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<?php
namespace JmesPath;
/**
* Provides CLI debugging information for the AST and Compiler runtimes.
*/
class DebugRuntime
{
private $runtime;
private $out;
private $lexer;
private $parser;
public function __construct(callable $runtime, $output = null)
{
$this->runtime = $runtime;
$this->out = $output ?: STDOUT;
$this->lexer = new Lexer();
$this->parser = new Parser($this->lexer);
}
public function __invoke($expression, $data)
{
if ($this->runtime instanceof CompilerRuntime) {
return $this->debugCompiled($expression, $data);
}
return $this->debugInterpreted($expression, $data);
}
private function debugInterpreted($expression, $data)
{
return $this->debugCallback(
function () use ($expression, $data) {
$runtime = $this->runtime;
return $runtime($expression, $data);
},
$expression,
$data
);
}
private function debugCompiled($expression, $data)
{
$result = $this->debugCallback(
function () use ($expression, $data) {
$runtime = $this->runtime;
return $runtime($expression, $data);
},
$expression,
$data
);
$this->dumpCompiledCode($expression);
return $result;
}
private function dumpTokens($expression)
{
$lexer = new Lexer();
fwrite($this->out, "Tokens\n======\n\n");
$tokens = $lexer->tokenize($expression);
foreach ($tokens as $t) {
fprintf(
$this->out,
"%3d %-13s %s\n", $t['pos'], $t['type'],
json_encode($t['value'])
);
}
fwrite($this->out, "\n");
}
private function dumpAst($expression)
{
$parser = new Parser();
$ast = $parser->parse($expression);
fwrite($this->out, "AST\n========\n\n");
fwrite($this->out, json_encode($ast, JSON_PRETTY_PRINT) . "\n");
}
private function dumpCompiledCode($expression)
{
fwrite($this->out, "Code\n========\n\n");
$dir = sys_get_temp_dir();
$hash = md5($expression);
$functionName = "jmespath_{$hash}";
$filename = "{$dir}/{$functionName}.php";
fwrite($this->out, "File: {$filename}\n\n");
fprintf($this->out, file_get_contents($filename));
}
private function debugCallback(callable $debugFn, $expression, $data)
{
fprintf($this->out, "Expression\n==========\n\n%s\n\n", $expression);
$this->dumpTokens($expression);
$this->dumpAst($expression);
fprintf($this->out, "\nData\n====\n\n%s\n\n", json_encode($data, JSON_PRETTY_PRINT));
$startTime = microtime(true);
$result = $debugFn();
$total = microtime(true) - $startTime;
fprintf($this->out, "\nResult\n======\n\n%s\n\n", json_encode($result, JSON_PRETTY_PRINT));
fwrite($this->out, "Time\n====\n\n");
fprintf($this->out, "Total time: %f ms\n\n", $total);
return $result;
}
}