47 lines
1.4 KiB
PHP
47 lines
1.4 KiB
PHP
<?php
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namespace App\Services;
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use App\Exceptions\OllamaUnavailableException;
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use App\Models\EmbeddingCache;
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use Illuminate\Support\Facades\Http;
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use Throwable;
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class EmbeddingService
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{
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public function embed(string $text): array
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{
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$hash = hash('sha256', $text);
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$cached = EmbeddingCache::query()->where('text_hash', $hash)->first();
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if ($cached !== null) {
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return $cached->embedding;
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}
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$baseUrl = rtrim((string) config('services.ollama.base_url'), '/');
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try {
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$response = Http::timeout((int) config('services.ollama.timeout', 30))
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->post($baseUrl.'/api/embeddings', [
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'model' => config('services.ollama.embed_model', 'nomic-embed-text'),
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'prompt' => $text,
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])
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->throw()
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->json();
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} catch (Throwable $e) {
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throw new OllamaUnavailableException('Ollama embedding endpoint is unavailable', 0, $e);
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}
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$embedding = $response['embedding'] ?? [];
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if (!is_array($embedding) || $embedding === []) {
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throw new OllamaUnavailableException('Ollama embedding response did not include a valid embedding');
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}
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EmbeddingCache::query()->updateOrCreate(
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['text_hash' => $hash],
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['text' => $text, 'embedding' => $embedding]
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);
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return $embedding;
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}
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} |