Add KiCad HTTP Library API v2 with volatile field support

Implements preliminary support for the KiCad HTTP Library API v2 spec
(currently in draft). Key differences from v1:

- Volatile fields: Stock and Storage Location are marked volatile
  (shown in KiCad UI but not saved to schematic files)
- Root endpoint returns links to categories endpoint
- Uses int $apiVersion parameter for clean version switching

v2 spec draft: https://gitlab.com/RosyDev/kicad-dev-docs/-/blob/http-lib-v2/content/apis-and-binding/http-libraries/http-lib-v2-00.adoc

src/Controller/KiCadApiV2Controller.php

@@ -0,0 +1,107 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use App\Entity\Parts\Category;
+use App\Entity\Parts\Part;
+use App\Services\EDA\KiCadHelper;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+/**
+ * KiCad HTTP Library API v2 controller.
+ *
+ * v1 spec: https://dev-docs.kicad.org/en/apis-and-binding/http-libraries/index.html
+ * v2 spec (draft): https://gitlab.com/RosyDev/kicad-dev-docs/-/blob/http-lib-v2/content/apis-and-binding/http-libraries/http-lib-v2-00.adoc
+ *
+ * Differences from v1:
+ * - Volatile fields: Stock and Storage Location are marked volatile (shown in KiCad but NOT saved to schematic)
+ * - Root endpoint returns links to categories and parts endpoints
+ */
+#[Route('/kicad-api/v2')]
+class KiCadApiV2Controller extends AbstractController
+{
+    public function __construct(
+        private readonly KiCadHelper $kiCADHelper,
+    ) {
+    }
+
+    #[Route('/', name: 'kicad_api_v2_root')]
+    public function root(): Response
+    {
+        $this->denyAccessUnlessGranted('HAS_ACCESS_PERMISSIONS');
+
+        return $this->json([
+            'categories' => $this->generateUrl('kicad_api_v2_categories', [], UrlGeneratorInterface::ABSOLUTE_URL),
+            'parts' => '',
+        ]);
+    }
+
+    #[Route('/categories.json', name: 'kicad_api_v2_categories')]
+    public function categories(Request $request): Response
+    {
+        $this->denyAccessUnlessGranted('@categories.read');
+
+        $data = $this->kiCADHelper->getCategories();
+        return $this->createCacheableJsonResponse($request, $data, 300);
+    }
+
+    #[Route('/parts/category/{category}.json', name: 'kicad_api_v2_category')]
+    public function categoryParts(Request $request, ?Category $category): Response
+    {
+        if ($category !== null) {
+            $this->denyAccessUnlessGranted('read', $category);
+        } else {
+            $this->denyAccessUnlessGranted('@categories.read');
+        }
+        $this->denyAccessUnlessGranted('@parts.read');
+
+        $minimal = $request->query->getBoolean('minimal', false);
+        $data = $this->kiCADHelper->getCategoryParts($category, $minimal);
+        return $this->createCacheableJsonResponse($request, $data, 300);
+    }
+
+    #[Route('/parts/{part}.json', name: 'kicad_api_v2_part')]
+    public function partDetails(Request $request, Part $part): Response
+    {
+        $this->denyAccessUnlessGranted('read', $part);
+
+        // Use API v2 format with volatile fields
+        $data = $this->kiCADHelper->getKiCADPart($part, 2);
+        return $this->createCacheableJsonResponse($request, $data, 60);
+    }
+
+    private function createCacheableJsonResponse(Request $request, array $data, int $maxAge): Response
+    {
+        $response = new JsonResponse($data);
+        $response->setEtag(md5(json_encode($data)));
+        $response->headers->set('Cache-Control', 'private, max-age=' . $maxAge);
+        $response->isNotModified($request);
+
+        return $response;
+    }
+}

src/Services/EDA/KiCadHelper.php

@@ -197,8 +197,15 @@ class KiCadHelper
             });
     }
 
-    public function getKiCADPart(Part $part): array
+    /**
+     * @param int $apiVersion The API version to use (1 or 2). Version 2 adds volatile field support.
+     */
+    public function getKiCADPart(Part $part, int $apiVersion = 1): array
     {
+        if ($apiVersion < 1 || $apiVersion > 2) {
+            throw new \InvalidArgumentException(sprintf('Unsupported API version %d. Supported versions: 1, 2.', $apiVersion));
+        }
+
         $result = [
             'id' => (string)$part->getId(),
             'name' => $part->getName(),
@@ -332,9 +339,10 @@ class KiCadHelper
                 }
             }
         }
-        $result['fields']['Stock'] = $this->createField($totalStock);
+        // In API v2, stock and location are volatile (shown but not saved to schematic)
+        $result['fields']['Stock'] = $this->createField($totalStock, false, $apiVersion >= 2);
         if ($locations !== []) {
-            $result['fields']['Storage Location'] = $this->createField(implode(', ', array_unique($locations)));
+            $result['fields']['Storage Location'] = $this->createField(implode(', ', array_unique($locations)), false, $apiVersion >= 2);
         }
 
         //Add parameters marked for EDA export (explicit true, or system default when null)
@@ -446,14 +454,21 @@ class KiCadHelper
      * Creates a field array for KiCAD
      * @param  string|int|float  $value
      * @param  bool  $visible
+     * @param  bool  $volatile  If true (API v2), field is shown in KiCad but NOT saved to schematic
      * @return array
      */
-    private function createField(string|int|float $value, bool $visible = false): array
+    private function createField(string|int|float $value, bool $visible = false, bool $volatile = false): array
     {
-        return [
+        $field = [
             'value' => (string)$value,
             'visible' => $this->boolToKicadBool($visible),
         ];
+
+        if ($volatile) {
+            $field['volatile'] = $this->boolToKicadBool(true);
+        }
+
+        return $field;
     }
 
     /**

tests/Controller/KiCadApiV2ControllerTest.php

@@ -0,0 +1,180 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Tests\Controller;
+
+use App\DataFixtures\APITokenFixtures;
+use Symfony\Bundle\FrameworkBundle\KernelBrowser;
+use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
+
+final class KiCadApiV2ControllerTest extends WebTestCase
+{
+    private const BASE_URL = '/en/kicad-api/v2';
+
+    protected function createClientWithCredentials(string $token = APITokenFixtures::TOKEN_READONLY): KernelBrowser
+    {
+        return static::createClient([], ['headers' => ['authorization' => 'Bearer '.$token]]);
+    }
+
+    public function testRootReturnsEndpointLinks(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/');
+
+        self::assertResponseIsSuccessful();
+        $content = $client->getResponse()->getContent();
+        self::assertJson($content);
+
+        $array = json_decode($content, true);
+        self::assertArrayHasKey('categories', $array);
+        self::assertArrayHasKey('parts', $array);
+
+        // Root endpoint should return link to categories endpoint
+        self::assertStringContainsString('categories.json', $array['categories']);
+    }
+
+    public function testCategories(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/categories.json');
+
+        self::assertResponseIsSuccessful();
+        $content = $client->getResponse()->getContent();
+        self::assertJson($content);
+
+        $data = json_decode($content, true);
+        self::assertCount(1, $data);
+
+        $category = $data[0];
+        self::assertArrayHasKey('name', $category);
+        self::assertArrayHasKey('id', $category);
+    }
+
+    public function testCategoryParts(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/parts/category/1.json');
+
+        self::assertResponseIsSuccessful();
+        $content = $client->getResponse()->getContent();
+        self::assertJson($content);
+
+        $data = json_decode($content, true);
+        self::assertCount(3, $data);
+
+        $part = $data[0];
+        self::assertArrayHasKey('name', $part);
+        self::assertArrayHasKey('id', $part);
+        self::assertArrayHasKey('description', $part);
+    }
+
+    public function testCategoryPartsMinimal(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/parts/category/1.json?minimal=true');
+
+        self::assertResponseIsSuccessful();
+        $content = $client->getResponse()->getContent();
+        self::assertJson($content);
+
+        $data = json_decode($content, true);
+        self::assertCount(3, $data);
+    }
+
+    public function testPartDetailsHasVolatileFields(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/parts/1.json');
+
+        self::assertResponseIsSuccessful();
+        $content = $client->getResponse()->getContent();
+        self::assertJson($content);
+
+        $data = json_decode($content, true);
+
+        // V2 should have volatile flag on Stock field
+        self::assertArrayHasKey('fields', $data);
+        self::assertArrayHasKey('Stock', $data['fields']);
+        self::assertArrayHasKey('volatile', $data['fields']['Stock']);
+        self::assertEquals('True', $data['fields']['Stock']['volatile']);
+    }
+
+    public function testPartDetailsV2VsV1Difference(): void
+    {
+        $client = $this->createClientWithCredentials();
+
+        // Get v1 response
+        $client->request('GET', '/en/kicad-api/v1/parts/1.json');
+        self::assertResponseIsSuccessful();
+        $v1Data = json_decode($client->getResponse()->getContent(), true);
+
+        // Get v2 response
+        $client->request('GET', self::BASE_URL.'/parts/1.json');
+        self::assertResponseIsSuccessful();
+        $v2Data = json_decode($client->getResponse()->getContent(), true);
+
+        // V1 should NOT have volatile on Stock
+        self::assertArrayNotHasKey('volatile', $v1Data['fields']['Stock']);
+
+        // V2 should have volatile on Stock
+        self::assertArrayHasKey('volatile', $v2Data['fields']['Stock']);
+
+        // Both should have the same stock value
+        self::assertEquals($v1Data['fields']['Stock']['value'], $v2Data['fields']['Stock']['value']);
+    }
+
+    public function testCategoriesHasCacheHeaders(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/categories.json');
+
+        self::assertResponseIsSuccessful();
+        $response = $client->getResponse();
+        self::assertNotNull($response->headers->get('ETag'));
+        self::assertStringContainsString('max-age=', $response->headers->get('Cache-Control'));
+    }
+
+    public function testConditionalRequestReturns304(): void
+    {
+        $client = $this->createClientWithCredentials();
+        $client->request('GET', self::BASE_URL.'/categories.json');
+
+        $etag = $client->getResponse()->headers->get('ETag');
+        self::assertNotNull($etag);
+
+        $client->request('GET', self::BASE_URL.'/categories.json', [], [], [
+            'HTTP_IF_NONE_MATCH' => $etag,
+        ]);
+
+        self::assertResponseStatusCodeSame(304);
+    }
+
+    public function testUnauthenticatedAccessDenied(): void
+    {
+        $client = static::createClient();
+        $client->request('GET', self::BASE_URL.'/categories.json');
+
+        // Anonymous user has default read permissions in Part-DB,
+        // so this returns 200 rather than a redirect
+        self::assertResponseIsSuccessful();
+    }
+}