<?php
/**
 * Validates imported data.
 */
function validate_data($users) {
	global $defined_auth_sources;
	$errors = array ();
	$usernames = array ();
	if(is_array($users)) {
		foreach ($users as $index => $user) {
			// 1. Check whether mandatory fields have been set.
			$mandatory_fields = array ('LastName', 'FirstName');
			if (api_get_setting('registration', 'email') == 'true') {
				$mandatory_fields[] = 'Email';
			}
			foreach ($mandatory_fields as $key => $field) {
				if (!isset ($user[$field]) || strlen($user[$field]) == 0) {
					$user['error'] = get_lang($field.'Mandatory');
					$errors[] = $user;
				}
			}
			// 2. Check username.
			if (!UserManager::is_username_empty($username)) {
				// 2.1. Check whether username was used twice in the import file.
				if (isset($usernames[$user['UserName']])) {
					$user['error'] = get_lang('UserNameUsedTwice');
					$errors[] = $user;
				}
				$usernames[$user['UserName']] = 1;
				// 2.2. Check whether username is allready in use in database.
				if (!UserManager::is_username_available($user['UserName'])) {
					$user['error'] = get_lang('UserNameNotAvailable');
					$errors[] = $user;
				}
				// 2.3. Check whether username is too long.
				if (UserManager::is_username_too_long($user['UserName'])) {
					$user['error'] = get_lang('UserNameTooLong');
					$errors[] = $user;
				}
			}
			// 3. Check status.
			if (isset ($user['Status']) && !api_status_exists($user['Status'])) {
				$user['error'] = get_lang('WrongStatus');
				$errors[] = $user;
			}
			// 4. Check classname.
			if (isset ($user['ClassName']) && strlen($user['ClassName']) != 0) {
				if (!ClassManager :: class_name_exists($user['ClassName'])) {
					$user['error'] = get_lang('ClassNameNotAvailable');
					$errors[] = $user;
				}
			}
			// 5. Check authentication source.
			if (isset ($user['AuthSource']) && strlen($user['AuthSource']) != 0) {
				if (!in_array($user['AuthSource'], $defined_auth_sources)) {
					$user['error'] = get_lang('AuthSourceNotAvailable');
					$errors[] = $user;
				}
			}
		}
	}
	return $errors;
}

/**
 * Adds missing user-information (which isn't required, like password, username, etc).
 */
function complete_missing_data($user) {
	// 1. Create a username if necessary.
	if (UserManager::is_username_empty($user['UserName'])) {
		$user['UserName'] = UserManager::create_unique_username($user['FirstName'], $user['LastName']);
	}
	// 2. Generate a password if necessary.
	if (!isset ($user['Password']) || strlen($user['Password']) == 0) {
		$user['Password'] = api_generate_password();
	}
	// 3. set status if not allready set.
	if (!isset ($user['Status']) || strlen($user['Status']) == 0) {
		$user['Status'] = 'user';
	}
	// 4. Set authsource if not allready set.
	if (!isset ($user['AuthSource']) || strlen($user['AuthSource']) == 0) {
		$user['AuthSource'] = PLATFORM_AUTH_SOURCE;
	}
	return $user;
}

/**
 * Save the imported data
 */
function save_data($users) {
	$user_table = Database :: get_main_table(TABLE_MAIN_USER);
	if(is_array($users)) {
		foreach ($users as $index => $user) {
			$user = complete_missing_data($user);
	
			$user['Status'] = api_status_key($user['Status']);
	
			$user_id = UserManager :: create_user($user['FirstName'], $user['LastName'], $user['Status'], $user['Email'], $user['UserName'], $user['Password'], $user['OfficialCode'], api_get_setting('PlatformLanguage'), $user['PhoneNumber'], '', $user['AuthSource']);
			foreach ($user['Courses'] as $index => $course) {
				if(CourseManager :: course_exists($course))
					CourseManager :: subscribe_user($user_id, $course,$user['Status']);
			}
			if (strlen($user['ClassName']) > 0) {
				$class_id = ClassManager :: get_class_id($user['ClassName']);
				ClassManager :: add_user($user_id, $class_id);
			}
	
			// TODO: Hard-coded French texts.
	
			// Qualite
			if (!empty($user['Qualite'])) {
				UserManager::update_extra_field_value($user_id, 'qualite', $user['Qualite']);
			}
	
			// Categorie
			if (!empty($user['Categorie'])) {
				UserManager::update_extra_field_value($user_id, 'categorie', $user['Categorie']);
			}
	
			// Etat
			if (!empty($user['Etat'])) {
				UserManager::update_extra_field_value($user_id, 'etat', $user['Etat']);
			}
	
			// Niveau
			if (!empty($user['Niveau'])) {
				UserManager::update_extra_field_value($user_id, 'niveau', $user['Niveau']);
			}
		}
	}
}

/**
 * Reads the CSV-file.
 * @param string $file Path to the CSV-file
 * @return array All userinformation read from the file
 */
function parse_csv_data($file) {
	$users = Import :: csv_to_array($file);
	foreach ($users as $index => $user) {
		if (isset ($user['Courses'])) {
			$user['Courses'] = explode('|', trim($user['Courses']));
		}
		$users[$index] = $user;
	}
	return $users;
}