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<?php |
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namespace clearice\argparser; |
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class ArgumentParser |
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{ |
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private $description; |
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private $footer; |
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private $options = []; |
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public function setDescription($description) |
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{ |
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$this->description = $description; |
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} |
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public function setFooter($footer) |
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{ |
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$this->footer = $footer; |
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} |
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/** |
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* Add a value to the available possible options for later parsing. |
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* @param $key |
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* @param $value |
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* @throws OptionExistsException |
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*/ |
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private function addToOptionArray($key, $value) |
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{ |
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if(isset($value[$key]) && !isset($this->options[$value[$key]])) { |
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$this->options[$value[$key]] = $value; |
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} else if(isset($value[$key])) { |
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throw new OptionExistsException("An argument option with $key {$value[$key]} already exists."); |
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} |
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} |
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/** |
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* Add an option to be parsed. |
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* Arguments are presented as a structured array with the following possible keys. |
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* |
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* name: The name of the option prefixed with a double dash -- |
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* short_name: A shorter single character option prefixed with a single dash - |
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* type: Required for all options that take values. An option specified without a type is considered to be a |
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* boolean flag. |
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* help: A help message for the option |
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* |
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* @param $option |
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* @throws OptionExistsException |
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* @throws InvalidArgumentDescriptionException |
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*/ |
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public function addOption($option) |
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{ |
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if(!isset($option['name'])) { |
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throw new InvalidArgumentDescriptionException("Argument must have a name"); |
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} |
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$this->addToOptionArray('name', $option); |
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$this->addToOptionArray('short_name', $option); |
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} |
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private function getNextValueOrFail($arguments, &$argPointer) |
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{ |
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if (isset($arguments[$argPointer + 1]) && $arguments[$argPointer + 1][0] != '-') { |
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$argPointer++; |
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return $arguments[$argPointer]; |
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} else { |
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throw new InvalidValueException("A value must be passed along with argument $name."); |
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} |
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} |
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/** |
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* Parse a long argument that is prefixed with a double dash "--" |
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* |
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* @param $arguments |
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* @param $argPointer |
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* @return array |
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* @throws InvalidValueException |
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*/ |
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private function parseLongArgument($arguments, &$argPointer) |
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{ |
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$string = substr($arguments[$argPointer], 2); |
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preg_match("/(?<name>[a-zA-Z_0-9-]+)(?<equal>=?)(?<value>.*)/", $string, $matches); |
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$name = $matches['name']; |
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$option = $this->options[$name]; |
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$value = true; |
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if(isset($option['type'])) { |
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if($matches['equal'] === '=') { |
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$value = $matches['value']; |
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} else { |
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$value = $this->getNextValueOrFail($arguments, $argPointer); |
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} |
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} |
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return [$name => $value]; |
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} |
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/** |
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* Parse a short argument that is prefixed with a single dash '-' |
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* |
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* @param $arguments |
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* @param $argPointer |
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* @return array |
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* @throws InvalidValueException |
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*/ |
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public function parseShortArgument($arguments, &$argPointer) |
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{ |
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$argument = $arguments[$argPointer]; |
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$key = substr($argument, 1, 1); |
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$option = $this->options[$key]; |
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$value = true; |
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if(isset($option['type'])) { |
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if(substr($argument, 2) != "") { |
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$value = substr($argument, 2); |
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} else { |
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$value = $this->getNextValueOrFail($arguments, $argPointer); |
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} |
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} |
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return [$option['name'] => $value]; |
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} |
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/** |
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* Parses command line arguments and return a structured array of options and their associated values. |
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* |
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* @param array $arguments An optional array of arguments that would be parsed instead of those passed to the CLI. |
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* @return array |
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* @throws InvalidValueException |
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*/ |
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public function parse($arguments = null) |
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{ |
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global $argv; |
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$arguments = $arguments ?? $argv; |
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$numArguments = count($arguments); |
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$output = []; |
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for($argPointer = 1; $argPointer < $numArguments; $argPointer++) { |
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$arg = $arguments[$argPointer]; |
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if(substr($arg, 0, 2) == "--") { |
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$output = array_merge($output, $this->parseLongArgument($arguments, $argPointer)); |
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} else if ($arg[0] == '-') { |
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$output = array_merge($output, $this->parseShortArgument($arguments, $argPointer)); |
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} else { |
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$output['__args'] = isset($output['__args']) ? array_merge($output['__args'], [$arg]) : [$arg]; |
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} |
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} |
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return $output; |
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} |
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public function getHelp() |
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{ |
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} |
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} |
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ekowabaka /
clearice
