88 lines
2.6 KiB
PHP
88 lines
2.6 KiB
PHP
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<?php
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namespace App\Support\VideoWorkflow\StepHandlers;
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use App\Models\AiProvider;
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use App\Models\WorkflowStep;
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use App\Support\AiProviders\AiGenerationException;
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use App\Support\AiProviders\AiProviderManager;
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use App\Support\AssetStorage\AssetStorage;
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use App\Support\VideoWorkflow\WorkflowEngine;
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/**
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* Turns a project's title/description (or an explicit outline) into a full
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* script via an OpenAI-backed AiProvider, with optional tone/SEO-keyword/
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* length guidance from the step's input.
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*/
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class ScriptGenerationHandler implements StepHandler
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{
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public function __construct(
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private readonly AiProviderManager $aiProviders,
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private readonly AssetStorage $assets,
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) {}
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public function type(): string
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{
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return 'script_generation';
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}
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public function handle(WorkflowStep $step, WorkflowEngine $engine): void
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{
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$provider = AiProvider::query()->where('provider', 'openai')->where('is_active', true)->first();
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if (! $provider) {
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$engine->failStep($step, 'No active OpenAI provider configured.');
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return;
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}
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try {
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$result = $this->aiProviders->generate($provider, $this->buildPrompt($step));
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} catch (AiGenerationException $e) {
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$engine->failStep($step, $e->getMessage());
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return;
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}
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$asset = $this->assets->store(
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$step->videoProject,
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'script',
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$result->content,
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'txt',
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step: $step,
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mimeType: 'text/plain',
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);
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$engine->completeStep($step, [
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'asset_id' => $asset->id,
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'word_count' => str_word_count($result->content),
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]);
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}
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private function buildPrompt(WorkflowStep $step): string
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{
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$input = $step->input ?? [];
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$project = $step->videoProject;
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$outline = $input['outline'] ?? trim(($project->title ?? '')."\n\n".($project->description ?? ''));
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$prompt = "Write a complete, engaging YouTube video script.\n\nTopic/Outline:\n{$outline}";
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if (! empty($input['tone'])) {
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$prompt .= "\n\nTone: {$input['tone']}";
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}
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if (! empty($input['seo_keywords'])) {
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$prompt .= "\n\nNaturally include these SEO keywords where relevant: ".implode(', ', $input['seo_keywords']);
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}
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if (! empty($input['target_words'])) {
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$prompt .= "\n\nTarget length: approximately {$input['target_words']} words.";
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}
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$prompt .= "\n\nWrite only the script content, no preamble or explanation.";
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return $prompt;
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}
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}
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