automatically generate link previews for new incoming notes after some delay

2 files changed, 32 insertions, 3 deletions

diff --git a/Digitigrade/Job/GenerateLinkPreviews.php b/Digitigrade/Job/GenerateLinkPreviews.php
new file mode 100644
index 0000000..acaccbb
--- /dev/null
+++ b/Digitigrade/Job/GenerateLinkPreviews.php
@@ -0,0 +1,28 @@
+<?php
+namespace Digitigrade\Job;
+
+use Digitigrade\Job;
+use Digitigrade\JobQueue;
+use Digitigrade\Logger;
+use Digitigrade\Model\Note;
+
+class GenerateLinkPreviews extends Job {
+    public int $noteId;
+
+    public function __construct(Note $note) {
+        $this->noteId = $note->id;
+        $this->remainingTries = 4;
+    }
+
+    public function run() {
+        $note = Note::find($this->noteId);
+        Logger::getInstance()->info('Generating link previews for note: ' . $note->uri);
+        $note->generateLinkPreviews();
+        $note->save();
+    }
+
+    public function submit() {
+        // submit it after a random delay to avoid deluging the websites being previewed
+        JobQueue::getInstance()->submitDelayed($this, random_int(0, 60 * 15 /* 15 minutes */));
+    }
+}
\ No newline at end of file
diff --git a/Digitigrade/Job/ProcessIncomingPush.php b/Digitigrade/Job/ProcessIncomingPush.php
index 384949b..55f4fc0 100644
--- a/Digitigrade/Job/ProcessIncomingPush.php
+++ b/Digitigrade/Job/ProcessIncomingPush.php
@@ -37,9 +37,10 @@ class ProcessIncomingPush extends Job {
                 $log->info('importing note with uri ' . $this->object->self);
                 $alreadyExisted = Note::countWhere('uri = ?', [$this->object->self]) > 0;
                 $note = Note::importFromReceivedObject($this->object);
-                if (!$alreadyExisted) {
-                    $note?->processTimelineAdditions();
-                    $note?->processNotifications();
+                if (!$alreadyExisted && isset($note)) {
+                    $note->processTimelineAdditions();
+                    $note->processNotifications();
+                    (new GenerateLinkPreviews($note))->submit();
                 }
                 break;
             case 'interaction':