<?php

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/**

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* LiteSpeed String Operator Library Class

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*

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* @since 1.3

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* @package LiteSpeed

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*/

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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/**

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* Class Str

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*

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* Provides string manipulation utilities for LiteSpeed Cache.

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*

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* @since 1.3

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*/

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class Str {

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/**

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* Translate QC HTML links from html.

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*

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* Converts `<a href="{#xxx#}">xxxx</a>` to `<a href="xxx">xxxx</a>`.

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*

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* @since 7.0

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* @access public

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* @param string $html The HTML string to process.

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* @return string The processed HTML string.

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*/

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public static function translate_qc_apis( $html ) {

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preg_match_all( '/<a href="{#(\w+)#}"/U', $html, $matches );

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if ( ! $matches ) {

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return $html;

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}

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foreach ( $matches[0] as $k => $html_to_be_replaced ) {

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$link = '<a href="' . Utility::build_url( Router::ACTION_CLOUD, Cloud::TYPE_API, false, null, [ 'action2' => $matches[1][ $k ] ] ) . '"';

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$html = str_replace( $html_to_be_replaced, $link, $html );

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}

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return $html;

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}

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/**

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* Return safe HTML

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*

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* Sanitizes HTML to allow only specific tags and attributes.

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*

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* @since 7.0

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* @access public

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* @param string $html The HTML string to sanitize.

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* @return string The sanitized HTML string.

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*/

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public static function safe_html( $html ) {

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$common_attrs = [

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'style' => [],

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'class' => [],

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'target' => [],

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'src' => [],

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'color' => [],

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'href' => [],

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];

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$tags = [ 'hr', 'h3', 'h4', 'h5', 'ul', 'li', 'br', 'strong', 'p', 'span', 'img', 'a', 'div', 'font' ];

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$allowed_tags = [];

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foreach ( $tags as $tag ) {

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$allowed_tags[ $tag ] = $common_attrs;

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}

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return wp_kses( $html, $allowed_tags );

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}

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/**

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* Generate random string

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*

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* Creates a random string of specified length and character type.

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*

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* @since 1.3

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* @access public

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* @param int $len Length of string.

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* @param int $type Character type: 1-Number, 2-LowerChar, 4-UpperChar, 7-All.

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* @return string Randomly generated string.

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*/

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public static function rrand( $len, $type = 7 ) {

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switch ( $type ) {

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case 0:

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$charlist = '012';

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break;

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case 1:

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$charlist = '0123456789';

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break;

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case 2:

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$charlist = 'abcdefghijklmnopqrstuvwxyz';

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break;

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case 3:

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$charlist = '0123456789abcdefghijklmnopqrstuvwxyz';

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break;

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case 4:

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$charlist = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

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break;

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case 5:

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$charlist = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';

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break;

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case 6:

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$charlist = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

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break;

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case 7:

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$charlist = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

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break;

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}

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$str = '';

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$max = strlen( $charlist ) - 1;

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for ( $i = 0; $i < $len; $i++ ) {

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$str .= $charlist[ random_int( 0, $max ) ];

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}

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return $str;

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}

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/**

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* Trim double quotes from a string

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*

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* Removes double quotes from a string for use as a preformatted src in HTML.

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*

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* @since 6.5.3

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* @access public

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* @param string $text The string to process.

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* @return string The string with double quotes removed.

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*/

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public static function trim_quotes( $text ) {

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return str_replace( '"', '', $text );

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}

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}

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