🛀 data mode rework

src/Data/QRDataModeInterface.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * Interface QRDataModeInterface
+ *
+ * @filesource   QRDataModeInterface.php
+ * @created      01.12.2015
+ * @package      chillerlan\QRCode\Data
+ * @author       Smiley <smiley@chillerlan.net>
+ * @copyright    2015 Smiley
+ * @license      MIT
+ */
+
+namespace chillerlan\QRCode\Data;
+
+/**
+ * Specifies the methods reqired for the data modules (Number, Alphanum, Byte and Kanji)
+ * and holds version information in several constants
+ */
+interface QRDataModeInterface{
+
+	/**
+	 * returns the length bits for the given breakpoint [0,1,2]
+	 */
+	public function getLengthBits(int $k):int;
+
+	/**
+	 * retruns the length in bits of the data string
+	 */
+	public function getLengthInBits():int;
+
+	/**
+	 * checks if the given string qualifies for the encoder module
+	 */
+	public static function validateString(string $string):bool;
+
+	/**
+	 * writes the actual data string to the BitBuffer, uses the given version to determine the length bits
+	 *
+	 * @see \chillerlan\QRCode\Data\QRData::writeBitBuffer()
+	 */
+	public function write(int $version):void;
+
+}