Add missing classes

src/Aviat/Ion/Json.php

@@ -0,0 +1,119 @@
+<?php
+/**
+ * Ion
+ *
+ * Building blocks for web development
+ *
+ * @package     Ion
+ * @author      Timothy J. Warren
+ * @copyright   Copyright (c) 2015 - 2016
+ * @license     MIT
+ */
+
+namespace Aviat\Ion;
+
+use Aviat\Ion\Type\StringType;
+
+/**
+ * Helper class for json convenience methods
+ */
+class Json {
+
+	/**
+	 * Encode data in json format
+	 *
+	 * @param mixed $data
+	 * @param int $options=0
+	 * @param int $depth=512
+	 * @return string
+	 */
+	public static function encode($data, $options = 0, $depth = 512)
+	{
+		$json = json_encode($data, $options, $depth);
+		self::check_json_error();
+		return $json;
+	}
+
+	/**
+	 * Encode data in json format and save to a file
+	 *
+	 * @param string $filename
+	 * @param mixed $data
+	 * @param int $json_options - Options to pass to json_encode
+	 * @param int $file_options - Options to pass to file_get_contents
+	 * @return int
+	 */
+	public static function encodeFile($filename, $data, $json_options = 0, $file_options = 0)
+	{
+		$json = self::encode($data, $json_options);
+		return file_put_contents($filename, $json, $file_options);
+	}
+
+	/**
+	 * Decode data from json
+	 *
+	 * @param string $json
+	 * @param bool $assoc
+	 * @param int $depth
+	 * @param int $options
+	 * @return mixed
+	 */
+	public static function decode($json, $assoc = TRUE, $depth = 512, $options = 0)
+	{
+		$data = json_decode($json, $assoc, $depth, $options);
+		self::check_json_error();
+		return $data;
+	}
+
+	/**
+	 * Decode json data loaded from the passed filename
+	 *
+	 * @param string $filename
+	 * @return mixed
+	 */
+	public static function decodeFile($filename)
+	{
+		$json = file_get_contents($filename);
+		return self::decode($json);
+	}
+
+	/**
+	 * Determines whether a string is valid json
+	 *
+	 * @param  string  $string
+	 * @return boolean
+	 */
+	public static function isJson($string)
+	{
+		return StringType::create($string)->isJson();
+	}
+
+	/**
+	 * Call the json error functions to check for errors encoding/decoding
+	 *
+	 * @throws JsonException
+	 */
+	protected static function check_json_error()
+	{
+		$constant_map = [
+			JSON_ERROR_NONE => 'JSON_ERROR_NONE',
+			JSON_ERROR_DEPTH => 'JSON_ERROR_DEPTH',
+			JSON_ERROR_STATE_MISMATCH => 'JSON_ERROR_STATE_MISMATCH',
+			JSON_ERROR_CTRL_CHAR => 'JSON_ERROR_CTRL_CHAR',
+			JSON_ERROR_SYNTAX => 'JSON_ERROR_SYNTAX',
+			JSON_ERROR_UTF8 => 'JSON_ERROR_UTF8',
+			JSON_ERROR_RECURSION => 'JSON_ERROR_RECURSION',
+			JSON_ERROR_INF_OR_NAN => 'JSON_ERROR_INF_OR_NAN',
+			JSON_ERROR_UNSUPPORTED_TYPE => 'JSON_ERROR_UNSUPPORTED_TYPE'
+		];
+
+		$error = json_last_error();
+		$message = json_last_error_msg();
+
+		if (\JSON_ERROR_NONE !== $error)
+		{
+			throw new JsonException("{$constant_map[$error]} - {$message}", $error);
+		}
+	}
+}
+// End of JSON.php

src/Aviat/Ion/JsonException.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Ion
+ *
+ * Building blocks for web development
+ *
+ * @package     Ion
+ * @author      Timothy J. Warren
+ * @copyright   Copyright (c) 2015 - 2016
+ * @license     MIT
+ */
+
+namespace Aviat\Ion;
+
+class JsonException extends \InvalidArgumentException {
+
+}
+// End of JsonException.php