feature #910 [Platform] OllamaApiCatalog improved (Guikingone)

This PR was squashed before being merged into the main branch.

Discussion
----------

[Platform] `OllamaApiCatalog` improved

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Docs?         | yes
| Issues        | None
| License       | MIT

Commits
-------

572d30b [Platform] `OllamaApiCatalog` improved

Author: OskarStark

src/platform/src/Bridge/Ollama/OllamaApiCatalog.php

@@ -13,38 +13,25 @@
 
 use Symfony\AI\Platform\Capability;
 use Symfony\AI\Platform\Exception\InvalidArgumentException;
-use Symfony\AI\Platform\ModelCatalog\FallbackModelCatalog;
+use Symfony\AI\Platform\ModelCatalog\ModelCatalogInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 /**
  * @author Guillaume Loulier <[email protected]>
  */
-final class OllamaApiCatalog extends FallbackModelCatalog
+final class OllamaApiCatalog implements ModelCatalogInterface
 {
     public function __construct(
         private readonly string $host,
         private readonly HttpClientInterface $httpClient,
     ) {
-        parent::__construct();
     }
 
     public function getModel(string $modelName): Ollama
     {
-        $model = parent::getModel($modelName);
-
-        if (\array_key_exists($model->getName(), $this->models)) {
-            $finalModel = $this->models[$model->getName()];
-
-            return new $finalModel['class'](
-                $model->getName(),
-                $finalModel['capabilities'],
-                $model->getOptions(),
-            );
-        }
-
         $response = $this->httpClient->request('POST', \sprintf('%s/api/show', $this->host), [
             'json' => [
-                'model' => $model->getName(),
+                'model' => $modelName,
             ],
         ]);
 
@@ -66,13 +53,27 @@ public function getModel(string $modelName): Ollama
             $payload['capabilities'],
         );
 
-        $finalModel = new Ollama($model->getName(), $capabilities, $model->getOptions());
+        return new Ollama($modelName, $capabilities);
+    }
 
-        $this->models[$finalModel->getName()] = [
-            'class' => Ollama::class,
-            'capabilities' => $finalModel->getCapabilities(),
-        ];
+    public function getModels(): array
+    {
+        $response = $this->httpClient->request('POST', \sprintf('%s/api/tags', $this->host));
+
+        $models = $response->toArray();
 
-        return $finalModel;
+        return array_merge(...array_map(
+            function (array $model): array {
+                $retrievedModel = $this->getModel($model['name']);
+
+                return [
+                    $retrievedModel->getName() => [
+                        'class' => Ollama::class,
+                        'capabilities' => $retrievedModel->getCapabilities(),
+                    ],
+                ];
+            },
+            $models['models'],
+        ));
     }
 }

src/platform/tests/Bridge/Ollama/OllamaApiCatalogTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\AI\Platform\Tests\Bridge\Ollama;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\AI\Platform\Bridge\Ollama\Ollama;
 use Symfony\AI\Platform\Bridge\Ollama\OllamaApiCatalog;
 use Symfony\AI\Platform\Capability;
 use Symfony\Component\HttpClient\MockHttpClient;
@@ -37,4 +38,36 @@ public function testModelCatalogCanReturnModelFromApi()
         ], $model->getCapabilities());
         $this->assertSame(1, $httpClient->getRequestsCount());
     }
+
+    public function testModelCatalogCanReturnModelsFromApi()
+    {
+        $httpClient = new MockHttpClient([
+            new JsonMockResponse([
+                'models' => [
+                    [
+                        'name' => 'gemma3',
+                        'details' => [],
+                    ],
+                ],
+            ]),
+            new JsonMockResponse([
+                'capabilities' => ['completion'],
+            ]),
+        ]);
+
+        $modelCatalog = new OllamaApiCatalog('http://127.0.0.1:11434', $httpClient);
+
+        $models = $modelCatalog->getModels();
+
+        $this->assertCount(1, $models);
+        $this->assertArrayHasKey('gemma3', $models);
+
+        $model = $models['gemma3'];
+        $this->assertSame(Ollama::class, $model['class']);
+        $this->assertCount(1, $model['capabilities']);
+        $this->assertSame([
+            Capability::INPUT_TEXT,
+        ], $model['capabilities']);
+        $this->assertSame(2, $httpClient->getRequestsCount());
+    }
 }