Implemented 'getDate'.

Signed-off-by: Johannes Tegnér <[email protected]>

src/Personnummer.php

@@ -148,7 +148,6 @@ private static function getParts(string $ssn): array
         }
 
         $parts['fullYear'] = $parts['century'] . $parts['year'];
-
         $parts['original'] = $ssn;
         return $parts;
     }
@@ -230,6 +229,14 @@ public function getAge(): int
         return (new DateTime())->diff($birthday)->y;
     }
 
+    public function getDate(): DateTime
+    {
+        return DateTime::createFromFormat(
+            'Ymd',
+            $this->parts['fullYear'] .$this->parts['month'] . $this->parts['realDay']
+        );
+    }
+
     public function __get(string $name)
     {
         if (isset($this->parts[$name])) {

src/PersonnummerInterface.php

@@ -2,6 +2,7 @@
 
 namespace Personnummer;
 
+use DateTime;
 use Exception;
 
 /**
@@ -89,4 +90,11 @@ public function __construct(string $ssn, array $options = []);
      * @throws Exception When date is invalid or problems with DateTime library
      */
     public function getAge(): int;
+
+    /**
+     * Get the date part of the personnummer as a DateTime object.
+     *
+     * @return DateTime
+     */
+    public function getDate(): DateTime;
 }

tests/PersonnummerTest.php

@@ -236,4 +236,29 @@ public function testIsNotInterim(): void
             }
         }
     }
+
+    public function testDate(): void
+    {
+        foreach (self::$testdataList as $testdata) {
+            if (!$testdata['valid']) {
+                continue;
+            }
+
+            $val = $testdata['long_format'];
+            if ($testdata['type'] === 'con') {
+                // If it's a coordination number, we aught to remove 60 from the "real day" to make sure
+                // we get the correct date.
+                $val = substr($testdata['long_format'], 0, 6); // YYMM
+                $val .= (int)substr($testdata['long_format'], 6, 2) - 60; // DD
+            }
+
+            $pn   = Personnummer::parse($testdata['separated_format']);
+            $date = DateTime::createFromFormat('Ymd', substr($val, 0, 8)); // Only want YYYYMMDD
+
+            self::assertSame(
+                $pn->getDate()->format("Ymd"),
+                $date->format('Ymd')
+            );
+        }
+    }
 }