FEATURE added a Year field to work with MYSQL's built in year type.

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@54551 467b73ca-7a2a-4603-9d3b-597d59a354a9

core/model/fieldtypes/Year.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * @package sapphire
+ * @subpackage model
+ */
+
+/**
+ * Represents a single year field.
+ * 
+ * @package sapphire
+ * @subpackage model
+ */
+class Year extends DBField {
+	
+	function requireField() {
+		DB::requireField($this->tableName, $this->name, "year(4)");
+	}
+	
+	public function scaffoldFormField($title = null) {
+		$selectBox = new DropdownField($this->name, $title);
+		$selectBox->setSource($this->getDefaultOptions());
+		return $selectBox;
+	}
+	
+	/**
+	 * Returns a list of default options that can
+	 * be used to populate a select box, or compare against
+	 * input values. Starts by default at the current year,
+	 * and counts back to 1900.
+	 *
+	 * @param int $start starting date to count down from
+	 * @param int $end end date to count down to
+	 * @return array
+	 */
+	private function getDefaultOptions($start=false, $end=false) {
+		if (!$start) $start = (int)date('Y');
+		if (!$end) $end = 1900;
+		$years = array();
+		for($i=$start;$i>=$end;$i--) {
+			$years[] = $i;
+		}
+		return $years;
+	}
+	
+}
+?>