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