REST API: implements getLink by ID service

See http://shaarli.github.io/api-documentation/#links-link-get

application/api/controllers/Links.php

@@ -4,6 +4,7 @@
 
 use Shaarli\Api\ApiUtils;
 use Shaarli\Api\Exceptions\ApiBadParametersException;
+use Shaarli\Api\Exceptions\ApiLinkNotFoundException;
 use Slim\Http\Request;
 use Slim\Http\Response;
 
@@ -58,8 +59,7 @@ public function getLinks($request, $response)
         $limit = $request->getParam('limit');
         if (empty($limit)) {
             $limit = self::$DEFAULT_LIMIT;
-        }
+        } else if (ctype_digit($limit)) {
-        else if (ctype_digit($limit)) {
             $limit = intval($limit);
         } else if ($limit === 'all') {
             $limit = count($links);
@@ -83,4 +83,25 @@ public function getLinks($request, $response)
 
         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);
+    }
 }

application/api/exceptions/ApiLinkNotFoundException.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Shaarli\Api\Exceptions;
+
+
+use Slim\Http\Response;
+
+/**
+ * Class ApiLinkNotFoundException
+ *
+ * Link selected by ID couldn't be found, results in a 404 error.
+ *
+ * @package Shaarli\Api\Exceptions
+ */
+class ApiLinkNotFoundException extends ApiException
+{
+    /**
+     * ApiLinkNotFoundException constructor.
+     */
+    public function __construct()
+    {
+        $this->message = 'Link not found';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getApiResponse()
+    {
+        return $this->buildApiResponse(404);
+    }
+}

index.php

@@ -2232,12 +2232,13 @@ function resizeImage($filepath)
 $app->group('/api/v1', function() {
     $this->get('/info', '\Shaarli\Api\Controllers\Info:getInfo');
     $this->get('/links', '\Shaarli\Api\Controllers\Links:getLinks');
+    $this->get('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:getLink');
 })->add('\Shaarli\Api\ApiMiddleware');
 
 $response = $app->run(true);
 // Hack to make Slim and Shaarli router work together:
-// If a Slim route isn't found, we call renderPage().
+// If a Slim route isn't found and NOT API call, we call renderPage().
-if ($response->getStatusCode() == 404) {
+if ($response->getStatusCode() == 404 && strpos($_SERVER['REQUEST_URI'], '/api/v1') === false) {
     // We use UTF-8 for proper international characters handling.
     header('Content-Type: text/html; charset=utf-8');
     renderPage($conf, $pluginManager, $linkDb);

tests/api/controllers/GetLinkIdTest.php

@@ -0,0 +1,130 @@
+<?php
+
+namespace Shaarli\Api\Controllers;
+
+
+use Slim\Container;
+use Slim\Http\Environment;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+/**
+ * Class GetLinkIdTest
+ *
+ * Test getLink by ID API service.
+ *
+ * @see http://shaarli.github.io/api-documentation/#links-link-get
+ *
+ * @package Shaarli\Api\Controllers
+ */
+class GetLinkIdTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var string datastore to test write operations
+     */
+    protected static $testDatastore = 'sandbox/datastore.php';
+
+    /**
+     * @var \ConfigManager instance
+     */
+    protected $conf;
+
+    /**
+     * @var \ReferenceLinkDB instance.
+     */
+    protected $refDB = null;
+
+    /**
+     * @var Container instance.
+     */
+    protected $container;
+
+    /**
+     * @var Links controller instance.
+     */
+    protected $controller;
+
+    /**
+     * Number of JSON fields per link.
+     */
+    const NB_FIELDS_LINK = 9;
+
+    /**
+     * Before each test, instantiate a new Api with its config, plugins and links.
+     */
+    public function setUp()
+    {
+        $this->conf = new \ConfigManager('tests/utils/config/configJson');
+        $this->refDB = new \ReferenceLinkDB();
+        $this->refDB->write(self::$testDatastore);
+
+        $this->container = new Container();
+        $this->container['conf'] = $this->conf;
+        $this->container['db'] = new \LinkDB(self::$testDatastore, true, false);
+
+        $this->controller = new Links($this->container);
+    }
+
+    /**
+     * After each test, remove the test datastore.
+     */
+    public function tearDown()
+    {
+        @unlink(self::$testDatastore);
+    }
+
+    /**
+     * Test basic getLink service: return link ID=41.
+     */
+    public function testGetLinkId()
+    {
+        // Used by index_url().
+        $_SERVER['SERVER_NAME'] = 'domain.tld';
+        $_SERVER['SERVER_PORT'] = 80;
+        $_SERVER['SCRIPT_NAME'] = '/';
+
+        $id = 41;
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getLink($request, new Response(), ['id' => $id]);
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+        $this->assertEquals(self::NB_FIELDS_LINK, count($data));
+        $this->assertEquals($id, $data['id']);
+
+        // Check link elements
+        $this->assertEquals('http://domain.tld/?WDWyig', $data['url']);
+        $this->assertEquals('WDWyig', $data['shorturl']);
+        $this->assertEquals('Link title: @website', $data['title']);
+        $this->assertEquals(
+            'Stallman has a beard and is part of the Free Software Foundation (or not). Seriously, read this. #hashtag',
+            $data['description']
+        );
+        $this->assertEquals('sTuff', $data['tags'][0]);
+        $this->assertEquals(false, $data['private']);
+        $this->assertEquals(
+            \DateTime::createFromFormat(\LinkDB::LINK_DATE_FORMAT, '20150310_114651')->format(\DateTime::ATOM),
+            $data['created']
+        );
+        $this->assertEmpty($data['updated']);
+    }
+
+    /**
+     * Test basic getLink service: get non existent link => ApiLinkNotFoundException.
+     *
+     * @expectedException Shaarli\Api\Exceptions\ApiLinkNotFoundException
+     * @expectedExceptionMessage Link not found
+     */
+    public function testGetLink404()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $this->controller->getLink($request, new Response(), ['id' => -1]);
+    }
+}

tests/api/controllers/GetLinksTest.php

@@ -9,14 +9,15 @@
 use Slim\Http\Response;
 
 /**
- * Class LinksTest
+ * Class GetLinksTest
  *
- * Test Links REST API services.
+ * Test get Link list REST API service.
- * Note that api call results are tightly related to data contained in ReferenceLinkDB.
+ *
+ * @see http://shaarli.github.io/api-documentation/#links-links-collection-get
  *
  * @package Shaarli\Api\Controllers
  */
-class LinksTest extends \PHPUnit_Framework_TestCase
+class GetLinksTest extends \PHPUnit_Framework_TestCase
 {
     /**
      * @var string datastore to test write operations
@@ -53,7 +54,7 @@ class LinksTest extends \PHPUnit_Framework_TestCase
      */
     public function setUp()
     {
-        $this->conf = new \ConfigManager('tests/utils/config/configJson.json.php');
+        $this->conf = new \ConfigManager('tests/utils/config/configJson');
         $this->refDB = new \ReferenceLinkDB();
         $this->refDB->write(self::$testDatastore);
 
@@ -100,7 +101,7 @@ public function testGetLinks()
             $this->assertEquals($order[$cpt++], $link['id']);
         }
 
-        // Check first element fields\
+        // Check first element fields
         $first = $data[0];
         $this->assertEquals('http://domain.tld/?WDWyig', $first['url']);
         $this->assertEquals('WDWyig', $first['shorturl']);