commit 83157ed857477746e3b896270c5db15f9a1f0c4b
parent 73ccd536c0362b1cb5b45bd2f6561929bd0891da
Author: markseu <mark2011@mayberg.se>
Date: Tue, 7 May 2019 00:30:36 +0200
Added new meta extension for social media sites, thanks Steffen
Diffstat:
2 files changed, 87 insertions(+), 0 deletions(-)
diff --git a/system/extensions/meta.php b/system/extensions/meta.php
@@ -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);
+ }
+}
diff --git a/system/settings/system.ini b/system/settings/system.ini
@@ -73,3 +73,4 @@ ImageUploadJpgQuality: 80
ImageThumbnailLocation: /media/thumbnails/
ImageThumbnailDir: media/thumbnails/
ImageThumbnailJpgQuality: 80
+MetaDefaultImage: icon
