DifferentialDiff.php
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Created: Sat, Jan 25, 19:53

DifferentialDiff.php
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	<?php

	final class DifferentialDiff
	extends DifferentialDAO
	implements
	PhabricatorPolicyInterface,
	PhabricatorExtendedPolicyInterface,
	HarbormasterBuildableInterface,
	HarbormasterCircleCIBuildableInterface,
	PhabricatorApplicationTransactionInterface,
	PhabricatorDestructibleInterface {

	protected $revisionID;
	protected $authorPHID;
	protected $repositoryPHID;
	protected $commitPHID;

	protected $sourceMachine;
	protected $sourcePath;

	protected $sourceControlSystem;
	protected $sourceControlBaseRevision;
	protected $sourceControlPath;

	protected $lintStatus;
	protected $unitStatus;

	protected $lineCount;

	protected $branch;
	protected $bookmark;

	protected $creationMethod;
	protected $repositoryUUID;

	protected $description;

	protected $viewPolicy;

	private $unsavedChangesets = array();
	private $changesets = self::ATTACHABLE;
	private $revision = self::ATTACHABLE;
	private $properties = array();
	private $buildable = self::ATTACHABLE;

	private $unitMessages = self::ATTACHABLE;

	protected function getConfiguration() {
	return array(
	self::CONFIG_AUX_PHID => true,
	self::CONFIG_COLUMN_SCHEMA => array(
	'revisionID' => 'id?',
	'authorPHID' => 'phid?',
	'repositoryPHID' => 'phid?',
	'sourceMachine' => 'text255?',
	'sourcePath' => 'text255?',
	'sourceControlSystem' => 'text64?',
	'sourceControlBaseRevision' => 'text255?',
	'sourceControlPath' => 'text255?',
	'lintStatus' => 'uint32',
	'unitStatus' => 'uint32',
	'lineCount' => 'uint32',
	'branch' => 'text255?',
	'bookmark' => 'text255?',
	'repositoryUUID' => 'text64?',
	'commitPHID' => 'phid?',

	// T6203/NULLABILITY
	// These should be non-null; all diffs should have a creation method
	// and the description should just be empty.
	'creationMethod' => 'text255?',
	'description' => 'text255?',
	),
	self::CONFIG_KEY_SCHEMA => array(
	'revisionID' => array(
	'columns' => array('revisionID'),
	),
	'key_commit' => array(
	'columns' => array('commitPHID'),
	),
	),
	) + parent::getConfiguration();
	}

	public function generatePHID() {
	return PhabricatorPHID::generateNewPHID(
	DifferentialDiffPHIDType::TYPECONST);
	}

	public function addUnsavedChangeset(DifferentialChangeset $changeset) {
	if ($this->changesets === null) {
	$this->changesets = array();
	}
	$this->unsavedChangesets[] = $changeset;
	$this->changesets[] = $changeset;
	return $this;
	}

	public function attachChangesets(array $changesets) {
	assert_instances_of($changesets, 'DifferentialChangeset');
	$this->changesets = $changesets;
	return $this;
	}

	public function getChangesets() {
	return $this->assertAttached($this->changesets);
	}

	public function loadChangesets() {
	if (!$this->getID()) {
	return array();
	}
	$changesets = id(new DifferentialChangeset())->loadAllWhere(
	'diffID = %d',
	$this->getID());

	foreach ($changesets as $changeset) {
	$changeset->attachDiff($this);
	}

	return $changesets;
	}

	public function save() {
	$this->openTransaction();
	$ret = parent::save();
	foreach ($this->unsavedChangesets as $changeset) {
	$changeset->setDiffID($this->getID());
	$changeset->save();
	}
	$this->saveTransaction();
	return $ret;
	}

	public static function initializeNewDiff(PhabricatorUser $actor) {
	$app = id(new PhabricatorApplicationQuery())
	->setViewer($actor)
	->withClasses(array('PhabricatorDifferentialApplication'))
	->executeOne();
	$view_policy = $app->getPolicy(
	DifferentialDefaultViewCapability::CAPABILITY);

	$diff = id(new DifferentialDiff())
	->setViewPolicy($view_policy);

	return $diff;
	}

	public static function newFromRawChanges(
	PhabricatorUser $actor,
	array $changes) {

	assert_instances_of($changes, 'ArcanistDiffChange');

	$diff = self::initializeNewDiff($actor);
	return self::buildChangesetsFromRawChanges($diff, $changes);
	}

	public static function newEphemeralFromRawChanges(array $changes) {
	assert_instances_of($changes, 'ArcanistDiffChange');

	$diff = id(new DifferentialDiff())->makeEphemeral();
	return self::buildChangesetsFromRawChanges($diff, $changes);
	}

	private static function buildChangesetsFromRawChanges(
	DifferentialDiff $diff,
	array $changes) {

	// There may not be any changes; initialize the changesets list so that
	// we don't throw later when accessing it.
	$diff->attachChangesets(array());

	$lines = 0;
	foreach ($changes as $change) {
	if ($change->getType() == ArcanistDiffChangeType::TYPE_MESSAGE) {
	// If a user pastes a diff into Differential which includes a commit
	// message (e.g., they ran `git show` to generate it), discard that
	// change when constructing a DifferentialDiff.
	continue;
	}

	$changeset = new DifferentialChangeset();
	$add_lines = 0;
	$del_lines = 0;
	$first_line = PHP_INT_MAX;
	$hunks = $change->getHunks();
	if ($hunks) {
	foreach ($hunks as $hunk) {
	$dhunk = new DifferentialModernHunk();
	$dhunk->setOldOffset($hunk->getOldOffset());
	$dhunk->setOldLen($hunk->getOldLength());
	$dhunk->setNewOffset($hunk->getNewOffset());
	$dhunk->setNewLen($hunk->getNewLength());
	$dhunk->setChanges($hunk->getCorpus());
	$changeset->addUnsavedHunk($dhunk);
	$add_lines += $hunk->getAddLines();
	$del_lines += $hunk->getDelLines();
	$added_lines = $hunk->getChangedLines('new');
	if ($added_lines) {
	$first_line = min($first_line, head_key($added_lines));
	}
	}
	$lines += $add_lines + $del_lines;
	} else {
	// This happens when you add empty files.
	$changeset->attachHunks(array());
	}

	$metadata = $change->getAllMetadata();
	if ($first_line != PHP_INT_MAX) {
	$metadata['line:first'] = $first_line;
	}

	$changeset->setOldFile($change->getOldPath());
	$changeset->setFilename($change->getCurrentPath());
	$changeset->setChangeType($change->getType());

	$changeset->setFileType($change->getFileType());
	$changeset->setMetadata($metadata);
	$changeset->setOldProperties($change->getOldProperties());
	$changeset->setNewProperties($change->getNewProperties());
	$changeset->setAwayPaths($change->getAwayPaths());
	$changeset->setAddLines($add_lines);
	$changeset->setDelLines($del_lines);

	$diff->addUnsavedChangeset($changeset);
	}
	$diff->setLineCount($lines);

	$parser = new DifferentialChangesetParser();
	$changesets = $parser->detectCopiedCode(
	$diff->getChangesets(),
	$min_width = 30,
	$min_lines = 3);
	$diff->attachChangesets($changesets);

	return $diff;
	}


	public function getDiffDict() {
	$dict = array(
	'id' => $this->getID(),
	'revisionID' => $this->getRevisionID(),
	'dateCreated' => $this->getDateCreated(),
	'dateModified' => $this->getDateModified(),
	'sourceControlBaseRevision' => $this->getSourceControlBaseRevision(),
	'sourceControlPath' => $this->getSourceControlPath(),
	'sourceControlSystem' => $this->getSourceControlSystem(),
	'branch' => $this->getBranch(),
	'bookmark' => $this->getBookmark(),
	'creationMethod' => $this->getCreationMethod(),
	'description' => $this->getDescription(),
	'unitStatus' => $this->getUnitStatus(),
	'lintStatus' => $this->getLintStatus(),
	'changes' => array(),
	);

	$dict['changes'] = $this->buildChangesList();

	return $dict + $this->getDiffAuthorshipDict();
	}

	public function getDiffAuthorshipDict() {
	$dict = array('properties' => array());

	$properties = id(new DifferentialDiffProperty())->loadAllWhere(
	'diffID = %d',
	$this->getID());
	foreach ($properties as $property) {
	$dict['properties'][$property->getName()] = $property->getData();

	if ($property->getName() == 'local:commits') {
	foreach ($property->getData() as $commit) {
	$dict['authorName'] = $commit['author'];
	$dict['authorEmail'] = idx($commit, 'authorEmail');
	break;
	}
	}
	}

	return $dict;
	}

	public function buildChangesList() {
	$changes = array();
	foreach ($this->getChangesets() as $changeset) {
	$hunks = array();
	foreach ($changeset->getHunks() as $hunk) {
	$hunks[] = array(
	'oldOffset' => $hunk->getOldOffset(),
	'newOffset' => $hunk->getNewOffset(),
	'oldLength' => $hunk->getOldLen(),
	'newLength' => $hunk->getNewLen(),
	'addLines' => null,
	'delLines' => null,
	'isMissingOldNewline' => null,
	'isMissingNewNewline' => null,
	'corpus' => $hunk->getChanges(),
	);
	}
	$change = array(
	'id' => $changeset->getID(),
	'metadata' => $changeset->getMetadata(),
	'oldPath' => $changeset->getOldFile(),
	'currentPath' => $changeset->getFilename(),
	'awayPaths' => $changeset->getAwayPaths(),
	'oldProperties' => $changeset->getOldProperties(),
	'newProperties' => $changeset->getNewProperties(),
	'type' => $changeset->getChangeType(),
	'fileType' => $changeset->getFileType(),
	'commitHash' => null,
	'addLines' => $changeset->getAddLines(),
	'delLines' => $changeset->getDelLines(),
	'hunks' => $hunks,
	);
	$changes[] = $change;
	}
	return $changes;
	}

	public function hasRevision() {
	return $this->revision !== self::ATTACHABLE;
	}

	public function getRevision() {
	return $this->assertAttached($this->revision);
	}

	public function attachRevision(DifferentialRevision $revision = null) {
	$this->revision = $revision;
	return $this;
	}

	public function attachProperty($key, $value) {
	$this->properties[$key] = $value;
	return $this;
	}

	public function getProperty($key) {
	return $this->assertAttachedKey($this->properties, $key);
	}

	public function hasDiffProperty($key) {
	$properties = $this->getDiffProperties();
	return array_key_exists($key, $properties);
	}

	public function attachDiffProperties(array $properties) {
	$this->properties = $properties;
	return $this;
	}

	public function getDiffProperties() {
	return $this->assertAttached($this->properties);
	}

	public function attachBuildable(HarbormasterBuildable $buildable = null) {
	$this->buildable = $buildable;
	return $this;
	}

	public function getBuildable() {
	return $this->assertAttached($this->buildable);
	}

	public function getBuildTargetPHIDs() {
	$buildable = $this->getBuildable();

	if (!$buildable) {
	return array();
	}

	$target_phids = array();
	foreach ($buildable->getBuilds() as $build) {
	foreach ($build->getBuildTargets() as $target) {
	$target_phids[] = $target->getPHID();
	}
	}

	return $target_phids;
	}

	public function loadCoverageMap(PhabricatorUser $viewer) {
	$target_phids = $this->getBuildTargetPHIDs();
	if (!$target_phids) {
	return array();
	}

	$unit = id(new HarbormasterBuildUnitMessage())->loadAllWhere(
	'buildTargetPHID IN (%Ls)',
	$target_phids);

	$map = array();
	foreach ($unit as $message) {
	$coverage = $message->getProperty('coverage', array());
	foreach ($coverage as $path => $coverage_data) {
	$map[$path][] = $coverage_data;
	}
	}

	foreach ($map as $path => $coverage_items) {
	$map[$path] = ArcanistUnitTestResult::mergeCoverage($coverage_items);
	}

	return $map;
	}

	public function getURI() {
	$id = $this->getID();
	return "/differential/diff/{$id}/";
	}


	public function attachUnitMessages(array $unit_messages) {
	$this->unitMessages = $unit_messages;
	return $this;
	}


	public function getUnitMessages() {
	return $this->assertAttached($this->unitMessages);
	}


	/* -( PhabricatorPolicyInterface )----------------------------------------- */


	public function getCapabilities() {
	return array(
	PhabricatorPolicyCapability::CAN_VIEW,
	);
	}

	public function getPolicy($capability) {
	if ($this->hasRevision()) {
	return PhabricatorPolicies::getMostOpenPolicy();
	}

	return $this->viewPolicy;
	}

	public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
	if ($this->hasRevision()) {
	return $this->getRevision()->hasAutomaticCapability($capability, $viewer);
	}

	return ($this->getAuthorPHID() == $viewer->getPHID());
	}

	public function describeAutomaticCapability($capability) {
	if ($this->hasRevision()) {
	return pht(
	'This diff is attached to a revision, and inherits its policies.');
	}

	return pht('The author of a diff can see it.');
	}


	/* -( PhabricatorExtendedPolicyInterface )--------------------------------- */


	public function getExtendedPolicy($capability, PhabricatorUser $viewer) {
	$extended = array();

	switch ($capability) {
	case PhabricatorPolicyCapability::CAN_VIEW:
	if ($this->hasRevision()) {
	$extended[] = array(
	$this->getRevision(),
	PhabricatorPolicyCapability::CAN_VIEW,
	);
	}
	break;
	}

	return $extended;
	}


	/* -( HarbormasterBuildableInterface )------------------------------------- */


	public function getHarbormasterBuildableDisplayPHID() {
	$container_phid = $this->getHarbormasterContainerPHID();
	if ($container_phid) {
	return $container_phid;
	}

	return $this->getHarbormasterBuildablePHID();
	}

	public function getHarbormasterBuildablePHID() {
	return $this->getPHID();
	}

	public function getHarbormasterContainerPHID() {
	if ($this->getRevisionID()) {
	$revision = id(new DifferentialRevision())->load($this->getRevisionID());
	if ($revision) {
	return $revision->getPHID();
	}
	}

	return null;
	}

	public function getHarbormasterPublishablePHID() {
	return $this->getHarbormasterContainerPHID();
	}

	public function getBuildVariables() {
	$results = array();

	$results['buildable.diff'] = $this->getID();
	if ($this->revisionID) {
	$revision = $this->getRevision();
	$results['buildable.revision'] = $revision->getID();
	$repo = $revision->getRepository();

	if ($repo) {
	$results['repository.callsign'] = $repo->getCallsign();
	$results['repository.phid'] = $repo->getPHID();
	$results['repository.vcs'] = $repo->getVersionControlSystem();
	$results['repository.uri'] = $repo->getPublicCloneURI();

	$results['repository.staging.uri'] = $repo->getStagingURI();
	$results['repository.staging.ref'] = $this->getStagingRef();
	}
	}

	return $results;
	}

	public function getAvailableBuildVariables() {
	return array(
	'buildable.diff' =>
	pht('The differential diff ID, if applicable.'),
	'buildable.revision' =>
	pht('The differential revision ID, if applicable.'),
	'repository.callsign' =>
	pht('The callsign of the repository in Phabricator.'),
	'repository.phid' =>
	pht('The PHID of the repository in Phabricator.'),
	'repository.vcs' =>
	pht('The version control system, either "svn", "hg" or "git".'),
	'repository.uri' =>
	pht('The URI to clone or checkout the repository from.'),
	'repository.staging.uri' =>
	pht('The URI of the staging repository.'),
	'repository.staging.ref' =>
	pht('The ref name for this change in the staging repository.'),
	);
	}


	/* -( HarbormasterCircleCIBuildableInterface )----------------------------- */


	public function getCircleCIGitHubRepositoryURI() {
	$diff_phid = $this->getPHID();
	$repository_phid = $this->getRepositoryPHID();
	if (!$repository_phid) {
	throw new Exception(
	pht(
	'This diff ("%s") is not associated with a repository. A diff '.
	'must belong to a tracked repository to be built by CircleCI.',
	$diff_phid));
	}

	$repository = id(new PhabricatorRepositoryQuery())
	->setViewer(PhabricatorUser::getOmnipotentUser())
	->withPHIDs(array($repository_phid))
	->executeOne();
	if (!$repository) {
	throw new Exception(
	pht(
	'This diff ("%s") is associated with a repository ("%s") which '.
	'could not be loaded.',
	$diff_phid,
	$repository_phid));
	}

	$staging_uri = $repository->getStagingURI();
	if (!$staging_uri) {
	throw new Exception(
	pht(
	'This diff ("%s") is associated with a repository ("%s") that '.
	'does not have a Staging Area configured. You must configure a '.
	'Staging Area to use CircleCI integration.',
	$diff_phid,
	$repository_phid));
	}

	$path = HarbormasterCircleCIBuildStepImplementation::getGitHubPath(
	$staging_uri);
	if (!$path) {
	throw new Exception(
	pht(
	'This diff ("%s") is associated with a repository ("%s") that '.
	'does not have a Staging Area ("%s") that is hosted on GitHub. '.
	'CircleCI can only build from GitHub, so the Staging Area for '.
	'the repository must be hosted there.',
	$diff_phid,
	$repository_phid,
	$staging_uri));
	}

	return $staging_uri;
	}

	public function getCircleCIBuildIdentifierType() {
	return 'tag';
	}

	public function getCircleCIBuildIdentifier() {
	$ref = $this->getStagingRef();
	$ref = preg_replace('(^refs/tags/)', '', $ref);
	return $ref;
	}

	public function getStagingRef() {
	// TODO: We're just hoping to get lucky. Instead, `arc` should store
	// where it sent changes and we should only provide staging details
	// if we reasonably believe they are accurate.
	return 'refs/tags/phabricator/diff/'.$this->getID();
	}

	public function loadTargetBranch() {
	// TODO: This is sketchy, but just eat the query cost until this can get
	// cleaned up.

	// For now, we're only returning a target if there's exactly one and it's
	// a branch, since we don't support landing to more esoteric targets like
	// tags yet.

	$property = id(new DifferentialDiffProperty())->loadOneWhere(
	'diffID = %d AND name = %s',
	$this->getID(),
	'arc:onto');
	if (!$property) {
	return null;
	}

	$data = $property->getData();

	if (!$data) {
	return null;
	}

	if (!is_array($data)) {
	return null;
	}

	if (count($data) != 1) {
	return null;
	}

	$onto = head($data);
	if (!is_array($onto)) {
	return null;
	}

	$type = idx($onto, 'type');
	if ($type != 'branch') {
	return null;
	}

	return idx($onto, 'name');
	}


	/* -( PhabricatorApplicationTransactionInterface )------------------------- */


	public function getApplicationTransactionEditor() {
	return new DifferentialDiffEditor();
	}

	public function getApplicationTransactionObject() {
	return $this;
	}

	public function getApplicationTransactionTemplate() {
	return new DifferentialDiffTransaction();
	}

	public function willRenderTimeline(
	PhabricatorApplicationTransactionView $timeline,
	AphrontRequest $request) {

	return $timeline;
	}


	/* -( PhabricatorDestructibleInterface )----------------------------------- */


	public function destroyObjectPermanently(
	PhabricatorDestructionEngine $engine) {

	$this->openTransaction();
	$this->delete();

	foreach ($this->loadChangesets() as $changeset) {
	$changeset->delete();
	}

	$properties = id(new DifferentialDiffProperty())->loadAllWhere(
	'diffID = %d',
	$this->getID());
	foreach ($properties as $prop) {
	$prop->delete();
	}

	$this->saveTransaction();
	}

	}

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