only collect new toots if file too old

themes/hugo-mastodon-comments/static/comments/config.sample.php

@@ -3,5 +3,6 @@ $config = [
     'mastodon-instance' => 'https://mastodon.social',
     'user-id' => 379833,
     'search-url' => 'https?://fsfe.org', // please use https?:// as schema
-    'threshold' => 300
+    'cache_toots' => 300,
+    'debug' => true
 ];

themes/hugo-mastodon-comments/static/comments/getcomments.php

@@ -7,10 +7,9 @@ $searchurl = $config['search-url'];
 $search = isset($_GET['search']) ? $_GET['search'] : '';
 $debug_on = $config['debug'];
 /* cache files */
+$ctt = $config['cache_toots'];;
 $dbt = "cache-toots.json";
 
-$timestamp = time();
-
 /* Exit if search empty */
 if (empty($search)) {
   debug("No proper search given");
@@ -35,14 +34,25 @@ function write_db($db, $data) {
   file_put_contents($db, $encoded, LOCK_EX);
 }
 /* access data from file */
-function read_db($db, &$data) {
+function read_db($db, &$data, &$cachebreak) {
+  global $ctt;
   // if DB does not exist, create it with empty array
   if (! file_exists($db)) {
     touch($db);
     write_db($db, array());
+    $cachebreak = true;
   }
   $file = file_get_contents($db, true);
-  $data = json_decode($file, true)['toots'];
+  $data = json_decode($file, true);
+
+  debug($data['timestamp']);
+
+  // check if timestamp in cache file too old
+  if (empty($data['timestamp']) || ($data['timestamp'] + $ctt < time())) {
+    $cachebreak = true;
+  }
+
+  $data = $data['toots'];
 }
 
 /* TOOT FUNCTIONS */
@@ -121,10 +131,15 @@ function tootStats($instance, $id, &$result) {
  * START PROGRAM
  ***************/
 
+/* check whether the cached file containing all toots is older than max. cache time */
+// this at the same time loads the cached DB, either way
+$cachebreak = false;
+read_db($dbt, $toots, $cachebreak);
+
+if ($cachebreak) {
   /* Collect all the toots */
   /* get id of latest cached toot, and set as $min_id */
-read_db($dbt, $toots);
-$toots_cached = $toots;
+  debug("Toots cache oudated. Checking for new toots");
   if (!empty($toots['0']['id'])) {
     $min_id_cached = $toots['0']['id'];
     $min_id = $min_id_cached;
@@ -152,6 +167,9 @@ while ($uptodate === false) {
       $min_id = $min_id_new;
     }
   }
+} else {
+  debug("Toots cache is OK");
+}
 
 /* prepare $result array */
 $result = ['comments' => [], 'stats' => ['reblogs' => 0, 'favs' => 0, 'replies' => 0, 'url' => '', 'root' => 0]];