PhabricatorHigherOrderChartFunction.php
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PhabricatorHigherOrderChartFunction.php
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	<?php

	abstract class PhabricatorHigherOrderChartFunction
	extends PhabricatorChartFunction {

	public function getDomain() {
	$domains = array();
	foreach ($this->getFunctionArguments() as $function) {
	$domains[] = $function->getDomain();
	}

	return PhabricatorChartInterval::newFromIntervalList($domains);
	}

	public function newInputValues(PhabricatorChartDataQuery $query) {
	$map = array();
	foreach ($this->getFunctionArguments() as $function) {
	$xv = $function->newInputValues($query);
	if ($xv !== null) {
	foreach ($xv as $x) {
	$map[$x] = true;
	}
	}
	}

	if (!$map) {
	return null;
	}

	ksort($map);

	return array_keys($map);
	}

	public function getDataRefs(array $xv) {
	$refs = array();

	foreach ($this->getFunctionArguments() as $function) {
	$function_refs = $function->getDataRefs($xv);

	$function_refs = array_select_keys($function_refs, $xv);
	if (!$function_refs) {
	continue;
	}

	foreach ($function_refs as $x => $ref_list) {
	if (!isset($refs[$x])) {
	$refs[$x] = array();
	}
	foreach ($ref_list as $ref) {
	$refs[$x][] = $ref;
	}
	}
	}

	return $refs;
	}

	public function loadRefs(array $refs) {
	$results = array();

	foreach ($this->getFunctionArguments() as $function) {
	$results += $function->loadRefs($refs);
	}

	return $results;
	}

	}