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<?php
namespace Intervention\Image\Commands;
use Intervention\Image\Exception\InvalidArgumentException;
class Argument
{
/**
* Command with arguments
*
* @var AbstractCommand
*/
public $command;
/**
* Key of argument in array
*
* @var int
*/
public $key;
/**
* Creates new instance from given command and key
*
* @param AbstractCommand $command
* @param int $key
*/
public function __construct(AbstractCommand $command, $key = 0)
{
$this->command = $command;
$this->key = $key;
}
/**
* Returns name of current arguments command
*
* @return string
*/
public function getCommandName()
{
preg_match("/\\\\([\w]+)Command$/", get_class($this->command), $matches);
return isset($matches[1]) ? lcfirst($matches[1]).'()' : 'Method';
}
/**
* Returns value of current argument
*
* @param mixed $default
* @return mixed
*/
public function value($default = null)
{
$arguments = $this->command->arguments;
if (is_array($arguments)) {
return isset($arguments[$this->key]) ? $arguments[$this->key] : $default;
}
return $default;
}
/**
* Defines current argument as required
*
* @return \Intervention\Image\Commands\Argument
*/
public function required()
{
if ( ! array_key_exists($this->key, $this->command->arguments)) {
throw new InvalidArgumentException(
sprintf("Missing argument %d for %s", $this->key + 1, $this->getCommandName())
);
}
return $this;
}
/**
* Determines that current argument must be of given type
*
* @return \Intervention\Image\Commands\Argument
*/
public function type($type)
{
$valid = true;
$value = $this->value();
if ($value === null) {
return $this;
}
switch (strtolower($type)) {
case 'bool':
case 'boolean':
$valid = \is_bool($value);
$message = '%s accepts only boolean values as argument %d.';
break;
case 'int':
case 'integer':
$valid = \is_int($value);
$message = '%s accepts only integer values as argument %d.';
break;
case 'num':
case 'numeric':
$valid = is_numeric($value);
$message = '%s accepts only numeric values as argument %d.';
break;
case 'str':
case 'string':
$valid = \is_string($value);
$message = '%s accepts only string values as argument %d.';
break;
case 'array':
$valid = \is_array($value);
$message = '%s accepts only array as argument %d.';
break;
case 'closure':
$valid = is_a($value, '\Closure');
$message = '%s accepts only Closure as argument %d.';
break;
case 'digit':
$valid = $this->isDigit($value);
$message = '%s accepts only integer values as argument %d.';
break;
}
if (! $valid) {
$commandName = $this->getCommandName();
$argument = $this->key + 1;
if (isset($message)) {
$message = sprintf($message, $commandName, $argument);
} else {
$message = sprintf('Missing argument for %d.', $argument);
}
throw new InvalidArgumentException(
$message
);
}
return $this;
}
/**
* Determines that current argument value must be numeric between given values
*
* @return \Intervention\Image\Commands\Argument
*/
public function between($x, $y)
{
$value = $this->type('numeric')->value();
if (is_null($value)) {
return $this;
}
$alpha = min($x, $y);
$omega = max($x, $y);
if ($value < $alpha || $value > $omega) {
throw new InvalidArgumentException(
sprintf('Argument %d must be between %s and %s.', $this->key, $x, $y)
);
}
return $this;
}
/**
* Determines that current argument must be over a minimum value
*
* @return \Intervention\Image\Commands\Argument
*/
public function min($value)
{
$v = $this->type('numeric')->value();
if (is_null($v)) {
return $this;
}
if ($v < $value) {
throw new InvalidArgumentException(
sprintf('Argument %d must be at least %s.', $this->key, $value)
);
}
return $this;
}
/**
* Determines that current argument must be under a maxiumum value
*
* @return \Intervention\Image\Commands\Argument
*/
public function max($value)
{
$v = $this->type('numeric')->value();
if (is_null($v)) {
return $this;
}
if ($v > $value) {
throw new InvalidArgumentException(
sprintf('Argument %d may not be greater than %s.', $this->key, $value)
);
}
return $this;
}
/**
* Checks if value is "PHP" integer (120 but also 120.0)
*
* @param mixed $value
* @return boolean
*/
private function isDigit($value)
{
return is_numeric($value) ? intval($value) == $value : false;
}
}