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scossar 2018-05-29 13:54:18 -07:00
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templates/template-functions.php
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@ -1,182 +0,0 @@
<?php
/**
* Tempate utility functions.
*
* @package WPDiscourse
*/

namespace WPDiscourse\Templates;

/**
* Class TemplateFunctions
*/
class TemplateFunctions {

/**
* Returns the user's Discourse homepage.
*
* @param string $url The base URL of the Discourse forum.
* @param object $post The Post object.
*
* @return string
*/
public static function homepage( $url, $post ) {
return $url . '/users/' . strtolower( $post->username );
}

/**
* Substitutes the value for `$size` into the template.
*
* @param string $template The avatar template.
* @param int $size The size of the avarar.
*
* @return mixed
*/
public static function avatar( $template, $size ) {
return str_replace( '{size}', $size, $template );
}

/**
* Replaces relative image src with absolute.
*
* This function may not be required anymore.
* See: https://meta.discourse.org/t/can-emoji-be-rendered-with-absolute-urls/47250
*
* @param string $url The base url of the forum.
* @param string $content The content to be checked.
*
* @return mixed
*/
public static function convert_relative_img_src_to_absolute( $url, $content ) {
if ( preg_match( "/<img\s*src\s*=\s*[\'\"]?(https?:)?\/\//i", $content ) ) {
return $content;
}

$search = '#<img src="((?!\s*[\'"]?(?:https?:)?\/\/)\s*([\'"]))?#';
$replace = "<img src=\"{$url}$1";

return preg_replace( $search, $replace, $content );
}

/**
* Converts relative URLs retured from Discourse to absolute URLs with DOMDocument.
*
* Checks if libxml is loaded. If not, calls convert_relative_img_src_to_absolute.
*
* @param string $url The Discourse URL.
* @param string $content The content to be parsed.
*
* @return mixed|string
*/
public static function convert_relative_urls_to_absolute( $url, $content ) {
if ( ! extension_loaded( 'libxml' ) ) {

return self::convert_relative_img_src_to_absolute( $url, $content );
}

// Allows parsing misformed html. Save the previous value of libxml_use_internal_errors so that it can be restored.
$use_internal_errors = libxml_use_internal_errors( true );

$doc = new \DOMDocument( '1.0', 'utf-8' );
$doc->loadHTML( mb_convert_encoding( $content, 'HTML-ENTITIES', 'UTF-8' ) );

// Mentions and hashtags.
$links = $doc->getElementsByTagName( 'a' );
foreach ( $links as $link ) {
$href = $link->getAttribute( 'href' );
$url_parts = wp_parse_url( $href );

if ( empty( $url_parts['host'] ) ) {
$link->setAttribute( 'href', $url . $href );
}
}

// Images, emojis etc.
$images = $doc->getElementsByTagName( 'img' );
foreach ( $images as $image ) {
$src = $image->getAttribute( 'src' );
$url_parts = wp_parse_url( $src );

if ( empty( $url_parts['host'] ) ) {
$image->setAttribute( 'src', $url . $src );
}
}

// Clear the libxml error buffer.
libxml_clear_errors();
// Restore the previous value of libxml_use_internal_errors.
libxml_use_internal_errors( $use_internal_errors );

$parsed = $doc->saveHTML( $doc->documentElement );

// Remove DOCTYPE, html, and body tags that have been added to the DOMDocument.
$parsed = preg_replace( '~<(?:!DOCTYPE|/?(?:html|body))[^>]*>\s*~i', '', $parsed );

return $parsed;
}

/**
* Format the Discourse created_at date based on the WordPress site's timezone.
*
* @param string $string The datetime string returned from Discourse.
* @param string $format The datetime format.
*
* @return false|string
*/
public static function format_date( $string, $format ) {
$tz = get_option( 'timezone_string' );
$gmt_offset = get_option( 'gmt_offset' );
$localtime = '';
if ( $tz ) {
$datetime = date_create( $string, new \DateTimeZone( 'UTC' ) );
$datetime->setTimezone( new \DateTimeZone( $tz ) );
$localtime = $datetime->format( $format );
} elseif ( $gmt_offset ) {
$timestamp = strtotime( $string ) + ( get_option( 'gmt_offset' ) * HOUR_IN_SECONDS );
$localtime = gmdate( $format, $timestamp );
}

return $localtime;
}

// Todo: complete this!
public static function add_poll_links( $cooked, $url ) {
// Allows parsing misformed html. Save the previous value of libxml_use_internal_errors so that it can be restored.
$use_internal_errors = libxml_use_internal_errors( true );

$doc = new \DOMDocument( '1.0', 'utf-8' );
$doc->loadHTML( mb_convert_encoding( $cooked, 'HTML-ENTITIES', 'UTF-8' ) );

$finder = new \DOMXPath( $doc );
$polls = $finder->query( "//*[contains(@class, 'poll')]" );
if ( $polls->length) {

foreach ($polls as $poll) {
//$status = $poll->getAttribute( 'data-poll-status');
//write_log('poll status', $status );
//$text = 'open' === $status ? 'vote' : 'view';
$link = $doc->createElement( 'a' );
$link->setAttribute( 'class', 'wpdc-poll-link' );
$link->setAttribute( 'href', $url );
$link_text = $doc->createTextNode( 'View Poll' );
$link->appendChild( $link_text );

$poll->parentNode->replaceChild( $link, $poll );
}

$parsed = $doc->saveHTML( $doc->documentElement );

// Remove DOCTYPE, html, and body tags that have been added to the DOMDocument.
$parsed = preg_replace( '~<(?:!DOCTYPE|/?(?:html|body))[^>]*>\s*~i', '', $parsed );

return $parsed;
}

// Clear the libxml error buffer.
libxml_clear_errors();
// Restore the previous value of libxml_use_internal_errors.
libxml_use_internal_errors( $use_internal_errors );

return $cooked;
}
}