From 8c748f03f91dcc59ba33974287fa0653d37c8788 Mon Sep 17 00:00:00 2001
From: Michael <heluecht@pirati.ca>
Date: Sat, 6 Mar 2021 08:43:25 +0000
Subject: [PATCH] Issue 9912: Process Markdown content from Peertube

---
 src/Model/Item.php                     |  4 +++
 src/Protocol/ActivityPub/Processor.php | 41 +++++++++++++++++++++++---
 src/Protocol/ActivityPub/Receiver.php  | 24 +++++++++++++++
 3 files changed, 65 insertions(+), 4 deletions(-)

diff --git a/src/Model/Item.php b/src/Model/Item.php
index 299736d14d..7c859ed221 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -1503,6 +1503,10 @@ class Item
 	 */
 	private static function getLanguage(array $item)
 	{
+		if (!empty($item['language'])) {
+			return $item['language'];
+		}
+
 		if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
 			return '';
 		}
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 069239c044..82eb4d0294 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -24,6 +24,7 @@ namespace Friendica\Protocol\ActivityPub;
 use Friendica\Content\PageInfo;
 use Friendica\Content\Text\BBCode;
 use Friendica\Content\Text\HTML;
+use Friendica\Content\Text\Markdown;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\Database\DBA;
@@ -65,6 +66,26 @@ class Processor
 		return $body;
 	}
 
+	/**
+	 * Convert the language array into a language JSON
+	 *
+	 * @param array $languages
+	 * @return string language JSON
+	 */
+	private static function processLanguages(array $languages)
+	{
+		$codes = array_keys($languages);
+		$lang = [];
+		foreach ($codes as $code) {
+			$lang[$code] = 1;
+		}
+
+		if (empty($lang)) {
+			return '';
+		}
+
+		return json_encode($lang);
+	}
 	/**
 	 * Replaces emojis in the body
 	 *
@@ -193,13 +214,13 @@ class Processor
 							continue 2;
 						}
 
-						$item['body'] .= "\n[audio]" . $attach['url'] . '[/audio]';
+						$item['body'] = '[audio]' . $attach['url'] . "[/audio]\n" . $item['body'];
 					} elseif ($filetype == 'video') {
 						if (!empty($activity['source']) && strpos($activity['source'], $attach['url'])) {
 							continue 2;
 						}
 
-						$item['body'] .= "\n[video]" . $attach['url'] . '[/video]';
+						$item['body'] = '[video]' . $attach['url'] . "[/video]\n" . $item['body'];
 					}
 			}
 		}
@@ -463,9 +484,21 @@ class Processor
 	 */
 	private static function processContent($activity, $item)
 	{
-		$item['title'] = HTML::toBBCode($activity['name']);
+		if (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/markdown')) {
+			$item['title'] = Markdown::toBBCode($activity['name']);
+			$content = Markdown::toBBCode($activity['content']);
+		} elseif (!empty($activity['mediatype']) && ($activity['mediatype'] == 'text/bbcode')) {
+			$item['title'] = $activity['name'];
+			$content = $activity['content'];
+		} else {
+			// By default assume "text/html"
+			$item['title'] = HTML::toBBCode($activity['name']);
+			$content = HTML::toBBCode($activity['content']);
+		}
 
-		$content = HTML::toBBCode($activity['content']);
+		if (!empty($activity['languages'])) {
+			$item['language'] = self::processLanguages($activity['languages']);
+		}
 
 		if (!empty($activity['emojis'])) {
 			$content = self::replaceEmojis($content, $activity['emojis']);
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index eef82f1533..519d91a660 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -982,6 +982,28 @@ class Receiver
 		return false;
 	}
 
+	/**
+	 * Converts the language element (Used by Peertube)
+	 *
+	 * @param array $languages
+	 * @return array Languages
+	 */
+	public static function processLanguages(array $languages)
+	{
+		if (empty($languages)) {
+			return [];
+		}
+
+		$language_list = [];
+
+		foreach ($languages as $language) {
+			if (!empty($language['_:identifier']) && !empty($language['as:name'])) {
+				$language_list[$language['_:identifier']] = $language['as:name'];
+			}
+		}
+		return $language_list;
+	}
+
 	/**
 	 * Convert tags from JSON-LD format into a simplified format
 	 *
@@ -1345,6 +1367,7 @@ class Receiver
 		$object_data['name'] = JsonLD::fetchElement($object, 'as:name', '@value');
 		$object_data['summary'] = JsonLD::fetchElement($object, 'as:summary', '@value');
 		$object_data['content'] = JsonLD::fetchElement($object, 'as:content', '@value');
+		$object_data['mediatype'] = JsonLD::fetchElement($object, 'as:mediaType', '@value');
 		$object_data = self::getSource($object, $object_data);
 		$object_data['start-time'] = JsonLD::fetchElement($object, 'as:startTime', '@value');
 		$object_data['end-time'] = JsonLD::fetchElement($object, 'as:endTime', '@value');
@@ -1356,6 +1379,7 @@ class Receiver
 		$object_data['attachments'] = self::processAttachments(JsonLD::fetchElementArray($object, 'as:attachment') ?? []);
 		$object_data['tags'] = self::processTags(JsonLD::fetchElementArray($object, 'as:tag') ?? []);
 		$object_data['emojis'] = self::processEmojis(JsonLD::fetchElementArray($object, 'as:tag', null, '@type', 'toot:Emoji') ?? []);
+		$object_data['languages'] = self::processLanguages(JsonLD::fetchElementArray($object, 'sc:inLanguage') ?? []);
 		$object_data['generator'] = JsonLD::fetchElement($object, 'as:generator', 'as:name', '@type', 'as:Application');
 		$object_data['generator'] = JsonLD::fetchElement($object_data, 'generator', '@value');
 		$object_data['alternate-url'] = JsonLD::fetchElement($object, 'as:url', '@id');