Do not try to retrieve thumbnails for internal link

Also adds a helper function to determine if a link is a note and apply it across multiple files.

4 files changed, 17 insertions, 4 deletions

diff --git a/application/api/ApiUtils.php b/application/api/ApiUtils.php
index 1824b5d0..1e3ac02e 100644
--- a/application/api/ApiUtils.php
+++ b/application/api/ApiUtils.php
@@ -59,7 +59,7 @@ class ApiUtils
     {
         $out['id'] = $link['id'];
         // Not an internal link
-        if ($link['url'][0] != '?') {
+        if (! is_note($link['url'])) {
             $out['url'] = $link['url'];
         } else {
             $out['url'] = $indexUrl . $link['url'];
diff --git a/application/bookmark/LinkUtils.php b/application/bookmark/LinkUtils.php
index de5b61cb..9e9d4f0a 100644
--- a/application/bookmark/LinkUtils.php
+++ b/application/bookmark/LinkUtils.php
@@ -220,3 +220,16 @@ function link_small_hash($date, $id)
 {
     return smallHash($date->format(LinkDB::LINK_DATE_FORMAT) . $id);
 }
+
+/**
+ * Returns whether or not the link is an internal note.
+ * Its URL starts by `?` because it's actually a permalink.
+ *
+ * @param string $linkUrl
+ *
+ * @return bool true if internal note, false otherwise.
+ */
+function is_note($linkUrl)
+{
+    return isset($linkUrl[0]) && $linkUrl[0] === '?';
+}
diff --git a/application/feed/FeedBuilder.php b/application/feed/FeedBuilder.php
index b66f2f91..fec0452b 100644
--- a/application/feed/FeedBuilder.php
+++ b/application/feed/FeedBuilder.php
@@ -147,8 +147,8 @@ class FeedBuilder
     protected function buildItem($link, $pageaddr)
     {
         $link['guid'] = $pageaddr . '?' . $link['shorturl'];
-        // Check for both signs of a note: starting with ? and 7 chars long.
-        if ($link['url'][0] === '?' && strlen($link['url']) === 7) {
+        // Prepend the root URL for notes
+        if (is_note($link['url'])) {
             $link['url'] = $pageaddr . $link['url'];
         }
         if ($this->usePermalinks === true) {
diff --git a/application/netscape/NetscapeBookmarkUtils.php b/application/netscape/NetscapeBookmarkUtils.php
index 2fb1a4a6..28665941 100644
--- a/application/netscape/NetscapeBookmarkUtils.php
+++ b/application/netscape/NetscapeBookmarkUtils.php
@@ -54,7 +54,7 @@ class NetscapeBookmarkUtils
             $link['timestamp'] = $date->getTimestamp();
             $link['taglist'] = str_replace(' ', ',', $link['tags']);
 
-            if (startsWith($link['url'], '?') && $prependNoteUrl) {
+            if (is_note($link['url']) && $prependNoteUrl) {
                 $link['url'] = $indexUrl . $link['url'];
             }