MessageBag.php
TLDR
The MessageBag.php file in the Illuminate\Support namespace contains the implementation of the MessageBag class. This class is responsible for managing messages in a message bag, including adding, retrieving, and formatting messages. It implements several interfaces, such as Jsonable, JsonSerializable, MessageBagContract, MessageProvider, and Stringable.
Methods
__construct
Creates a new instance of the MessageBag class and initializes it with the given array of messages.
keys
Returns an array of all the keys present in the message bag.
add
Adds a message to the message bag with the specified key and message.
addIf
Adds a message to the message bag if the given conditional is true.
isUnique
Checks if a key and message combination already exists in the message bag.
merge
Merges a new array of messages into the message bag.
has
Checks if messages exist for the given keys. If no key is provided, it checks if messages exist for any key.
hasAny
Checks if messages exist for any of the given keys.
missing
Checks if messages don't exist for all of the given keys.
first
Gets the first message from the message bag for a given key.
get
Gets all the messages from the message bag for a given key.
getMessagesForWildcardKey
Gets the messages for a wildcard key.
all
Gets all the messages from the message bag.
unique
Gets all the unique messages from the message bag.
forget
Removes a message from the message bag.
transform
Formats an array of messages.
checkFormat
Gets the appropriate format based on the given format.
messages
Gets the raw messages in the message bag.
getMessages
Gets the raw messages in the message bag.
getMessageBag
Gets the messages for the instance.
getFormat
Gets the default message format.
setFormat
Sets the default message format.
isEmpty
Checks if the message bag has any messages.
isNotEmpty
Checks if the message bag has any messages.
any
Checks if the message bag has any messages.
count
Gets the number of messages in the message bag.
toArray
Converts the instance to an array.
jsonSerialize
Converts the object into something JSON serializable.
toJson
Converts the message bag to its JSON representation.
__toString
Converts the message bag to its string representation.
<?php
namespace Illuminate\Support;
use Illuminate\Contracts\Support\Arrayable;
use Illuminate\Contracts\Support\Jsonable;
use Illuminate\Contracts\Support\MessageBag as MessageBagContract;
use Illuminate\Contracts\Support\MessageProvider;
use JsonSerializable;
use Stringable;
class MessageBag implements Jsonable, JsonSerializable, MessageBagContract, MessageProvider, Stringable
{
/**
* All of the registered messages.
*
* @var array
*/
protected $messages = [];
/**
* Default format for message output.
*
* @var string
*/
protected $format = ':message';
/**
* Create a new message bag instance.
*
* @param array $messages
* @return void
*/
public function __construct(array $messages = [])
{
foreach ($messages as $key => $value) {
$value = $value instanceof Arrayable ? $value->toArray() : (array) $value;
$this->messages[$key] = array_unique($value);
}
}
/**
* Get the keys present in the message bag.
*
* @return array
*/
public function keys()
{
return array_keys($this->messages);
}
/**
* Add a message to the message bag.
*
* @param string $key
* @param string $message
* @return $this
*/
public function add($key, $message)
{
if ($this->isUnique($key, $message)) {
$this->messages[$key][] = $message;
}
return $this;
}
/**
* Add a message to the message bag if the given conditional is "true".
*
* @param bool $boolean
* @param string $key
* @param string $message
* @return $this
*/
public function addIf($boolean, $key, $message)
{
return $boolean ? $this->add($key, $message) : $this;
}
/**
* Determine if a key and message combination already exists.
*
* @param string $key
* @param string $message
* @return bool
*/
protected function isUnique($key, $message)
{
$messages = (array) $this->messages;
return ! isset($messages[$key]) || ! in_array($message, $messages[$key]);
}
/**
* Merge a new array of messages into the message bag.
*
* @param \Illuminate\Contracts\Support\MessageProvider|array $messages
* @return $this
*/
public function merge($messages)
{
if ($messages instanceof MessageProvider) {
$messages = $messages->getMessageBag()->getMessages();
}
$this->messages = array_merge_recursive($this->messages, $messages);
return $this;
}
/**
* Determine if messages exist for all of the given keys.
*
* @param array|string|null $key
* @return bool
*/
public function has($key)
{
if ($this->isEmpty()) {
return false;
}
if (is_null($key)) {
return $this->any();
}
$keys = is_array($key) ? $key : func_get_args();
foreach ($keys as $key) {
if ($this->first($key) === '') {
return false;
}
}
return true;
}
/**
* Determine if messages exist for any of the given keys.
*
* @param array|string|null $keys
* @return bool
*/
public function hasAny($keys = [])
{
if ($this->isEmpty()) {
return false;
}
$keys = is_array($keys) ? $keys : func_get_args();
foreach ($keys as $key) {
if ($this->has($key)) {
return true;
}
}
return false;
}
/**
* Determine if messages don't exist for all of the given keys.
*
* @param array|string|null $key
* @return bool
*/
public function missing($key)
{
$keys = is_array($key) ? $key : func_get_args();
return ! $this->hasAny($keys);
}
/**
* Get the first message from the message bag for a given key.
*
* @param string|null $key
* @param string|null $format
* @return string
*/
public function first($key = null, $format = null)
{
$messages = is_null($key) ? $this->all($format) : $this->get($key, $format);
$firstMessage = Arr::first($messages, null, '');
return is_array($firstMessage) ? Arr::first($firstMessage) : $firstMessage;
}
/**
* Get all of the messages from the message bag for a given key.
*
* @param string $key
* @param string|null $format
* @return array
*/
public function get($key, $format = null)
{
// If the message exists in the message bag, we will transform it and return
// the message. Otherwise, we will check if the key is implicit & collect
// all the messages that match the given key and output it as an array.
if (array_key_exists($key, $this->messages)) {
return $this->transform(
$this->messages[$key], $this->checkFormat($format), $key
);
}
if (str_contains($key, '*')) {
return $this->getMessagesForWildcardKey($key, $format);
}
return [];
}
/**
* Get the messages for a wildcard key.
*
* @param string $key
* @param string|null $format
* @return array
*/
protected function getMessagesForWildcardKey($key, $format)
{
return collect($this->messages)
->filter(function ($messages, $messageKey) use ($key) {
return Str::is($key, $messageKey);
})
->map(function ($messages, $messageKey) use ($format) {
return $this->transform(
$messages, $this->checkFormat($format), $messageKey
);
})->all();
}
/**
* Get all of the messages for every key in the message bag.
*
* @param string|null $format
* @return array
*/
public function all($format = null)
{
$format = $this->checkFormat($format);
$all = [];
foreach ($this->messages as $key => $messages) {
$all = array_merge($all, $this->transform($messages, $format, $key));
}
return $all;
}
/**
* Get all of the unique messages for every key in the message bag.
*
* @param string|null $format
* @return array
*/
public function unique($format = null)
{
return array_unique($this->all($format));
}
/**
* Remove a message from the message bag.
*
* @param string $key
* @return $this
*/
public function forget($key)
{
unset($this->messages[$key]);
return $this;
}
/**
* Format an array of messages.
*
* @param array $messages
* @param string $format
* @param string $messageKey
* @return array
*/
protected function transform($messages, $format, $messageKey)
{
if ($format == ':message') {
return (array) $messages;
}
return collect((array) $messages)
->map(function ($message) use ($format, $messageKey) {
// We will simply spin through the given messages and transform each one
// replacing the :message place holder with the real message allowing
// the messages to be easily formatted to each developer's desires.
return str_replace([':message', ':key'], [$message, $messageKey], $format);
})->all();
}
/**
* Get the appropriate format based on the given format.
*
* @param string $format
* @return string
*/
protected function checkFormat($format)
{
return $format ?: $this->format;
}
/**
* Get the raw messages in the message bag.
*
* @return array
*/
public function messages()
{
return $this->messages;
}
/**
* Get the raw messages in the message bag.
*
* @return array
*/
public function getMessages()
{
return $this->messages();
}
/**
* Get the messages for the instance.
*
* @return \Illuminate\Support\MessageBag
*/
public function getMessageBag()
{
return $this;
}
/**
* Get the default message format.
*
* @return string
*/
public function getFormat()
{
return $this->format;
}
/**
* Set the default message format.
*
* @param string $format
* @return \Illuminate\Support\MessageBag
*/
public function setFormat($format = ':message')
{
$this->format = $format;
return $this;
}
/**
* Determine if the message bag has any messages.
*
* @return bool
*/
public function isEmpty()
{
return ! $this->any();
}
/**
* Determine if the message bag has any messages.
*
* @return bool
*/
public function isNotEmpty()
{
return $this->any();
}
/**
* Determine if the message bag has any messages.
*
* @return bool
*/
public function any()
{
return $this->count() > 0;
}
/**
* Get the number of messages in the message bag.
*
* @return int
*/
public function count(): int
{
return count($this->messages, COUNT_RECURSIVE) - count($this->messages);
}
/**
* Get the instance as an array.
*
* @return array
*/
public function toArray()
{
return $this->getMessages();
}
/**
* Convert the object into something JSON serializable.
*
* @return array
*/
public function jsonSerialize(): array
{
return $this->toArray();
}
/**
* Convert the object to its JSON representation.
*
* @param int $options
* @return string
*/
public function toJson($options = 0)
{
return json_encode($this->jsonSerialize(), $options);
}
/**
* Convert the message bag to its string representation.
*
* @return string
*/
public function __toString()
{
return $this->toJson();
}
}