From 79c3d80a2a4b78f3dad460963dc765a3491a96de Mon Sep 17 00:00:00 2001
From: Marcel Werk <burntime@woltlab.com>
Date: Tue, 28 Feb 2017 16:12:20 +0100
Subject: [PATCH] Added global option to supply default og:image

Closes #2228
---
 com.woltlab.wcf/option.xml                                 | 4 ++++
 constants.php                                              | 1 +
 wcfsetup/install/files/lib/system/MetaTagHandler.class.php | 3 +++
 wcfsetup/install/lang/de.xml                               | 2 ++
 wcfsetup/install/lang/en.xml                               | 2 ++
 5 files changed, 12 insertions(+)

diff --git a/com.woltlab.wcf/option.xml b/com.woltlab.wcf/option.xml
index 00697fca13..bec5b11371 100644
--- a/com.woltlab.wcf/option.xml
+++ b/com.woltlab.wcf/option.xml
@@ -433,6 +433,10 @@
 				<optiontype>textI18n</optiontype>
 				<supporti18n>1</supporti18n>
 			</option>
+			<option name="og_image">
+				<categoryname>general.page</categoryname>
+				<optiontype>text</optiontype>
+			</option>
 			<option name="show_version_number">
 				<categoryname>general.page</categoryname>
 				<optiontype>boolean</optiontype>
diff --git a/constants.php b/constants.php
index 7c6b7ae8a3..3c17445013 100644
--- a/constants.php
+++ b/constants.php
@@ -216,3 +216,4 @@ define('LANGUAGE_USE_INFORMAL_VARIANT', 0);
 define('SHOW_STYLE_CHANGER', 0);
 define('ARTICLE_SORT_ORDER', 'DESC');
 define('USE_PAGE_TITLE_ON_LANDING_PAGE', 1);
+define('OG_IMAGE', '');
diff --git a/wcfsetup/install/files/lib/system/MetaTagHandler.class.php b/wcfsetup/install/files/lib/system/MetaTagHandler.class.php
index 41e4d93b4f..539ab47708 100644
--- a/wcfsetup/install/files/lib/system/MetaTagHandler.class.php
+++ b/wcfsetup/install/files/lib/system/MetaTagHandler.class.php
@@ -43,6 +43,9 @@ class MetaTagHandler extends SingletonFactory implements \Countable, \Iterator {
 		if ($value = WCF::getLanguage()->get(PAGE_TITLE)) {
 			$this->addTag('og:site_name', 'og:site_name', $value, true);
 		}
+		if (OG_IMAGE) {
+			$this->addTag('og:image', 'og:image', (preg_match('~^https?://~', OG_IMAGE) ? OG_IMAGE : WCF::getPath() . OG_IMAGE), true);
+		}
 	}
 	
 	/**
diff --git a/wcfsetup/install/lang/de.xml b/wcfsetup/install/lang/de.xml
index 804a54c44a..7a9175a113 100644
--- a/wcfsetup/install/lang/de.xml
+++ b/wcfsetup/install/lang/de.xml
@@ -941,6 +941,8 @@
 		<item name="wcf.acp.option.mail_use_f_param.description"><![CDATA[Der „-f“-Parameter sorgt bei der PHP-Versandmethode dafür, dass der korrekte Absender gesetzt wird. Diese Einstellung wird möglicherweise nicht von jedem Server unterstützt. {if LANGUAGE_USE_INFORMAL_VARIANT}Versuche{else}Versuchen Sie{/if} in diesem Falle die Option zu deaktivieren.]]></item>
 		<item name="wcf.acp.option.meta_description"><![CDATA[Meta Description]]></item>
 		<item name="wcf.acp.option.meta_keywords"><![CDATA[Meta Keywords]]></item>
+		<item name="wcf.acp.option.og_image"><![CDATA[Standardwert „Open Graph“-Bild]]></item>
+		<item name="wcf.acp.option.og_image.description"><![CDATA[Pfad zur Bilddatei, die beim Verlinken von Inhalten auf Facebook, Twitter und anderen „Social Media“-Seiten standardmäßig eingebunden wird.]]></item>
 		<item name="wcf.acp.option.module_master_password"><![CDATA[Hauptkennwort aktivieren]]></item>
 		<item name="wcf.acp.option.module_master_password.description"><![CDATA[Aktiviert die zusätzliche Eingabe eines Kennworts beim Aufruf von sicherheitskritischen Bereichen.]]></item>
 		<item name="wcf.acp.option.page_description"><![CDATA[Seitenbeschreibung]]></item>
diff --git a/wcfsetup/install/lang/en.xml b/wcfsetup/install/lang/en.xml
index e43b7dc502..e5062800cd 100644
--- a/wcfsetup/install/lang/en.xml
+++ b/wcfsetup/install/lang/en.xml
@@ -937,6 +937,8 @@ Examples for medium ID detection:
 		<item name="wcf.acp.option.mail_use_f_param.description"><![CDATA[The “-f” parameter sets the proper sender of the email if the PHP send method is used. This parameter may not be supported by every server. Try disabling it, if you have trouble sending emails.]]></item>
 		<item name="wcf.acp.option.meta_description"><![CDATA[Meta Description]]></item>
 		<item name="wcf.acp.option.meta_keywords"><![CDATA[Meta Keywords]]></item>
+		<item name="wcf.acp.option.og_image"><![CDATA[Open Graph Image]]></item>
+		<item name="wcf.acp.option.og_image.description"><![CDATA[Path to the default image that will be displayed when sharing your site on Facebook, Twitter and other social media sites.]]></item>
 		<item name="wcf.acp.option.module_master_password"><![CDATA[Enable master password]]></item>
 		<item name="wcf.acp.option.module_master_password.description"><![CDATA[Enables an additional password to protect both critical actions and sensitive data.]]></item>
 		<item name="wcf.acp.option.page_description"><![CDATA[Page Description]]></item>
-- 
2.20.1