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<?php
class SkinContext {
protected string $ns;
protected array $data = [];
protected static ?string $root = null;
public static function setRootDirectory(string $root): void {
self::$root = $root;
}
public function __construct(string $namespace) {
$this->ns = $namespace;
require_once self::$root.'/'.str_replace('\\', '/', $namespace).'.skin.php';
}
public function __call($name, array $arguments) {
$plain_args = array_is_list($arguments);
$fn = '\\skin\\'.$this->ns.'\\'.$name;
$refl = new ReflectionFunction($fn);
$fparams = $refl->getParameters();
assert(count($fparams) == count($arguments)+1, "$fn: invalid number of arguments (".count($fparams)." != ".(count($arguments)+1).")");
foreach ($fparams as $n => $param) {
if ($n == 0)
continue; // skip $ctx
$key = $plain_args ? $n-1 : $param->name;
if (!$plain_args && !array_key_exists($param->name, $arguments)) {
if (!$param->isDefaultValueAvailable())
throw new InvalidArgumentException('argument '.$param->name.' not found');
else
continue;
}
if (is_string($arguments[$key]) || $arguments[$key] instanceof SkinString) {
if (is_string($arguments[$key]))
$arguments[$key] = new SkinString($arguments[$key]);
if (($pos = strpos($param->name, '_')) !== false) {
$mod_type = match(substr($param->name, 0, $pos)) {
'unsafe' => SkinStringModificationType::RAW,
'urlencoded' => SkinStringModificationType::URL,
default => SkinStringModificationType::HTML
};
} else {
$mod_type = SkinStringModificationType::HTML;
}
$arguments[$key]->setModType($mod_type);
}
}
array_unshift($arguments, $this);
return call_user_func_array($fn, $arguments);
}
public function __get(string $name) {
$fn = '\\skin\\'.$this->ns.'\\'.$name;
if (function_exists($fn))
return [$this, $name];
if (array_key_exists($name, $this->data))
return $this->data[$name];
}
public function __set(string $name, $value) {
$this->data[$name] = $value;
}
public function if_not($cond, $callback, ...$args) {
return $this->_if_condition(!$cond, $callback, ...$args);
}
public function if_true($cond, $callback, ...$args) {
return $this->_if_condition($cond, $callback, ...$args);
}
public function if_then_else($cond, $cb1, $cb2) {
return $cond ? $this->_return_callback($cb1) : $this->_return_callback($cb2);
}
protected function _if_condition($condition, $callback, ...$args) {
if ($condition)
return $this->_return_callback($callback, $args);
return '';
}
protected function _return_callback($callback, $args = []) {
if (is_callable($callback))
return call_user_func_array($callback, $args);
else if (is_string($callback))
return $callback;
}
public function for_each(array $iterable, callable $callback) {
$html = '';
foreach ($iterable as $k => $v)
$html .= call_user_func($callback, $v, $k);
return $html;
}
}
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