Add AI provider abstraction and asset storage (tasks #33, #34)

AiProviderDriver: one generic interface (generate(prompt, options) -> AiGenerationResult) rather than per-capability interfaces, since text (OpenAI chat completions), image (StabilityAI stable-image), and speech (ElevenLabs TTS) generation all reduce to prompt-in/content-out. Drivers throw AiGenerationException on failure; AiProviderManager resolves the right driver from an AiProvider record's `provider` column and guards on is_active. Real request/response shapes per each provider's API, verified with Http::fake() — no live API keys available yet to smoke test against the real services. AssetStorage: stores generated content under video-projects/{id}/{type}/v{n}.{ext}, versioned per (project, type[, step]) slot so retries don't clobber earlier output, plus contents/url/delete and pruneOldVersions for cleanup. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-06 20:47:06 +03:00
parent a4ff6c0ccb
commit 0e315ada04
14 changed files with 657 additions and 0 deletions
@@ -0,0 +1,63 @@
+<?php
+
+use App\Models\AiProvider;
+use App\Support\AiProviders\AiGenerationException;
+use App\Support\AiProviders\StabilityAiDriver;
+use Illuminate\Support\Facades\Http;
+
+test('it generates an image successfully', function () {
+    $bytes = 'fake-png-bytes';
+
+    Http::fake([
+        'api.stability.ai/*' => Http::response([
+            'image' => base64_encode($bytes),
+            'seed' => 42,
+            'finish_reason' => 'SUCCESS',
+        ], 200),
+    ]);
+
+    $provider = AiProvider::factory()->create(['provider' => 'stability_ai', 'api_key' => 'sk-test']);
+
+    $result = (new StabilityAiDriver)->generate($provider, 'a red bicycle');
+
+    expect($result->content)->toBe($bytes);
+    expect($result->contentType)->toBe('image/png');
+    expect($result->raw['seed'])->toBe(42);
+
+    Http::assertSent(function ($request) {
+        return $request->url() === 'https://api.stability.ai/v2beta/stable-image/generate/core'
+            && $request->hasHeader('Authorization', 'Bearer sk-test');
+    });
+});
+
+test('it respects an output_format override', function () {
+    Http::fake([
+        'api.stability.ai/*' => Http::response(['image' => base64_encode('bytes')]),
+    ]);
+
+    $provider = AiProvider::factory()->create(['provider' => 'stability_ai']);
+
+    $result = (new StabilityAiDriver)->generate($provider, 'prompt', ['output_format' => 'webp']);
+
+    expect($result->contentType)->toBe('image/webp');
+});
+
+test('it throws when StabilityAI returns an error', function () {
+    Http::fake([
+        'api.stability.ai/*' => Http::response(['errors' => ['invalid prompt']], 400),
+    ]);
+
+    $provider = AiProvider::factory()->create(['provider' => 'stability_ai']);
+
+    (new StabilityAiDriver)->generate($provider, 'prompt');
+})->throws(AiGenerationException::class, 'invalid prompt');
+
+test('it throws when the response has no image data', function () {
+    Http::fake([
+        'api.stability.ai/*' => Http::response(['finish_reason' => 'CONTENT_FILTERED']),
+    ]);
+
+    $provider = AiProvider::factory()->create(['provider' => 'stability_ai']);
+
+    (new StabilityAiDriver)->generate($provider, 'prompt');
+})->throws(AiGenerationException::class);