From 3821ca9737eeafe6ef69ab57d980c233e6b2a00c Mon Sep 17 00:00:00 2001
From: boyska <piuttosto@logorroici.org>
Date: Mon, 10 Sep 2018 23:57:43 +0200
Subject: [PATCH] [Facebook] make guids really permanent

Some facebook tracking query parameter was getting inside the <link>
and <guid> tags. This commit strips them off so that a feed reader
won't think there are always new posts.
---
 bridges/FacebookBridge.php | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/bridges/FacebookBridge.php b/bridges/FacebookBridge.php
index c8ea0d7..8835020 100644
--- a/bridges/FacebookBridge.php
+++ b/bridges/FacebookBridge.php
@@ -165,6 +165,14 @@ class FacebookBridge extends BridgeAbstract {
 		return htmlspecialchars_decode($ogtitle->content, ENT_QUOTES);
 
 	}
+    private function uri_strip_args($uri) {
+        $clean = strtok($uri, '?');
+        if($clean === FALSE) {
+            return $uri;
+        } else {
+            return $clean;
+        }
+    }
 
 	private function extractGroupURI($post) {
 
@@ -175,7 +183,7 @@ class FacebookBridge extends BridgeAbstract {
 
 			// Find the one that is a permalink
 			if(strpos($anchor->href, 'permalink') !== false) {
-				return $anchor->href;
+				return $this->uri_strip_args($anchor->href);
 			}
 
 		}
@@ -539,7 +547,7 @@ EOD;
 						$uri = self::URI . $post->find('abbr')[0]->parent()->getAttribute('href');
 
 						//Build and add final item
-						$item['uri'] = htmlspecialchars_decode($uri);
+						$item['uri'] = $this->uri_strip_args(htmlspecialchars_decode($uri));
 						$item['content'] = htmlspecialchars_decode($content);
 						$item['title'] = $title;
 						$item['author'] = $author;