Merge pull request #3 from php-etl/feature/add-date-functions

feature/add-date-functions : add date functions

Author: gplanchat

src/DateTime.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kiboko\Component\StringExpressionLanguage;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+
+class DateTime extends ExpressionFunction
+{
+    public function __construct($name)
+    {
+        parent::__construct(
+            $name,
+            \Closure::fromCallable([$this, 'compile'])->bindTo($this),
+            \Closure::fromCallable([$this, 'evaluate'])->bindTo($this)
+        );
+    }
+
+    private function compile(string $date, string $format, string $timezone = null)
+    {
+        return <<<"PHP"
+            \\DateTimeImmutable::createFromFormat({$format}, {$date}, {$timezone} !== null ? new \\DateTimeZone({$timezone}) : null)
+        PHP;
+    }
+
+    private function evaluate(array $context, string $date, string $format, string $timezone = null)
+    {
+        return \DateTimeImmutable::createFromFormat($format,$date, $timezone !== null ? new \DateTimeZone($timezone) : null);
+    }
+}

src/FormatDate.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Kiboko\Component\StringExpressionLanguage;
+
+use Symfony\Component\ExpressionLanguage\ExpressionFunction;
+
+class FormatDate extends ExpressionFunction
+{
+    public function __construct($name)
+    {
+        parent::__construct(
+            $name,
+            \Closure::fromCallable([$this, 'compile'])->bindTo($this),
+            \Closure::fromCallable([$this, 'evaluate'])->bindTo($this)
+        );
+    }
+
+    private function compile(string $dateTime, string $format)
+    {
+        return <<<"PHP"
+            {$dateTime}->format({$format})
+        PHP;
+    }
+
+    private function evaluate(array $context, string $dateTime, string $format)
+    {
+        return $dateTime->format($format);
+    }
+}

src/StringExpressionLanguageProvider.php

@@ -14,6 +14,8 @@ public function getFunctions(): array
             ExpressionFunction::fromPhp('trim', 'trim'),
             ExpressionFunction::fromPhp('str_replace', 'replace'),
             new FileName('fileName'),
+            new DateTime('dateTime'),
+            new FormatDate('formatDate'),
         ];
     }
 }