73 lines
2.5 KiB
PHP
73 lines
2.5 KiB
PHP
<?php
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class GeminiAi {
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private $apiKey;
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// Updated to the requested model
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private $model = "gemini-flash-lite-latest";
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private $baseUrl = "https://generativelanguage.googleapis.com/v1beta/models/";
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public function __construct($apiKey) {
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if (empty($apiKey)) {
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throw new Exception("Gemini API Key is missing.");
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}
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$this->apiKey = $apiKey;
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}
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public function verifyPayment($invoiceNumber, $amount, $paymentMethod, $proofText, $proofImageBase64 = '') {
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$prompt = "You are a financial verifier. The user claims they transferred $amount via $paymentMethod for invoice $invoiceNumber. ";
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if (!empty($proofText)) {
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$prompt .= "Here is their proof text: '$proofText'. ";
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}
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$prompt .= "Does the provided proof clearly indicate a successful transfer of $amount? Respond ONLY with a valid JSON object: {\"verified\": true/false, \"reason\": \"your reasoning\"}.";
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$parts = [["text" => $prompt]];
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if (!empty($proofImageBase64)) {
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$parts[] = [
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"inline_data" => [
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"mime_type" => "image/jpeg",
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"data" => $proofImageBase64
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]
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];
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}
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$reqData = [
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"contents" => [
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[
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"parts" => $parts
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]
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]
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];
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$url = $this->baseUrl . $this->model . ":generateContent?key=" . $this->apiKey;
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$ch = curl_init($url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_POST, true);
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curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
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curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($reqData));
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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("Gemini API Error: " . $response);
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throw new Exception("AI Verification service unavailable. Details: " . $response);
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}
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$resData = json_decode($response, true);
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$aiText = $resData['candidates'][0]['content']['parts'][0]['text'] ?? '';
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// Clean AI Text (remove markdown json block if exists)
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$aiText = preg_replace('/```json|```/', '', $aiText);
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$aiResult = json_decode(trim($aiText), true);
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if ($aiResult && isset($aiResult['verified'])) {
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return $aiResult;
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}
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throw new Exception("Invalid response format from Gemini: " . $aiText);
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}
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}
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?>
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