<?php
/* For licensing terms, see /license.txt */
/**
 * This tool allows platform admins to add skills by uploading a CSV or XML file
 * @package chamilo.admin
 * @documentation Some interesting basic skills can be found in the "Skills"
 * section here: http://en.wikipedia.org/wiki/Personal_knowledge_management
 */


$cidReset = true;
require '../inc/global.inc.php';

/**
 * Validate the imported data.
 * @param $skills
 * @return array
 */
function validate_data($skills)
{
    $errors = array();
    $skills = array();
    // 1. Check if mandatory fields are set.
    $mandatory_fields = array('id', 'parent_id', 'name');
    foreach ($skills as $index => $skill) {
        foreach ($mandatory_fields as $field) {
            if (empty($skill[$field])) {
                $skill['error'] = get_lang(ucfirst($field).'Mandatory');
                $errors[] = $skill;
            }
        }
        // 2. Check skill ID is not empty
        if (!isset($skill['id']) || empty($skill['id'])) {
            $skill['error'] = get_lang('SkillImportNoID');
            $errors[] = $skill;
        }
        // 3. Check skill Parent
        if (!isset($skill['parent_id'])) {
            $skill['error'] = get_lang('SkillImportNoParent');
            $errors[] = $skill;
        }
        // 4. Check skill Name
        if (!isset($skill['name'])) {
            $skill['error'] = get_lang('SkillImportNoName');
            $errors[] = $skill;
        }
    }

    return $errors;
}

/**
 * Save the imported data
 * @param   array   List of users
 * @return  void
 * @uses global variable $inserted_in_course,
 * which returns the list of courses the user was inserted in
 */
function save_data($skills)
{
    if (is_array($skills)) {
        $parents = array();
        foreach ($skills as $index => $skill) {
            if (isset($parents[$skill['parent_id']])) {
                $skill['parent_id'] = $parents[$skill['parent_id']];
            } else {
                $skill['parent_id'] = 1;
            }
            $skill['a'] = 'add';
            $saved_id = $skill['id'];
            $skill['id'] = null;
            $oskill = new Skill();
            $skill_id = $oskill->add($skill);
            $parents[$saved_id] = $skill_id;
		}
    }
}

/**
 * Read the CSV-file
 * @param string $file Path to the CSV-file
 * @return array All userinformation read from the file
 */
function parse_csv_data($file)
{
	$skills = Import :: csvToArray($file);
	foreach ($skills as $index => $skill) {
		$skills[$index] = $skill;
	}
	return $skills;
}

/**
 * XML-parser: handle start of element
 */
function element_start($parser, $data)
{
	$data = api_utf8_decode($data);
	global $skill;
	global $current_tag;
	switch ($data) {
		case 'Skill' :
			$skill = array ();
			break;
		default :
			$current_tag = $data;
	}
}

/**
 * XML-parser: handle end of element
 */
function element_end($parser, $data)
{
	$data = api_utf8_decode($data);
	global $skill;
	global $skills;
	global $current_value;
	switch ($data) {
		case 'Skill' :
			$skills[] = $skill;
			break;
		default :
			$skill[$data] = $current_value;
			break;
	}
}

/**
 * XML-parser: handle character data
 */
function character_data($parser, $data)
{
	$data = trim(api_utf8_decode($data));
	global $current_value;
	$current_value = $data;
}

/**
 * Read the XML-file
 * @param string $file Path to the XML-file
 * @return array All userinformation read from the file
 */
function parse_xml_data($file)
{
	global $current_tag;
	global $current_value;
	global $skill;
	global $skills;
	$skills = array();
	$parser = xml_parser_create('UTF-8');
	xml_set_element_handler($parser, 'element_start', 'element_end');
	xml_set_character_data_handler($parser, 'character_data');
	xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false);
	xml_parse($parser, api_utf8_encode_xml(file_get_contents($file)));
	xml_parser_free($parser);

	return $skills;
}

$this_section = SECTION_PLATFORM_ADMIN;
api_protect_admin_script(true);

$tool_name = get_lang('ImportSkillsListCSV');
$interbreadcrumb[] = array ("url" => 'index.php', "name" => get_lang('PlatformAdmin'));

set_time_limit(0);
$extra_fields = UserManager::get_extra_fields(0, 0, 5, 'ASC', true);
$user_id_error = array();
$error_message = '';

if (!empty($_POST['formSent']) && $_FILES['import_file']['size'] !== 0) {
	$file_type = $_POST['file_type'];
	Security::clear_token();
	$tok = Security::get_token();
	$allowed_file_mimetype = array('csv','xml');
	$error_kind_file = false;
    $error_message = '';

	$ext_import_file = substr($_FILES['import_file']['name'], (strrpos($_FILES['import_file']['name'],'.')+1));

	if (in_array($ext_import_file,$allowed_file_mimetype)) {
		if (strcmp($file_type, 'csv') === 0 && $ext_import_file == $allowed_file_mimetype[0]) {
			$skills	= parse_csv_data($_FILES['import_file']['tmp_name']);
			$errors = validate_data($skills);
			$error_kind_file = false;
		} elseif (strcmp($file_type, 'xml') === 0 && $ext_import_file == $allowed_file_mimetype[1]) {
			$skills = parse_xml_data($_FILES['import_file']['tmp_name']);
			$errors = validate_data($skills);
			$error_kind_file = false;
		} else {
			$error_kind_file = true;
		}
	} else {
		$error_kind_file = true;
	}

	// List skill id whith error.
	$skills_to_insert = $skill_id_error = array();
	if (is_array($errors)) {
		foreach ($errors as $my_errors) {
			$skill_id_error[] = $my_errors['SkillName'];
		}
	}
	if (is_array($skills)) {
		foreach ($skills as $my_skill) {
			if (isset($my_skill['name']) && !in_array($my_skill['name'], $skill_id_error)) {
				$skills_to_insert[] = $my_skill;
			}
		}
	}

	if (strcmp($file_type, 'csv') === 0) {
		save_data($skills_to_insert);
	} elseif (strcmp($file_type, 'xml') === 0) {
		save_data($skills_to_insert);
	} else {
		$error_message = get_lang('YouMustImportAFileAccordingToSelectedOption');
	}

	if (count($errors) > 0) {
		$see_message_import = get_lang('FileImportedJustSkillsThatAreNotRegistered');
	} else {
		$see_message_import = get_lang('FileImported');
	}

	if (count($errors) != 0) {
		$warning_message = '<ul>';
		foreach ($errors as $index => $error_skill) {
			$warning_message .= '<li><b>'.$error_skill['error'].'</b>: ';
			$warning_message .= '<strong>'.$error_skill['SkillName'].'</strong>&nbsp;('.$error_skill['SkillName'].')';
			$warning_message .= '</li>';
		}
		$warning_message .= '</ul>';
	}

	// if the warning message is too long then we display the warning message trough a session
	if (!empty($warning_message) && api_strlen($warning_message) > 150) {
		$_SESSION['session_message_import_skills'] = $warning_message;
		$warning_message = 'session_message';
	}

    if ($error_kind_file) {
		$error_message = get_lang('YouMustImportAFileAccordingToSelectedOption');
	} else {
		//header('Location: '.api_get_path(WEB_CODE_PATH).'admin/skills_import.php?action=show_message&warn='.urlencode($warning_message).'&message='.urlencode($see_message_import).'&sec_token='.$tok);
		//exit;
	}

}
Display :: display_header($tool_name);

if (!empty($error_message)) {
	Display::display_error_message($error_message);
}
if (!empty($see_message_import)) {
	Display::display_normal_message($see_message_import);
}

$form = new FormValidator('user_import','post','skills_import.php');
$form->addElement('header', '', $tool_name);
$form->addElement('hidden', 'formSent');
$form->addElement('file', 'import_file', get_lang('ImportFileLocation'));
$group = array();
$group[] = $form->createElement('radio', 'file_type', '', 'CSV (<a href="skill_example.csv" target="_blank">'.get_lang('ExampleCSVFile').'</a>)', 'csv');
$form->addGroup($group, '', get_lang('FileType'), '<br/>');
$form->addButtonImport(get_lang('Import'));
$defaults['formSent'] = 1;
$defaults['sendMail'] = 0;
$defaults['file_type'] = 'csv';
$form->setDefaults($defaults);
$form->display();

$list = array();
$list_reponse = array();
$result_xml = '';
$i = 0;
$count_fields = count($extra_fields);
if ($count_fields > 0) {
	foreach ($extra_fields as $extra) {
		$list[] = $extra[1];
		$list_reponse[] = 'xxx';
		$spaces = '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
		$result_xml .= $spaces.'&lt;'.$extra[1].'&gt;xxx&lt;/'.$extra[1].'&gt;';
		if ($i != $count_fields - 1) {
			$result_xml .= '<br/>';
		}
		$i++;
	}
}
?>
<p><?php echo get_lang('CSVMustLookLike').' ('.get_lang('MandatoryFields').')'; ?> :</p>

<pre>
    <b>id</b>;<b>parent_id</b>;<b>name</b>;<b>description</b>
    <b>2</b>;<b>1</b>;<b>Chamilo Expert</b>;Chamilo is an open source LMS;<br />
</pre>
<?php
Display :: display_footer();
