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<?php
namespace Net\Bazzline\Component\Cli\Environment;
use Exception;
use InvalidArgumentException;
use Net\Bazzline\Component\Cli\Arguments\Arguments;
use Net\Bazzline\Component\Toolbox\Scalar\Text;
class CommandLineEnvironment
{
private $arguments;
private $beVerbose;
private $executeExceptionHandler;
private $text;
public function __construct($argv)
{
$this->arguments = new Arguments($argv);
$this->text = new Text();
$this->determineIfWeAreVerbose($this->arguments);
$this->setDefaultExecuteExceptionHandler();
}
public function beVerbose()
{
return $this->beVerbose;
}
public function execute($instruction, $usage)
{
try {
$this->throwInvalidArgumentExceptionIfNoCallableProvided($instruction);
$instruction($this);
} catch (Exception $exception) {
$handler = $this->executeExceptionHandler;
$handler($exception, $usage);
}
}
public function getArguments()
{
return $this->arguments;
}
public function getText()
{
return $this->text;
}
public function overwriteDefaultExecuteExceptionHandler($handler)
{
$this->throwInvalidArgumentExceptionIfNoCallableProvided($handler);
$this->executeExceptionHandler = $handler;
}
public function output($scalarOrArrayOfScalars)
{
if (is_scalar($scalarOrArrayOfScalars)) {
$scalarOrArrayOfScalars = [
$scalarOrArrayOfScalars
];
}
if (!is_array($scalarOrArrayOfScalars)) {
throw new InvalidArgumentException(
'provided argument must be scalar or array'
);
}
echo implode(PHP_EOL, $scalarOrArrayOfScalars) . PHP_EOL;
}
public function outputIfVerbosityIsEnabled($scalarOrArrayOfScalars)
{
if ($this->beVerbose) {
$this->output($scalarOrArrayOfScalars);
}
}
private function determineIfWeAreVerbose(Arguments $arguments)
{
$this->beVerbose = ($arguments->hasFlag('verbose') || $arguments->hasFlag('v'));
}
private function setDefaultExecuteExceptionHandler()
{
$environment = $this;
$this->executeExceptionHandler = function (Exception $exception, $usage) use ($environment) {
$environment->output(
[
'An error occurred',
$exception->getMessage(),
'',
'Usage: ' . $usage
]
);
exit(1);
};
}
private function throwInvalidArgumentExceptionIfNoCallableProvided($callable)
{
if (!is_callable($callable)) {
throw new InvalidArgumentException(
'no callable provided'
);
}
}
}