Added Newsletter::getArchives() in order to return proper archives

- Archives page: replaced created_at by processed_at as the issue date

lib/Config/Shortcodes.php

@@ -67,17 +67,16 @@ class Shortcodes {
   }
 
   function getArchive($params) {
+    $segment_ids = array();
     if(!empty($params['segments'])) {
       $segment_ids = array_map(function($segment_id) {
         return (int)trim($segment_id);
       }, explode(',', $params['segments']));
     }
 
-    $newsletters = array();
     $html = '';
 
-    // TODO: needs more advanced newsletters in order to finish
+    $newsletters = Newsletter::getArchives($segment_ids);
-    $newsletters = Newsletter::limit(10)->orderByDesc('created_at')->findMany();
 
     if(empty($newsletters)) {
       return apply_filters(
@@ -109,7 +108,7 @@ class Shortcodes {
   function renderArchiveDate($newsletter) {
     return date_i18n(
       get_option('date_format'),
-      strtotime($newsletter->created_at)
+      strtotime($newsletter->processed_at)
     );
   }
 

lib/Models/Newsletter.php

@@ -611,4 +611,31 @@ class Newsletter extends Model {
       ->whereIn('options.value', $segments)
       ->findMany();
   }
+
+  static function getArchives($segment_ids = array()) {
+    $orm = self::table_alias('newsletters')
+      ->distinct()->select('newsletters.*')
+      ->whereIn('newsletters.type', array(
+        self::TYPE_STANDARD,
+        self::TYPE_NOTIFICATION_HISTORY
+      ))
+      ->join(
+        MP_SENDING_QUEUES_TABLE,
+        'queues.newsletter_id = newsletters.id',
+        'queues'
+      )
+      ->where('queues.status', SendingQueue::STATUS_COMPLETED)
+      ->select('queues.processed_at')
+      ->orderByDesc('queues.processed_at');
+
+    if(!empty($segment_ids)) {
+      $orm->join(
+        MP_NEWSLETTER_SEGMENT_TABLE,
+        'newsletter_segments.newsletter_id = newsletters.id',
+        'newsletter_segments'
+      )
+      ->whereIn('newsletter_segments.segment_id', $segment_ids);
+    }
+    return $orm->findMany();
+  }
 }