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PhabricatorTypeaheadCompositeDatasource.php
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Sun, Jul 21, 14:52

PhabricatorTypeaheadCompositeDatasource.php
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<?php
abstract class PhabricatorTypeaheadCompositeDatasource
extends PhabricatorTypeaheadDatasource {
private $usable;
abstract public function getComponentDatasources();
public function isBrowsable() {
foreach ($this->getUsableDatasources() as $datasource) {
if (!$datasource->isBrowsable()) {
return false;
}
}
return parent::isBrowsable();
}
public function getDatasourceApplicationClass() {
return null;
}
public function loadResults() {
$offset = $this->getOffset();
$limit = $this->getLimit();
// If the input query is a function like `members(platy`, and we can
// parse the function, we strip the function off and hand the stripped
// query to child sources. This makes it easier to implement function
// sources in terms of real object sources.
$raw_query = $this->getRawQuery();
$is_function = false;
if (self::isFunctionToken($raw_query)) {
$is_function = true;
}
$stack = $this->getFunctionStack();
$results = array();
foreach ($this->getUsableDatasources() as $source) {
$source_stack = $stack;
$source_query = $raw_query;
if ($is_function) {
// If this source can't handle the function, skip it.
$function = $source->parseFunction($raw_query, $allow_partial = true);
if (!$function) {
continue;
}
// If this source handles the function directly, strip the function.
// Otherwise, this is something like a composite source which has
// some internal source which can evaluate the function, but will
// perform stripping later.
if ($source->shouldStripFunction($function['name'])) {
$source_query = head($function['argv']);
$source_stack[] = $function['name'];
}
}
$source
->setFunctionStack($source_stack)
->setRawQuery($source_query)
->setQuery($this->getQuery())
->setViewer($this->getViewer());
if ($limit) {
$source->setLimit($offset + $limit);
}
$source_results = $source->loadResults();
$source_results = $source->didLoadResults($source_results);
$results[] = $source_results;
}
$results = array_mergev($results);
$results = msort($results, 'getSortKey');
$count = count($results);
if ($offset || $limit) {
if (!$limit) {
$limit = count($results);
}
$results = array_slice($results, $offset, $limit, $preserve_keys = true);
}
return $results;
}
private function getUsableDatasources() {
if ($this->usable === null) {
$sources = $this->getComponentDatasources();
$usable = array();
foreach ($sources as $source) {
$application_class = $source->getDatasourceApplicationClass();
if ($application_class) {
$result = id(new PhabricatorApplicationQuery())
->setViewer($this->getViewer())
->withClasses(array($application_class))
->execute();
if (!$result) {
continue;
}
}
$source->setViewer($this->getViewer());
$usable[] = $source;
}
$this->usable = $usable;
}
return $this->usable;
}
public function getAllDatasourceFunctions() {
$results = parent::getAllDatasourceFunctions();
foreach ($this->getUsableDatasources() as $source) {
$results += $source->getAllDatasourceFunctions();
}
return $results;
}
protected function didEvaluateTokens(array $results) {
foreach ($this->getUsableDatasources() as $source) {
$results = $source->didEvaluateTokens($results);
}
return $results;
}
protected function canEvaluateFunction($function) {
foreach ($this->getUsableDatasources() as $source) {
if ($source->canEvaluateFunction($function)) {
return true;
}
}
return parent::canEvaluateFunction($function);
}
protected function evaluateFunction($function, array $argv) {
foreach ($this->getUsableDatasources() as $source) {
if ($source->canEvaluateFunction($function)) {
return $source->evaluateFunction($function, $argv);
}
}
return parent::evaluateFunction($function, $argv);
}
public function renderFunctionTokens($function, array $argv_list) {
foreach ($this->getUsableDatasources() as $source) {
if ($source->canEvaluateFunction($function)) {
return $source->renderFunctionTokens($function, $argv_list);
}
}
return parent::renderFunctionTokens($function, $argv_list);
}
protected function renderSpecialTokens(array $values) {
$result = array();
foreach ($this->getUsableDatasources() as $source) {
$special = $source->renderSpecialTokens($values);
foreach ($special as $key => $token) {
$result[$key] = $token;
unset($values[$key]);
}
if (!$values) {
break;
}
}
return $result;
}
}

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