69 lines
3.4 KiB
PHP
69 lines
3.4 KiB
PHP
<?php
|
|
// Meta extension, https://github.com/datenstrom/yellow-extensions/tree/master/features/meta
|
|
// Copyright (c) 2013-2020 Datenstrom, https://datenstrom.se
|
|
// This file may be used and distributed under the terms of the public license.
|
|
|
|
class YellowMeta {
|
|
const VERSION = "0.8.11";
|
|
const TYPE = "feature";
|
|
public $yellow; //access to API
|
|
|
|
// Handle initialisation
|
|
public function onLoad($yellow) {
|
|
$this->yellow = $yellow;
|
|
$this->yellow->system->setDefault("metaDefaultImage", "icon");
|
|
}
|
|
|
|
// Handle page extra data
|
|
public function onParsePageExtra($page, $name) {
|
|
$output = null;
|
|
if ($name=="header" && !$page->isError()) {
|
|
list($imageUrl, $imageAlt) = $this->getImageInformation($page);
|
|
$locale = $this->yellow->text->getText("languageLocale", $page->get("language"));
|
|
$output .= "<meta property=\"og:url\" content=\"".htmlspecialchars($page->getUrl().$this->yellow->toolbox->getLocationArgs())."\" />\n";
|
|
$output .= "<meta property=\"og:locale\" content=\"".htmlspecialchars($locale)."\" />\n";
|
|
$output .= "<meta property=\"og:type\" content=\"website\" />\n";
|
|
$output .= "<meta property=\"og:title\" content=\"".$page->getHtml("title")."\" />\n";
|
|
$output .= "<meta property=\"og:site_name\" content=\"".$page->getHtml("sitename")."\" />\n";
|
|
$output .= "<meta property=\"og:description\" content=\"".$page->getHtml("description")."\" />\n";
|
|
$output .= "<meta property=\"og:image\" content=\"".htmlspecialchars($imageUrl)."\" />\n";
|
|
$output .= "<meta property=\"og:image:alt\" content=\"".htmlspecialchars($imageAlt)."\" />\n";
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
// Handle page output data
|
|
public function onParsePageOutput($page, $text) {
|
|
$output = null;
|
|
if ($text && preg_match("/^(.*?)<html(.*?)>(.*)$/s", $text, $matches)) {
|
|
$output = $matches[1]."<html".$matches[2]." prefix=\"og: http://ogp.me/ns#\">".$matches[3];
|
|
}
|
|
return $output;
|
|
}
|
|
|
|
// Return image information for page
|
|
public function getImageInformation($page) {
|
|
if ($page->isExisting("image")) {
|
|
$name = $page->get("image");
|
|
$alt = $page->isExisting("imageAlt") ? $page->get("imageAlt") : $page->get("title");
|
|
} elseif (preg_match("/\[image(\s.*?)\]/", $page->getContent(true), $matches)) {
|
|
list($name, $alt) = $this->yellow->toolbox->getTextArgs(trim($matches[1]));
|
|
if (empty($alt)) $alt = $page->get("title");
|
|
} else {
|
|
$name = $this->yellow->system->get("metaDefaultImage");
|
|
$alt = $page->isExisting("imageAlt") ? $page->get("imageAlt") : $page->get("title");
|
|
}
|
|
if (!preg_match("/^\w+:/", $name)) {
|
|
$location = $name!="icon" ? $this->yellow->system->get("coreImageLocation").$name :
|
|
$this->yellow->system->get("coreResourceLocation").$page->get("theme")."-icon.png";
|
|
$url = $this->yellow->lookup->normaliseUrl(
|
|
$this->yellow->system->get("coreServerScheme"),
|
|
$this->yellow->system->get("coreServerAddress"),
|
|
$this->yellow->system->get("coreServerBase"), $location);
|
|
} else {
|
|
$url = $this->yellow->lookup->normaliseUrl("", "", "", $name);
|
|
}
|
|
return array($url, $alt);
|
|
}
|
|
}
|