move_beneath.php
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	epriestley
	Feb 13 2016, 1:23 PM

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

	// See <https://secure.phabricator.com/T10350> for discussion.

	require_once 'scripts/__init_script__.php';

	$args = new PhutilArgumentParser($argv);
	$args->parseStandardArguments();
	$args->parse(
	array(
	array(
	'name' => 'milestone',
	'help' => pht(
	'Turn the project into a milestone. Or, use --subproject.'),
	),
	array(
	'name' => 'child',
	'param' => 'project',
	'help' => pht('The project to make a child of the --parent project.'),
	),
	array(
	'name' => 'parent',
	'param' => 'project',
	'help' => pht('The project to make a parent of the --child project.'),
	),
	array(
	'name' => 'subproject',
	'help' => pht(
	'Turn the project into a subproject. Or, use --milestone.'),
	),
	array(
	'name' => 'keep-members',
	'param' => 'mode',
	'help' => pht('Choose which members to keep: both, child, parent.'),
	),
	));


	$parent_name = $args->getArg('parent');
	$child_name = $args->getArg('child');

	if (!$parent_name) {
	throw new PhutilArgumentUsageException(
	pht(
	'Choose which project should become the parent with --parent.'));
	}

	if (!$child_name) {
	throw new PhutilArgumentUsageException(
	pht(
	'Choose which project should become the child with --child.'));
	}

	$keep_members = $args->getArg('keep-members');
	switch ($keep_members) {
	case 'both':
	case 'child':
	case 'parent':
	break;
	default:
	if (!$keep_members) {
	throw new PhutilArgumentUsageException(
	pht(
	'Choose which members to keep with --keep-members.'));
	} else {
	throw new PhutilArgumentUsageException(
	pht(
	'Valid --keep-members settings are: both, child, parent.'));
	}
	}

	$want_milestone = $args->getArg('milestone');
	$want_subproject = $args->getArg('subproject');
	if (!$want_milestone && !$want_subproject) {
	throw new PhutilArgumentUsageException(
	pht(
	'Use --milestone or --subproject to select what kind of child the '.
	'project should become.'));
	} else if ($want_milestone && $want_subproject) {
	throw new PhutilArgumentUsageException(
	pht(
	'Use either --milestone or --subproject, not both, to select what kind '.
	'of project the child should become.'));
	}
	$is_milestone = $want_milestone;

	$parent = load_project($parent_name);
	$child = load_project($child_name);

	if ($parent->isMilestone()) {
	throw new PhutilArgumentUsageException(
	pht(
	'The selected parent project is a milestone, and milestones may '.
	'not have children.'));
	}

	if ($child->getParentProjectPHID()) {
	throw new PhutilArgumentUsageException(
	pht(
	'The selected child project is already a child of another project. '.
	'This script can only move root-level projects beneath other projects, '.
	'not move children within a hierarchy.'));
	}

	if ($child->getHasSubprojects() \|\| $child->getHasMilestones()) {
	throw new PhutilArgumentUsageException(
	pht(
	'The selected child project already has subprojects or milestones '.
	'of its own. This script can not move entire trees of projects.'));
	}

	if ($parent->getPHID() == $child->getPHID()) {
	throw new PhutilArgumentUsageException(
	pht(
	'The parent and child are the same project. There is no conceivable '.
	'physical interpretation of what you are attempting to do.'));
	}


	if ($is_milestone) {
	if (($keep_members != 'parent') && $parent->getHasSubprojects()) {
	throw new PhutilArgumentUsageException(
	pht(
	'You can not use "child" or "both" modes when making a project a '.
	'milestone of a project with existing subprojects: there is nowhere '.
	'to put the members.'));
	}

	$copy_parent = false;
	$copy_child = ($keep_members != 'parent');
	$wipe_parent = ($keep_members == 'child');
	$wipe_child = true;
	} else {
	$copy_parent = ($keep_members != 'child');
	$copy_child = false;
	$wipe_parent = true;
	$wipe_child = ($keep_members == 'parent');
	}

	$child->setParentProjectPHID($parent->getPHID());
	$child->attachParentProject($parent);

	if ($is_milestone) {
	$next_number = $parent->loadNextMilestoneNumber();
	$child->setMilestoneNumber($next_number);
	}

	$child->save();

	$member_type = PhabricatorProjectProjectHasMemberEdgeType::EDGECONST;

	$parent_members = PhabricatorEdgeQuery::loadDestinationPHIDs(
	$parent->getPHID(),
	$member_type);

	$child_members = PhabricatorEdgeQuery::loadDestinationPHIDs(
	$child->getPHID(),
	$member_type);

	if ($copy_parent) {
	edit_members($parent_members, $child, true);
	}

	if ($copy_child) {
	edit_members($child_members, $parent, true);
	}

	if ($wipe_parent) {
	edit_members($parent_members, $parent, false);
	}

	if ($wipe_child) {
	edit_members($child_members, $child, false);
	}

	id(new PhabricatorProjectsMembershipIndexEngineExtension())
	->rematerialize($parent);

	id(new PhabricatorProjectsMembershipIndexEngineExtension())
	->rematerialize($child);

	echo tsprintf(
	"%s\n",
	pht('Done.'));


	function load_project($name) {
	$viewer = PhabricatorUser::getOmnipotentUser();

	$project = id(new PhabricatorProjectQuery())
	->setViewer($viewer)
	->withSlugs(array($name))
	->executeOne();
	if ($project) {
	return $project;
	}

	$project = id(new PhabricatorProjectQuery())
	->setViewer($viewer)
	->withPHIDs(array($name))
	->executeOne();
	if ($project) {
	return $project;
	}

	$project = id(new PhabricatorProjectQuery())
	->setViewer($viewer)
	->withIDs(array($name))
	->executeOne();
	if ($project) {
	return $project;
	}

	throw new Exception(
	pht(
	'Unknown project "%s"! Use a hashtags, PHID, or ID to choose a project.',
	$name));
	}

	function edit_members(array $phids, PhabricatorProject $target, $add) {
	if (!$phids) {
	return;
	}

	$member_type = PhabricatorProjectProjectHasMemberEdgeType::EDGECONST;

	$editor = id(new PhabricatorEdgeEditor());
	foreach ($phids as $phid) {
	if ($add) {
	$editor->addEdge($target->getPHID(), $member_type, $phid);
	} else {
	$editor->removeEdge($target->getPHID(), $member_type, $phid);
	}
	}
	$editor->save();
	}

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