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ConpherenceListController.php
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Sat, Jan 18, 18:53

ConpherenceListController.php
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<?php
/**
* @group conpherence
*/
final class ConpherenceListController
extends ConpherenceController {
const SELECTED_MODE = 'selected';
const UNSELECTED_MODE = 'unselected';
const PAGING_MODE = 'paging';
private $conpherenceID;
public function setConpherenceID($conpherence_id) {
$this->conpherenceID = $conpherence_id;
return $this;
}
public function getConpherenceID() {
return $this->conpherenceID;
}
public function willProcessRequest(array $data) {
$this->setConpherenceID(idx($data, 'id'));
}
/**
* Three main modes of operation...
*
* 1 - /conpherence/ - UNSELECTED_MODE
* 2 - /conpherence/<id>/ - SELECTED_MODE
* 3 - /conpherence/?direction='up'&... - PAGING_MODE
*
* UNSELECTED_MODE is not an Ajax request while the other two are Ajax
* requests.
*/
private function determineMode() {
$request = $this->getRequest();
$mode = self::UNSELECTED_MODE;
if ($request->isAjax()) {
if ($request->getStr('direction')) {
$mode = self::PAGING_MODE;
} else {
$mode = self::SELECTED_MODE;
}
}
return $mode;
}
public function processRequest() {
$request = $this->getRequest();
$user = $request->getUser();
$title = pht('Conpherence');
$conpherence = null;
$scroll_up_participant = $this->getEmptyParticipant();
$scroll_down_participant = $this->getEmptyParticipant();
$too_many = ConpherenceParticipantQuery::LIMIT + 1;
$all_participation = array();
$mode = $this->determineMode();
switch ($mode) {
case self::SELECTED_MODE:
$conpherence_id = $this->getConpherenceID();
$conpherence = id(new ConpherenceThreadQuery())
->setViewer($user)
->withIDs(array($conpherence_id))
->executeOne();
if (!$conpherence) {
return new Aphront404Response();
}
if ($conpherence->getTitle()) {
$title = $conpherence->getTitle();
}
$cursor = $conpherence->getParticipant($user->getPHID());
$data = $this->loadParticipationWithMidCursor($cursor);
$all_participation = $data['participation'];
$scroll_up_participant = $data['scroll_up_participant'];
$scroll_down_participant = $data['scroll_down_participant'];
break;
case self::PAGING_MODE:
$direction = $request->getStr('direction');
$id = $request->getInt('participant_id');
$date_touched = $request->getInt('date_touched');
$conpherence_phid = $request->getStr('conpherence_phid');
if ($direction == 'up') {
$order = ConpherenceParticipantQuery::ORDER_NEWER;
} else {
$order = ConpherenceParticipantQuery::ORDER_OLDER;
}
$scroller_participant = id(new ConpherenceParticipant())
->makeEphemeral()
->setID($id)
->setDateTouched($date_touched)
->setConpherencePHID($conpherence_phid);
$participation = id(new ConpherenceParticipantQuery())
->withParticipantPHIDs(array($user->getPHID()))
->withParticipantCursor($scroller_participant)
->setOrder($order)
->setLimit($too_many)
->execute();
if (count($participation) == $too_many) {
if ($direction == 'up') {
$node = $scroll_up_participant = reset($participation);
} else {
$node = $scroll_down_participant = end($participation);
}
unset($participation[$node->getConpherencePHID()]);
}
$all_participation = $participation;
break;
case self::UNSELECTED_MODE:
default:
$too_many = ConpherenceParticipantQuery::LIMIT + 1;
$all_participation = id(new ConpherenceParticipantQuery())
->withParticipantPHIDs(array($user->getPHID()))
->setLimit($too_many)
->execute();
if (count($all_participation) == $too_many) {
$node = end($participation);
unset($all_participation[$node->getConpherencePHID()]);
$scroll_down_participant = $node;
}
break;
}
$threads = $this->loadConpherenceThreadData(
$all_participation);
$thread_view = id(new ConpherenceThreadListView())
->setUser($user)
->setBaseURI($this->getApplicationURI())
->setThreads($threads)
->setScrollUpParticipant($scroll_up_participant)
->setScrollDownParticipant($scroll_down_participant);
switch ($mode) {
case self::SELECTED_MODE:
$response = id(new AphrontAjaxResponse())->setContent($thread_view);
break;
case self::PAGING_MODE:
$thread_html = $thread_view->renderThreadsHTML();
$phids = array_keys($participation);
$content = array(
'html' => $thread_html,
'phids' => $phids);
$response = id(new AphrontAjaxResponse())->setContent($content);
break;
case self::UNSELECTED_MODE:
default:
$layout = id(new ConpherenceLayoutView())
->setBaseURI($this->getApplicationURI())
->setThreadView($thread_view)
->setRole('list');
if ($conpherence) {
$layout->setHeader($this->buildHeaderPaneContent($conpherence));
$layout->setThread($conpherence);
} else {
$layout->setHeader(
$this->buildHeaderPaneContent(
id(new ConpherenceThread())
->makeEphemeral()));
}
$response = $this->buildApplicationPage(
$layout,
array(
'title' => $title,
));
break;
}
return $response;
}
/**
* Handles the curious case when we are visiting a conpherence directly
* by issuing two separate queries. Otherwise, additional conpherences
* are fetched asynchronously. Note these can be earlier or later
* (up or down), depending on what conpherence was selected on initial
* load.
*/
private function loadParticipationWithMidCursor(
ConpherenceParticipant $cursor) {
$user = $this->getRequest()->getUser();
$scroll_up_participant = $this->getEmptyParticipant();
$scroll_down_participant = $this->getEmptyParticipant();
// Note this is a bit dodgy since there may be less than this
// amount in either the up or down direction, thus having us fail
// to fetch LIMIT in total. Whatevs for now and re-visit if we're
// fine-tuning this loading process.
$too_many = ceil(ConpherenceParticipantQuery::LIMIT / 2) + 1;
$participant_query = id(new ConpherenceParticipantQuery())
->withParticipantPHIDs(array($user->getPHID()))
->setLimit($too_many);
$current_selection_epoch = $cursor->getDateTouched();
$set_one = $participant_query
->withParticipantCursor($cursor)
->setOrder(ConpherenceParticipantQuery::ORDER_NEWER)
->execute();
if (count($set_one) == $too_many) {
$node = reset($set_one);
unset($set_one[$node->getConpherencePHID()]);
$scroll_up_participant = $node;
}
$set_two = $participant_query
->withParticipantCursor($cursor)
->setOrder(ConpherenceParticipantQuery::ORDER_OLDER)
->execute();
if (count($set_two) == $too_many) {
$node = end($set_two);
unset($set_two[$node->getConpherencePHID()]);
$scroll_down_participant = $node;
}
$participation = array_merge(
$set_one,
$set_two);
return array(
'scroll_up_participant' => $scroll_up_participant,
'scroll_down_participant' => $scroll_down_participant,
'participation' => $participation);
}
private function loadConpherenceThreadData($participation) {
$user = $this->getRequest()->getUser();
$conpherence_phids = array_keys($participation);
$conpherences = array();
if ($conpherence_phids) {
$conpherences = id(new ConpherenceThreadQuery())
->setViewer($user)
->withPHIDs($conpherence_phids)
->needParticipantCache(true)
->execute();
// this will re-sort by participation data
$conpherences = array_select_keys($conpherences, $conpherence_phids);
}
return $conpherences;
}
private function getEmptyParticipant() {
return id(new ConpherenceParticipant())
->makeEphemeral();
}
}

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