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ConpherenceThreadSearchEngine.php
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Fri, Nov 22, 23:49

ConpherenceThreadSearchEngine.php
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<?php
final class ConpherenceThreadSearchEngine
extends PhabricatorApplicationSearchEngine {
public function getResultTypeDescription() {
return pht('Rooms');
}
public function getApplicationClassName() {
return 'PhabricatorConpherenceApplication';
}
public function newQuery() {
return id(new ConpherenceThreadQuery())
->needParticipantCache(true);
}
protected function buildCustomSearchFields() {
return array(
id(new PhabricatorUsersSearchField())
->setLabel(pht('Participants'))
->setKey('participants')
->setAliases(array('participant')),
id(new PhabricatorSearchTextField())
->setLabel(pht('Contains Words'))
->setKey('fulltext'),
);
}
protected function getDefaultFieldOrder() {
return array(
'participants',
'...',
);
}
protected function shouldShowOrderField() {
return false;
}
protected function buildQueryFromParameters(array $map) {
$query = $this->newQuery();
if ($map['participants']) {
$query->withParticipantPHIDs($map['participants']);
}
if ($map['fulltext']) {
$query->withFulltext($map['fulltext']);
}
return $query;
}
protected function getURI($path) {
return '/conpherence/search/'.$path;
}
protected function getBuiltinQueryNames() {
$names = array();
if ($this->requireViewer()->isLoggedIn()) {
$names['participant'] = pht('Joined Rooms');
}
$names['all'] = pht('All Rooms');
return $names;
}
public function buildSavedQueryFromBuiltin($query_key) {
$query = $this->newSavedQuery();
$query->setQueryKey($query_key);
switch ($query_key) {
case 'all':
return $query;
case 'participant':
return $query->setParameter(
'participants',
array($this->requireViewer()->getPHID()));
}
return parent::buildSavedQueryFromBuiltin($query_key);
}
protected function getRequiredHandlePHIDsForResultList(
array $conpherences,
PhabricatorSavedQuery $query) {
$recent = mpull($conpherences, 'getRecentParticipantPHIDs');
return array_unique(array_mergev($recent));
}
protected function renderResultList(
array $conpherences,
PhabricatorSavedQuery $query,
array $handles) {
assert_instances_of($conpherences, 'ConpherenceThread');
$viewer = $this->requireViewer();
$policy_objects = ConpherenceThread::loadViewPolicyObjects(
$viewer,
$conpherences);
$engines = array();
$fulltext = $query->getParameter('fulltext');
if (strlen($fulltext) && $conpherences) {
$context = $this->loadContextMessages($conpherences, $fulltext);
$author_phids = array();
foreach ($context as $phid => $messages) {
$conpherence = $conpherences[$phid];
$engine = id(new PhabricatorMarkupEngine())
->setViewer($viewer)
->setContextObject($conpherence);
foreach ($messages as $group) {
foreach ($group as $message) {
$xaction = $message['xaction'];
if ($xaction) {
$author_phids[] = $xaction->getAuthorPHID();
$engine->addObject(
$xaction->getComment(),
PhabricatorApplicationTransactionComment::MARKUP_FIELD_COMMENT);
}
}
}
$engine->process();
$engines[$phid] = $engine;
}
$handles = $viewer->loadHandles($author_phids);
$handles = iterator_to_array($handles);
} else {
$context = array();
}
$list = new PHUIObjectItemListView();
$list->setUser($viewer);
foreach ($conpherences as $conpherence_phid => $conpherence) {
$created = phabricator_date($conpherence->getDateCreated(), $viewer);
$title = $conpherence->getDisplayTitle($viewer);
$monogram = $conpherence->getMonogram();
$icon_name = $conpherence->getPolicyIconName($policy_objects);
$icon = id(new PHUIIconView())
->setIcon($icon_name);
$item = id(new PHUIObjectItemView())
->setObjectName($conpherence->getMonogram())
->setHeader($title)
->setHref('/'.$conpherence->getMonogram())
->setObject($conpherence)
->addIcon('none', $created)
->addIcon(
'none',
pht('Messages: %d', $conpherence->getMessageCount()))
->addAttribute(
array(
$icon,
' ',
pht(
'Last updated %s',
phabricator_datetime($conpherence->getDateModified(), $viewer)),
));
$messages = idx($context, $conpherence_phid);
if ($messages) {
foreach ($messages as $group) {
$rows = array();
foreach ($group as $message) {
$xaction = $message['xaction'];
if (!$xaction) {
continue;
}
$view = id(new ConpherenceTransactionView())
->setUser($viewer)
->setHandles($handles)
->setMarkupEngine($engines[$conpherence_phid])
->setConpherenceThread($conpherence)
->setConpherenceTransaction($xaction)
->setFullDisplay(false)
->addClass('conpherence-fulltext-result');
if ($message['match']) {
$view->addClass('conpherence-fulltext-match');
}
$rows[] = $view;
}
$box = id(new PHUIBoxView())
->appendChild($rows)
->addClass('conpherence-fulltext-results');
$item->appendChild($box);
}
}
$list->addItem($item);
}
$result = new PhabricatorApplicationSearchResultView();
$result->setObjectList($list);
$result->setNoDataString(pht('No threads found.'));
return $result;
}
private function loadContextMessages(array $threads, $fulltext) {
$phids = mpull($threads, 'getPHID');
// We want to load a few messages for each thread in the result list, to
// show some of the actual content hits to help the user find what they
// are looking for.
// This method is trying to batch this lookup in most cases, so we do
// between one and "a handful" of queries instead of one per thread in
// most cases. To do this:
//
// - Load a big block of results for all of the threads.
// - If we didn't get a full block back, we have everything that matches
// the query. Sort it out and exit.
// - Otherwise, some threads had a ton of hits, so we might not be
// getting everything we want (we could be getting back 1,000 hits for
// the first thread). Remove any threads which we have enough results
// for and try again.
// - Repeat until we have everything or every thread has enough results.
//
// In the worst case, we could end up degrading to one query per thread,
// but this is incredibly unlikely on real data.
// Size of the result blocks we're going to load.
$limit = 1000;
// Number of messages we want for each thread.
$want = 3;
$need = $phids;
$hits = array();
while ($need) {
$rows = id(new ConpherenceFulltextQuery())
->withThreadPHIDs($need)
->withFulltext($fulltext)
->setLimit($limit)
->execute();
foreach ($rows as $row) {
$hits[$row['threadPHID']][] = $row;
}
if (count($rows) < $limit) {
break;
}
foreach ($need as $key => $phid) {
if (count($hits[$phid]) >= $want) {
unset($need[$key]);
}
}
}
// Now that we have all the fulltext matches, throw away any extras that we
// aren't going to render so we don't need to do lookups on them.
foreach ($hits as $phid => $rows) {
if (count($rows) > $want) {
$hits[$phid] = array_slice($rows, 0, $want);
}
}
// For each fulltext match, we want to render a message before and after
// the match to give it some context. We already know the transactions
// before each match because the rows have a "previousTransactionPHID",
// but we need to do one more query to figure out the transactions after
// each match.
// Collect the transactions we want to find the next transactions for.
$after = array();
foreach ($hits as $phid => $rows) {
foreach ($rows as $row) {
$after[] = $row['transactionPHID'];
}
}
// Look up the next transactions.
if ($after) {
$after_rows = id(new ConpherenceFulltextQuery())
->withPreviousTransactionPHIDs($after)
->execute();
} else {
$after_rows = array();
}
// Build maps from PHIDs to the previous and next PHIDs.
$prev_map = array();
$next_map = array();
foreach ($after_rows as $row) {
$next_map[$row['previousTransactionPHID']] = $row['transactionPHID'];
}
foreach ($hits as $phid => $rows) {
foreach ($rows as $row) {
$prev = $row['previousTransactionPHID'];
if ($prev) {
$prev_map[$row['transactionPHID']] = $prev;
$next_map[$prev] = $row['transactionPHID'];
}
}
}
// Now we're going to collect the actual transaction PHIDs, in order, that
// we want to show for each thread.
$groups = array();
foreach ($hits as $thread_phid => $rows) {
$rows = ipull($rows, null, 'transactionPHID');
$done = array();
foreach ($rows as $phid => $row) {
if (isset($done[$phid])) {
continue;
}
$done[$phid] = true;
$group = array();
// Walk backward, finding all the previous results. We can just keep
// going until we run out of results because we've only loaded things
// that we want to show.
$prev = $phid;
while (true) {
if (!isset($prev_map[$prev])) {
// No previous transaction, so we're done.
break;
}
$prev = $prev_map[$prev];
if (isset($rows[$prev])) {
$match = true;
$done[$prev] = true;
} else {
$match = false;
}
$group[] = array(
'phid' => $prev,
'match' => $match,
);
}
if (count($group) > 1) {
$group = array_reverse($group);
}
$group[] = array(
'phid' => $phid,
'match' => true,
);
$next = $phid;
while (true) {
if (!isset($next_map[$next])) {
break;
}
$next = $next_map[$next];
if (isset($rows[$next])) {
$match = true;
$done[$next] = true;
} else {
$match = false;
}
$group[] = array(
'phid' => $next,
'match' => $match,
);
}
$groups[$thread_phid][] = $group;
}
}
// Load all the actual transactions we need.
$xaction_phids = array();
foreach ($groups as $thread_phid => $group) {
foreach ($group as $list) {
foreach ($list as $item) {
$xaction_phids[] = $item['phid'];
}
}
}
if ($xaction_phids) {
$xactions = id(new ConpherenceTransactionQuery())
->setViewer($this->requireViewer())
->withPHIDs($xaction_phids)
->needComments(true)
->execute();
$xactions = mpull($xactions, null, 'getPHID');
} else {
$xactions = array();
}
foreach ($groups as $thread_phid => $group) {
foreach ($group as $key => $list) {
foreach ($list as $lkey => $item) {
$xaction = idx($xactions, $item['phid']);
if ($xaction->shouldHide()) {
continue;
}
$groups[$thread_phid][$key][$lkey]['xaction'] = $xaction;
}
}
}
// TODO: Sort the groups chronologically?
return $groups;
}
}

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