YetiForceCompany/YetiForceCRM

<?php
/**
 * Text utils file.
 *
 * @package App
 *
 * @copyright YetiForce S.A.
 * @license   YetiForce Public License 6.5 (licenses/LicenseEN.txt or yetiforce.com)
 * @author    Mariusz Krzaczkowski <m.krzaczkowski@yetiforce.com>
 */

namespace App;

/**
 * Text utils class.
 */
class TextUtils
{
    /**
     * Get text length.
     *
     * @param string $text
     *
     * @return int
     */
    public static function getTextLength($text)
    {
        return null !== $text ? mb_strlen($text) : 0;
    }

    /**
     * Truncating text.
     *
     * @param string   $text
     * @param bool|int $length
     * @param bool     $addDots
     *
     * @return string
     */
    public static function textTruncate($text, $length = false, $addDots = true)
    {
        if (!$length) {
            $length = Config::main('listview_max_textlength');
        }
        $textLength = 0;
        if (null !== $text) {
            $textLength = mb_strlen($text);
        }
        if ((!$addDots && $textLength > $length) || ($addDots && $textLength > $length + 2)) {
            $text = mb_substr($text, 0, $length, Config::main('default_charset'));
            if ($addDots) {
                $text .= '...';
            }
        }
        return $text;
    }

    /**
     * Truncating HTML by words.
     *
     * @param string $html
     * @param int    $length
     * @param string $ending
     *
     * @return string
     */
    public static function htmlTruncateByWords(string $html, int $length = 0, string $ending = '...'): string
    {
        if (!$length) {
            $length = Config::main('listview_max_textlength');
        }
        if (\strlen(strip_tags($html)) <= $length) {
            return $html;
        }
        $totalLength = \mb_strlen($ending);
        $openTagsLength = 0;
        $openTags = [];
        preg_match_all('/(<.+?>)?([^<>]*)/s', $html, $tags, PREG_SET_ORDER);
        $html = '';
        foreach ($tags as $tag) {
            $tagLength = \mb_strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|[0-9a-f]{1,6};/i', ' ', $tag[2]));
            if (($totalLength + $tagLength + $openTagsLength) >= $length) {
                if (empty($html)) {
                    preg_match('/^<\s*([^\s>!]+).*?>$/s', $tag[1], $tagName);
                    $openTags[] = $tagName[1];
                    $html = $tag[1] . self::textTruncate($tag[2], $length - 3, false);
                }
                break;
            }
            if (!empty($tag[1])) {
                if (preg_match('/^<(\s*.+?\/\s*|\s*(img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param)(\s.+?)?)>$/is', $tag[1])) {
                    // if tag is a closing tag
                } elseif (preg_match('/^<\s*\/([^\s]+?)\s*>$/s', $tag[1], $tagName)) {
                    $pos = array_search(strtolower($tagName[1]), $openTags);
                    if (false !== $pos) {
                        unset($openTags[$pos]);
                        $openTagsLength -= \mb_strlen("</{$tagName[1]}>");
                    }
                } elseif (preg_match('/^<\s*([^\s>!]+).*?>$/s', $tag[1], $tagName)) {
                    array_unshift($openTags, strtolower($tagName[1]));
                    $openTagsLength += \mb_strlen("</{$tagName[1]}>");
                }
            }
            $html .= $tag[0];
            $totalLength += $tagLength;
        }
        $html .= $ending;
        if ($openTags) {
            $html .= '</' . implode('></', $openTags) . '>';
        }
        return $html;
    }

    /**
     * Truncating HTML.
     *
     * @param string $html
     * @param int    $length
     * @param string $ending
     *
     * @return string
     */
    public static function htmlTruncate(string $html, int $length = 255, string $ending = '...'): string
    {
        if (\strlen($html) <= $length) {
            return $html;
        }
        $totalLength = \mb_strlen($ending);
        $openTagsLength = 0;
        $openTags = [];
        preg_match_all('/(<.+?>)?([^<>]*)/s', $html, $tags, PREG_SET_ORDER);
        $html = '';
        foreach ($tags as $tag) {
            $tagLength = \mb_strlen($tag[0]);
            if (($totalLength + $tagLength + $openTagsLength) >= $length) {
                if (empty($html)) {
                    preg_match('/^<\s*([^\s>!]+).*?>$/s', $tag[1], $tagName);
                    $openTags[] = $tagName[1];
                    $html = $tag[1] . self::textTruncate($tag[2], $length - 3, false);
                }
                break;
            }
            if (!empty($tag[1])) {
                if (preg_match('/^<(\s*.+?\/\s*|\s*(img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param)(\s.+?)?)>$/is', $tag[1])) {
                    // if tag is a closing tag
                } elseif (preg_match('/^<\s*\/([^\s]+?)\s*>$/s', $tag[1], $tagName)) {
                    $pos = array_search(strtolower($tagName[1]), $openTags);
                    if (false !== $pos) {
                        unset($openTags[$pos]);
                        $openTagsLength -= \mb_strlen("</{$tagName[1]}>");
                    }
                } elseif (preg_match('/^<\s*([^\s>!]+).*?>$/s', $tag[1], $tagName)) {
                    array_unshift($openTags, strtolower($tagName[1]));
                    $openTagsLength += \mb_strlen("</{$tagName[1]}>");
                }
            }
            $html .= $tag[0];
            $totalLength += $tagLength;
        }
        $html .= $ending;
        if ($openTags) {
            $html .= '</' . implode('></', $openTags) . '>';
        }
        return $html;
    }

    /**
     * Get all attributes of a tag.
     *
     * @param string $tag
     *
     * @return string[]
     */
    public static function getTagAttributes(string $tag): array
    {
        $dom = new \DOMDocument('1.0', 'UTF-8');
        $previousValue = libxml_use_internal_errors(true);
        $dom->loadHTML('<?xml encoding="utf-8"?>' . $tag);
        libxml_clear_errors();
        libxml_use_internal_errors($previousValue);
        $tag = $dom->getElementsByTagName('*')->item(2);
        $attributes = [];
        if ($tag->hasAttributes()) {
            foreach ($tag->attributes as $attr) {
                $attributes[$attr->name] = $attr->value;
            }
        }
        return $attributes;
    }
}