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<?php
/******************************************************************************/
/****************************** DELETION FUNCTIONS ****************************/
/******************************************************************************/
function delete_solution($solution_id)
{
global $user;
$root_path = lab_migration_path();
$status = TRUE;
$solution_q = db_query("SELECT * FROM {lab_migration_solution} WHERE id = %d", $solution_id);
$solution_data = db_fetch_object($solution_q);
if (!$solution_data)
{
drupal_set_message(t('Invalid solution.'), 'error');
return FALSE;
}
$experiment_q = db_query("SELECT * FROM {lab_migration_experiment} WHERE id = %d", $solution_data->experiment_id);
$experiment_data = db_fetch_object($experiment_q);
if (!$experiment_data)
{
drupal_set_message(t('Invalid experiment.'), 'error');
return FALSE;
}
/* deleting solution files */
$solution_files_q = db_query("SELECT * FROM {lab_migration_solution_files} WHERE solution_id = %d", $solution_id);
while ($solution_files_data = db_fetch_object($solution_files_q))
{
if (!file_exists($root_path . $solution_files_data->filepath))
{
$status = FALSE;
drupal_set_message(t('Error deleting !file. File does not exists.', array('!file' => $solution_files_data->filepath)), 'error');
continue;
}
/* removing solution file */
if (!unlink($root_path . $solution_files_data->filepath))
{
$status = FALSE;
drupal_set_message(t('Error deleting !file', array('!file' => $solution_files_data->filepath)), 'error');
/* sending email to admins */
$email_to = variable_get('lab_migration_emails', '');
$param['standard']['subject'] = "[ERROR] Error deleting example file";
$param['standard']['body'] = "Error deleting solution files by " . $user->uid . " at " . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . " :
solution id : " . $solution_id . "
file id : " . $solution_files_data->id . "
file path : " . $solution_files_data->filepath;
if (!drupal_mail('lab_migration', 'standard', $email_to, language_default(), $param, variable_get('lab_migration_from_email', NULL), TRUE))
drupal_set_message('Error sending email message.', 'error');
} else {
/* deleting example files database entries */
db_query("DELETE FROM {lab_migration_solution_files} WHERE id = %d", $solution_files_data->id);
}
}
if (!$status)
return FALSE;
/* removing code folder */
$ex_path = $experiment_data->proposal_id . '/EXP' . $experiment_data->number . '/CODE' . $solution_data->code_number;
$dir_path = $root_path . $ex_path;
if (is_dir($dir_path))
{
if (!rmdir($dir_path))
{
drupal_set_message(t('Error deleting folder !folder', array('!folder' => $dir_path)), 'error');
/* sending email to admins */
$email_to = variable_get('lab_migration_emails', '');
$param['standard']['subject'] = "[ERROR] Error deleting folder";
$param['standard']['body'] = "Error deleting folder " . $dir_path . " by " . $user->uid . " at " . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
if (!drupal_mail('lab_migration', 'standard', $email_to, language_default(), $param, variable_get('lab_migration_from_email', NULL), TRUE))
drupal_set_message('Error sending email message.', 'error');
return FALSE;
}
} else {
drupal_set_message(t('Cannot delete solution folder. !folder does not exists.', array('!folder' => $dir_path)), 'error');
return FALSE;
}
/* deleting solution dependency and solution database entries */
db_query("DELETE FROM {lab_migration_solution_dependency} WHERE solution_id = %d", $solution_id);
db_query("DELETE FROM {lab_migration_solution} WHERE id = %d", $solution_id);
return $status;
}
function delete_experiment($experiment_id)
{
$status = TRUE;
$root_path = lab_migration_path();
$experiment_q = db_query("SELECT * FROM {lab_migration_chapter} WHERE id = %d", $experiment_id);
$experiment_data = db_fetch_object($experiment_q);
if (!$experiment_data)
{
drupal_set_message('Invalid experiment.', 'error');
return FALSE;
}
/* deleting solutions */
$solution_q = db_query("SELECT * FROM {lab_migration_solution} WHERE experiment_id = %d", $experiment_id);
while ($solution_data = db_fetch_object($solution_q))
{
if (!delete_solution($solution_data->id))
$status = FALSE;
}
if ($status)
{
$dir_path = $root_path . $experiment_data->proposal_id . '/EXP' . $experiment_data->number;
if (is_dir($dir_path))
{
$res = rmdir($dir_path);
if (!$res)
{
drupal_set_message(t('Error deleting experiment folder !folder', array('!folder' => $dir_path)), 'error');
/* sending email to admins */
$email_to = variable_get('lab_migration_emails', '');
$param['standard']['subject'] = "[ERROR] Error deleting experiment folder";
$param['standard']['body'] = "Error deleting folder " . $dir_path;
if (!drupal_mail('lab_migration', 'standard', $email_to, language_default(), $param, variable_get('lab_migration_from_email', NULL), TRUE))
drupal_set_message('Error sending email message.', 'error');
return FALSE;
} else {
return TRUE;
}
} else {
drupal_set_message(t('Cannot delete experiment folder. !folder does not exists.', array('!folder' => $dir_path)), 'error');
return FALSE;
}
}
return FALSE;
}
function delete_lab($lab_id)
{
$status = TRUE;
$root_path = lab_migration_path();
$proposal_q = db_query("SELECT * FROM {lab_migration_proposal} WHERE id = %d", $lab_id);
$proposal_data = db_fetch_object($proposal_q);
if (!$proposal_data)
{
drupal_set_message('Invalid Lab.', 'error');
return FALSE;
}
/* delete experiments */
$experiment_q = db_query("SELECT * FROM {lab_migration_chapter} WHERE proposal_id = %d", $proposal_data->id);
while ($experiment_data = db_fetch_object($experiment_q))
{
if (!delete_experiment($experiment_data->id))
{
$status = FALSE;
}
}
return $status;
}
function delete_file($file_id)
{
$root_path = lab_migration_path();
$file_q = db_query("SELECT * FROM {lab_migration_solution_files} WHERE id = %d LIMIT 1", $file_id);
$file_data = db_fetch_object($file_q);
if (!$file_data)
{
drupal_set_message('Invalid file specified.', 'error');
return FALSE;
}
if (!file_exists($root_path . $file_data->filepath))
{
drupal_set_message(t('Error deleting !file. File does not exists.', array('!file' => $file_data->filepath)), 'error');
return FALSE;
}
/* removing solution file */
if (!unlink($root_path . $file_data->filepath))
{
drupal_set_message(t('Error deleting !file', array('!file' => $file_data->filepath)), 'error');
/* sending email to admins */
$email_to = variable_get('lab_migration_emails', '');
$param['standard']['subject'] = "[ERROR] Error deleting file";
$param['standard']['body'] = "Error deleting file by " . $user->uid . " at " . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] . " :
file id : " . $file_id . "
file path : " . $file_data->filepath;
if (!drupal_mail('lab_migration', 'standard', $email_to, language_default(), $param, variable_get('lab_migration_from_email', NULL), TRUE))
drupal_set_message('Error sending email message.', 'error');
return FALSE;
} else {
/* deleting example files database entries */
db_query("DELETE FROM {lab_migration_solution_files} WHERE id = %d", $file_id);
return TRUE;
}
}
function del_lab_pdf($lab_id)
{
$root_path = lab_migration_path();
$dir_path = $root_path . "latex/";
$pdf_filename = "lab_" . $lab_id . ".pdf";
if (file_exists($dir_path . $pdf_filename))
unlink($dir_path . $pdf_filename);
}
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