Add exceptions for invalid weight and length units

MDErrorReporter.php

@@ -38,6 +38,7 @@ class MDErrorReporter {
             || $exception instanceof MDPageNotInAggregatedException
             || $exception instanceof MDWrongFileType
             || $exception instanceof MDTooManyFilesUploadException
+            || $exception instanceof MDgenericInvalidInputsException
             || $exception instanceof MDExpectedException
             || $exception instanceof MDMysqliExpectedError
         ) {

exceptions/updates/MDInvalidLengthUnit.php

@@ -0,0 +1,29 @@
+<?PHP
+/**
+ * This file contains an exception class for usage of unaccepted length units.
+ *
+ * @file
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Custom exception class to be raised when trying to use a length unit that is not
+ * accepted by museum-digital.
+ */
+class MDInvalidLengthUnit extends MDgenericInvalidInputsException {
+
+    /**
+     * Error message.
+     *
+     * @return string
+     */
+    public function errorMessage() {
+        //error message
+        $errorMsg = 'The following length unit is not available: ' . $this->getMessage();
+        return $errorMsg;
+
+    }
+
+}

exceptions/updates/MDInvalidLicense.php

@@ -12,7 +12,7 @@ declare(strict_types = 1);
  * Custom exception class to be raised when trying to use a license that is not
  * accepted by museum-digital.
  */
-class MDInvalidLicense extends Exception {
+class MDInvalidLicense extends MDgenericInvalidInputsException {
 
     /**
      * Error message.

exceptions/updates/MDInvalidWeightUnit.php

@@ -0,0 +1,29 @@
+<?PHP
+/**
+ * This file contains an exception class for usage of unaccepted weight units.
+ *
+ * @file
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+/**
+ * Custom exception class to be raised when trying to use a weight unit that is not
+ * accepted by museum-digital.
+ */
+class MDInvalidWeightUnit extends MDgenericInvalidInputsException {
+
+    /**
+     * Error message.
+     *
+     * @return string
+     */
+    public function errorMessage() {
+        //error message
+        $errorMsg = 'The following weight unit is not available: ' . $this->getMessage();
+        return $errorMsg;
+
+    }
+
+}