ArcanistDownloadWorkflow.php
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	<?php

	/*
	* Copyright 2012 Facebook, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	/**
	* Download a file from Phabricator.
	*
	* @group workflow
	*/
	final class ArcanistDownloadWorkflow extends ArcanistBaseWorkflow {

	private $id;
	private $saveAs;
	private $show;

	public function getWorkflowName() {
	return 'download';
	}

	public function getCommandSynopses() {
	return phutil_console_format(<<<EOTEXT
	download __file__ [--as __name__] [--show]
	EOTEXT
	);
	}

	public function getCommandHelp() {
	return phutil_console_format(<<<EOTEXT
	Supports: filesystems
	Download a file to local disk, e.g.:

	$ arc download F33 # Download file 'F33'
	EOTEXT
	);
	}

	public function getArguments() {
	return array(
	'show' => array(
	'conflicts' => array(
	'as' => 'Use --show to direct the file to stdout, or --as to direct '.
	'it to a named location.',
	),
	'help' => 'Write file to stdout instead of to disk.',
	),
	'as' => array(
	'param' => 'name',
	'help' => 'Save the file with a specific name rather than the default.',
	),
	'*' => 'argv',
	);
	}

	protected function didParseArguments() {
	$argv = $this->getArgument('argv');
	if (!$argv) {
	throw new ArcanistUsageException("Specify a file to download.");
	}
	if (count($argv) > 1) {
	throw new ArcanistUsageException("Specify exactly one file to download.");
	}

	$file = reset($argv);
	if (!preg_match('/^F?\d+$/', $file)) {
	throw new ArcanistUsageException("Specify file by ID, e.g. F123.");
	}

	$this->id = (int)ltrim($file, 'F');
	$this->saveAs = $this->getArgument('as');
	$this->show = $this->getArgument('show');
	}

	public function requiresAuthentication() {
	return true;
	}

	public function run() {

	$conduit = $this->getConduit();

	$this->writeStatusMessage("Getting file information...\n");
	$info = $conduit->callMethodSynchronous(
	'file.info',
	array(
	'id' => $this->id,
	));

	$bytes = number_format($info['byteSize']);
	$desc = '('.$bytes.' bytes)';
	if ($info['name']) {
	$desc = "'".$info['name']."' ".$desc;
	}

	$this->writeStatusMessage("Downloading file {$desc}...\n");
	$data = $conduit->callMethodSynchronous(
	'file.download',
	array(
	'phid' => $info['phid'],
	));

	$data = base64_decode($data);

	if ($this->show) {
	echo $data;
	} else {
	$path = Filesystem::writeUniqueFile(
	nonempty($this->saveAs, $info['name'], 'file'),
	$data);
	$this->writeStatusMessage("Saved file as '{$path}'.\n");
	}

	return 0;
	}

	}

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