API: Get History endpoint

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

application/api/controllers/History.php

@@ -0,0 +1,71 @@
+<?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)
+    {
+        $history = (new \History($this->conf->get('resource.history')))->getHistory();
+        $history = array_reverse($history);
+
+        // 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);
+    }
+}

index.php

@@ -2253,6 +2253,7 @@ function resizeImage($filepath)
     $this->post('/links', '\Shaarli\Api\Controllers\Links:postLink')->setName('postLink');
     $this->put('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:putLink')->setName('putLink');
     $this->delete('/links/{id:[\d]+}', '\Shaarli\Api\Controllers\Links:deleteLink')->setName('deleteLink');
+    $this->get('/history', '\Shaarli\Api\Controllers\History:getHistory')->setName('getHistory');
 })->add('\Shaarli\Api\ApiMiddleware');
 
 $response = $app->run(true);

tests/api/controllers/HistoryTest.php

@@ -0,0 +1,221 @@
+<?php
+
+
+namespace Shaarli\Api\Controllers;
+
+
+use Shaarli\Config\ConfigManager;
+use Slim\Container;
+use Slim\Http\Environment;
+use Slim\Http\Request;
+use Slim\Http\Response;
+
+require_once 'tests/utils/ReferenceHistory.php';
+
+class HistoryTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @var string datastore to test write operations
+     */
+    protected static $testHistory = 'sandbox/history.php';
+
+    /**
+     * @var ConfigManager instance
+     */
+    protected $conf;
+
+    /**
+     * @var \ReferenceHistory instance.
+     */
+    protected $refHistory = null;
+
+    /**
+     * @var \History instance.
+     */
+    protected $history;
+
+    /**
+     * @var Container instance.
+     */
+    protected $container;
+
+    /**
+     * @var History controller instance.
+     */
+    protected $controller;
+
+    /**
+     * Before every test, instantiate a new Api with its config, plugins and links.
+     */
+    public function setUp()
+    {
+        $this->conf = new ConfigManager('tests/utils/config/configJson.json.php');
+        $this->refHistory = new \ReferenceHistory();
+        $this->refHistory->write(self::$testHistory);
+        $this->conf->set('resource.history', self::$testHistory);
+        $this->container = new Container();
+        $this->container['conf'] = $this->conf;
+        $this->container['db'] = true;
+
+        $this->controller = new History($this->container);
+    }
+
+    /**
+     * After every test, remove the test datastore.
+     */
+    public function tearDown()
+    {
+        @unlink(self::$testHistory);
+    }
+
+    /**
+     * Test /history service without parameter.
+     */
+    public function testGetHistory()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getHistory($request, new Response());
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+
+        $this->assertEquals($this->refHistory->count(), count($data));
+
+        $this->assertEquals(\History::DELETED, $data[0]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170303_121216')->format(\DateTime::ATOM),
+            $data[0]['datetime']
+        );
+        $this->assertEquals(124, $data[0]['id']);
+
+        $this->assertEquals(\History::SETTINGS, $data[1]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170302_121215')->format(\DateTime::ATOM),
+            $data[1]['datetime']
+        );
+        $this->assertNull($data[1]['id']);
+
+        $this->assertEquals(\History::UPDATED, $data[2]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170301_121214')->format(\DateTime::ATOM),
+            $data[2]['datetime']
+        );
+        $this->assertEquals(123, $data[2]['id']);
+
+        $this->assertEquals(\History::CREATED, $data[3]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170201_121214')->format(\DateTime::ATOM),
+            $data[3]['datetime']
+        );
+        $this->assertEquals(124, $data[3]['id']);
+
+        $this->assertEquals(\History::CREATED, $data[4]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170101_121212')->format(\DateTime::ATOM),
+            $data[4]['datetime']
+        );
+        $this->assertEquals(123, $data[4]['id']);
+    }
+
+    /**
+     * Test /history service with limit parameter.
+     */
+    public function testGetHistoryLimit()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+            'QUERY_STRING' => 'limit=1'
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getHistory($request, new Response());
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+
+        $this->assertEquals(1, count($data));
+
+        $this->assertEquals(\History::DELETED, $data[0]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170303_121216')->format(\DateTime::ATOM),
+            $data[0]['datetime']
+        );
+        $this->assertEquals(124, $data[0]['id']);
+    }
+
+    /**
+     * Test /history service with offset parameter.
+     */
+    public function testGetHistoryOffset()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+            'QUERY_STRING' => 'offset=4'
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getHistory($request, new Response());
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+
+        $this->assertEquals(1, count($data));
+
+        $this->assertEquals(\History::CREATED, $data[0]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170101_121212')->format(\DateTime::ATOM),
+            $data[0]['datetime']
+        );
+        $this->assertEquals(123, $data[0]['id']);
+    }
+
+    /**
+     * Test /history service with since parameter.
+     */
+    public function testGetHistorySince()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+            'QUERY_STRING' => 'since=2017-03-03T00:00:00%2B00:00'
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getHistory($request, new Response());
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+
+        $this->assertEquals(1, count($data));
+
+        $this->assertEquals(\History::DELETED, $data[0]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170303_121216')->format(\DateTime::ATOM),
+            $data[0]['datetime']
+        );
+        $this->assertEquals(124, $data[0]['id']);
+    }
+
+    /**
+     * Test /history service with since parameter.
+     */
+    public function testGetHistorySinceOffsetLimit()
+    {
+        $env = Environment::mock([
+            'REQUEST_METHOD' => 'GET',
+            'QUERY_STRING' => 'since=2017-02-01T00:00:00%2B00:00&offset=1&limit=1'
+        ]);
+        $request = Request::createFromEnvironment($env);
+
+        $response = $this->controller->getHistory($request, new Response());
+        $this->assertEquals(200, $response->getStatusCode());
+        $data = json_decode((string) $response->getBody(), true);
+
+        $this->assertEquals(1, count($data));
+
+        $this->assertEquals(\History::SETTINGS, $data[0]['event']);
+        $this->assertEquals(
+            \DateTime::createFromFormat('Ymd_His', '20170302_121215')->format(\DateTime::ATOM),
+            $data[0]['datetime']
+        );
+    }
+}

tests/utils/ReferenceHistory.php

@@ -0,0 +1,82 @@
+<?php
+
+/**
+ * Populates a reference history
+ */
+class ReferenceHistory
+{
+    private $count;
+
+    private $history = [];
+
+    /**
+     * Populates the test DB with reference data
+     */
+    public function __construct()
+    {
+        $this->addEntry(
+            History::CREATED,
+            DateTime::createFromFormat('Ymd_His', '20170101_121212'),
+            123
+        );
+
+        $this->addEntry(
+            History::CREATED,
+            DateTime::createFromFormat('Ymd_His', '20170201_121214'),
+            124
+        );
+
+        $this->addEntry(
+            History::UPDATED,
+            DateTime::createFromFormat('Ymd_His', '20170301_121214'),
+            123
+        );
+
+        $this->addEntry(
+            History::SETTINGS,
+            DateTime::createFromFormat('Ymd_His', '20170302_121215')
+        );
+
+        $this->addEntry(
+            History::DELETED,
+            DateTime::createFromFormat('Ymd_His', '20170303_121216'),
+            124
+        );
+    }
+
+    /**
+     * Adds a new history entry
+     *
+     * @param string   $event    Event identifier
+     * @param DateTime $datetime creation date
+     * @param int      $id       optional: related link ID
+     */
+    protected function addEntry($event, $datetime, $id = null)
+    {
+        $link = [
+            'event' => $event,
+            'datetime' => $datetime,
+            'id' => $id,
+        ];
+        $this->history[] = $link;
+        $this->count++;
+    }
+
+    /**
+     * Writes data to the datastore
+     *
+     * @param string $filename write history content to.
+     */
+    public function write($filename)
+    {
+        FileUtils::writeFlatDB($filename, $this->history);
+    }
+
+    /**
+     * Returns the number of links in the reference data
+     */
+    public function count()
+    {
+        return $this->count;
+    }
+}