Added support for cell formats when writing Excel files

src/Spout/Common/Entity/Style/Style.php

@@ -71,6 +71,12 @@ class Style
     /** @var bool */
     private $hasSetBackgroundColor = false;
 
+    /** @var string Format */
+    private $format = null;
+
+    /** @var bool */
+    private $hasSetFormat = false;
+
     /**
      * @return int|null
      */
@@ -383,4 +389,34 @@ class Style
     {
         return $this->hasSetBackgroundColor;
     }
+
+    /**
+     * Sets format
+     * @param string $format
+     * @return Style
+     */
+    public function setFormat($format)
+    {
+        $this->hasSetFormat = true;
+        $this->format = $format;
+
+        return $this;
+    }
+
+    /**
+     * @return string
+     */
+    public function getFormat()
+    {
+        return $this->format;
+    }
+
+    /**
+     *
+     * @return bool Whether format should be applied
+     */
+    public function shouldApplyFormat()
+    {
+        return $this->hasSetFormat;
+    }
 }