CSV import, also from file, and more UX improvements

porklib/Utils/Utils.php

@@ -1014,8 +1014,25 @@ class Utils
         return $key;
     }
 
-    public static function csvToArray(string $data)
+    /**
+     * @param \SplFileObject|string $data
+     * @return array
+     */
+    public static function csvToArray($data)
     {
-        return array_map('str_getcsv', explode("\n", $data));
+        if ($data instanceof \SplFileObject) {
+            $data->setFlags(\SplFileObject::SKIP_EMPTY | \SplFileObject::DROP_NEW_LINE);
+            $lines = [];
+            while (! $data->eof()) {
+                $line = $data->fgetcsv();
+                if ($line !== null) {
+                    $lines[] = $line;
+                }
+            }
+            return $lines;
+        }
+        else {
+            return array_map('str_getcsv', explode("\n", $data));
+        }
     }
 }