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<?php |
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namespace League\CLImate\Argument; |
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class Parser |
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{ |
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/** |
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* Filter class to find various types of arguments |
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* |
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* @var \League\CLImate\Argument\Filter $filter |
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*/ |
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protected $filter; |
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/** |
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* Summary builder class |
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* |
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* @var \League\CLImate\Argument\Summary $summary |
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*/ |
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protected $summary; |
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protected $trailing; |
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public function __construct() |
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{ |
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$this->summary = new Summary(); |
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} |
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/** |
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* @param Filter $filter |
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* @param Argument[] $arguments |
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* |
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* @return \League\CLImate\Argument\Parser |
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*/ |
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public function setFilter($filter, $arguments) |
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{ |
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$this->filter = $filter; |
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$this->filter->setArguments($arguments); |
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return $this; |
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} |
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/** |
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* Parse command line arguments into CLImate arguments. |
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* |
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* @throws \Exception if required arguments aren't defined. |
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* @param array $argv |
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*/ |
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public function parse(array $argv = null) |
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{ |
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$cliArguments = $this->arguments($argv); |
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if (in_array('--', $cliArguments)) { |
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$cliArguments = $this->removeTrailingArguments($cliArguments); |
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} |
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$unParsedArguments = $this->prefixedArguments($cliArguments); |
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$this->nonPrefixedArguments($unParsedArguments); |
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// After parsing find out which arguments were required but not |
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// defined on the command line. |
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$missingArguments = $this->filter->missing(); |
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if (count($missingArguments) > 0) { |
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throw new \Exception( |
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'The following arguments are required: ' |
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. $this->summary->short($missingArguments) . '.' |
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); |
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} |
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} |
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/** |
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* Get the command name. |
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* |
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* @param array $argv |
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* |
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* @return string |
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*/ |
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public function command(array $argv = null) |
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{ |
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return $this->getCommandAndArguments($argv)['command']; |
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} |
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/** |
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* Get the passed arguments. |
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* |
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* @param array $argv |
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* |
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* @return array |
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*/ |
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public function arguments(array $argv = null) |
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{ |
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return $this->getCommandAndArguments($argv)['arguments']; |
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} |
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/** |
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* Get the trailing arguments |
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* |
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* @return string|null |
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*/ |
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public function trailing() |
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{ |
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return $this->trailing; |
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} |
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/** |
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* Remove the trailing arguments from the parser and set them aside |
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* |
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* @param array $arguments |
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* |
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* @return array |
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*/ |
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protected function removeTrailingArguments(array $arguments) |
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{ |
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$trailing = array_splice($arguments, array_search('--', $arguments)); |
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array_shift($trailing); |
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$this->trailing = implode(' ', $trailing); |
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return $arguments; |
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} |
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/** |
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* Parse command line options into prefixed CLImate arguments. |
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* |
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* Prefixed arguments are arguments with a prefix (-) or a long prefix (--) |
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* on the command line. |
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* |
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* Return the arguments passed on the command line that didn't match up with |
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* prefixed arguments so they can be assigned to non-prefixed arguments. |
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* |
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* @param array $argv |
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* @return array |
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*/ |
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protected function prefixedArguments(array $argv = []) |
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{ |
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foreach ($argv as $key => $passed_argument) { |
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$argv = $this->trySettingArgumentValue($argv, $key, $passed_argument); |
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} |
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// Send un-parsed arguments back upstream. |
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return array_values($argv); |
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} |
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/** |
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* Parse unset command line options into non-prefixed CLImate arguments. |
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* |
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* Non-prefixed arguments are parsed after the prefixed arguments on the |
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* command line, in the order that they're defined in the script. |
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* |
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* @param array $unParsedArguments |
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*/ |
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protected function nonPrefixedArguments(array $unParsedArguments = []) |
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{ |
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foreach ($this->filter->withoutPrefix() as $key => $argument) { |
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if (isset($unParsedArguments[$key])) { |
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$argument->setValue($unParsedArguments[$key]); |
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} |
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} |
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} |
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/** |
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* Parse the name and value of the argument passed in |
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* |
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* @param string $cliArgument |
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* @return string[] [$name, $value] |
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*/ |
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protected function getNameAndValue($cliArgument) |
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{ |
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// Look for arguments defined in the "key=value" format. |
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if (strpos($cliArgument, '=') !== false) { |
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return explode('=', $cliArgument, 2); |
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} |
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// If the argument isn't in "key=value" format then assume it's in |
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// "key value" format and define the value after we've found the |
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// matching CLImate argument. |
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return [$cliArgument, null]; |
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} |
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/** |
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* Attempt to set the an argument's value and remove applicable |
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* arguments from array |
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* |
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* @param array $argv |
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* @param int $key |
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* @param string $passed_argument |
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* |
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* @return array The new $argv |
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*/ |
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protected function trySettingArgumentValue($argv, $key, $passed_argument) |
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{ |
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list($name, $value) = $this->getNameAndValue($passed_argument); |
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// Look for the argument in our defined $arguments |
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// and assign their value. |
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if (!($argument = $this->findPrefixedArgument($name))) { |
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return $argv; |
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} |
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// We found an argument key, so take it out of the array. |
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unset($argv[$key]); |
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return $this->setArgumentValue($argv, $argument, $key, $value); |
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} |
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/** |
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* Set the argument's value |
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* |
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* @param array $argv |
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* @param Argument $argument |
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* @param int $key |
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* @param string|null $value |
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* |
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* @return array The new $argv |
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*/ |
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protected function setArgumentValue($argv, $argument, $key, $value) |
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{ |
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// Arguments are given the value true if they only need to |
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// be defined on the command line to be set. |
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if ($argument->noValue()) { |
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$argument->setValue(true); |
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return $argv; |
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} |
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if (is_null($value)) { |
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if (count($argv) === 0) { |
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return $argv; |
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} |
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// If the value wasn't previously defined in "key=value" |
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// format then define it from the next command argument. |
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$argument->setValue($argv[++$key]); |
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unset($argv[$key]); |
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return $argv; |
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} |
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$argument->setValue($value); |
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return $argv; |
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} |
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/** |
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* Search for argument in defined prefix arguments |
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* |
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* @param string $name |
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* |
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* @return Argument|false |
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*/ |
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protected function findPrefixedArgument($name) |
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{ |
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foreach ($this->filter->withPrefix() as $argument) { |
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if (in_array($name, ["-{$argument->prefix()}", "--{$argument->longPrefix()}"])) { |
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return $argument; |
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} |
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} |
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return false; |
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} |
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/** |
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* Pull a command name and arguments from $argv. |
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* |
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* @param array $argv |
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* @return array |
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*/ |
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protected function getCommandAndArguments(array $argv = null) |
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{ |
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// If no $argv is provided then use the global PHP defined $argv. |
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if (is_null($argv)) { |
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global $argv; |
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} |
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$arguments = $argv; |
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$command = array_shift($arguments); |
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return compact('arguments', 'command'); |
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} |
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} |
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