fetch(
"SELECT * FROM message_templates WHERE id = ?",
[$templateId]
);
if (!$template) {
throw new Exception('Plantilla no encontrada');
}
// Obtener textos de la plantilla
$bodyText = $template['body_text'] ?? '';
$headerText = $template['header_text'] ?? null;
$footerText = $template['footer_text'] ?? null;
// Obtener variables guardadas para saber sus placeholders
$exampleParams = json_decode($template['example_parameters'] ?? '{}', true);
$savedVariables = $exampleParams['variables'] ?? [];
// Reemplazar variables en el body
$bodyPreview = $bodyText;
if (is_array($parameters)) {
// Si tenemos variables guardadas, usar sus placeholders
if (!empty($savedVariables)) {
foreach ($savedVariables as $var) {
$index = $var['index'] - 1; // Convertir a índice de array (0-based)
if (isset($parameters[$index])) {
$placeholder = $var['placeholder']; // Ejemplo: {{nombre_tema}} o {{1}}
$bodyPreview = str_replace($placeholder, $parameters[$index], $bodyPreview);
}
}
} else {
// Fallback: reemplazar variables numéricas estándar
foreach ($parameters as $index => $value) {
$placeholder = '{{' . ($index + 1) . '}}';
$bodyPreview = str_replace($placeholder, $value, $bodyPreview);
}
}
}
// Reemplazar variables en el header si existen
$headerPreview = $headerText;
if ($headerText && is_array($parameters)) {
if (!empty($savedVariables)) {
foreach ($savedVariables as $var) {
$index = $var['index'] - 1;
if (isset($parameters[$index])) {
$placeholder = $var['placeholder'];
$headerPreview = str_replace($placeholder, $parameters[$index], $headerPreview);
}
}
} else {
foreach ($parameters as $index => $value) {
$placeholder = '{{' . ($index + 1) . '}}';
$headerPreview = str_replace($placeholder, $value, $headerPreview);
}
}
}
// Verificar si quedan variables sin reemplazar (tanto numéricas como con nombres)
$hasUnreplacedVars = preg_match('/\{\{[^\}]+\}\}/', $bodyPreview);
// Generar vista previa HTML
$htmlPreview = '';
if ($headerPreview) {
$htmlPreview .= '';
}
$htmlPreview .= '';
$htmlPreview .= nl2br(htmlspecialchars($bodyPreview));
$htmlPreview .= '
';
if ($footerText) {
$htmlPreview .= '';
}
echo json_encode([
'success' => true,
'preview' => [
'body' => $bodyPreview,
'header' => $headerPreview,
'footer' => $footerText,
'html' => $htmlPreview,
'has_unreplaced_variables' => $hasUnreplacedVars,
'is_complete' => !$hasUnreplacedVars
]
], JSON_UNESCAPED_UNICODE);
} catch (Exception $e) {
error_log("Error in preview_template.php: " . $e->getMessage());
http_response_code(500);
echo json_encode([
'success' => false,
'error' => $e->getMessage()
]);
}