104 lines
3.4 KiB
PHP
104 lines
3.4 KiB
PHP
<?php
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namespace App\Core;
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/**
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* Gemini AI Integration for Invoice Extraction
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*/
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class AI
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{
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private static string $baseUrl = "https://generativelanguage.googleapis.com/v1beta/models/gemini-flash-lite-latest:generateContent";
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/**
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* Extract Data from Invoice Image or PDF (Base64)
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*/
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public static function extractInvoiceData(string $base64Data, string $mimeType): ?array
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{
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$apiKey = env('GEMINI_API_KEY');
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if (!$apiKey) {
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error_log('AI Error: GEMINI_API_KEY is missing');
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return null;
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}
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$prompt = "You are an expert in Jordanian E-Invoicing (UBL 2.1).
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Extract all data from this invoice image/document into a JSON format.
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Strict Rules:
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1. Ensure numeric values are numbers, not strings.
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2. Identify the Supplier TIN (Tax Identification Number) and Buyer TIN (if present).
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3. Identify if the invoice is 'Cash' or 'Credit'.
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4. Identify if it is 'Simplified' (B2C) or 'Standard' (B2B).
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5. Extract line items precisely.
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6. Return ONLY valid JSON, no markdown formatting.
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Required JSON Structure:
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{
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\"invoice_number\": \"\",
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\"invoice_date\": \"YYYY-MM-DD\",
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\"invoice_type\": \"cash|credit\",
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\"invoice_category\": \"simplified|standard\",
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\"supplier_tin\": \"\",
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\"supplier_name\": \"\",
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\"supplier_address\": \"\",
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\"buyer_tin\": \"\",
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\"buyer_name\": \"\",
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\"buyer_national_id\": \"\",
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\"subtotal\": 0.000,
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\"tax_amount\": 0.000,
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\"discount_total\": 0.000,
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\"grand_total\": 0.000,
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\"currency\": \"JOD\",
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\"items\": [
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{
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\"description\": \"\",
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\"quantity\": 0,
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\"unit_price\": 0.000,
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\"tax_amount\": 0.000,
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\"total\": 0.000
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}
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]
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}";
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$payload = [
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"contents" => [
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[
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"parts" => [
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["text" => $prompt],
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[
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"inline_data" => [
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"mime_type" => $mimeType,
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"data" => $base64Data
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]
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]
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]
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]
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],
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"generationConfig" => [
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"response_mime_type" => "application/json"
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]
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];
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$ch = curl_init(self::$baseUrl . "?key=" . $apiKey);
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curl_setopt($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, ['Content-Type: application/json']);
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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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error_log("AI Error: Gemini API returned code $httpCode. Response: " . $response);
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return null;
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}
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$result = json_decode($response, true);
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$textResponse = $result['candidates'][0]['content']['parts'][0]['text'] ?? null;
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if (!$textResponse) return null;
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return json_decode($textResponse, true);
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}
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}
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