PhabricatorViewerDatasource.php
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	<?php

	final class PhabricatorViewerDatasource
	extends PhabricatorTypeaheadDatasource {

	public function getBrowseTitle() {
	return pht('Browse Viewer');
	}

	public function getPlaceholderText() {
	return pht('Type viewer()...');
	}

	public function getDatasourceApplicationClass() {
	return 'PhabricatorPeopleApplication';
	}

	public function loadResults() {
	if ($this->getViewer()->getPHID()) {
	$results = array($this->renderViewerFunctionToken());
	} else {
	$results = array();
	}

	return $this->filterResultsAgainstTokens($results);
	}

	protected function canEvaluateFunction($function) {
	if (!$this->getViewer()->getPHID()) {
	return false;
	}

	return ($function == 'viewer');
	}

	protected function evaluateFunction($function, array $argv_list) {
	$results = array();
	foreach ($argv_list as $argv) {
	$results[] = $this->getViewer()->getPHID();
	}
	return $results;
	}

	public function renderFunctionTokens($function, array $argv_list) {
	$tokens = array();
	foreach ($argv_list as $argv) {
	$tokens[] = PhabricatorTypeaheadTokenView::newFromTypeaheadResult(
	$this->renderViewerFunctionToken());
	}
	return $tokens;
	}

	private function renderViewerFunctionToken() {
	return $this->newFunctionResult()
	->setName(pht('Current Viewer'))
	->setPHID('viewer()')
	->setIcon('fa-user')
	->setUnique(true);
	}

	}