<?php

/**
 * User for the Participo system
 */
class User
{
	private $id;
	private $loginName;
	private $name;
	private $firstName;
	private $dateOfBirth;
	private $eMail;
	private $config;
	private $pwHash;

	/** columns in the user table (in the database) with their type
	 *
	 * @var array
	 */
	private static $dbColumns = [
		'id' => PDO::PARAM_INT,
		'loginName' => PDO::PARAM_STR,
		'name' => PDO::PARAM_STR,
		'vorname' => PDO::PARAM_STR,
		'gebDatum' => PDO::PARAM_STR,
		'eMail' => PDO::PARAM_STR,
		'pwHash' => PDO::PARAM_STR,
		'config' => PDO::PARAM_STR
	];

	/** Constructor
	 * @todo Document parameter
	 * @todo Input sanitation
	 */
	public function __construct($id, $loginName, $name, $firstName, $dateOfBirth, $eMail, $config, $pwHash)
	{
		$this->id = (int) $id;
		$this->loginName = $loginName;
		$this->name = $name;
		$this->firstName = $firstName;
		$this->dateOfBirth = $dateOfBirth != null ? DateTime::createFromFormat('Y-m-d', $dateOfBirth) : null;
		$this->eMail = $eMail;
		$this->config = $config;
		$this->pwHash = $pwHash;
	}

	/** Export the User data into an associative array
	 *
	 * @return array associative array representing the user
	 */
	public function toAssoc()
	{
		return [
			'id' => $this->id,
			'loginName' => $this->loginName,
			'name' => $this->name,
			'vorname' => $this->firstName,
			'gebDatum' => $this->dateOfBirth,
			'eMail' => $this->eMail,
			'config' => $this->config,
			'pwHash' => $this->pwHash
		];
	}

	/** verify the users password
	 *
	 * @param [string] $password the password to verify
	 * @return true if password is verified, false otherwise
	 */
	public function verifyPassword($password)
	{
		return password_verify($password, $this->pwHash);
	}

	// getter functions

	public function getId()
	{
		return $this->id;
	}

	public function getLoginName()
	{
		return $this->loginName;
	}

	public function getName()
	{
		return $this->name;
	}

	public function getFirstname()
	{
		return $this->firstName;
	}

	public function getConfig()
	{
		return $this->$config;
	}

	// static functions

	/** Create a User from an assoziative array like it is returned from db requests
	 *
	 * @param array $member associative array with the UserData from the dbRequest
	 * @param $columnMappings renaming of columnNames, e.g., if the id  isn't under id in the array, add 'id'=>'userId' to the mappings
	 * @return User initialized user
	 */
	public static function fromDbArray($member, $columnMappings = [])
	{
		// if it isn't remapped, take default column name
		foreach (self::$dbColumns as $columnName => $columnDataType) {
			if (!array_key_exists($columnName, $columnMappings)) {
				$columnMappings[$columnName] = $columnName;
			}
		}

		return new User(
			$member[$columnMappings['id']] ?? null,
			$member[$columnMappings['loginName']] ?? null,
			$member[$columnMappings['name']] ?? null,
			$member[$columnMappings['vorname']] ?? null,
			$member[$columnMappings['gebDatum']] ?? null,
			array_key_exists($columnMappings['eMail'], $member) ? explode(',', $member['eMail']) : null,
			array_key_exists($columnMappings['config'], $member) ? json_decode($member['config']) : null,
			array_key_exists($columnMappings['pwHash'], $member) ? $member['pwHash'] : null
		);
	}

	/** Load an User from the db via an id
	 *
	 * @param int $userId
	 * @return loaded user or null (if sth. wrong)
	 */
	public static function loadFromDb($userId)
	{
		return self::loadFromDbBy('id', $userId);
	}

	/** Load an User from the db via the loginName
	 *
	 * @param int $login
	 * @return loaded user or null (if sth. wrong)
	 */
	public static function loadFromDbByLoginName($login)
	{
		return self::loadFromDbBy('loginName', $login);
	}

	/** Load a user from the db by a column
	 *
	 * @param [string] $name name of the column
	 * @param [mixed] $value value to look for
	 * @param [bool] $unique if the value is unique (true->return single value) or not (false->return array)
	 * @return loaded user or null (if sth. wrong)
	 */
	public static function loadFromDbBy($name, $value)
	{
		if (!array_key_exists($name, self::$dbColumns)) {
			return null;
		}

		$response = dbConnector::query(
			'SELECT * FROM `wkParticipo_Users` WHERE `' . $name . '` = :' . $name,
			[$name => ['value' => $value, 'data_type' => self::$dbColumns[$name]]]
		);

		if (count($response) != 1) {
			return null;
		}

		return User::fromDbArray($response[0]);
	}
}