(MINOR) Implement DateFormatValidator

1 files changed, 45 insertions, 0 deletions

diff --git a/src/Validators/DateFormatValidator.php b/src/Validators/DateFormatValidator.php
new file mode 100644
index 0000000..fedbb7d
--- /dev/null
+++ b/src/Validators/DateFormatValidator.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Askonomm\Hird\Validators;
+
+/**
+ * Implements a DateFormat validator that has a job 
+ * of validating that a given date is in the correct
+ * format.
+ * 
+ * @author Asko Nomm <asko@bien.ee>
+ */
+class DateFormatValidator implements Validator
+{
+    /**
+     * Returns a boolean `true` when given `$value` is a valid e-mail
+     * address. Returns `false` otherwise.
+     *
+     * @param string $field
+     * @param mixed $value
+     * @param mixed $modifier
+     * @return boolean
+     */
+    public static function validate(string $field, mixed $value, mixed $modifier = null): bool
+    {
+        if ($value) {
+            $datetime = \DateTime::createFromFormat($modifier, $value);
+
+            return $datetime !== false && !array_sum($datetime::getLastErrors());
+        }
+
+        return true;
+    }
+
+    /**
+     * Composes the error message in case the validation fails.
+     *
+     * @param string $field
+     * @param mixed $modifier
+     * @return string
+     */
+    public static function composeError(string $field, mixed $modifier = null): string
+    {
+        return "${field} does not match the required date format ${modifier}.";
+    }
+}