4 files changed, 400 insertions, 0 deletions

diff --git a/application/api/controllers/ApiController.php b/application/api/controllers/ApiController.php
new file mode 100644
index 00000000..3be85b98
--- /dev/null
+++ b/application/api/controllers/ApiController.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace Shaarli\Api\Controllers;
+
+use Shaarli\Config\ConfigManager;
+use \Slim\Container;
+
+/**
+ * Abstract Class ApiController
+ *
+ * Defines REST API Controller dependencies injected from the container.
+ *
+ * @package Api\Controllers
+ */
+abstract class ApiController
+{
+    /**
+     * @var Container
+     */
+    protected $ci;
+
+    /**
+     * @var ConfigManager
+     */
+    protected $conf;
+
+    /**
+     * @var \LinkDB
+     */
+    protected $linkDb;
+
+    /**
+     * @var \History
+     */
+    protected $history;
+
+    /**
+     * @var int|null JSON style option.
+     */
+    protected $jsonStyle;
+
+    /**
+     * ApiController constructor.
+     * 
+     * Note: enabling debug mode displays JSON with readable formatting.
+     *
+     * @param Container $ci Slim container.
+     */
+    public function __construct(Container $ci)
+    {
+        $this->ci = $ci;
+        $this->conf = $ci->get('conf');
+        $this->linkDb = $ci->get('db');
+        $this->history = $ci->get('history');
+        if ($this->conf->get('dev.debug', false)) {
+            $this->jsonStyle = JSON_PRETTY_PRINT;
+        } else {
+            $this->jsonStyle = null;
+        }
+    }
+
+    /**
+     * Get the container.
+     *
+     * @return Container
+     */
+    public function getCi()
+    {
+        return $this->ci;
+    }
+}
diff --git a/application/api/controllers/History.php b/application/api/controllers/History.php
new file mode 100644
index 00000000..2ff9deaf
--- /dev/null
+++ b/application/api/controllers/History.php
@@ -0,0 +1,70 @@
+<?php
+
+
+namespace Shaarli\Api\Controllers;
+
+use Shaarli\Api\Exceptions\ApiBadParametersException;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Class History
+ *
+ * REST API Controller: /history
+ *
+ * @package Shaarli\Api\Controllers
+ */
+class History extends ApiController
+{
+    /**
+     * Service providing operation regarding Shaarli datastore and settings.
+     *
+     * @param Request  $request  Slim request.
+     * @param Response $response Slim response.
+     *
+     * @return Response response.
+     *
+     * @throws ApiBadParametersException Invalid parameters.
+     */
+    public function getHistory($request, $response)
+    {
+        $history = $this->history->getHistory();
+
+        // Return history operations from the {offset}th, starting from {since}.
+        $since = \DateTime::createFromFormat(\DateTime::ATOM, $request->getParam('since'));
+        $offset = $request->getParam('offset');
+        if (empty($offset)) {
+            $offset = 0;
+        }
+        else if (ctype_digit($offset)) {
+            $offset = (int) $offset;
+        } else {
+            throw new ApiBadParametersException('Invalid offset');
+        }
+
+        // limit parameter is either a number of links or 'all' for everything.
+        $limit = $request->getParam('limit');
+        if (empty($limit)) {
+            $limit = count($history);
+        } else if (ctype_digit($limit)) {
+            $limit = (int) $limit;
+        } else {
+            throw new ApiBadParametersException('Invalid limit');
+        }
+
+        $out = [];
+        $i = 0;
+        foreach ($history as $entry) {
+            if ((! empty($since) && $entry['datetime'] <= $since) || count($out) >= $limit) {
+                break;
+            }
+            if (++$i > $offset) {
+                $out[$i] = $entry;
+                $out[$i]['datetime'] = $out[$i]['datetime']->format(\DateTime::ATOM);
+            }
+        }
+        $out = array_values($out);
+
+        return $response->withJson($out, 200, $this->jsonStyle);
+    }
+}
diff --git a/application/api/controllers/Info.php b/application/api/controllers/Info.php
new file mode 100644
index 00000000..25433f72
--- /dev/null
+++ b/application/api/controllers/Info.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Shaarli\Api\Controllers;
+
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Class Info
+ * 
+ * REST API Controller: /info
+ *
+ * @package Api\Controllers
+ * @see http://shaarli.github.io/api-documentation/#links-instance-information-get
+ */
+class Info extends ApiController
+{
+    /**
+     * Service providing various information about Shaarli instance.
+     * 
+     * @param Request  $request  Slim request.
+     * @param Response $response Slim response.
+     *
+     * @return Response response.
+     */
+    public function getInfo($request, $response)
+    {
+        $info = [
+            'global_counter' => count($this->linkDb),
+            'private_counter' => count_private($this->linkDb),
+            'settings' => array(
+                'title' => $this->conf->get('general.title', 'Shaarli'),
+                'header_link' => $this->conf->get('general.header_link', '?'),
+                'timezone' => $this->conf->get('general.timezone', 'UTC'),
+                'enabled_plugins' => $this->conf->get('general.enabled_plugins', []),
+                'default_private_links' => $this->conf->get('privacy.default_private_links', false),
+            ),
+        ];
+
+        return $response->withJson($info, 200, $this->jsonStyle);
+    }
+}
diff --git a/application/api/controllers/Links.php b/application/api/controllers/Links.php
new file mode 100644
index 00000000..eb78dd26
--- /dev/null
+++ b/application/api/controllers/Links.php
@@ -0,0 +1,217 @@
+<?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);
+    }
+}