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PhabricatorObjectGraph.php
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Created
Tue, Nov 26, 19:17

PhabricatorObjectGraph.php
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<?php
abstract class PhabricatorObjectGraph
extends AbstractDirectedGraph {
private $viewer;
private $edges = array();
private $edgeReach = array();
private $seedPHID;
private $objects;
private $loadEntireGraph = false;
private $limit;
public function setViewer(PhabricatorUser $viewer) {
$this->viewer = $viewer;
return $this;
}
public function getViewer() {
if (!$this->viewer) {
throw new PhutilInvalidStateException('setViewer');
}
return $this->viewer;
}
public function setLimit($limit) {
$this->limit = $limit;
return $this;
}
public function getLimit() {
return $this->limit;
}
abstract protected function getEdgeTypes();
abstract protected function getParentEdgeType();
abstract protected function newQuery();
abstract protected function newTableRow($phid, $object, $trace);
abstract protected function newTable(AphrontTableView $table);
abstract protected function isClosed($object);
final public function setSeedPHID($phid) {
$this->seedPHID = $phid;
$this->edgeReach[$phid] = array_fill_keys($this->getEdgeTypes(), true);
return $this->addNodes(
array(
'<seed>' => array($phid),
));
}
final public function isEmpty() {
return (count($this->getNodes()) <= 2);
}
final public function isOverLimit() {
$limit = $this->getLimit();
if (!$limit) {
return false;
}
return (count($this->edgeReach) > $limit);
}
final public function getEdges($type) {
$edges = idx($this->edges, $type, array());
// Remove any nodes which we never reached. We can get these when loading
// only part of the graph: for example, they point at other subtasks of
// parents or other parents of subtasks.
$nodes = $this->getNodes();
foreach ($edges as $src => $dsts) {
foreach ($dsts as $key => $dst) {
if (!isset($nodes[$dst])) {
unset($edges[$src][$key]);
}
}
}
return $edges;
}
final public function setLoadEntireGraph($load_entire_graph) {
$this->loadEntireGraph = $load_entire_graph;
return $this;
}
final public function getLoadEntireGraph() {
return $this->loadEntireGraph;
}
final protected function loadEdges(array $nodes) {
if ($this->isOverLimit()) {
return array_fill_keys($nodes, array());
}
$edge_types = $this->getEdgeTypes();
$query = id(new PhabricatorEdgeQuery())
->withSourcePHIDs($nodes)
->withEdgeTypes($edge_types);
$query->execute();
$whole_graph = $this->getLoadEntireGraph();
$map = array();
foreach ($nodes as $node) {
$map[$node] = array();
foreach ($edge_types as $edge_type) {
$dst_phids = $query->getDestinationPHIDs(
array($node),
array($edge_type));
$this->edges[$edge_type][$node] = $dst_phids;
foreach ($dst_phids as $dst_phid) {
if ($whole_graph || isset($this->edgeReach[$node][$edge_type])) {
$map[$node][] = $dst_phid;
}
$this->edgeReach[$dst_phid][$edge_type] = true;
}
}
$map[$node] = array_values(array_fuse($map[$node]));
}
return $map;
}
final public function newGraphTable() {
$viewer = $this->getViewer();
$ancestry = $this->getEdges($this->getParentEdgeType());
$objects = $this->newQuery()
->setViewer($viewer)
->withPHIDs(array_keys($ancestry))
->execute();
$objects = mpull($objects, null, 'getPHID');
$order = id(new PhutilDirectedScalarGraph())
->addNodes($ancestry)
->getTopographicallySortedNodes();
$ancestry = array_select_keys($ancestry, $order);
$traces = id(new PHUIDiffGraphView())
->renderGraph($ancestry);
$ii = 0;
$rows = array();
$rowc = array();
foreach ($ancestry as $phid => $ignored) {
$object = idx($objects, $phid);
$rows[] = $this->newTableRow($phid, $object, $traces[$ii++]);
$classes = array();
if ($phid == $this->seedPHID) {
$classes[] = 'highlighted';
}
if ($object) {
if ($this->isClosed($object)) {
$classes[] = 'closed';
}
}
if ($classes) {
$classes = implode(' ', $classes);
} else {
$classes = null;
}
$rowc[] = $classes;
}
$table = id(new AphrontTableView($rows))
->setClassName('object-graph-table')
->setRowClasses($rowc);
$this->objects = $objects;
return $this->newTable($table);
}
final public function getReachableObjects($edge_type) {
if ($this->objects === null) {
throw new PhutilInvalidStateException('newGraphTable');
}
$graph = $this->getEdges($edge_type);
$seen = array();
$look = array($this->seedPHID);
while ($look) {
$phid = array_pop($look);
$parents = idx($graph, $phid, array());
foreach ($parents as $parent) {
if (isset($seen[$parent])) {
continue;
}
$seen[$parent] = $parent;
$look[] = $parent;
}
}
$reachable = array();
foreach ($seen as $phid) {
if ($phid == $this->seedPHID) {
continue;
}
$object = idx($this->objects, $phid);
if (!$object) {
continue;
}
$reachable[] = $object;
}
return $reachable;
}
}

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