FunctionTemplate_require_implementation.phpt

--TEST--
V8\FunctionTemplate - require() implementation
--SKIPIF--
<?php if (!extension_loaded("v8")) print "skip"; ?>
--FILE--
<?php

/** @var \Phpv8Testsuite $helper */
$helper = require '.testsuite.php';

require '.v8-helpers.php';
$v8_helper = new PhpV8Helpers($helper);

$isolate = new \V8\Isolate();


$code = [];
$code['test.js'] = 'var out = {"foo" : "unchanged"}; out';


// *** This is how require implemented in node.js: ***

/** @var \V8\Value[] $loaded */
$loaded_cache = [];

$require_func_tpl_cache = new \V8\FunctionTemplate($isolate, function (\V8\FunctionCallbackInfo $info) use (&$loaded_cache, &$code) {
  $isolate = $info->getIsolate();
  $context = $info->getContext();

  $module = $info->arguments()[0]->toString($context)->value();

  if (!isset($loaded_cache[$module])) {
    $new_context = new \V8\Context($isolate, new \V8\ObjectTemplate($isolate));

    $script = new \V8\Script($new_context, new \V8\StringValue($isolate, $code[$module]), new \V8\ScriptOrigin($module));

    $loaded_cache[$module] = $script->run($new_context);
  }

  $info->getReturnValue()->set($loaded_cache[$module]);
});
$global_template = new V8\ObjectTemplate($isolate);
$global_template->set(new \V8\StringValue($isolate, 'require'), $require_func_tpl_cache, \V8\PropertyAttribute::DONT_DELETE);
$context = new V8\Context($isolate, $global_template);
$v8_helper->injectConsoleLog($context);

$JS = '
var test = require("test.js");

console.log(test.foo);
test.foo = "changed";
console.log(test.foo);

var test2 = require("test.js");

console.log(test2.foo);
';
$file_name2 = 'experiment.js';

$helper->header('Test require() (with cache)');

$script2 = new V8\Script($context, new \V8\StringValue($isolate, $JS), new \V8\ScriptOrigin($file_name2));
$res2 = $script2->run($context);

$helper->space();



// *** This is how custom require() implementation demo (no caching): ***

/** @var \V8\Script[] $loaded */
$loaded_no_cache = [];

$require_func_tpl_nocache = new \V8\FunctionTemplate($isolate, function (\V8\FunctionCallbackInfo $info) use (&$loaded_no_cache, &$code) {
  $isolate = $info->getIsolate();
  $context = $info->getContext();

  $module = $info->arguments()[0]->toString($context)->value();

  if (!isset($loaded_no_cache[$module])) {
    $new_context = new \V8\Context($isolate, new \V8\ObjectTemplate($isolate));

    $script = new \V8\Script($new_context, new \V8\StringValue($isolate, $code[$module]), new \V8\ScriptOrigin($module));

    $loaded_no_cache[$module] = $script;
  }

  $info->getReturnValue()->set($loaded_no_cache[$module]->Run($context));
});


$global_template = new V8\ObjectTemplate($isolate);
$global_template->set(new \V8\StringValue($isolate, 'require'), $require_func_tpl_nocache, \V8\PropertyAttribute::DONT_DELETE);
$context = new V8\Context($isolate, $global_template);
$v8_helper->injectConsoleLog($context);

$JS = '
var test = require("test.js");

console.log(test.foo);
test.foo = "changed";
console.log(test.foo);

var test2 = require("test.js");

console.log(test2.foo);
';
$file_name2 = 'experiment.js';

$helper->header('Test require() (no cache)');

$script2 = new V8\Script($context, new \V8\StringValue($isolate, $JS), new \V8\ScriptOrigin($file_name2));
$res2 = $script2->run($context);

?>
--EXPECT--
Test require() (with cache):
----------------------------
unchanged
changed
changed


Test require() (no cache):
--------------------------
unchanged
changed
unchanged