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<?php defined("SYSPATH") or die("No direct script access.");
/**
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2010 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
class rest_Core {
const API_VERSION = "3.0";
static function reply($data=array()) {
Session::instance()->abort_save();
header("X-Gallery-API-Version: " . rest::API_VERSION);
switch (Input::instance()->get("output", "json")) {
case "json":
json::reply($data);
break;
case "jsonp":
if (!($callback = Input::instance()->get("callback", ""))) {
throw new Rest_Exception(
"Bad Request", 400, array("errors" => array("callback" => "missing")));
}
if (preg_match('/^[$A-Za-z_][0-9A-Za-z_]*$/', $callback) == 1) {
header("Content-type: application/javascript; charset=UTF-8");
print "$callback(" . json_encode($data) . ")";
} else {
throw new Rest_Exception(
"Bad Request", 400, array("errors" => array("callback" => "invalid")));
}
break;
case "html":
header("Content-type: text/html; charset=UTF-8");
if ($data) {
$html = preg_replace(
"#([\w]+?://[\w]+[^ \'\"\n\r\t<]*)#ise", "'<a href=\"\\1\" >\\1</a>'",
var_export($data, 1));
} else {
$html = t("Empty response");
}
print "<pre>$html</pre>";
if (Session::instance()->get("profiler", false)) {
Profiler::enable();
$profiler = new Profiler();
$profiler->render();
}
break;
default:
throw new Rest_Exception("Bad Request", 400);
}
}
static function set_active_user($access_key) {
if (empty($access_key)) {
if (module::get_var("rest", "allow_guest_access")) {
identity::set_active_user(identity::guest());
return;
} else {
throw new Rest_Exception("Forbidden", 403);
}
}
$key = ORM::factory("user_access_key")
->where("access_key", "=", $access_key)
->find();
if (!$key->loaded()) {
throw new Rest_Exception("Forbidden", 403);
}
$user = identity::lookup_user($key->user_id);
if (empty($user)) {
throw new Rest_Exception("Forbidden", 403);
}
identity::set_active_user($user);
}
static function reset_access_key() {
$key = ORM::factory("user_access_key")
->where("user_id", "=", identity::active_user()->id)
->find();
if ($key->loaded()) {
$key->delete();
}
return rest::access_key();
}
static function access_key() {
$key = ORM::factory("user_access_key")
->where("user_id", "=", identity::active_user()->id)
->find();
if (!$key->loaded()) {
$key->user_id = identity::active_user()->id;
$key->access_key = md5(random::hash() . access::private_key());
$key->save();
}
return $key->access_key;
}
/**
* Convert a REST url into an object.
* Eg:
* http://example.com/gallery3/index.php/rest/item/35 -> Item_Model
* http://example.com/gallery3/index.php/rest/tag/16 -> Tag_Model
* http://example.com/gallery3/index.php/rest/tagged_item/1,16 -> [Tag_Model, Item_Model]
*
* @param string the fully qualified REST url
* @return mixed the corresponding object (usually a model of some kind)
*/
static function resolve($url) {
if ($suffix = Kohana::config('core.url_suffix')) {
$relative_url = substr($url, strlen(url::abs_site("rest")) - strlen($suffix));
} else {
$relative_url = substr($url, strlen(url::abs_site("rest")));
}
$path = parse_url($relative_url, PHP_URL_PATH);
$components = explode("/", $path, 3);
if (count($components) != 3) {
throw new Kohana_404_Exception($url);
}
$class = "$components[1]_rest";
if (!method_exists($class, "resolve")) {
throw new Kohana_404_Exception($url);
}
return call_user_func(array($class, "resolve"), !empty($components[2]) ? $components[2] : null);
}
/**
* Return an absolute url used for REST resource location.
* @param string resource type (eg, "item", "tag")
* @param object resource
*/
static function url() {
$args = func_get_args();
$resource_type = array_shift($args);
$class = "{$resource_type}_rest";
if (!method_exists($class, "url")) {
throw new Rest_Exception("Bad Request", 400);
}
$url = call_user_func_array(array($class, "url"), $args);
if (Input::instance()->get("output") == "html") {
if (strpos($url, "?") === false) {
$url .= "?output=html";
} else {
$url .= "&output=html";
}
}
return $url;
}
static function relationships($resource_type, $resource) {
$results = array();
foreach (module::active() as $module) {
foreach (glob(MODPATH . "{$module->name}/helpers/*_rest.php") as $filename) {
$class = str_replace(".php", "", basename($filename));
if (method_exists($class, "relationships")) {
if ($tmp = call_user_func(array($class, "relationships"), $resource_type, $resource)) {
$results = array_merge($results, $tmp);
}
}
}
}
return $results;
}
}
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