init enum for data type

src/enums/DatatypeEnum.php

@@ -0,0 +1,113 @@
+<?php
+namespace CSV\enums;
+
+/**
+ * Class DatatypeEnum
+ *
+ * @package CSV\enums
+ */
+class DatatypeEnum extends SplEnum {
+
+    const __DEFAULT = self::TYPE_STRING;
+
+    const TYPE_STRING = 'string';
+
+    const TYPE_FLOAT = 'float';
+
+    const TYPE_INT = 'integer';
+
+    const TYPE_BOOL = 'boolean';
+
+    const TYPE_DATE = 'date';
+
+    const REGEX_FLOAT = '/^[+-]?([0-9]*[.,])?([0-9]|[.,][0-9])+$/';
+
+    const REGEX_INT = '/^[-+]?[0-9]\d*$/';
+
+    const REGEX_BOOL = '/^(?i:true|false)$/';
+
+    /**
+     * Define validator functions here.
+     *
+     * @var array
+     */
+    private static $validators = array(
+        self::TYPE_STRING => null,
+        self::TYPE_FLOAT => 'isValidFloat',
+        self::TYPE_INT => 'isValidInteger',
+        self::TYPE_BOOL => 'isValidBoolean',
+        self::TYPE_DATE => 'isValidDate'
+    );
+
+    /**
+     * Checks data type for given string.
+     *
+     * @param $value
+     *
+     * @return bool|string
+     */
+    public static function getValidTypeFromSample($value){
+        $value = trim((string) $value);
+
+        if (empty($value)){
+            return false;
+        }
+
+        foreach (self::$validators as $type => $validator){
+            if ($validator === null){
+                continue;
+            }
+
+            if (method_exists(self, $validator)){
+                call_user_func($validator($value));
+                return $type;
+            }
+
+            return self::__DEFAULT;
+        }
+    }
+
+    /**
+     * Check if string is float value.
+     *
+     * @param $value
+     *
+     * @return false|int
+     */
+    private static function isValidFloat($value) {
+        return preg_match(self::REGEX_FLOAT, $value);
+    }
+
+    /**
+     * Check if string is integer value.
+     *
+     * @param $value
+     *
+     * @return false|int
+     */
+    private static function isValidInteger($value) {
+        return preg_match(self::REGEX_INT, $value);
+    }
+
+    /**
+     * Check if string is boolean.
+     *
+     * @param $value
+     *
+     * @return false|int
+     */
+    private static function isValidBoolean($value) {
+        return preg_match(self::REGEX_BOOL, $value);
+    }
+
+    /**
+     * Check if string is date.
+     *
+     * @param $value
+     *
+     * @return false|int
+     */
+    private static function isValidDate($value) {
+        return (bool) strtotime($value);
+    }
+}