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Added new meta extension for social media sites, thanks Steffen

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markseu 2019-05-07 00:30:36 +02:00
parent 73ccd536c0
commit 83157ed857
2 changed files with 87 additions and 0 deletions
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86
system/extensions/meta.php Normal file
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@ -0,0 +1,86 @@
<?php
// Meta extension, https://github.com/datenstrom/yellow-extensions/tree/master/features/meta
// Copyright (c) 2013-2019 Datenstrom, https://datenstrom.se
// This file may be used and distributed under the terms of the public license.
class YellowMeta {
const VERSION = "0.8.7";
const TYPE = "feature";
public $yellow; //access to API
// Handle initialisation
public function onLoad($yellow) {
$this->yellow = $yellow;
$this->yellow->system->setDefault("metaDefaultImage", "icon");
}
// Handle update
public function onUpdate($action) {
if ($action=="update") { //TODO: remove later, converts old settings
$path = $this->yellow->system->get("contentDir");
foreach ($this->yellow->toolbox->getDirectoryEntriesRecursive($path, "/^.*\.md$/", true, false) as $entry) {
$fileData = $fileDataNew = $this->yellow->toolbox->readFile($entry);
$fileDataNew = preg_replace("/SocialtagsImage:/i", "Image:", $fileDataNew);
$fileDataNew = preg_replace("/SocialtagsImageAlt:/i", "ImageAlt:", $fileDataNew);
if ($fileData!=$fileDataNew) {
$modified = $this->yellow->toolbox->getFileModified($entry);
if (!$this->yellow->toolbox->deleteFile($entry) ||
!$this->yellow->toolbox->createFile($entry, $fileDataNew) ||
!$this->yellow->toolbox->modifyFile($entry, $modified)) {
$this->yellow->log("error", "Can't write file '$entry'!");
}
}
}
}
}
// Handle page extra data
public function onParsePageExtra($page, $name) {
$output = null;
if ($name=="header" && !$page->isError()) {
list($imageUrl, $imageAlt) = $this->getImageInformation($page);
$output .= "<meta property=\"og:url\" content=\"".htmlspecialchars($page->getUrl().$this->yellow->toolbox->getLocationArgs())."\" />\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 = $matches[1]."<html prefix=\"og: http://ogp.me/ns#\"".$matches[2].">".$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" ? $this->yellow->system->get("imageLocation").$name :
$this->yellow->system->get("resourceLocation").$page->get("theme")."-icon.png";
$url = $this->yellow->lookup->normaliseUrl(
$this->yellow->system->get("serverScheme"),
$this->yellow->system->get("serverAddress"),
$this->yellow->system->get("serverBase"), $location);
} else {
$url = $this->yellow->lookup->normaliseUrl("", "", "", $name);
}
return array($url, $alt);
}
}

1
system/settings/system.ini
View file

@ -73,3 +73,4 @@ ImageUploadJpgQuality: 80
ImageThumbnailLocation: /media/thumbnails/
ImageThumbnailDir: media/thumbnails/
ImageThumbnailJpgQuality: 80
MetaDefaultImage: icon