%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
namespace Bitrix\Perfmon\Php;
class CodeTree
{
protected $statements = array();
protected $tree = array();
/**
* @param array $statements Sequence of updater statements.
*/
function __construct(array $statements)
{
$this->statements = $statements;
$this->tree = array();
}
/**
* Returns php code.
*
* @param integer $level Alignment level.
*
* @return string
*/
public function getCode($level)
{
$tree = $this->getCodeTree();
return $this->formatCodeTree($tree, $level);
}
/**
* @param array $result Nested arrays of structured code.
* @param integer $level Alignment level.
*
* @return string
*/
protected function formatCodeTree($result, $level=0)
{
$code = '';
foreach ($result as $stmt)
{
if (is_array($stmt) && isset($stmt["if"]))
{
$code .= str_repeat("\t", $level)."if(".implode(" && ", $stmt["if"]).")\n";
$code .= str_repeat("\t", $level)."{\n";
$code .= $this->formatCodeTree($stmt["body"], $level+1);
$code .= str_repeat("\t", $level)."}\n";
}
else
{
$stmt = trim($stmt, "\n\t");
$stmt = preg_replace("/\\n[\\t]+/", "\n", $stmt);
$code .= str_repeat("\t", $level).str_replace("\n\$", "\n".str_repeat("\t", $level)."\$", $stmt)."\n";
}
}
return $code;
}
/**
* @return array
*/
public function getCodeTree()
{
if (!$this->tree)
{
$this->makeCodeTree($this->statements, $this->tree);
}
return $this->tree;
}
/**
* Adds one more line to the body.
*
* @param Statement[] $updaterSteps Plain array of updater steps.
* @param array &$result Nested arrays of structured code.
*
* @return void
*/
protected function makeCodeTree(array $updaterSteps, &$result)
{
foreach ($updaterSteps as $i => $statement)
{
if (empty($statement->conditions))
{
$result[] = $statement->formatBodyLines(0);
unset($updaterSteps[$i]);
}
}
while ($updaterSteps)
{
$byPredicates = array();
foreach ($updaterSteps as $i => $statement)
{
/**
* @var Condition $condition
*/
foreach ($statement->conditions as $condition)
{
$predicate = $condition->getPredicate();
if (!isset($byPredicates[$predicate]))
{
$byPredicates[$predicate] = array(
"predicate" => $predicate,
"dep" => $statement->dependOn,
"sort" => $this->getPredicateSort($predicate),
"count" => 1,
);
}
else
{
$byPredicates[$predicate]["count"]++;
}
}
}
if ($byPredicates)
{
sortByColumn($byPredicates, array(
"dep" => SORT_ASC,
"count" => SORT_DESC,
"sort" => SORT_ASC,
));
$mostPopular = key($byPredicates);
$subSteps = array();
$ifStatement = array(
"if" => array($mostPopular),
"body" => array(),
);
foreach ($updaterSteps as $i => $statement)
{
foreach ($statement->conditions as $j => $condition)
{
if ($condition->getPredicate() == $mostPopular)
{
unset($statement->conditions[$j]);
$subSteps[] = $statement;
unset($updaterSteps[$i]);
}
}
}
$this->makeCodeTree($subSteps, $ifStatement["body"]);
if (
is_array($ifStatement["body"])
&& count($ifStatement["body"]) == 1
&& is_array($ifStatement["body"][0])
&& isset($ifStatement["body"][0]["if"])
&& isset($ifStatement["body"][0]["body"])
&& strlen(implode(' && ', array_merge($ifStatement["if"], $ifStatement["body"][0]["if"]))) < 100
)
{
$ifStatement["if"] = array_merge($ifStatement["if"], $ifStatement["body"][0]["if"]);
$ifStatement["body"] = $ifStatement["body"][0]["body"];
}
$result[] = $ifStatement;
}
}
}
/**
* @param array $predicate Array describing predicate.
*
* @return integer
*/
protected function getPredicateSort($predicate)
{
if (strpos($predicate, "CanUpdateDatabase"))
return 10;
elseif (strpos($predicate, "->type"))
return 20;
elseif (strpos($predicate, "TableExists"))
return 30;
else
return 50;
}
}
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