Merge pull request #911 from GSA/910-validate-date-in-benefit-form-el…

…igibility

910 validate date in Benefit form acceptable value

usagov_benefit_finder/modules/usagov_benefit_finder_content/usagov_benefit_finder_content.module

@@ -92,6 +92,34 @@ function usagov_benefit_finder_content_node_bears_benefit_edit_form_validate(arr
         }
       }
     }
+
+    if (in_array($criteria_type, ['Date'])) {
+      foreach ($acceptable_values as $value) {
+        if (!empty($value)) {
+          if (strpos($value, ' ') !== FALSE) {
+            $errors[] = t("Criteria \"$criteria_title\" acceptable value \"$value\" cannot contain space.");
+            continue;
+          }
+          $pattern = '/^(=|>|<|>=|<=)(\d{2}-\d{2}-\d{4}|\d{1,2}years)$/';
+          if (preg_match($pattern, $value, $matches) === 1) {
+            $secondPart = $matches[2];
+            if (preg_match('/^\d{2}-\d{2}-\d{4}$/', $secondPart, $matches) === 1) {
+              $dateTime = DateTime::createFromFormat('m-d-Y', $secondPart);
+              if (!($dateTime && $dateTime->format('m-d-Y') === $secondPart)) {
+                $errors[] = t("Criteria \"$criteria_title\" acceptable value \"$value\" date \"$secondPart\" is invalid.");
+                $errors[] = t("--- Format: MM-DD-YYYY");
+              }
+            }
+          }
+          else {
+            $errors[] = t("Criteria \"$criteria_title\" acceptable value \"$value\" is incorrect.");
+            $errors[] = t("---The prefix must include only one of the following comparison operators: '>', '<', '=', '>=', or '<='.
+
+--- The suffix must be formatted as either 'MM-DD-YYYY' or '(d or dd)years'.");
+          }
+        }
+      }
+    }
   }
 
   if (!empty($errors)) {