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phorge/src/applications/fact/function/PhabricatorFactChartFunction.php
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PhabricatorFactChartFunction.php
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<?php
final class PhabricatorFactChartFunction
extends PhabricatorChartFunction {
const FUNCTIONKEY = 'fact';
private $factKey;
private $fact;
private $datapoints;
protected function newArguments(array $arguments) {
if (count($arguments) !== 1) {
throw new Exception(
pht(
'Chart function "fact(...)" expects one argument, got %s. '.
'Pass the key for a fact.',
count($arguments)));
}
if (!is_string($arguments[0])) {
throw new Exception(
pht(
'First argument for "fact(...)" is invalid: expected string, '.
'got %s.',
phutil_describe_type($arguments[0])));
}
$facts = PhabricatorFact::getAllFacts();
$fact = idx($facts, $arguments[0]);
if (!$fact) {
throw new Exception(
pht(
'Argument to "fact(...)" is invalid: "%s" is not a known fact '.
'key.',
$arguments[0]));
}
$this->factKey = $arguments[0];
$this->fact = $fact;
}
public function loadData() {
$fact = $this->fact;
$key_id = id(new PhabricatorFactKeyDimension())
->newDimensionID($fact->getKey());
if (!$key_id) {
return;
}
$table = $fact->newDatapoint();
$conn = $table->establishConnection('r');
$table_name = $table->getTableName();
$data = queryfx_all(
$conn,
'SELECT value, epoch FROM %T WHERE keyID = %d ORDER BY epoch ASC',
$table_name,
$key_id);
if (!$data) {
return;
}
$points = array();
$sum = 0;
foreach ($data as $key => $row) {
$sum += (int)$row['value'];
$points[] = array(
'x' => (int)$row['epoch'],
'y' => $sum,
);
}
$this->datapoints = $points;
}
public function getDatapoints($limit) {
$points = $this->datapoints;
if (!$points) {
return array();
}
// If we have too many data points, throw away some of the data.
$count = count($points);
if ($count > $limit) {
$ii = 0;
$every = ceil($count / $limit);
foreach ($points as $key => $point) {
$ii++;
if (($ii % $every) && ($ii != $count)) {
unset($points[$key]);
}
}
}
return $points;
}
}

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