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269 lines
10 KiB
PHP
269 lines
10 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\helpers;
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use yii\base\Arrayable;
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use yii\base\InvalidArgumentException;
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use yii\base\Model;
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use yii\web\JsExpression;
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use yii\web\JsonResponseFormatter;
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/**
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* BaseJson provides concrete implementation for [[Json]].
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*
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* Do not use BaseJson. Use [[Json]] instead.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class BaseJson
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{
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/**
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* @var bool|null Enables human readable output a.k.a. Pretty Print.
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* This can useful for debugging during development but is not recommended in a production environment!
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* In case `prettyPrint` is `null` (default) the `options` passed to `encode` functions will not be changed.
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* @since 2.0.43
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*/
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public static $prettyPrint;
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/**
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* @var bool Avoids objects with zero-indexed keys to be encoded as array
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* `Json::encode((object)['test'])` will be encoded as an object not as an array. This matches the behaviour of `json_encode()`.
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* Defaults to false to avoid any backwards compatibility issues.
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* Enable for single purpose: `Json::$keepObjectType = true;`
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* @see JsonResponseFormatter documentation to enable for all JSON responses
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* @since 2.0.44
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*/
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public static $keepObjectType = false;
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/**
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* @var array List of JSON Error messages assigned to constant names for better handling of PHP <= 5.5.
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* @since 2.0.7
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*/
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public static $jsonErrorMessages = [
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'JSON_ERROR_SYNTAX' => 'Syntax error',
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'JSON_ERROR_UNSUPPORTED_TYPE' => 'Type is not supported',
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'JSON_ERROR_DEPTH' => 'The maximum stack depth has been exceeded',
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'JSON_ERROR_STATE_MISMATCH' => 'Invalid or malformed JSON',
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'JSON_ERROR_CTRL_CHAR' => 'Control character error, possibly incorrectly encoded',
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'JSON_ERROR_UTF8' => 'Malformed UTF-8 characters, possibly incorrectly encoded',
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];
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/**
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* Encodes the given value into a JSON string.
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*
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* The method enhances `json_encode()` by supporting JavaScript expressions.
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* In particular, the method will not encode a JavaScript expression that is
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* represented in terms of a [[JsExpression]] object.
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*
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* Note that data encoded as JSON must be UTF-8 encoded according to the JSON specification.
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* You must ensure strings passed to this method have proper encoding before passing them.
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*
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* @param mixed $value the data to be encoded.
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* @param int $options the encoding options. For more details please refer to
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* <https://www.php.net/manual/en/function.json-encode.php>. Default is `JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE`.
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* @return string the encoding result.
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* @throws InvalidArgumentException if there is any encoding error.
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*/
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public static function encode($value, $options = 320)
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{
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$expressions = [];
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$value = static::processData($value, $expressions, uniqid('', true));
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set_error_handler(function () {
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static::handleJsonError(JSON_ERROR_SYNTAX);
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}, E_WARNING);
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if (static::$prettyPrint === true) {
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$options |= JSON_PRETTY_PRINT;
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} elseif (static::$prettyPrint === false) {
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$options &= ~JSON_PRETTY_PRINT;
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}
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$json = json_encode($value, $options);
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restore_error_handler();
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static::handleJsonError(json_last_error());
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return $expressions === [] ? $json : strtr($json, $expressions);
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}
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/**
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* Encodes the given value into a JSON string HTML-escaping entities so it is safe to be embedded in HTML code.
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*
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* The method enhances `json_encode()` by supporting JavaScript expressions.
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* In particular, the method will not encode a JavaScript expression that is
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* represented in terms of a [[JsExpression]] object.
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*
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* Note that data encoded as JSON must be UTF-8 encoded according to the JSON specification.
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* You must ensure strings passed to this method have proper encoding before passing them.
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*
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* @param mixed $value the data to be encoded
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* @return string the encoding result
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* @since 2.0.4
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* @throws InvalidArgumentException if there is any encoding error
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*/
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public static function htmlEncode($value)
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{
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return static::encode($value, JSON_UNESCAPED_UNICODE | JSON_HEX_QUOT | JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS);
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}
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/**
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* Decodes the given JSON string into a PHP data structure.
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* @param string $json the JSON string to be decoded
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* @param bool $asArray whether to return objects in terms of associative arrays.
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* @return mixed the PHP data
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* @throws InvalidArgumentException if there is any decoding error
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*/
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public static function decode($json, $asArray = true)
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{
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if (is_array($json)) {
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throw new InvalidArgumentException('Invalid JSON data.');
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} elseif ($json === null || $json === '') {
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return null;
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}
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$decode = json_decode((string) $json, $asArray);
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static::handleJsonError(json_last_error());
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return $decode;
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}
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/**
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* Handles [[encode()]] and [[decode()]] errors by throwing exceptions with the respective error message.
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*
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* @param int $lastError error code from [json_last_error()](https://www.php.net/manual/en/function.json-last-error.php).
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* @throws InvalidArgumentException if there is any encoding/decoding error.
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* @since 2.0.6
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*/
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protected static function handleJsonError($lastError)
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{
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if ($lastError === JSON_ERROR_NONE) {
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return;
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}
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if (PHP_VERSION_ID >= 50500) {
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throw new InvalidArgumentException(json_last_error_msg(), $lastError);
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}
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foreach (static::$jsonErrorMessages as $const => $message) {
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if (defined($const) && constant($const) === $lastError) {
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throw new InvalidArgumentException($message, $lastError);
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}
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}
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throw new InvalidArgumentException('Unknown JSON encoding/decoding error.');
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}
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/**
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* Pre-processes the data before sending it to `json_encode()`.
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* @param mixed $data the data to be processed
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* @param array $expressions collection of JavaScript expressions
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* @param string $expPrefix a prefix internally used to handle JS expressions
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* @return mixed the processed data
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*/
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protected static function processData($data, &$expressions, $expPrefix)
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{
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$revertToObject = false;
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if (is_object($data)) {
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if ($data instanceof JsExpression) {
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$token = "!{[$expPrefix=" . count($expressions) . ']}!';
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$expressions['"' . $token . '"'] = $data->expression;
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return $token;
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}
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if ($data instanceof \JsonSerializable) {
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return static::processData($data->jsonSerialize(), $expressions, $expPrefix);
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}
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if ($data instanceof \DateTimeInterface) {
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return static::processData((array)$data, $expressions, $expPrefix);
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}
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if ($data instanceof Arrayable) {
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$data = $data->toArray();
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} elseif ($data instanceof \SimpleXMLElement) {
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$data = (array) $data;
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// Avoid empty elements to be returned as array.
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// Not breaking BC because empty array was always cast to stdClass before.
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$revertToObject = true;
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} else {
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/*
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* $data type is changed to array here and its elements will be processed further
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* We must cast $data back to object later to keep intended dictionary type in JSON.
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* Revert is only done when keepObjectType flag is provided to avoid breaking BC
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*/
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$revertToObject = static::$keepObjectType;
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$result = [];
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foreach ($data as $name => $value) {
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$result[$name] = $value;
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}
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$data = $result;
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// Avoid empty objects to be returned as array (would break BC without keepObjectType flag)
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if ($data === []) {
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$revertToObject = true;
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}
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}
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}
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if (is_array($data)) {
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foreach ($data as $key => $value) {
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if (is_array($value) || is_object($value)) {
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$data[$key] = static::processData($value, $expressions, $expPrefix);
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}
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}
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}
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return $revertToObject ? (object) $data : $data;
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}
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/**
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* Generates a summary of the validation errors.
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*
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* @param Model|Model[] $models the model(s) whose validation errors are to be displayed.
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* @param array $options the tag options in terms of name-value pairs. The following options are specially handled:
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*
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* - showAllErrors: boolean, if set to true every error message for each attribute will be shown otherwise
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* only the first error message for each attribute will be shown. Defaults to `false`.
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*
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* @return string the generated error summary
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* @since 2.0.14
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*/
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public static function errorSummary($models, $options = [])
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{
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$showAllErrors = ArrayHelper::remove($options, 'showAllErrors', false);
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$lines = self::collectErrors($models, $showAllErrors);
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return static::encode($lines);
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}
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/**
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* Return array of the validation errors.
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*
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* @param Model|Model[] $models the model(s) whose validation errors are to be displayed.
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* @param bool $showAllErrors if set to true every error message for each attribute will be shown otherwise
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* only the first error message for each attribute will be shown.
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* @return array of the validation errors
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* @since 2.0.14
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*/
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private static function collectErrors($models, $showAllErrors)
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{
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$lines = [];
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if (!is_array($models)) {
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$models = [$models];
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}
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foreach ($models as $model) {
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$lines[] = $model->getErrorSummary($showAllErrors);
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}
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return array_unique(call_user_func_array('array_merge', $lines));
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}
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}
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