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<?php
namespace Illuminate\Validation\Concerns;
use Closure;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use Symfony\Component\HttpFoundation\File\UploadedFile;
trait FormatsMessages
{
use ReplacesAttributes;
/**
* Get the validation message for an attribute and rule.
*
* @param string $attribute
* @param string $rule
* @return string
*/
protected function getMessage($attribute, $rule)
{
$attributeWithPlaceholders = $attribute;
$attribute = $this->replacePlaceholderInString($attribute);
$inlineMessage = $this->getInlineMessage($attribute, $rule);
// First we will retrieve the custom message for the validation rule if one
// exists. If a custom validation message is being used we'll return the
// custom message, otherwise we'll keep searching for a valid message.
if (! is_null($inlineMessage)) {
return $inlineMessage;
}
$lowerRule = Str::snake($rule);
$customKey = "validation.custom.{$attribute}.{$lowerRule}";
$customMessage = $this->getCustomMessageFromTranslator(
in_array($rule, $this->sizeRules)
? [$customKey.".{$this->getAttributeType($attribute)}", $customKey]
: $customKey
);
// First we check for a custom defined validation message for the attribute
// and rule. This allows the developer to specify specific messages for
// only some attributes and rules that need to get specially formed.
if ($customMessage !== $customKey) {
return $customMessage;
}
// If the rule being validated is a "size" rule, we will need to gather the
// specific error message for the type of attribute being validated such
// as a number, file or string which all have different message types.
elseif (in_array($rule, $this->sizeRules)) {
return $this->getSizeMessage($attributeWithPlaceholders, $rule);
}
// Finally, if no developer specified messages have been set, and no other
// special messages apply for this rule, we will just pull the default
// messages out of the translator service for this validation rule.
$key = "validation.{$lowerRule}";
if ($key !== ($value = $this->translator->get($key))) {
return $value;
}
return $this->getFromLocalArray(
$attribute, $lowerRule, $this->fallbackMessages
) ?: $key;
}
/**
* Get the proper inline error message for standard and size rules.
*
* @param string $attribute
* @param string $rule
* @return string|null
*/
protected function getInlineMessage($attribute, $rule)
{
$inlineEntry = $this->getFromLocalArray($attribute, Str::snake($rule));
return is_array($inlineEntry) && in_array($rule, $this->sizeRules)
? $inlineEntry[$this->getAttributeType($attribute)]
: $inlineEntry;
}
/**
* Get the inline message for a rule if it exists.
*
* @param string $attribute
* @param string $lowerRule
* @param array|null $source
* @return string|null
*/
protected function getFromLocalArray($attribute, $lowerRule, $source = null)
{
$source = $source ?: $this->customMessages;
$keys = ["{$attribute}.{$lowerRule}", $lowerRule, $attribute];
// First we will check for a custom message for an attribute specific rule
// message for the fields, then we will check for a general custom line
// that is not attribute specific. If we find either we'll return it.
foreach ($keys as $key) {
foreach (array_keys($source) as $sourceKey) {
if (str_contains($sourceKey, '*')) {
$pattern = str_replace('\*', '([^.]*)', preg_quote($sourceKey, '#'));
if (preg_match('#^'.$pattern.'\z#u', $key) === 1) {
$message = $source[$sourceKey];
if (is_array($message) && isset($message[$lowerRule])) {
return $message[$lowerRule];
}
return $message;
}
continue;
}
if (Str::is($sourceKey, $key)) {
$message = $source[$sourceKey];
if ($sourceKey === $attribute && is_array($message) && isset($message[$lowerRule])) {
return $message[$lowerRule];
}
return $message;
}
}
}
}
/**
* Get the custom error message from the translator.
*
* @param array|string $keys
* @return string
*/
protected function getCustomMessageFromTranslator($keys)
{
foreach (Arr::wrap($keys) as $key) {
if (($message = $this->translator->get($key)) !== $key) {
return $message;
}
// If an exact match was not found for the key, we will collapse all of these
// messages and loop through them and try to find a wildcard match for the
// given key. Otherwise, we will simply return the key's value back out.
$shortKey = preg_replace(
'/^validation\.custom\./', '', $key
);
$message = $this->getWildcardCustomMessages(Arr::dot(
(array) $this->translator->get('validation.custom')
), $shortKey, $key);
if ($message !== $key) {
return $message;
}
}
return Arr::last(Arr::wrap($keys));
}
/**
* Check the given messages for a wildcard key.
*
* @param array $messages
* @param string $search
* @param string $default
* @return string
*/
protected function getWildcardCustomMessages($messages, $search, $default)
{
foreach ($messages as $key => $message) {
if ($search === $key || (Str::contains($key, ['*']) && Str::is($key, $search))) {
return $message;
}
}
return $default;
}
/**
* Get the proper error message for an attribute and size rule.
*
* @param string $attribute
* @param string $rule
* @return string
*/
protected function getSizeMessage($attribute, $rule)
{
$lowerRule = Str::snake($rule);
// There are three different types of size validations. The attribute may be
// either a number, file, or string so we will check a few things to know
// which type of value it is and return the correct line for that type.
$type = $this->getAttributeType($attribute);
$key = "validation.{$lowerRule}.{$type}";
return $this->translator->get($key);
}
/**
* Get the data type of the given attribute.
*
* @param string $attribute
* @return string
*/
protected function getAttributeType($attribute)
{
// We assume that the attributes present in the file array are files so that
// means that if the attribute does not have a numeric rule and the files
// list doesn't have it we'll just consider it a string by elimination.
if ($this->hasRule($attribute, $this->numericRules)) {
return 'numeric';
} elseif ($this->hasRule($attribute, ['Array'])) {
return 'array';
} elseif ($this->getValue($attribute) instanceof UploadedFile) {
return 'file';
}
return 'string';
}
/**
* Replace all error message place-holders with actual values.
*
* @param string $message
* @param string $attribute
* @param string $rule
* @param array $parameters
* @return string
*/
public function makeReplacements($message, $attribute, $rule, $parameters)
{
$message = $this->replaceAttributePlaceholder(
$message, $this->getDisplayableAttribute($attribute)
);
$message = $this->replaceInputPlaceholder($message, $attribute);
$message = $this->replaceIndexPlaceholder($message, $attribute);
$message = $this->replacePositionPlaceholder($message, $attribute);
if (isset($this->replacers[Str::snake($rule)])) {
return $this->callReplacer($message, $attribute, Str::snake($rule), $parameters, $this);
} elseif (method_exists($this, $replacer = "replace{$rule}")) {
return $this->$replacer($message, $attribute, $rule, $parameters);
}
return $message;
}
/**
* Get the displayable name of the attribute.
*
* @param string $attribute
* @return string
*/
public function getDisplayableAttribute($attribute)
{
$primaryAttribute = $this->getPrimaryAttribute($attribute);
$expectedAttributes = $attribute != $primaryAttribute
? [$attribute, $primaryAttribute] : [$attribute];
foreach ($expectedAttributes as $name) {
// The developer may dynamically specify the array of custom attributes on this
// validator instance. If the attribute exists in this array it is used over
// the other ways of pulling the attribute name for this given attributes.
if (isset($this->customAttributes[$name])) {
return $this->customAttributes[$name];
}
// We allow for a developer to specify language lines for any attribute in this
// application, which allows flexibility for displaying a unique displayable
// version of the attribute name instead of the name used in an HTTP POST.
if ($line = $this->getAttributeFromTranslations($name)) {
return $line;
}
}
// When no language line has been specified for the attribute and it is also
// an implicit attribute we will display the raw attribute's name and not
// modify it with any of these replacements before we display the name.
if (isset($this->implicitAttributes[$primaryAttribute])) {
return ($formatter = $this->implicitAttributesFormatter)
? $formatter($attribute)
: $attribute;
}
return str_replace('_', ' ', Str::snake($attribute));
}
/**
* Get the given attribute from the attribute translations.
*
* @param string $name
* @return string
*/
protected function getAttributeFromTranslations($name)
{
return Arr::get($this->translator->get('validation.attributes'), $name);
}
/**
* Replace the :attribute placeholder in the given message.
*
* @param string $message
* @param string $value
* @return string
*/
protected function replaceAttributePlaceholder($message, $value)
{
return str_replace(
[':attribute', ':ATTRIBUTE', ':Attribute'],
[$value, Str::upper($value), Str::ucfirst($value)],
$message
);
}
/**
* Replace the :index placeholder in the given message.
*
* @param string $message
* @param string $attribute
* @return string
*/
protected function replaceIndexPlaceholder($message, $attribute)
{
return $this->replaceIndexOrPositionPlaceholder(
$message, $attribute, 'index'
);
}
/**
* Replace the :position placeholder in the given message.
*
* @param string $message
* @param string $attribute
* @return string
*/
protected function replacePositionPlaceholder($message, $attribute)
{
return $this->replaceIndexOrPositionPlaceholder(
$message, $attribute, 'position', fn ($segment) => $segment + 1
);
}
/**
* Replace the :index or :position placeholder in the given message.
*
* @param string $message
* @param string $attribute
* @param string $placeholder
* @param \Closure|null $modifier
* @return string
*/
protected function replaceIndexOrPositionPlaceholder($message, $attribute, $placeholder, Closure $modifier = null)
{
$segments = explode('.', $attribute);
$modifier ??= fn ($value) => $value;
$numericIndex = 1;
foreach ($segments as $segment) {
if (is_numeric($segment)) {
if ($numericIndex === 1) {
$message = str_ireplace(':'.$placeholder, $modifier((int) $segment), $message);
}
$message = str_ireplace(
':'.$this->numberToIndexOrPositionWord($numericIndex).'-'.$placeholder,
$modifier((int) $segment),
$message
);
$numericIndex++;
}
}
return $message;
}
/**
* Get the word for a index or position segment.
*
* @param int $value
* @return string
*/
protected function numberToIndexOrPositionWord(int $value)
{
return [
1 => 'first',
2 => 'second',
3 => 'third',
4 => 'fourth',
5 => 'fifth',
6 => 'sixth',
7 => 'seventh',
8 => 'eighth',
9 => 'ninth',
10 => 'tenth',
][(int) $value] ?? 'other';
}
/**
* Replace the :input placeholder in the given message.
*
* @param string $message
* @param string $attribute
* @return string
*/
protected function replaceInputPlaceholder($message, $attribute)
{
$actualValue = $this->getValue($attribute);
if (is_scalar($actualValue) || is_null($actualValue)) {
$message = str_replace(':input', $this->getDisplayableValue($attribute, $actualValue), $message);
}
return $message;
}
/**
* Get the displayable name of the value.
*
* @param string $attribute
* @param mixed $value
* @return string
*/
public function getDisplayableValue($attribute, $value)
{
if (isset($this->customValues[$attribute][$value])) {
return $this->customValues[$attribute][$value];
}
$key = "validation.values.{$attribute}.{$value}";
if (($line = $this->translator->get($key)) !== $key) {
return $line;
}
if (is_bool($value)) {
return $value ? 'true' : 'false';
}
if (is_null($value)) {
return 'empty';
}
return (string) $value;
}
/**
* Transform an array of attributes to their displayable form.
*
* @param array $values
* @return array
*/
protected function getAttributeList(array $values)
{
$attributes = [];
// For each attribute in the list we will simply get its displayable form as
// this is convenient when replacing lists of parameters like some of the
// replacement functions do when formatting out the validation message.
foreach ($values as $key => $value) {
$attributes[$key] = $this->getDisplayableAttribute($value);
}
return $attributes;
}
/**
* Call a custom validator message replacer.
*
* @param string $message
* @param string $attribute
* @param string $rule
* @param array $parameters
* @param \Illuminate\Validation\Validator $validator
* @return string|null
*/
protected function callReplacer($message, $attribute, $rule, $parameters, $validator)
{
$callback = $this->replacers[$rule];
if ($callback instanceof Closure) {
return $callback(...func_get_args());
} elseif (is_string($callback)) {
return $this->callClassBasedReplacer($callback, $message, $attribute, $rule, $parameters, $validator);
}
}
/**
* Call a class based validator message replacer.
*
* @param string $callback
* @param string $message
* @param string $attribute
* @param string $rule
* @param array $parameters
* @param \Illuminate\Validation\Validator $validator
* @return string
*/
protected function callClassBasedReplacer($callback, $message, $attribute, $rule, $parameters, $validator)
{
[$class, $method] = Str::parseCallback($callback, 'replace');
return $this->container->make($class)->{$method}(...array_slice(func_get_args(), 1));
}
}
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