improved error reporting

classes/CSVXMLValidator.php

@@ -24,4 +24,26 @@ public function __construct()
         $inv_errors = [];
         $depcon_errors = [];
     }
+
+    public function addError(String $error)
+    {
+        $this->error_msgs[] = $error;
+    }
+
+    public function addInvError(String $error)
+    {
+        $this->inv_errors[] = $error;
+    }
+
+    public function addDepconError(String $error)
+    {
+        $this->depcon_errors[] = $error;
+    }
+
+    public function overallErrorCount(): int
+    {
+        return count($this->error_msgs)
+            + count($this->inv_errors)
+            + count($this->depcon_errors);
+    }
 }