<?php
/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/zf2 for the canonical source repository
 * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Zend\Stdlib\StringWrapper;

interface StringWrapperInterface
{
    /**
     * Check if the given character encoding is supported by this wrapper
     * and the character encoding to convert to is also supported.
     *
     * @param string      $encoding
     * @param string|null $convertEncoding
     */
    public static function isSupported($encoding, $convertEncoding = null);

    /**
     * Get a list of supported character encodings
     *
     * @return string[]
     */
    public static function getSupportedEncodings();

    /**
     * Set character encoding working with and convert to
     *
     * @param string      $encoding         The character encoding to work with
     * @param string|null $convertEncoding  The character encoding to convert to
     * @return StringWrapperInterface
     */
    public function setEncoding($encoding, $convertEncoding = null);

    /**
     * Get the defined character encoding to work with (upper case)
     *
     * @return string
     */
    public function getEncoding();

    /**
     * Get the defined character encoding to convert to (upper case)
     *
     * @return string|null
     */
    public function getConvertEncoding();

    /**
     * Returns the length of the given string
     *
     * @param string $str
     * @return int|false
     */
    public function strlen($str);

    /**
     * Returns the portion of string specified by the start and length parameters
     *
     * @param string   $str
     * @param int      $offset
     * @param int|null $length
     * @return string|false
     */
    public function substr($str, $offset = 0, $length = null);

    /**
     * Find the position of the first occurrence of a substring in a string
     *
     * @param string $haystack
     * @param string $needle
     * @param int    $offset
     * @return int|false
     */
    public function strpos($haystack, $needle, $offset = 0);

    /**
     * Convert a string from defined encoding to the defined convert encoding
     *
     * @param string  $str
     * @param boolean $reverse
     * @return string|false
     */
    public function convert($str, $reverse = false);

    /**
     * Wraps a string to a given number of characters
     *
     * @param  string  $str
     * @param  integer $width
     * @param  string  $break
     * @param  boolean $cut
     * @return string
     */
    public function wordWrap($str, $width = 75, $break = "\n", $cut = false);

    /**
     * Pad a string to a certain length with another string
     *
     * @param  string  $input
     * @param  integer $padLength
     * @param  string  $padString
     * @param  integer $padType
     * @return string
     */
    public function strPad($input, $padLength, $padString = ' ', $padType = STR_PAD_RIGHT);
}
