calculator.php
4f9915ecac81stable

calculator.php
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			#!/usr/bin/env php
			<?php

			require_once dirname(dirname(__FILE__)).'/__init_script__.php';

			$args = new PhutilArgumentParser($argv);
			$args->setTagline('simple calculator example');
			$args->setSynopsis(<<<EOHELP
			calculator.php __op__ __n__ ...
			Perform a calculation.
			EOHELP
			);

			$add_workflow = id(new PhutilArgumentWorkflow())
			->setName('add')
			->setExamples('add __n__ ...')
			->setSynopsis('Compute the sum of a list of numbers.')
			->setArguments(
			array(
			array(
			'name' => 'numbers',
			'wildcard' => true,
			),
			));

			$mul_workflow = id(new PhutilArgumentWorkflow())
			->setName('mul')
			->setExamples('mul __n__ ...')
			->setSynopsis('Compute the product of a list of numbers.')
			->setArguments(
			array(
			array(
			'name' => 'numbers',
			'wildcard' => true,
			),
			));

			$flow = $args->parseWorkflows(
			array(
			$add_workflow,
			$mul_workflow,
			new PhutilHelpArgumentWorkflow(),
			));

			$nums = $args->getArg('numbers');
			if (empty($nums)) {
			echo "You must provide one or more numbers!\n";
			exit(1);
			}

			foreach ($nums as $num) {
			if (!is_numeric($num)) {
			echo "Number '{$num}' is not numeric!\n";
			exit(1);
			}
			}

			switch ($flow->getName()) {
			case 'add':
			echo array_sum($nums)."\n";
			break;
			case 'mul':
			echo array_product($nums)."\n";
			break;
			}