/**
* Set input and output filters
*
* Input filter is nothing but a callable, which accepts 4 parameters:
* http method, uri, handler callback and handler parameters. Returning
* anything other than NULL will keep handler from executing, and showing
* the result to user.
*
* Input filter is mean to filter the work flow, so it SHOULD NOT modify
* these parameters.
*
* Output filter is mean to filter data. It is a simple function accepts
* the result of handler, manipulate on it, then return it back. Anything
* returned from it will show to user, including NULL.
*/
public function setFilters(array $input = array(), array $output = array())
{
// validate input filters
foreach ($input as $i) {
list($f) = Util::reflectionCallable($i);
if (count($f->getParameters()) !== 4) {
throw new Exception('Input filter must accepts exactly 4 parameters');
}
}
// validate output filters
foreach ($output as $o) {
list($f) = Util::reflectionCallable($o);
if (count($f->getParameters()) !== 1) {
throw new Exception('Output filter must accepts exactly 1 parameter');
}
}
$this->currentFilters = array($input, $output);
return $this;
}
/**
* @dataProvider cbP
*/
public function testCompileCallable($cb, $expect, $msg)
{
$this->assertEquals($expect . '()', Util::compileCallable($cb), $msg);
$this->assertEquals($expect . '($a)', Util::compileCallable($cb, ['$a']), $msg);
$this->assertEquals($expect . '($a,$b)', Util::compileCallable($cb, ['$a', '$b']), $msg);
}
public function exportHandler(array $params, bool $raw = false, Interceptor $int = null)
{
if (!is_array($this->handler)) {
return '';
}
list($h, $args) = $this->handler;
if (is_array($h)) {
// (new class($args[0], $args[1]...))->method()
$paramStr = '';
if (count($params) > 0) {
$tmp = array();
foreach ($params as $k => $p) {
$tmp[$k] = $raw ? $p : var_export($p, true);
}
$paramStr = implode(', ', $tmp);
}
$argStr = '';
if (is_array($args)) {
$tmp = array();
foreach ($args as $k => $v) {
$tmp[$k] = var_export($v, true);
}
$argStr = implode(', ', $tmp);
}
$method = var_export($h[1], true);
$intercept = array();
if ($int !== null) {
$intercept[] = '$int->intercept($url, $obj, ' . $method . ');';
}
$input = array();
foreach ($this->inputFilters as $f) {
$input[] = '$ret = ' . Util::compileCallable($f, array('$method', '$url', '[$obj,' . $method . ']', '$params')) . ';';
$input[] = 'if ($ret !== null) {';
$input[] = ' return $ret;';
$input[] = '}';
}
$output = array();
foreach ($this->outputFilters as $f) {
$output[] = '$ret = ' . Util::compileCallable($f, array('$ret')) . ';';
}
$post = array('return $ret;');
if (is_object($h[0])) {
$h[0] = var_export($h[0], true);
return array_merge(['$obj = ' . $h[0] . ';'], $input, $intercept, [sprintf('$ret = $obj->%s(%s);', $h[1], $paramStr)], $output, $post);
}
return array_merge([sprintf('$obj = new %s(%s);', $h[0], $argStr)], $input, $intercept, [sprintf('$ret = $obj->%s(%s);', $h[1], $paramStr)], $output, $post);
}
return ['return ' . Util::compileCallable($h, $params) . ';'];
}