mirror of
https://github.com/wbbaddons/Tims-Chat.git
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118 lines
3.1 KiB
PHP
118 lines
3.1 KiB
PHP
<?php
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namespace wcf\util;
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/**
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* Chat utilities
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*
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* @author Tim Düsterhus
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* @copyright 2010-2011 Tim Düsterhus
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* @license Creative Commons Attribution-NonCommercial-ShareAlike <http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode>
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* @package timwolla.wcf.chat
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* @subpackage util
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*/
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class ChatUtil {
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/**
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* Matches a time-interval with modifiers.
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* Each part may be optionally separated by a comma
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*
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* @see \wcf\util\ChatUtil::timeModifier()
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*/
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const TIME_MODIFIER_REGEX = '((?:[0-9]+[h|d|w|m|y|H|D|W|M|Y]?,?)+)';
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/**
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* Creates a gradient out of two colors represented by an integer.
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* The first byte is red, the second byte is green, the third one is blue.
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* The numbers can be easily expressed in hexadecimal notation: 0xFF0000 being red.
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*
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* @param string $string
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* @param integer $start
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* @param integer $end
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* @returen string
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*/
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public static function gradient($string, $start, $end) {
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$string = self::str_split($string);
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if (count($string) === 0) return '';
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$r = (int) ((($start >> 16 & 255) - ($end >> 16 & 255)) / (count($string) - 1));
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$g = (int) ((($start >> 8 & 255) - ($end >> 8 & 255)) / (count($string) - 1));
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$b = (int) ((($start & 255) - ($end & 255)) / (count($string) - 1));
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$result = '';
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for ($i = 0, $max = count($string); $i < $max; $i++) {
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$result .= '<span style="color:rgb('.(($start >> 16 & 255) - $i * $r).','.(($start >> 8 & 255) - $i * $g).','.(($start & 255) - $i * $b).')">'.$string[$i].'</span>';
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}
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return $result;
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}
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/**
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* Splits a string into smaller chunks.
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* UTF-8 safe version of str_split().
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*
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* @param string $string
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* @param integer $length
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* @return array<string>
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*/
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public static function str_split($string, $length = 1) {
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$result = array();
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for ($i = 0, $max = StringUtil::length($string); $i < $max; $i += $length) {
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$result[] = StringUtil::substring($string, $i, $length);
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}
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return $result;
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}
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/**
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* Creates an interval out of a string with modifiers.
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* Modifiers may be mixed. Valid modifiers are: _s_econd, _h_our, _d_ay, _w_week, _m_onth, _y_ear
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* '2' -> 2 minutes
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* '2h' -> 2 hours
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* '1y12m2w3d12h' -> 1 year, 12 months, 2 weeks, 3 days, 12 hours
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*
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* @param string $time
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* @return integer
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*/
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public static function timeModifier($time) {
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preg_match_all('!([0-9]+[s|h|d|w|m|y]?)!i', $time, $matches);
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$result = 0;
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foreach ($matches[1] as $time) {
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// 60 seconds a minute
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$multiplier = 60;
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$modifier = substr($time, -1);
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switch ($modifier) {
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case 'y':
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case 'Y':
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// twelve months a year
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$multiplier *= 12;
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case 'm':
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case 'M':
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// about 4.3 weeks per month
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$multiplier *= 4.34812141;
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case 'w':
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case 'W':
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// seven days a weeks
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$multiplier *= 7;
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case 'd':
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case 'D':
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// 24 hours a day
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$multiplier *= 24;
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case 'h':
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case 'H':
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// 60 minutes an hour
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$multiplier *= 60;
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$time = substr($time, 0, -1);
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break;
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case 's':
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case 'S':
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// 60 seconds per minute
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$multiplier /= 60;
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$time = substr($time, 0, -1);
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}
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$result += $time * $multiplier;
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}
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return (int) round($result, 0);
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}
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}
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