->id);
// Note the explicit conversion to an int here.
$mailrecord = new mail_record($mailid, false);
$mailrecord->delete_mail($courseid);
// Make sure no copies were deleted.
$res = $DB->get_records('course_message_mail_map', array('mailid' => $mailid));
$this->assertEquals(count($res), 2);
// Now work on mails the user owns.
$this->setUser($this->friend);
// Use same mail.
$mailrecord = new mail_record($mailid, false);
$mailrecord->delete_mail($courseid);
// See if Friend's copy was deleted.
$res = $DB->get_records('course_message_mail_map', array('mailid' => $mailid, 'userid' => $this->friend->id));
$this->assertEquals(count($res), 0);
// But ensure that Craig still has his copy.
$res = $DB->get_records('course_message_mail_map', array('mailid' => $mailid, 'userid' => $this->craig->id));
$this->assertEquals(count($res), 1);
// Ensure that the mails table copy is still there.
$res = $DB->get_records('course_message_mails', array('id' => $mailid));
$this->assertEquals(count($res), 1);
// And that the attachment is as well.
$res = $DB->get_records('files', array('itemid' => $record->attachment));
$this->assertEquals(count($res), 2);
// Now delete Craig's copy -> this should chain to delete the mail entirely.
$this->setUser($this->craig);
$mailrecord = new mail_record($mailid, false);
$mailrecord->delete_mail($courseid);
// Check to see if map record was deleted.
$res = $DB->get_records('course_message_mail_map', array('mailid' => $mailid, 'userid' => $this->craig->id));
$this->assertEquals(count($res), 0);
// Now the record in the mails table should be gone too -> no remaining references.
$res = $DB->get_records('course_message_mails', array('id' => $mailid));
$this->assertEquals(count($res), 0);
// And that the attachment should be gone as well.
$res = $DB->get_records('files', array('itemid' => $record->attachment));
$this->assertEquals(count($res), 0);
}