deepseek_chatbot/api/chatbot.php

<?php
require_once 'CsvReader.php';

header('Content-Type: application/json');

// only accept POST requests
if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    http_response_code(405);
    echo json_encode(['error' => 'Only POST allowed']);
    exit;
}

function extractPdfText($file) {
    $tmp = tempnam(sys_get_temp_dir(), 'pdftext');
    exec("pdftotext " . escapeshellarg($file) . " " . escapeshellarg($tmp));
    $text = file_get_contents($tmp);
    unlink($tmp);
    return $text ?: '';
}

// ### Build prompt for deepseek
$input = json_decode(file_get_contents('php://input'), true);
$question = isset($input['question']) ? $input['question'] : '';
$roleFile = __DIR__ . '/data/role.txt';
$role = file_exists($roleFile) ? file_get_contents($roleFile) : '';

$reader = new CsvReader(__DIR__ . '/data/csv');
$rows = $reader->readAll();
$contextText = "";
foreach ($rows as $row) {
    $contextText .= "- " . implode(" | ", $row) . "\n";
}
$pdf1 = extractPdfText(__DIR__ . '/data/pdf/onboarding.pdf');
$pdf2 = extractPdfText(__DIR__ . '/data/pdf/urlaub.pdf');

$pdfContext = "\n\nAus Onboarding-Dokument:\n" . $pdf1 . "\n\nAus Urlaubsdokument:\n" . $pdf2;

$prompt = "Deine Rolle ist: ". $role;
$prompt .= "\nDeine Frage ist: " . $question;
$prompt .= "\nCSV-Daten:\n" . $contextText;
$prompt .= "\nPDF-Kontext:\n" . $pdfContext;

$payload = json_encode([
    "model" => "deepseek-r1",
    "prompt" => $prompt,
    "stream" => false
]);

// ### Send Request
$ch = curl_init('http://localhost:11434/api/generate');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);

// ### Prepare Response
$responseText = isset($data['response']) ? $data['response'] : 'No answer from Deepseek!';
$responseText = preg_replace('/<think>.*?<\/think>/s', ' ', $responseText);
$responseText = trim($responseText);

echo json_encode([
    'reply' => $responseText,
    'misc' => $pdfContext
]);