Resolved gh-441 to allow fieldtype name prefixing. Resolved gh-443 to allow Alphanumeric+dot in fieldtype name. Fixed gh-446 to insure that JFormRuleInt validates correctly in the admin field realtions. Improved the new plugin area to also have system name and option to add custom header code. gh-436

admin/models/rules/int.php

@@ -21,5 +21,36 @@ use Joomla\Registry\Registry;
  */
 class JFormRuleInt extends FormRule
 {
+	/**
+	 * Method to test that an integer value was added.
+	 *
+	 * @param   \SimpleXMLElement  $element  The SimpleXMLElement object representing the `<field>` tag for the form field object.
+	 * @param   mixed              $value    The form field value to validate.
+	 * @param   string             $group    The field name group control value. This acts as an array container for the field.
+	 *                                       For example if the field has name="foo" and the group value is set to "bar" then the
+	 *                                       full field name would end up being "bar[foo]".
+	 * @param   Registry           $input    An optional Registry object with the entire data set to validate against the entire form.
+	 * @param   Form               $form     The form object for which the field is being tested.
+	 *
+	 * @return  boolean  True if the value is valid integer, false otherwise.
+	 *
+	 */
+	public function test(\SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	{
+		// Check if the field is required.
+		$required = ((string) $element['required'] == 'true' || (string) $element['required'] == 'required');
 
+		// If the value is empty and the field is not required return True.
+		if (($value === '' || $value === null) && ! $required)
+		{
+			return true;
+		}
+
+		// now validate the value to be an integer
+		// we need to validate a string with the integer in it
+		// since this is how Joomla passes the value to the test method
+		// so we use type coercion along with is_numeric
+		return is_numeric($value) && is_int(+$value);
+		// if you have a better idea... lets hear it.
+	}
 }