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Resource.php
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Tue, Jul 23, 12:33

Resource.php
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<?php
namespace RESTful;
abstract class Resource
{
protected $_collection_uris,
$_member_uris;
public static function getClient()
{
$class = get_called_class();
return $class::$_client;
}
public static function getRegistry()
{
$class = get_called_class();
return $class::$_registry;
}
public static function getURISpec()
{
$class = get_called_class();
return $class::$_uri_spec;
}
public function __construct($fields = null)
{
if ($fields == null) {
$fields = array();
}
$this->_objectify($fields);
}
public function __get($name)
{
// collection uri
if (array_key_exists($name, $this->_collection_uris)) {
$result = $this->_collection_uris[$name];
$this->$name = new Collection($result['class'], $result['uri']);
return $this->$name;
} // member uri
else if (array_key_exists($name, $this->_member_uris)) {
$result = $this->$_collection_uris[$name];
$response = self::getClient() . get($result['uri']);
$class = $result['class'];
$this->$name = new $class($response->body);
return $this->$name;
}
// unknown
$trace = debug_backtrace();
trigger_error(
sprintf('Undefined property via __get(): %s in %s on line %s', $name, $trace[0]['file'], $trace[0]['line']),
E_USER_NOTICE
);
return null;
}
public function __isset($name)
{
if (array_key_exists($name, $this->_collection_uris) || array_key_exists($name, $this->_member_uris)) {
return true;
}
return false;
}
protected function _objectify($fields)
{
// initialize uris
$this->_collection_uris = array();
$this->_member_uris = array();
foreach ($fields as $key => $val) {
// nested uri
if ((strlen($key) - 3) == strrpos($key, 'uri', 0) && $key != 'uri') {
$result = self::getRegistry()->match($val);
if ($result != null) {
$name = substr($key, 0, -4);
$class = $result['class'];
if ($result['collection']) {
$this->_collection_uris[$name] = array(
'class' => $class,
'uri' => $val,
);
} else {
$this->_member_uris[$name] = array(
'class' => $class,
'uri' => $val,
);
}
continue;
}
} elseif (is_object($val) && property_exists($val, 'uri')) {
// nested
$result = self::getRegistry()->match($val->uri);
if ($result != null) {
$class = $result['class'];
if ($result['collection']) {
$this->$key = new Collection($class, $val['uri'], $val);
} else {
$this->$key = new $class($val);
}
continue;
}
} elseif (is_array($val) && array_key_exists('uri', $val)) {
$result = self::getRegistry()->match($val['uri']);
if ($result != null) {
$class = $result['class'];
if ($result['collection']) {
$this->$key = new Collection($class, $val['uri'], $val);
} else {
$this->$key = new $class($val);
}
continue;
}
}
// default
$this->$key = $val;
}
}
public static function query()
{
$uri_spec = self::getURISpec();
if ($uri_spec == null || $uri_spec->collection_uri == null) {
$msg = sprintf('Cannot directly query %s resources', get_called_class());
throw new \LogicException($msg);
}
return new Query(get_called_class(), $uri_spec->collection_uri);
}
public static function get($uri)
{
# id
if (strncmp($uri, '/', 1)) {
$uri_spec = self::getURISpec();
if ($uri_spec == null || $uri_spec->collection_uri == null) {
$msg = sprintf('Cannot get %s resources by id %s', $class, $uri);
throw new \LogicException($msg);
}
$uri = $uri_spec->collection_uri . '/' . $uri;
}
$response = self::getClient()->get($uri);
$class = get_called_class();
return new $class($response->body);
}
public function save()
{
// payload
$payload = array();
foreach ($this as $key => $val) {
if ($key[0] == '_' || is_object($val)) {
continue;
}
$payload[$key] = $val;
}
// update
if (array_key_exists('uri', $payload)) {
$uri = $payload['uri'];
unset($payload['uri']);
$response = self::getClient()->put($uri, $payload);
} else {
// create
$class = get_class($this);
if ($class::$_uri_spec == null || $class::$_uri_spec->collection_uri == null) {
$msg = sprintf('Cannot directly create %s resources', $class);
throw new \LogicException($msg);
}
$response = self::getClient()->post($class::$_uri_spec->collection_uri, $payload);
}
// re-objectify
foreach ($this as $key => $val) {
unset($this->$key);
}
$this->_objectify($response->body);
return $this;
}
public function delete()
{
self::getClient()->delete($this->uri);
return $this;
}
}

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