Added Date.php from Steam 250.

src/Generate/Date.php

@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+
+namespace ScriptFUSION\Steam250\SiteGenerator\Generate;
+
+use ScriptFUSION\StaticClass;
+
+final class Date
+{
+    use StaticClass;
+
+    /**
+     * Adaptively transforms the specified date, producing a relative or absolute date depending upon how recent it is.
+     *
+     * @param string|\DateTimeInterface $date Date.
+     *
+     * @return string Absolute or relative date.
+     */
+    public static function adapt($date): string
+    {
+        $date = is_string($date) ? new \DateTimeImmutable($date) : $date;
+        $diff = $date->diff(new \DateTime);
+
+        // Absolute.
+        if ($diff->days > 30) {
+            return $date->format('M Y');
+        }
+
+        // Relative.
+        switch ($diff->days) {
+            case 0:
+                return 'today';
+
+            case 1:
+                return 'yesterday';
+        }
+
+        return "$diff->days days";
+    }
+}