85 lines
2.5 KiB
PHP
85 lines
2.5 KiB
PHP
<?php
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declare(strict_types=1);
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namespace App\Services\AI;
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use App\Services\AI\Contracts\AIProviderInterface;
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use Exception;
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final class OpenAIProvider implements AIProviderInterface
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{
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private string $apiKey;
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private string $model;
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public function __construct()
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{
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$this->apiKey = $_ENV['OPENAI_API_KEY'] ?? '';
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$this->model = $_ENV['OPENAI_MODEL'] ?? 'gpt-4o-mini';
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}
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public function isConfigured(): bool
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{
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return !empty($this->apiKey);
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}
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public function extractInvoiceData(string $fileContent, string $mimeType, string $prompt): array
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{
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if (!$this->isConfigured()) {
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throw new Exception("OpenAI API Key is missing. Please configure it in .env");
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}
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$base64Data = base64_encode($fileContent);
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$payload = [
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'model' => $this->model,
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'messages' => [
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[
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'role' => 'user',
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'content' => [
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[
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'type' => 'text',
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'text' => $prompt
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],
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[
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'type' => 'image_url',
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'image_url' => [
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'url' => "data:{$mimeType};base64,{$base64Data}"
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]
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]
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]
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]
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],
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'response_format' => ['type' => 'json_object'],
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'temperature' => 0.1
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];
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$ch = curl_init('https://api.openai.com/v1/chat/completions');
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_POST, true);
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curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
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curl_setopt($ch, CURLOPT_HTTPHEADER, [
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'Content-Type: application/json',
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"Authorization: Bearer {$this->apiKey}"
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]);
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$response = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode !== 200) {
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throw new Exception("OpenAI Extraction failed. HTTP Code: {$httpCode}. Response: {$response}");
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}
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$result = json_decode($response, true);
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$text = $result['choices'][0]['message']['content'] ?? '{}';
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$data = json_decode($text, true);
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if (!is_array($data)) {
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throw new Exception("Failed to parse OpenAI output as JSON: {$text}");
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}
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return $data;
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}
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}
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