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+<?php
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+/**
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+ * pdf-files/headlessChrome_pdf.php
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+ *
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+ * Generic headless Chrome PDF generator.
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+ * Renders any registered report type to a native Chrome PDF.
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+ *
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+ * GET params:
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+ * type string Report type key (see $reportTypes below)
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+ * rid int Primary record ID
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+ * rand string Security token (soil_records.rand / plant_records.rand etc.)
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+ * cid int Client ID (optional, passed through to print page)
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+ * stid string Soil/crop type (optional, passed through)
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+ *
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+ * Usage examples:
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+ * /pdf-files/headlessChrome_pdf.php?type=soil&rid=123&rand=abc
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+ * /pdf-files/headlessChrome_pdf.php?type=soil-combined&rid=123&rand=abc
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+ * /pdf-files/headlessChrome_pdf.php?type=plant&rid=456&rand=def&cid=12
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+ *
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+ * To add a new report type: add an entry to $reportTypes below.
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+ */
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+
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+require_once __DIR__ . '/../config/database.php';
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+require_once __DIR__ . '/../lib/auth.php';
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+require_once __DIR__ . '/../vendor/autoload.php';
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+
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+use daandesmedt\PHPHeadlessChrome\HeadlessChrome;
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+
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+if (session_status() === PHP_SESSION_NONE) {
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+ session_start();
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+}
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+
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+requireLogin();
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+
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+// ── Input ─────────────────────────────────────────────────────────────────────
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+$type = trim($_GET['type'] ?? 'soil');
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+$recordId = (int) ($_GET['rid'] ?? 0);
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+$randId = trim( $_GET['rand'] ?? '');
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+$clientId = (int) ($_GET['cid'] ?? 0);
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+$stid = trim( $_GET['stid'] ?? '');
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+
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+// ── Report type registry ──────────────────────────────────────────────────────
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+//
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+// 'print_page' — path relative to site root; {rid}, {rand}, {cid}, {stid}
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+// placeholders are substituted at runtime
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+// 'verify_table' — DB table used to verify the rand token before generating
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+// 'filename' — prefix for the downloaded PDF filename
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+// 'label' — human-readable name (for error messages)
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+//
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+$reportTypes = [
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+ // Individual pages
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+ 'soil-analysis' => [
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+ 'print_page' => '/dashboard/crop-analysis/soil-test-data/soil-analysis.php?rid={rid}&rand={rand}&cid={cid}&stid={stid}&print=1',
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+ 'verify_table' => 'soil_records',
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+ 'filename' => 'soil-analysis',
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+ 'label' => 'Soil Analysis',
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+ ],
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+ 'soil-report' => [
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+ 'print_page' => '/dashboard/crop-analysis/soil-test-data/soil-report-pdf.php?rid={rid}&rand={rand}',
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+ 'verify_table' => 'soil_records',
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+ 'filename' => 'soil-report',
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+ 'label' => 'Soil Report',
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+ ],
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+ // Combined: analysis + AI report in one PDF
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+ 'soil' => [
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+ 'print_page' => '/dashboard/crop-analysis/soil-test-data/soil-print-combined.php?rid={rid}&rand={rand}&cid={cid}&stid={stid}',
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+ 'verify_table' => 'soil_records',
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+ 'filename' => 'soil-analysis-report',
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+ 'label' => 'Soil Analysis & Report',
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+ ],
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+ // Plant
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+ 'plant-analysis' => [
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+ 'print_page' => '/dashboard/crop-analysis/plant-test-data/plant-analysis-print.php?rid={rid}&rand={rand}&cid={cid}',
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+ 'verify_table' => 'plant_records',
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+ 'filename' => 'plant-analysis',
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+ 'label' => 'Plant Analysis',
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+ ],
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+ 'plant-report' => [
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+ 'print_page' => '/dashboard/crop-analysis/plant-test-data/plant-report-pdf.php?rid={rid}&rand={rand}',
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+ 'verify_table' => 'plant_records',
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+ 'filename' => 'plant-report',
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+ 'label' => 'Plant Report',
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+ ],
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+ 'plant' => [
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+ 'print_page' => '/dashboard/crop-analysis/plant-test-data/plant-print-combined.php?rid={rid}&rand={rand}&cid={cid}',
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+ 'verify_table' => 'plant_records',
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+ 'filename' => 'plant-analysis-report',
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+ 'label' => 'Plant Analysis & Report',
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+ ],
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+ // Water
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+ 'water' => [
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+ 'print_page' => '/dashboard/crop-analysis/water-test-data/water-print-combined.php?rid={rid}&rand={rand}&cid={cid}',
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+ 'verify_table' => 'water_records',
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+ 'filename' => 'water-analysis-report',
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+ 'label' => 'Water Analysis & Report',
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+ ],
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+ // Animal
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+ 'animal' => [
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+ 'print_page' => '/dashboard/crop-analysis/animal-dietary-balance/animal-print-combined.php?rid={rid}&rand={rand}&cid={cid}',
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+ 'verify_table' => 'animal_records',
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+ 'filename' => 'animal-dietary-report',
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+ 'label' => 'Animal Dietary Report',
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+ ],
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+];
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+
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+if (!isset($reportTypes[$type])) {
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+ http_response_code(400);
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+ $valid = implode(', ', array_keys($reportTypes));
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+ die("Unknown report type \"" . htmlspecialchars($type, ENT_QUOTES, 'UTF-8') . "\". Valid types: $valid");
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+}
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+
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+$config = $reportTypes[$type];
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+
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+if ($recordId <= 0 || $randId === '') {
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+ http_response_code(400);
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+ die('Missing required parameters: rid, rand');
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+}
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+
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+// ── Verify record exists via its table ───────────────────────────────────────
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+$pdo = getDBConnection();
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+$table = $config['verify_table'];
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+
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+// Allowlist the table name against known tables to prevent SQL injection
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+$allowedTables = ['soil_records', 'plant_records', 'water_records', 'animal_records'];
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+if (!in_array($table, $allowedTables, true)) {
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+ http_response_code(500);
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+ die('Invalid verify_table in report type config.');
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+}
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+
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+$stmt = $pdo->prepare("SELECT lab_no FROM `{$table}` WHERE id = ? AND rand = ? LIMIT 1");
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+$stmt->execute([$recordId, $randId]);
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+$record = $stmt->fetch();
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+
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+if (!$record) {
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+ http_response_code(404);
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+ die('Record not found or access denied.');
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+}
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+
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+// ── Write one-time print token ────────────────────────────────────────────────
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+$token = bin2hex(random_bytes(16));
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+$expires = time() + 120;
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+
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+$tokenDir = __DIR__ . '/tokens';
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+if (!is_dir($tokenDir)) {
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+ mkdir($tokenDir, 0750, true);
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+}
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+
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+file_put_contents($tokenDir . '/' . $token . '.tmp', json_encode([
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+ 'rid' => $recordId,
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+ 'rand' => $randId,
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+ 'expires' => $expires,
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+ 'type' => $type,
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+]));
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+
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+// ── Build print page URL ──────────────────────────────────────────────────────
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+$scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
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+$host = $_SERVER['HTTP_HOST'] ?? 'localhost';
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+$baseUrl = $scheme . '://' . $host;
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+
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+$printPath = str_replace(
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+ ['{rid}', '{rand}', '{cid}', '{stid}'],
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+ [$recordId, urlencode($randId), $clientId, urlencode($stid)],
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+ $config['print_page']
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+);
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+
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+$printUrl = $baseUrl . $printPath . '&ptoken=' . urlencode($token);
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+
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+// ── Output directory + filename ───────────────────────────────────────────────
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+$outputDir = __DIR__;
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+$today = date('Y-m-d');
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+$labNo = preg_replace('/[^A-Za-z0-9\-_]/', '_', $record['lab_no'] ?? $recordId);
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+$filename = $config['filename'] . '-' . $labNo . '-' . $today;
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+
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+// ── Headless Chrome ───────────────────────────────────────────────────────────
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+$chromeBinary = '/usr/bin/google-chrome';
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+foreach (['/usr/bin/google-chrome', '/usr/bin/chromium-browser', '/usr/bin/chromium'] as $bin) {
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+ if (file_exists($bin)) { $chromeBinary = $bin; break; }
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+}
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+
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+$arguments = [
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+ '--headless' => '',
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+ '--disable-gpu' => '',
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+ '--hide-scrollbars' => '',
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+ '--enable-viewport' => '',
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+ '--disable-web-security' => '',
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+ '--run-all-compositor-stages-before-draw' => '',
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+ '--virtual-time-budget' => '60000',
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+ '--timeout=' => '8000',
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+ '--no-sandbox' => '',
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+ '--disable-setuid-sandbox' => '',
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+];
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+
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+try {
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+ $chrome = new HeadlessChrome();
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+ $chrome->disablePDFHeader();
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+ $chrome->setUrl($printUrl);
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+ $chrome->setBinaryPath($chromeBinary);
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+ $chrome->setOutputDirectory($outputDir);
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+ $chrome->setChromeArguments($arguments);
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+ $chrome->toPDF($filename . '.pdf');
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+
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+ $pdfPath = $chrome->getFilePath();
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+} catch (Exception $e) {
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+ error_log('HeadlessChrome PDF error [' . $type . ']: ' . $e->getMessage());
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+ @unlink($tokenDir . '/' . $token . '.tmp');
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+ http_response_code(500);
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+ die('PDF generation failed: ' . htmlspecialchars($e->getMessage(), ENT_QUOTES, 'UTF-8'));
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+}
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+
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+@unlink($tokenDir . '/' . $token . '.tmp');
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+
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+// ── Stream PDF ────────────────────────────────────────────────────────────────
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+if (!file_exists($pdfPath)) {
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+ http_response_code(500);
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+ die('PDF file was not created. Ensure Chrome is installed at: ' . $chromeBinary);
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+}
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+
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+chmod($pdfPath, 0644);
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+
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+header('Content-Type: application/pdf');
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+header('Content-Disposition: attachment; filename="' . $filename . '.pdf"');
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+header('Content-Length: ' . filesize($pdfPath));
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+header('Expires: 0');
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+header('Cache-Control: must-revalidate');
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+header('Pragma: public');
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+
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+readfile($pdfPath);
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+
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+@unlink($pdfPath);
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+exit;
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