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<?php
namespace Shaarli\Api\Controllers;
use Shaarli\Api\ApiUtils;
use Shaarli\Api\Exceptions\ApiBadParametersException;
use Shaarli\Api\Exceptions\ApiLinkNotFoundException;
use Slim\Http\Request;
use Slim\Http\Response;
/**
* Class Links
*
* REST API Controller: all services related to links collection.
*
* @package Api\Controllers
* @see http://shaarli.github.io/api-documentation/#links-links-collection
*/
class Links extends ApiController
{
/**
* @var int Number of links returned if no limit is provided.
*/
public static $DEFAULT_LIMIT = 20;
/**
* Retrieve a list of links, allowing different filters.
*
* @param Request $request Slim request.
* @param Response $response Slim response.
*
* @return Response response.
*
* @throws ApiBadParametersException Invalid parameters.
*/
public function getLinks($request, $response)
{
$private = $request->getParam('visibility');
$links = $this->linkDb->filterSearch(
[
'searchtags' => $request->getParam('searchtags', ''),
'searchterm' => $request->getParam('searchterm', ''),
],
false,
$private
);
// Return links from the {offset}th link, starting from 0.
$offset = $request->getParam('offset');
if (! empty($offset) && ! ctype_digit($offset)) {
throw new ApiBadParametersException('Invalid offset');
}
$offset = ! empty($offset) ? intval($offset) : 0;
if ($offset > count($links)) {
return $response->withJson([], 200, $this->jsonStyle);
}
// limit parameter is either a number of links or 'all' for everything.
$limit = $request->getParam('limit');
if (empty($limit)) {
$limit = self::$DEFAULT_LIMIT;
} else if (ctype_digit($limit)) {
$limit = intval($limit);
} else if ($limit === 'all') {
$limit = count($links);
} else {
throw new ApiBadParametersException('Invalid limit');
}
// 'environment' is set by Slim and encapsulate $_SERVER.
$index = index_url($this->ci['environment']);
$out = [];
$cpt = 0;
foreach ($links as $link) {
if (count($out) >= $limit) {
break;
}
if ($cpt++ >= $offset) {
$out[] = ApiUtils::formatLink($link, $index);
}
}
return $response->withJson($out, 200, $this->jsonStyle);
}
/**
* Return a single formatted link by its ID.
*
* @param Request $request Slim request.
* @param Response $response Slim response.
* @param array $args Path parameters. including the ID.
*
* @return Response containing the link array.
*
* @throws ApiLinkNotFoundException generating a 404 error.
*/
public function getLink($request, $response, $args)
{
if (!isset($this->linkDb[$args['id']])) {
throw new ApiLinkNotFoundException();
}
$index = index_url($this->ci['environment']);
$out = ApiUtils::formatLink($this->linkDb[$args['id']], $index);
return $response->withJson($out, 200, $this->jsonStyle);
}
/**
* Creates a new link from posted request body.
*
* @param Request $request Slim request.
* @param Response $response Slim response.
*
* @return Response response.
*/
public function postLink($request, $response)
{
$data = $request->getParsedBody();
$link = ApiUtils::buildLinkFromRequest($data, $this->conf->get('privacy.default_private_links'));
// duplicate by URL, return 409 Conflict
if (! empty($link['url']) && ! empty($dup = $this->linkDb->getLinkFromUrl($link['url']))) {
return $response->withJson(
ApiUtils::formatLink($dup, index_url($this->ci['environment'])),
409,
$this->jsonStyle
);
}
$link['id'] = $this->linkDb->getNextId();
$link['shorturl'] = link_small_hash($link['created'], $link['id']);
// note: general relative URL
if (empty($link['url'])) {
$link['url'] = '?' . $link['shorturl'];
}
if (empty($link['title'])) {
$link['title'] = $link['url'];
}
$this->linkDb[$link['id']] = $link;
$this->linkDb->save($this->conf->get('resource.page_cache'));
$this->history->addLink($link);
$out = ApiUtils::formatLink($link, index_url($this->ci['environment']));
$redirect = $this->ci->router->relativePathFor('getLink', ['id' => $link['id']]);
return $response->withAddedHeader('Location', $redirect)
->withJson($out, 201, $this->jsonStyle);
}
/**
* Updates an existing link from posted request body.
*
* @param Request $request Slim request.
* @param Response $response Slim response.
* @param array $args Path parameters. including the ID.
*
* @return Response response.
*
* @throws ApiLinkNotFoundException generating a 404 error.
*/
public function putLink($request, $response, $args)
{
if (! isset($this->linkDb[$args['id']])) {
throw new ApiLinkNotFoundException();
}
$index = index_url($this->ci['environment']);
$data = $request->getParsedBody();
$requestLink = ApiUtils::buildLinkFromRequest($data, $this->conf->get('privacy.default_private_links'));
// duplicate URL on a different link, return 409 Conflict
if (! empty($requestLink['url'])
&& ! empty($dup = $this->linkDb->getLinkFromUrl($requestLink['url']))
&& $dup['id'] != $args['id']
) {
return $response->withJson(
ApiUtils::formatLink($dup, $index),
409,
$this->jsonStyle
);
}
$responseLink = $this->linkDb[$args['id']];
$responseLink = ApiUtils::updateLink($responseLink, $requestLink);
$this->linkDb[$responseLink['id']] = $responseLink;
$this->linkDb->save($this->conf->get('resource.page_cache'));
$this->history->updateLink($responseLink);
$out = ApiUtils::formatLink($responseLink, $index);
return $response->withJson($out, 200, $this->jsonStyle);
}
/**
* Delete an existing link by its ID.
*
* @param Request $request Slim request.
* @param Response $response Slim response.
* @param array $args Path parameters. including the ID.
*
* @return Response response.
*
* @throws ApiLinkNotFoundException generating a 404 error.
*/
public function deleteLink($request, $response, $args)
{
if (! isset($this->linkDb[$args['id']])) {
throw new ApiLinkNotFoundException();
}
$link = $this->linkDb[$args['id']];
unset($this->linkDb[(int) $args['id']]);
$this->linkDb->save($this->conf->get('resource.page_cache'));
$this->history->deleteLink($link);
return $response->withStatus(204);
}
}
|
