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 +1,43 @@
+<?php
+
+namespace App\Support\AiProviders;
+
+use App\Models\AiProvider;
+use Illuminate\Http\Client\ConnectionException;
+use Illuminate\Support\Facades\Http;
+
+/**
+ * Text generation via OpenAI's Chat Completions API. Used for scripts,
+ * metadata (titles/descriptions/tags), and similar text content.
+ */
+class OpenAiDriver implements AiProviderDriver
+{
+    public function generate(AiProvider $provider, string $prompt, array $options = []): AiGenerationResult
+    {
+        $model = $options['model'] ?? $provider->config['model'] ?? 'gpt-4o-mini';
+
+        try {
+            $response = Http::withToken($provider->api_key)
+                ->post('https://api.openai.com/v1/chat/completions', [
+                    'model' => $model,
+                    'messages' => [
+                        ['role' => 'user', 'content' => $prompt],
+                    ],
+                ]);
+        } catch (ConnectionException $e) {
+            throw new AiGenerationException("could not connect to OpenAI: {$e->getMessage()}");
+        }
+
+        if ($response->failed()) {
+            throw new AiGenerationException($response->json('error.message') ?? 'unexpected response from OpenAI');
+        }
+
+        $content = $response->json('choices.0.message.content');
+
+        if (! $content) {
+            throw new AiGenerationException('unexpected response from OpenAI: missing message content');
+        }
+
+        return new AiGenerationResult($content, 'text/plain', $response->json());
+    }
+}