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PhabricatorFeedStory.php
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Fri, Aug 9, 01:56

PhabricatorFeedStory.php
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<?php
/**
* Manages rendering and aggregation of a story. A story is an event (like a
* user adding a comment) which may be represented in different forms on
* different channels (like feed, notifications and realtime alerts).
*
* @task load Loading Stories
* @task policy Policy Implementation
*/
abstract class PhabricatorFeedStory implements PhabricatorPolicyInterface {
private $data;
private $hasViewed;
private $framed;
private $handles = array();
private $objects = array();
/* -( Loading Stories )---------------------------------------------------- */
/**
* Given @{class:PhabricatorFeedStoryData} rows, load them into objects and
* construct appropriate @{class:PhabricatorFeedStory} wrappers for each
* data row.
*
* @param list<dict> List of @{class:PhabricatorFeedStoryData} rows from the
* database.
* @return list<PhabricatorFeedStory> List of @{class:PhabricatorFeedStory}
* objects.
* @task load
*/
public static function loadAllFromRows(array $rows, PhabricatorUser $viewer) {
$stories = array();
$data = id(new PhabricatorFeedStoryData())->loadAllFromArray($rows);
foreach ($data as $story_data) {
$class = $story_data->getStoryType();
try {
$ok =
class_exists($class) &&
is_subclass_of($class, 'PhabricatorFeedStory');
} catch (PhutilMissingSymbolException $ex) {
$ok = false;
}
// If the story type isn't a valid class or isn't a subclass of
// PhabricatorFeedStory, decline to load it.
if (!$ok) {
continue;
}
$key = $story_data->getChronologicalKey();
$stories[$key] = newv($class, array($story_data));
}
$object_phids = array();
$key_phids = array();
foreach ($stories as $key => $story) {
$phids = array();
foreach ($story->getRequiredObjectPHIDs() as $phid) {
$phids[$phid] = true;
}
if ($story->getPrimaryObjectPHID()) {
$phids[$story->getPrimaryObjectPHID()] = true;
}
$key_phids[$key] = $phids;
$object_phids += $phids;
}
$objects = id(new PhabricatorObjectHandleData(array_keys($object_phids)))
->setViewer($viewer)
->loadObjects();
foreach ($key_phids as $key => $phids) {
if (!$phids) {
continue;
}
$story_objects = array_select_keys($objects, array_keys($phids));
if (count($story_objects) != count($phids)) {
// An object this story requires either does not exist or is not visible
// to the user. Decline to render the story.
unset($stories[$key]);
unset($key_phids[$key]);
continue;
}
$stories[$key]->setObjects($story_objects);
}
$handle_phids = array();
foreach ($stories as $key => $story) {
foreach ($story->getRequiredHandlePHIDs() as $phid) {
$key_phids[$key][$phid] = true;
}
if ($story->getAuthorPHID()) {
$key_phids[$key][$story->getAuthorPHID()] = true;
}
$handle_phids += $key_phids[$key];
}
$handles = id(new PhabricatorObjectHandleData(array_keys($handle_phids)))
->setViewer($viewer)
->loadHandles();
foreach ($key_phids as $key => $phids) {
if (!$phids) {
continue;
}
$story_handles = array_select_keys($handles, array_keys($phids));
$stories[$key]->setHandles($story_handles);
}
return $stories;
}
public function setObjects(array $objects) {
$this->objects = $objects;
return $this;
}
public function getObject($phid) {
$object = idx($this->objects, $phid);
if (!$object) {
throw new Exception(
"Story is asking for an object it did not request ('{$phid}')!");
}
return $object;
}
public function getPrimaryObject() {
$phid = $this->getPrimaryObjectPHID();
if (!$phid) {
throw new Exception("Story has no primary object!");
}
return $this->getObject($phid);
}
public function getPrimaryObjectPHID() {
return null;
}
final public function __construct(PhabricatorFeedStoryData $data) {
$this->data = $data;
}
abstract public function renderView();
public function getRequiredHandlePHIDs() {
return array();
}
public function getRequiredObjectPHIDs() {
return array();
}
public function setHasViewed($has_viewed) {
$this->hasViewed = $has_viewed;
return $this;
}
public function getHasViewed() {
return $this->hasViewed;
}
final public function setFramed($framed) {
$this->framed = $framed;
return $this;
}
final public function setHandles(array $handles) {
assert_instances_of($handles, 'PhabricatorObjectHandle');
$this->handles = $handles;
return $this;
}
final protected function getObjects() {
return $this->objects;
}
final protected function getHandles() {
return $this->handles;
}
final protected function getHandle($phid) {
if (isset($this->handles[$phid])) {
if ($this->handles[$phid] instanceof PhabricatorObjectHandle) {
return $this->handles[$phid];
}
}
$handle = new PhabricatorObjectHandle();
$handle->setPHID($phid);
$handle->setName("Unloaded Object '{$phid}'");
return $handle;
}
final public function getStoryData() {
return $this->data;
}
final public function getEpoch() {
return $this->getStoryData()->getEpoch();
}
final public function getChronologicalKey() {
return $this->getStoryData()->getChronologicalKey();
}
final public function getValue($key, $default = null) {
return $this->getStoryData()->getValue($key, $default);
}
final public function getAuthorPHID() {
return $this->getStoryData()->getAuthorPHID();
}
final protected function renderHandleList(array $phids) {
$list = array();
foreach ($phids as $phid) {
$list[] = $this->linkTo($phid);
}
return implode(', ', $list);
}
final protected function linkTo($phid) {
$handle = $this->getHandle($phid);
// NOTE: We render our own link here to customize the styling and add
// the '_top' target for framed feeds.
return phutil_tag(
'a',
array(
'href' => $handle->getURI(),
'target' => $this->framed ? '_top' : null,
),
$handle->getLinkName());
}
final protected function renderString($str) {
return phutil_tag('strong', array(), $str);
}
final protected function renderSummary($text, $len = 128) {
if ($len) {
$text = phutil_utf8_shorten($text, $len);
}
$text = phutil_escape_html_newlines($text);
return $text;
}
public function getNotificationAggregations() {
return array();
}
/* -( PhabricatorPolicyInterface Implementation )-------------------------- */
/**
* @task policy
*/
public function getCapabilities() {
return array(
PhabricatorPolicyCapability::CAN_VIEW,
);
}
/**
* @task policy
*/
public function getPolicy($capability) {
// If this story's primary object is a policy-aware object, use its policy
// to control story visiblity.
$primary_phid = $this->getPrimaryObjectPHID();
if (isset($this->objects[$primary_phid])) {
$object = $this->objects[$primary_phid];
if ($object instanceof PhabricatorPolicyInterface) {
return $object->getPolicy($capability);
}
}
// TODO: Remove this once all objects are policy-aware. For now, keep
// respecting the `feed.public` setting.
return PhabricatorEnv::getEnvConfig('feed.public')
? PhabricatorPolicies::POLICY_PUBLIC
: PhabricatorPolicies::POLICY_USER;
}
/**
* @task policy
*/
public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
return false;
}
}

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