Initial commit - Last War messaging system

telegram/TelegramSender.php

@@ -0,0 +1,338 @@
+<?php
+
+namespace Telegram;
+
+class TelegramSender
+{
+    private string $token;
+    private string $baseUrl = 'https://api.telegram.org/bot';
+
+    public function __construct()
+    {
+        $this->token = $_ENV['TELEGRAM_BOT_TOKEN'] ?? getenv('TELEGRAM_BOT_TOKEN');
+    }
+
+    public function sendMessage(int $chatId, string $text, ?array $keyboard = null, ?string $parseMode = 'HTML'): array
+    {
+        $data = [
+            'chat_id' => $chatId,
+            'text' => $text,
+            'parse_mode' => $parseMode
+        ];
+
+        if ($keyboard) {
+            $data['reply_markup'] = json_encode($keyboard);
+        }
+
+        return $this->request('sendMessage', $data);
+    }
+
+    public function editMessageText(int $chatId, int $messageId, string $text, ?array $keyboard = null, ?string $parseMode = 'HTML'): array
+    {
+        $data = [
+            'chat_id' => $chatId,
+            'message_id' => $messageId,
+            'text' => $text,
+            'parse_mode' => $parseMode
+        ];
+
+        if ($keyboard) {
+            $data['reply_markup'] = json_encode($keyboard);
+        }
+
+        return $this->request('editMessageText', $data);
+    }
+
+    public function sendPhoto(int $chatId, string $photo, ?string $caption = null, ?array $keyboard = null): array
+    {
+        $data = [
+            'chat_id' => $chatId,
+            'photo' => $photo
+        ];
+
+        if ($caption) {
+            $data['caption'] = $caption;
+            $data['parse_mode'] = 'HTML';
+        }
+
+        if ($keyboard) {
+            $data['reply_markup'] = json_encode($keyboard);
+        }
+
+        return $this->request('sendPhoto', $data);
+    }
+
+    public function sendMediaGroup(int $chatId, array $photos, ?string $caption = null): array
+    {
+        $media = [];
+        foreach ($photos as $index => $photo) {
+            $media[] = [
+                'type' => 'photo',
+                'media' => $photo,
+                'caption' => $index === 0 ? $caption : null,
+                'parse_mode' => 'HTML'
+            ];
+        }
+
+        $data = [
+            'chat_id' => $chatId,
+            'media' => json_encode($media)
+        ];
+
+        return $this->request('sendMediaGroup', $data);
+    }
+
+    public function deleteMessage(int $chatId, int $messageId): array
+    {
+        return $this->request('deleteMessage', [
+            'chat_id' => $chatId,
+            'message_id' => $messageId
+        ]);
+    }
+
+    public function answerCallbackQuery(string $callbackQueryId, string $text, ?bool $showAlert = false)
+    {
+        return $this->request('answerCallbackQuery', [
+            'callback_query_id' => $callbackQueryId,
+            'text' => $text,
+            'show_alert' => $showAlert
+        ]);
+    }
+
+    public function getChat(int $chatId): array
+    {
+        return $this->request('getChat', ['chat_id' => $chatId]);
+    }
+
+    public function getChatAdministrators(int $chatId): array
+    {
+        return $this->request('getChatAdministrators', ['chat_id' => $chatId]);
+    }
+
+    public function leaveChat(int $chatId): array
+    {
+        return $this->request('leaveChat', ['chat_id' => $chatId]);
+    }
+
+    public function setChatMenuButton(?int $chatId = null, ?array $menuButton = null): array
+    {
+        $data = [];
+        
+        if ($chatId !== null) {
+            $data['chat_id'] = $chatId;
+        }
+        
+        if ($menuButton !== null) {
+            $data['menu_button'] = json_encode($menuButton);
+        }
+
+        return $this->request('setChatMenuButton', $data);
+    }
+
+    public function createInlineKeyboard(array $buttons): array
+    {
+        $keyboard = ['inline_keyboard' => []];
+        
+        foreach ($buttons as $button) {
+            $buttonData = ['text' => $button['text']];
+            
+            if (isset($button['callback_data'])) {
+                $buttonData['callback_data'] = $button['callback_data'];
+            } elseif (isset($button['url'])) {
+                $buttonData['url'] = $button['url'];
+            }
+            
+            $keyboard['inline_keyboard'][] = [$buttonData];
+        }
+        
+        return $keyboard;
+    }
+
+    public function createReplyKeyboard(array $buttons, ?bool $resize = true, ?bool $oneTime = false): array
+    {
+        $keyboard = [
+            'keyboard' => [],
+            'resize_keyboard' => $resize,
+            'one_time_keyboard' => $oneTime
+        ];
+        
+        foreach ($buttons as $row) {
+            $rowButtons = [];
+            foreach ($row as $button) {
+                $rowButtons[] = [
+                    'text' => $button['text'],
+                    'request_contact' => $button['request_contact'] ?? false,
+                    'request_location' => $button['request_location'] ?? false
+                ];
+            }
+            $keyboard['keyboard'][] = $rowButtons;
+        }
+        
+        return $keyboard;
+    }
+
+    public function removeKeyboard(): array
+    {
+        return ['remove_keyboard' => true];
+    }
+
+    private function request(string $method, array $data)
+    {
+        $url = $this->baseUrl . $this->token . '/' . $method;
+        
+        $ch = curl_init($url);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($ch, CURLOPT_POST, true);
+        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
+
+        $response = curl_exec($ch);
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+
+        // answerCallbackQuery returns true (boolean) on success
+        if ($response === 'true') {
+            return true;
+        }
+
+        $result = json_decode($response, true);
+
+        if (!$result || !($result['ok'] ?? false)) {
+            throw new \Exception("Telegram API Error: " . ($result['description'] ?? 'Unknown error'));
+        }
+
+        return $result['result'];
+    }
+
+    /**
+     * Parsear HTML y dividirlo en segmentos manteniendo el orden
+     * Retorna array de ['type' => 'text|image', 'content' => '...', 'src' => '...']
+     */
+    public function parseContent(string $html): array
+    {
+        $segments = [];
+        
+        // Usar regex para encontrar todas las etiquetas <img>
+        $pattern = '/<img[^>]+src=["\']([^"\']+)["\'][^>]*>/i';
+        $parts = preg_split($pattern, $html, -1, PREG_SPLIT_DELIM_CAPTURE);
+        
+        // El array parts alterna entre: [texto, src_imagen, texto, src_imagen, texto...]
+        for ($i = 0; $i < count($parts); $i++) {
+            if ($i % 2 === 0) {
+                // Es texto
+                $text = $this->htmlToPlainText($parts[$i]);
+                if (!empty(trim($text))) {
+                    $segments[] = [
+                        'type' => 'text',
+                        'content' => $text
+                    ];
+                }
+            } else {
+                // Es una imagen (el src capturado)
+                $segments[] = [
+                    'type' => 'image',
+                    'src' => $parts[$i],
+                    'content' => ''
+                ];
+            }
+        }
+        
+        return $segments;
+    }
+
+    /**
+     * Enviar contenido con texto e imágenes en el orden correcto
+     */
+    public function sendContentWithOrderedImages(int $chatId, array $segments): void
+    {
+        foreach ($segments as $segment) {
+            if ($segment['type'] === 'text') {
+                // Enviar texto
+                if (!empty(trim($segment['content']))) {
+                    $this->sendMessage($chatId, $segment['content']);
+                }
+            } elseif ($segment['type'] === 'image') {
+                $imagePath = $segment['src'];
+                
+                if (file_exists($imagePath)) {
+                    // Es un archivo local
+                    $this->sendPhoto($chatId, $imagePath);
+                } elseif (strpos($imagePath, 'http') === 0) {
+                    // Es una URL remota
+                    $this->sendPhoto($chatId, $imagePath);
+                }
+            }
+        }
+    }
+
+    /**
+     * Convertir HTML a texto plano manteniendo saltos de línea
+     */
+    private function htmlToPlainText(string $html): string
+    {
+        // Reemplazar <br>, <p>, etc. con saltos de línea
+        $text = preg_replace('/<br\s*\/?>/i', "\n", $html);
+        $text = preg_replace('/<\/p>/i', "\n", $text);
+        $text = preg_replace('/<p[^>]*>/i', '', $text);
+        $text = preg_replace('/<div[^>]*>/i', '', $text);
+        $text = preg_replace('/<\/div>/i', "\n", $text);
+        
+        // Eliminar otras etiquetas HTML
+        $text = strip_tags($text);
+        
+        // Decodificar entidades HTML
+        $text = html_entity_decode($text, ENT_QUOTES | ENT_HTML5, 'UTF-8');
+        
+        // Limpiar espacios múltiples y saltos de línea
+        $text = preg_replace('/\n{3,}/', "\n\n", $text);
+        $text = preg_replace('/[ \t]+/', ' ', $text);
+        
+        return trim($text);
+    }
+
+    public function extractImages(string $html): array
+    {
+        preg_match_all('/<img[^>]+src=["\']([^"\']+)["\'][^>]*>/i', $html, $matches);
+        return $matches[1] ?? [];
+    }
+
+    public function removeImages(string $html): string
+    {
+        return preg_replace('/<img[^>]+>/i', '', $html);
+    }
+
+    public function splitMessage(string $content, int $maxLength = 4096): array
+    {
+        if (strlen($content) <= $maxLength) {
+            return [$content];
+        }
+
+        $parts = [];
+        $lines = explode("\n", $content);
+        $currentPart = '';
+
+        foreach ($lines as $line) {
+            if (strlen($currentPart . "\n" . $line) > $maxLength) {
+                if (!empty($currentPart)) {
+                    $parts[] = $currentPart;
+                    $currentPart = '';
+                }
+                
+                if (strlen($line) > $maxLength) {
+                    $chunks = str_split($line, $maxLength);
+                    $parts = array_merge($parts, array_slice($chunks, 0, -1));
+                    $currentPart = end($chunks);
+                } else {
+                    $currentPart = $line;
+                }
+            } else {
+                $currentPart .= (empty($currentPart) ? '' : "\n") . $line;
+            }
+        }
+
+        if (!empty($currentPart)) {
+            $parts[] = $currentPart;
+        }
+
+        return $parts;
+    }
+}

telegram/actions/TelegramActions.php

@@ -0,0 +1,123 @@
+<?php
+
+namespace Telegram\Actions;
+
+use Telegram\TelegramSender;
+use Telegram\Converters\HtmlToTelegramHtmlConverter;
+
+class TelegramActions
+{
+    private TelegramSender $sender;
+    private HtmlToTelegramHtmlConverter $converter;
+
+    public function __construct()
+    {
+        $this->sender = new TelegramSender();
+        $this->converter = new HtmlToTelegramHtmlConverter();
+    }
+
+    public function sendTemplate(int $chatId, string $htmlContent, ?string $command = null): array
+    {
+        $content = $this->converter->convert($htmlContent);
+        $images = $this->converter->extractImages($htmlContent);
+
+        if (!empty($images)) {
+            $contentWithoutImages = $this->converter->removeImages($htmlContent);
+            $content = $this->converter->convert($contentWithoutImages);
+            
+            if (count($images) === 1) {
+                return $this->sender->sendPhoto($chatId, $images[0], $content);
+            }
+            
+            return $this->sender->sendMediaGroup($chatId, $images, $content);
+        }
+
+        return $this->sender->sendMessage($chatId, $content);
+    }
+
+    public function sendScheduledMessage(int $chatId, string $htmlContent, ?array $buttons = null): array
+    {
+        $content = $this->converter->convert($htmlContent);
+        $images = $this->converter->extractImages($htmlContent);
+
+        if (!empty($images)) {
+            $contentWithoutImages = $this->converter->removeImages($htmlContent);
+            $content = $this->converter->convert($contentWithoutImages);
+            
+            if ($buttons) {
+                $keyboard = $this->sender->createInlineKeyboard($buttons);
+                if (count($images) === 1) {
+                    return $this->sender->sendPhoto($chatId, $images[0], $content, $keyboard);
+                }
+                return $this->sender->sendMediaGroup($chatId, $images, $content);
+            }
+            
+            if (count($images) === 1) {
+                return $this->sender->sendPhoto($chatId, $images[0], $content);
+            }
+            
+            return $this->sender->sendMediaGroup($chatId, $images, $content);
+        }
+
+        return $this->sender->sendMessage($chatId, $content, $buttons);
+    }
+
+    public function sendWithTranslation(int $chatId, string $htmlContent, array $translations): array
+    {
+        $content = $this->converter->convert($htmlContent);
+        
+        $buttons = [];
+        foreach ($translations as $lang => $translatedText) {
+            $buttons[] = [
+                'text' => "🌐 " . strtoupper($lang),
+                'callback_data' => "translate:{$lang}"
+            ];
+        }
+
+        $keyboard = $this->sender->createInlineKeyboard($buttons);
+
+        return $this->sender->sendMessage($chatId, $content, $keyboard);
+    }
+
+    public function translateMessage(int $chatId, string $originalText, string $targetLang, string $translatedText): array
+    {
+        $message = "🌐 <b>Traducción (" . strtoupper($targetLang) . ")</b>\n\n";
+        $message .= $translatedText;
+        
+        $message .= "\n\n━━━━━━━━━━━━━━━━━\n";
+        $message .= "<i>Original:</i>\n" . $originalText;
+
+        return $this->sender->sendMessage($chatId, $message);
+    }
+
+    public function handleCallbackQuery(array $callbackData): array
+    {
+        $parts = explode(':', $callbackData['data']);
+        $action = $parts[0] ?? '';
+
+        return match ($action) {
+            'translate' => [
+                'action' => 'translate',
+                'lang' => $parts[1] ?? null
+            ],
+            default => ['action' => 'unknown']
+        };
+    }
+
+    public function sendWelcomeMessage(int $chatId, string $userName, ?string $welcomeText = null, ?string $buttonText = null, ?string $groupLink = null): array
+    {
+        $message = $welcomeText ?? "¡Hola {$userName}! 👋\n\nUsa /comandos para ver los comandos disponibles.";
+        
+        $buttons = [];
+        if ($buttonText && $groupLink) {
+            $buttons[] = [
+                'text' => $buttonText,
+                'url' => $groupLink
+            ];
+        }
+
+        $keyboard = !empty($buttons) ? $this->sender->createInlineKeyboard($buttons) : null;
+
+        return $this->sender->sendMessage($chatId, $message, $keyboard);
+    }
+}

telegram/admin/telegram_bot_interactions.php

@@ -0,0 +1,102 @@
+<?php
+require_once __DIR__ . '/../../includes/db.php';
+require_once __DIR__ . '/../../includes/session_check.php';
+require_once __DIR__ . '/../../includes/activity_logger.php';
+
+requireAdmin();
+
+$pageTitle = 'Configuración del Bot de Telegram';
+
+try {
+    $pdo = getDbConnection();
+    $stmt = $pdo->query("SELECT * FROM telegram_bot_messages WHERE id = 1");
+    $config = $stmt->fetch();
+} catch (Exception $e) {
+    $error = $e->getMessage();
+}
+
+$success = '';
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $messageText = $_POST['message_text'] ?? '';
+    $buttonText = $_POST['button_text'] ?? '';
+    $groupInviteLink = $_POST['group_invite_link'] ?? '';
+    $isActive = isset($_POST['is_active']) ? 1 : 0;
+    $registerUsers = isset($_POST['register_users']) ? 1 : 0;
+    
+    $stmt = $pdo->prepare("
+        UPDATE telegram_bot_messages 
+        SET message_text = ?, button_text = ?, group_invite_link = ?, is_active = ?, register_users = ?
+        WHERE id = 1
+    ");
+    $stmt->execute([$messageText, $buttonText, $groupInviteLink, $isActive, $registerUsers]);
+    
+    logActivity(getCurrentUserId(), 'update_telegram_config', 'Configuración del bot de Telegram actualizada');
+    $success = 'Configuración guardada correctamente';
+    
+    $stmt = $pdo->query("SELECT * FROM telegram_bot_messages WHERE id = 1");
+    $config = $stmt->fetch();
+}
+
+require_once __DIR__ . '/../../templates/header.php';
+?>
+
+<div class="d-flex justify-content-between align-items-center mb-4">
+    <h2><i class="bi bi-telegram"></i> Configuración del Bot de Telegram</h2>
+</div>
+
+<?php if ($success): ?>
+    <div class="alert alert-success"><?= htmlspecialchars($success) ?></div>
+<?php endif; ?>
+
+<?php if (isset($error)): ?>
+    <div class="alert alert-danger"><?= htmlspecialchars($error) ?></div>
+<?php endif; ?>
+
+<form method="POST">
+    <div class="card border-0 shadow-sm mb-4">
+        <div class="card-header bg-white border-0">
+            <h5 class="mb-0">Mensaje de Bienvenida</h5>
+        </div>
+        <div class="card-body">
+            <div class="mb-3">
+                <label class="form-label">Mensaje de bienvenida</label>
+                <textarea name="message_text" class="form-control" rows="5"><?= htmlspecialchars($config['message_text'] ?? '') ?></textarea>
+                <small class="text-muted">Usa <code>{user_name}</code> para el nombre del usuario</small>
+            </div>
+            
+            <div class="mb-3">
+                <label class="form-label">Texto del botón</label>
+                <input type="text" name="button_text" class="form-control" value="<?= htmlspecialchars($config['button_text'] ?? '') ?>" placeholder="Unirse al grupo">
+            </div>
+            
+            <div class="mb-3">
+                <label class="form-label">Enlace de invitación al grupo</label>
+                <input type="text" name="group_invite_link" class="form-control" value="<?= htmlspecialchars($config['group_invite_link'] ?? '') ?>" placeholder="https://t.me/...">
+            </div>
+        </div>
+    </div>
+    
+    <div class="card border-0 shadow-sm mb-4">
+        <div class="card-header bg-white border-0">
+            <h5 class="mb-0">Opciones</h5>
+        </div>
+        <div class="card-body">
+            <div class="form-check form-switch mb-3">
+                <input class="form-check-input" type="checkbox" name="is_active" id="isActive" <?= ($config['is_active'] ?? true) ? 'checked' : '' ?>>
+                <label class="form-check-label" for="isActive">Mensaje de bienvenida activo</label>
+            </div>
+            
+            <div class="form-check form-switch">
+                <input class="form-check-input" type="checkbox" name="register_users" id="registerUsers" <?= ($config['register_users'] ?? true) ? 'checked' : '' ?>>
+                <label class="form-check-label" for="registerUsers">Registrar usuarios automáticamente</label>
+            </div>
+        </div>
+    </div>
+    
+    <button type="submit" class="btn btn-primary">
+        <i class="bi bi-save"></i> Guardar Configuración
+    </button>
+</form>
+
+<?php require_once __DIR__ . '/../../templates/footer.php'; ?>

telegram/admin/telegram_welcome.php

@@ -0,0 +1,229 @@
+<?php
+require_once __DIR__ . '/../../includes/db.php';
+require_once __DIR__ . '/../../includes/session_check.php';
+require_once __DIR__ . '/../../includes/activity_logger.php';
+
+requireAdmin();
+
+$pageTitle = 'Mensajes de Bienvenida por Grupo';
+
+try {
+    $pdo = getDbConnection();
+    
+    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+        $action = $_POST['action'] ?? '';
+        
+        if ($action === 'add') {
+            $chatId = $_POST['chat_id'];
+            $welcomeMessage = $_POST['welcome_message'];
+            $buttonText = $_POST['button_text'];
+            $groupInviteLink = $_POST['group_invite_link'];
+            $languageCode = $_POST['language_code'];
+            $languageName = $_POST['language_name'];
+            $flagEmoji = $_POST['flag_emoji'];
+            $isActive = isset($_POST['is_active']) ? 1 : 0;
+            
+            $stmt = $pdo->prepare("
+                INSERT INTO telegram_welcome_messages 
+                (chat_id, welcome_message, button_text, group_invite_link, language_code, language_name, flag_emoji, is_active)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+            ");
+            $stmt->execute([$chatId, $welcomeMessage, $buttonText, $groupInviteLink, $languageCode, $languageName, $flagEmoji, $isActive]);
+            
+            logActivity(getCurrentUserId(), 'add_group_welcome', "Mensaje de bienvenida agregado para grupo: $chatId");
+            header('Location: telegram_welcome.php');
+            exit;
+            
+        } elseif ($action === 'update') {
+            $id = $_POST['id'];
+            $welcomeMessage = $_POST['welcome_message'];
+            $buttonText = $_POST['button_text'];
+            $groupInviteLink = $_POST['group_invite_link'];
+            $languageCode = $_POST['language_code'];
+            $languageName = $_POST['language_name'];
+            $flagEmoji = $_POST['flag_emoji'];
+            $isActive = isset($_POST['is_active']) ? 1 : 0;
+            
+            $stmt = $pdo->prepare("
+                UPDATE telegram_welcome_messages 
+                SET welcome_message = ?, button_text = ?, group_invite_link = ?, 
+                    language_code = ?, language_name = ?, flag_emoji = ?, is_active = ?
+                WHERE id = ?
+            ");
+            $stmt->execute([$welcomeMessage, $buttonText, $groupInviteLink, $languageCode, $languageName, $flagEmoji, $isActive, $id]);
+            
+            logActivity(getCurrentUserId(), 'update_group_welcome', "Mensaje de bienvenida actualizado ID: $id");
+            header('Location: telegram_welcome.php');
+            exit;
+            
+        } elseif ($action === 'delete') {
+            $id = $_POST['id'];
+            $stmt = $pdo->prepare("DELETE FROM telegram_welcome_messages WHERE id = ?");
+            $stmt->execute([$id]);
+            
+            logActivity(getCurrentUserId(), 'delete_group_welcome', "Mensaje de bienvenida eliminado ID: $id");
+            header('Location: telegram_welcome.php');
+            exit;
+        }
+    }
+    
+    $stmt = $pdo->query("SELECT * FROM telegram_welcome_messages ORDER BY created_at DESC");
+    $welcomeMessages = $stmt->fetchAll();
+    
+} catch (Exception $e) {
+    $error = $e->getMessage();
+}
+
+require_once __DIR__ . '/../../templates/header.php';
+?>
+
+<div class="d-flex justify-content-between align-items-center mb-4">
+    <h2><i class="bi bi-telegram"></i> Mensajes de Bienvenida por Grupo</h2>
+    <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#welcomeModal">
+        <i class="bi bi-plus-circle"></i> Nuevo Mensaje
+    </button>
+</div>
+
+<?php if (isset($error)): ?>
+    <div class="alert alert-danger"><?= htmlspecialchars($error) ?></div>
+<?php endif; ?>
+
+<div class="row">
+    <?php if (empty($welcomeMessages)): ?>
+        <div class="col-12">
+            <p class="text-muted text-center py-4">No hay mensajes de bienvenida configurados</p>
+        </div>
+    <?php else: ?>
+        <?php foreach ($welcomeMessages as $msg): ?>
+        <div class="col-md-6 mb-4">
+            <div class="card border-0 shadow-sm">
+                <div class="card-header bg-white border-0 d-flex justify-content-between align-items-center">
+                    <h6 class="mb-0"><?= htmlspecialchars($msg['flag_emoji'] ?? '') ?> <?= htmlspecialchars($msg['language_name'] ?? 'Grupo') ?></h6>
+                    <div class="btn-group btn-group-sm">
+                        <button class="btn btn-outline-primary" data-bs-toggle="modal" data-bs-target="#editModal<?= $msg['id'] ?>">
+                            <i class="bi bi-pencil"></i>
+                        </button>
+                        <form method="POST" onsubmit="return confirm('¿Eliminar?');" class="d-inline">
+                            <input type="hidden" name="action" value="delete">
+                            <input type="hidden" name="id" value="<?= $msg['id'] ?>">
+                            <button type="submit" class="btn btn-outline-danger">
+                                <i class="bi bi-trash"></i>
+                            </button>
+                        </form>
+                    </div>
+                </div>
+                <div class="card-body">
+                    <p class="text-muted small mb-1">Chat ID: <?= $msg['chat_id'] ?></p>
+                    <p class="mb-1"><?= nl2br(htmlspecialchars($msg['welcome_message'] ?? '')) ?></p>
+                    <small class="text-muted"><?= $msg['is_active'] ? '✅ Activo' : '❌ Inactivo' ?></small>
+                </div>
+            </div>
+        </div>
+        
+        <div class="modal fade" id="editModal<?= $msg['id'] ?>" tabindex="-1">
+            <div class="modal-dialog">
+                <div class="modal-content">
+                    <form method="POST">
+                        <input type="hidden" name="action" value="update">
+                        <input type="hidden" name="id" value="<?= $msg['id'] ?>">
+                        <div class="modal-header">
+                            <h5 class="modal-title">Editar Mensaje</h5>
+                            <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                        </div>
+                        <div class="modal-body">
+                            <div class="mb-3">
+                                <label class="form-label">Mensaje de bienvenida</label>
+                                <textarea name="welcome_message" class="form-control" rows="3"><?= htmlspecialchars($msg['welcome_message'] ?? '') ?></textarea>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">Texto del botón</label>
+                                <input type="text" name="button_text" class="form-control" value="<?= htmlspecialchars($msg['button_text'] ?? '') ?>">
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">Enlace de invitación</label>
+                                <input type="text" name="group_invite_link" class="form-control" value="<?= htmlspecialchars($msg['group_invite_link'] ?? '') ?>">
+                            </div>
+                            <div class="row mb-3">
+                                <div class="col-4">
+                                    <label class="form-label">Código idioma</label>
+                                    <input type="text" name="language_code" class="form-control" value="<?= htmlspecialchars($msg['language_code'] ?? 'es') ?>">
+                                </div>
+                                <div class="col-4">
+                                    <label class="form-label">Nombre idioma</label>
+                                    <input type="text" name="language_name" class="form-control" value="<?= htmlspecialchars($msg['language_name'] ?? 'Español') ?>">
+                                </div>
+                                <div class="col-4">
+                                    <label class="form-label">Flag</label>
+                                    <input type="text" name="flag_emoji" class="form-control" value="<?= htmlspecialchars($msg['flag_emoji'] ?? '🇪🇸') ?>">
+                                </div>
+                            </div>
+                            <div class="form-check">
+                                <input class="form-check-input" type="checkbox" name="is_active" id="editActive<?= $msg['id'] ?>" <?= $msg['is_active'] ? 'checked' : '' ?>>
+                                <label class="form-check-label" for="editActive<?= $msg['id'] ?>">Activo</label>
+                            </div>
+                        </div>
+                        <div class="modal-footer">
+                            <button type="submit" class="btn btn-primary">Guardar</button>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+        <?php endforeach; ?>
+    <?php endif; ?>
+</div>
+
+<div class="modal fade" id="welcomeModal" tabindex="-1">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <form method="POST">
+                <input type="hidden" name="action" value="add">
+                <div class="modal-header">
+                    <h5 class="modal-title">Nuevo Mensaje de Bienvenida</h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                </div>
+                <div class="modal-body">
+                    <div class="mb-3">
+                        <label class="form-label">Chat ID del grupo</label>
+                        <input type="text" name="chat_id" class="form-control" required>
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Mensaje de bienvenida</label>
+                        <textarea name="welcome_message" class="form-control" rows="3" required></textarea>
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Texto del botón</label>
+                        <input type="text" name="button_text" class="form-control">
+                    </div>
+                    <div class="mb-3">
+                        <label class="form-label">Enlace de invitación</label>
+                        <input type="text" name="group_invite_link" class="form-control">
+                    </div>
+                    <div class="row mb-3">
+                        <div class="col-4">
+                            <label class="form-label">Código idioma</label>
+                            <input type="text" name="language_code" class="form-control" value="es">
+                        </div>
+                        <div class="col-4">
+                            <label class="form-label">Nombre idioma</label>
+                            <input type="text" name="language_name" class="form-control" value="Español">
+                        </div>
+                        <div class="col-4">
+                            <label class="form-label">Flag</label>
+                            <input type="text" name="flag_emoji" class="form-control" value="🇪🇸">
+                        </div>
+                    </div>
+                    <div class="form-check">
+                        <input class="form-check-input" type="checkbox" name="is_active" id="newActive" checked>
+                        <label class="form-check-label" for="newActive">Activo</label>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="submit" class="btn btn-primary">Agregar</button>
+                </div>
+            </form>
+        </div>
+    </div>
+</div>
+
+<?php require_once __DIR__ . '/../../templates/footer.php'; ?>

telegram/converters/HtmlToTelegramHtmlConverter.php

@@ -0,0 +1,112 @@
+<?php
+
+namespace Telegram\Converters;
+
+class HtmlToTelegramHtmlConverter
+{
+    public function convert(string $html): string
+    {
+        $content = $html;
+
+        $content = $this->convertBold($content);
+        $content = $this->convertItalic($content);
+        $content = $this->convertUnderline($content);
+        $content = $this->convertStrikethrough($content);
+        $content = $this->convertCode($content);
+        $content = $this->convertLinks($content);
+        $content = $this->convertHeaders($content);
+        $content = $this->convertLineBreaks($content);
+        $content = $this->cleanUp($content);
+
+        return trim($content);
+    }
+
+    private function convertBold(string $content): string
+    {
+        $content = preg_replace('/<strong[^>]*>(.*?)<\/strong>/is', '<b>$1</b>', $content);
+        $content = preg_replace('/<b[^>]*>(.*?)<\/b>/is', '<b>$1</b>', $content);
+        return $content;
+    }
+
+    private function convertItalic(string $content): string
+    {
+        $content = preg_replace('/<em[^>]*>(.*?)<\/em>/is', '<i>$1</i>', $content);
+        $content = preg_replace('/<i[^>]*>(.*?)<\/i>/is', '<i>$1</i>', $content);
+        return $content;
+    }
+
+    private function convertUnderline(string $content): string
+    {
+        $content = preg_replace('/<u[^>]*>(.*?)<\/u>/is', '<u>$1</u>', $content);
+        return $content;
+    }
+
+    private function convertStrikethrough(string $content): string
+    {
+        $content = preg_replace('/<s[^>]*>(.*?)<\/s>/is', '<s>$1</s>', $content);
+        $content = preg_replace('/<strike[^>]*>(.*?)<\/strike>/is', '<s>$1</s>', $content);
+        $content = preg_replace('/<del[^>]*>(.*?)<\/del>/is', '<s>$1</s>', $content);
+        return $content;
+    }
+
+    private function convertCode(string $content): string
+    {
+        $content = preg_replace('/<code[^>]*>(.*?)<\/code>/is', '<code>$1</code>', $content);
+        $content = preg_replace('/<pre[^>]*>(.*?)<\/pre>/is', "<pre>\n$1\n</pre>", $content);
+        return $content;
+    }
+
+    private function convertLinks(string $content): string
+    {
+        $content = preg_replace('/<a[^>]+href=["\']([^"\']+)["\'][^>]*>(.*?)<\/a>/is', '<a href="$1">$2</a>', $content);
+        return $content;
+    }
+
+    private function convertHeaders(string $content): string
+    {
+        $content = preg_replace('/<h1[^>]*>(.*?)<\/h1>/is', "<b>$1</b>\n", $content);
+        $content = preg_replace('/<h2[^>]*>(.*?)<\/h2>/is', "<b>$1</b>\n", $content);
+        $content = preg_replace('/<h3[^>]*>(.*?)<\/h3>/is', "<b>$1</b>\n", $content);
+        $content = preg_replace('/<h4[^>]*>(.*?)<\/h4>/is', "<b>$1</b>\n", $content);
+        $content = preg_replace('/<h5[^>]*>(.*?)<\/h5>/is', "<b>$1</b>\n", $content);
+        $content = preg_replace('/<h6[^>]*>(.*?)<\/h6>/is', "<b>$1</b>\n", $content);
+        return $content;
+    }
+
+    private function convertLineBreaks(string $content): string
+    {
+        $content = preg_replace('/<br\s*\/?>/i', "\n", $content);
+        return $content;
+    }
+
+    private function cleanUp(string $content): string
+    {
+        $content = preg_replace('/<p[^>]*>(.*?)<\/p>/is', "$1\n", $content);
+        $content = preg_replace('/<div[^>]*>(.*?)<\/div>/is', "$1\n", $content);
+        $content = preg_replace('/<span[^>]*>(.*?)<\/span>/is', '$1', $content);
+        $content = preg_replace('/<li[^>]*>(.*?)<\/li>/is', "• $1\n", $content);
+        
+        $content = strip_tags($content, '<b><i><u><s><code><pre><a>');
+        
+        $content = preg_replace('/&nbsp;/', ' ', $content);
+        $content = preg_replace('/&amp;/', '&', $content);
+        $content = preg_replace('/&lt;/', '<', $content);
+        $content = preg_replace('/&gt;/', '>', $content);
+        $content = preg_replace('/&quot;/', '"', $content);
+        
+        $content = preg_replace('/\n{3,}/', "\n\n", $content);
+        
+        return $content;
+    }
+
+    public function extractImages(string $html): array
+    {
+        preg_match_all('/<img[^>]+src=["\']([^"\']+)["\'][^>]*>/i', $html, $matches);
+        return $matches[1] ?? [];
+    }
+
+    public function removeImages(string $html): string
+    {
+        return preg_replace('/<img[^>]+>/i', '', $html);
+    }
+}

telegram/webhook/telegram_bot_webhook.php

@@ -0,0 +1,405 @@
+<?php
+
+require_once __DIR__ . '/../../includes/db.php';
+require_once __DIR__ . '/../../includes/env_loader.php';
+require_once __DIR__ . '/../TelegramSender.php';
+require_once __DIR__ . '/../actions/TelegramActions.php';
+require_once __DIR__ . '/../converters/HtmlToTelegramHtmlConverter.php';
+require_once __DIR__ . '/../../src/Translate.php';
+
+$botToken = $_ENV['TELEGRAM_BOT_TOKEN'] ?? getenv('TELEGRAM_BOT_TOKEN');
+$webhookSecret = $_ENV['TELEGRAM_WEBHOOK_TOKEN'] ?? getenv('TELEGRAM_WEBHOOK_TOKEN');
+$receivedToken = $_GET['auth_token'] ?? '';
+
+if ($webhookSecret !== $receivedToken) {
+    http_response_code(403);
+    exit('Unauthorized');
+}
+
+$update = json_decode(file_get_contents('php://input'), true);
+
+if (!$update) {
+    exit('No update');
+}
+
+try {
+    $pdo = getDbConnection();
+    $sender = new Telegram\TelegramSender();
+    $actions = new Telegram\Actions\TelegramActions();
+    $translator = new src\Translate();
+    
+    if (isset($update['message'])) {
+        $message = $update['message'];
+        $chatId = $message['chat']['id'];
+        $userId = $message['from']['id'] ?? null;
+        $text = $message['text'] ?? '';
+        $username = $message['from']['first_name'] ?? 'Usuario';
+        
+        registerTelegramUser($pdo, $message['from']);
+        
+        if (!isExistingTelegramUser($pdo, $userId)) {
+            sendWelcomeMessage($pdo, $sender, $chatId, $username);
+        }
+        
+        if (str_starts_with($text, '/')) {
+            handleTelegramCommand($sender, $pdo, $chatId, $userId, $text, $username);
+        } elseif (str_starts_with($text, '#')) {
+            $command = ltrim($text, '#');
+            sendTemplateByCommand($pdo, $sender, $chatId, $command);
+        } else {
+            handleTelegramMessage($pdo, $sender, $chatId, $userId, $text);
+        }
+        
+    } elseif (isset($update['callback_query'])) {
+        $callbackQuery = $update['callback_query'];
+        $callbackData = $callbackQuery['data'];
+        $chatId = $callbackQuery['message']['chat']['id'];
+        $messageId = $callbackQuery['message']['message_id'];
+        
+        handleTelegramCallback($pdo, $sender, $translator, $chatId, $messageId, $callbackQuery['id'], $callbackData);
+    }
+    
+} catch (Exception $e) {
+    error_log("Telegram Webhook Error: " . $e->getMessage());
+}
+
+function registerTelegramUser(PDO $pdo, array $user): void
+{
+    $stmt = $pdo->prepare("
+        INSERT INTO recipients (platform_id, name, type, platform, language_code, chat_mode)
+        VALUES (?, ?, 'user', 'telegram', ?, 'bot')
+        ON DUPLICATE KEY UPDATE name = VALUES(name)
+    ");
+    
+    $name = trim(($user['first_name'] ?? '') . ' ' . ($user['last_name'] ?? ''));
+    $languageCode = $user['language_code'] ?? 'es';
+    
+    $stmt->execute([$user['id'], $name, $languageCode]);
+}
+
+function handleAutoTranslation(PDO $pdo, Telegram\TelegramSender $sender, src\Translate $translator, int $chatId, string $text): void
+{
+    $keyboard = getTelegramTranslationButtons($pdo, $text);
+    
+    if (!empty($keyboard)) {
+        $message = "🌐 <b>Traducciones disponibles:</b>\nHaz clic en una bandera para ver la traducción";
+        $sender->sendMessage($chatId, $message, $keyboard);
+    }
+}
+
+function getTelegramTranslationButtons(PDO $pdo, string $text, ?string $excludeLang = null): ?array
+{
+    try {
+        $stmt = $pdo->query("SELECT language_code, flag_emoji FROM supported_languages WHERE is_active = 1");
+        $activeLanguages = $stmt->fetchAll();
+        
+        if (count($activeLanguages) <= 1) {
+            return null;
+        }
+        
+        $textHash = md5($text);
+        $stmt = $pdo->prepare("INSERT INTO translation_cache (text_hash, original_text) VALUES (?, ?) ON DUPLICATE KEY UPDATE original_text = VALUES(original_text)");
+        $stmt->execute([$textHash, $text]);
+        
+        $buttons = [];
+        foreach ($activeLanguages as $lang) {
+            if ($excludeLang && $lang['language_code'] === $excludeLang) {
+                continue;
+            }
+            
+            $callbackData = "translate:" . $lang['language_code'] . ":" . $textHash;
+            
+            $buttons[] = [
+                'text' => $lang['flag_emoji'] . ' ' . strtoupper($lang['language_code']),
+                'callback_data' => $callbackData
+            ];
+        }
+        
+        if (empty($buttons)) {
+            return null;
+        }
+        
+        return ['inline_keyboard' => array_chunk($buttons, 3)];
+    } catch (Exception $e) {
+        error_log("getTelegramTranslationButtons error: " . $e->getMessage());
+        return null;
+    }
+}
+
+function handleTelegramCommand(Telegram\TelegramSender $sender, PDO $pdo, int $chatId, int $userId, string $command, string $username): void
+{
+    $command = str_replace(['/', '@botname'], '', $command);
+    $parts = explode(' ', $command);
+    $cmd = strtolower($parts[0]);
+    $args = array_slice($parts, 1);
+    
+    switch ($cmd) {
+        case 'start':
+            $stmt = $pdo->query("SELECT * FROM telegram_bot_messages WHERE id = 1");
+            $config = $stmt->fetch();
+            
+            if ($config && $config['is_active']) {
+                $text = str_replace('{user_name}', $username, $config['message_text']);
+                $buttons = [];
+                
+                if ($config['button_text'] && $config['group_invite_link']) {
+                    $buttons[] = [
+                        'text' => $config['button_text'],
+                        'url' => $config['group_invite_link']
+                    ];
+                }
+                
+                $keyboard = !empty($buttons) ? $sender->createInlineKeyboard($buttons) : null;
+                $sender->sendMessage($chatId, $text, $keyboard);
+            } else {
+                $sender->sendMessage($chatId, "¡Hola {$username}! 👋\n\nUsa /comandos para ver los comandos disponibles.");
+            }
+            break;
+            
+        case 'comandos':
+            $message = "📋 <b>Comandos disponibles:</b>\n\n";
+            $message .= "/start - Iniciar bot\n";
+            $message .= "/comandos - Ver comandos\n";
+            $message .= "/setlang [código] - Establecer idioma\n";
+            $message .= "/bienvenida - Mensaje de bienvenida\n";
+            $message .= "/agente - Cambiar modo de chat\n";
+            $message .= "#comando - Enviar plantilla\n";
+            $message .= "Escribe cualquier texto para traducir automáticamente";
+            
+            $sender->sendMessage($chatId, $message);
+            break;
+            
+        case 'setlang':
+            $langCode = $args[0] ?? 'es';
+            $stmt = $pdo->prepare("UPDATE recipients SET language_code = ? WHERE platform_id = ? AND platform = 'telegram'");
+            $stmt->execute([$langCode, $chatId]);
+            
+            $sender->sendMessage($chatId, "✅ Idioma actualizado a: " . strtoupper($langCode));
+            break;
+            
+        case 'bienvenida':
+            $stmt = $pdo->query("SELECT * FROM telegram_bot_messages WHERE id = 1");
+            $config = $stmt->fetch();
+            
+            if ($config && $config['is_active']) {
+                $text = str_replace('{user_name}', $username, $config['message_text']);
+                
+                // Agregar botones de traducción (convertir HTML a texto plano)
+                $plainText = html_entity_decode(strip_tags($text), ENT_QUOTES | ENT_HTML5, 'UTF-8');
+                $plainText = preg_replace('/\s+/', ' ', $plainText);
+                $translationButtons = getTelegramTranslationButtons($pdo, $plainText);
+                
+                if (!empty($translationButtons)) {
+                    $keyboard = $sender->createInlineKeyboard(array_map(function($btn) {
+                        return ['text' => $btn['flag'], 'callback_data' => $btn['callback_data']];
+                    }, $translationButtons));
+                    $sender->sendMessage($chatId, $text, $keyboard);
+                } else {
+                    $sender->sendMessage($chatId, $text);
+                }
+            }
+            break;
+            
+        case 'agente':
+            $buttons = [
+                [
+                    'text' => '🤖 Seguir con Bot',
+                    'callback_data' => 'chat_mode:bot:' . $userId
+                ],
+                [
+                    'text' => '💬 Platicar con IA',
+                    'callback_data' => 'chat_mode:ia:' . $userId
+                ]
+            ];
+            
+            $keyboard = $sender->createInlineKeyboard($buttons);
+            $sender->sendMessage($chatId, "🤖 <b>Selecciona un modo de chat:</b>", $keyboard);
+            break;
+    }
+}
+
+function handleTelegramMessage(PDO $pdo, Telegram\TelegramSender $sender, int $chatId, int $userId, string $text): void
+{
+    $stmt = $pdo->prepare("SELECT chat_mode FROM recipients WHERE platform_id = ? AND platform = 'telegram'");
+    $stmt->execute([$userId]);
+    $recipient = $stmt->fetch();
+    
+    if ($recipient && $recipient['chat_mode'] === 'ia') {
+        sendToN8NIA($sender, $chatId, $userId, $text);
+    } else {
+        require_once __DIR__ . '/../../src/Translate.php';
+        $translator = new src\Translate();
+        handleAutoTranslation($pdo, $sender, $translator, $chatId, $text);
+    }
+}
+
+function sendToN8NIA(Telegram\TelegramSender $sender, int $chatId, int $userId, string $userMessage): void
+{
+    $useN8n = $_ENV['N8N_IA_WEBHOOK_URL'] ?? getenv('N8N_IA_WEBHOOK_URL') ?? '';
+    $useN8n = trim($useN8n, '"');
+    
+    if (!empty($useN8n)) {
+        $data = [
+            'user_id' => (string)$userId,
+            'message' => $userMessage
+        ];
+        
+        $ch = curl_init($useN8n);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($ch, CURLOPT_POST, true);
+        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
+        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
+        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
+        
+        $response = curl_exec($ch);
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        $error = curl_error($ch);
+        curl_close($ch);
+        
+        if ($httpCode < 200 || $httpCode >= 300) {
+            $sender->sendMessage($chatId, "❌ Error HTTP: $httpCode");
+            error_log("N8N IA Telegram Error: HTTP $httpCode - $error");
+        }
+        return;
+    }
+    
+    require_once __DIR__ . '/../../src/IA/Agent.php';
+    $agent = new \IA\Agent();
+    
+    try {
+        $response = $agent->generateResponse($userMessage);
+        $sender->sendMessage($chatId, $response);
+    } catch (\Exception $e) {
+        $sender->sendMessage($chatId, "❌ Error: " . $e->getMessage());
+        error_log("IA Agent Error: " . $e->getMessage());
+    }
+}
+
+function sendTemplateByCommand(PDO $pdo, Telegram\TelegramSender $sender, int $chatId, string $command): void
+{
+    $stmt = $pdo->prepare("SELECT * FROM recurrent_messages WHERE telegram_command = ?");
+    $stmt->execute([$command]);
+    $template = $stmt->fetch();
+    
+    if ($template) {
+        $converter = new Telegram\Converters\HtmlToTelegramHtmlConverter();
+        $content = $converter->convert($template['message_content']);
+        
+        $plainText = $template['message_content'];
+        $plainText = preg_replace('/<br\s*\/?>/i', "\n", $plainText);
+        $plainText = preg_replace('/<\/p>/i', "\n", $plainText);
+        $plainText = preg_replace('/<p[^>]*>/i', '', $plainText);
+        $plainText = strip_tags($plainText);
+        $plainText = html_entity_decode($plainText, ENT_QUOTES | ENT_HTML5, 'UTF-8');
+        $plainText = trim($plainText);
+        
+        $translationButtons = getTelegramTranslationButtons($pdo, $plainText);
+        
+        if ($translationButtons) {
+            $sender->sendMessage($chatId, $content, $translationButtons);
+        } else {
+            $sender->sendMessage($chatId, $content);
+        }
+    } else {
+        $sender->sendMessage($chatId, "❌ Plantilla no encontrada: #{$command}");
+    }
+}
+
+function handleTelegramCallback(PDO $pdo, Telegram\TelegramSender $sender, src\Translate $translator, int $chatId, int $messageId, string $callbackQueryId, string $callbackData): void
+{
+    $parts = explode(':', $callbackData, 3);
+    $action = $parts[0] ?? '';
+    
+    if ($action === 'translate') {
+        $targetLang = $parts[1] ?? 'es';
+        $textHash = $parts[2] ?? '';
+        
+        // Recuperar texto de la base de datos
+        $stmt = $pdo->prepare("SELECT original_text FROM translation_cache WHERE text_hash = ?");
+        $stmt->execute([$textHash]);
+        $row = $stmt->fetch();
+        
+        if (!$row) {
+            $sender->answerCallbackQuery($callbackQueryId, "❌ Error: Texto no encontrado");
+            return;
+        }
+        
+        $originalText = $row['original_text'];
+        
+        if (empty($originalText)) {
+            $sender->answerCallbackQuery($callbackQueryId, "❌ Error: No se pudo recuperar el texto");
+            return;
+        }
+        
+        try {
+            // Obtener el idioma original
+            $sourceLang = $translator->detectLanguage($originalText) ?? 'es';
+            
+            // Traducir
+            $translated = $translator->translate($originalText, $sourceLang, $targetLang);
+            
+            if ($translated) {
+                $sender->answerCallbackQuery($callbackQueryId, "", false);
+                
+                $keyboard = getTelegramTranslationButtons($pdo, $originalText, $targetLang);
+                
+                $sender->editMessageText($chatId, $messageId, "🌐 <b>Traducción (" . strtoupper($targetLang) . "):</b>\n\n" . $translated, $keyboard);
+            } else {
+                $sender->answerCallbackQuery($callbackQueryId, "❌ Error al traducir el mensaje", false);
+            }
+        } catch (Exception $e) {
+            error_log("Callback translation error: " . $e->getMessage());
+            $sender->answerCallbackQuery($callbackQueryId, "❌ Error en la traducción", false);
+        }
+    } elseif ($action === 'chat_mode') {
+        $mode = $parts[1] ?? 'bot';
+        $userId = $parts[2] ?? '';
+        
+        if (empty($userId)) {
+            $sender->answerCallbackQuery($callbackQueryId, "❌ Error: Usuario no identificado");
+            return;
+        }
+        
+        $chatMode = ($mode === 'ia') ? 'ia' : 'bot';
+        $stmt = $pdo->prepare("UPDATE recipients SET chat_mode = ? WHERE platform_id = ? AND platform = 'telegram'");
+        $stmt->execute([$chatMode, $userId]);
+        
+        if ($chatMode === 'ia') {
+            $sender->answerCallbackQuery($callbackQueryId, "✅ Modo IA activado. Ahora puedes platicar con la IA.", false);
+            $sender->sendMessage($chatId, "✅ <b>Modo IA activado.</b>\n\nAhora puedes platicar conmigo. Escribe cualquier cosa y la enviaré a la IA.");
+        } else {
+            $sender->answerCallbackQuery($callbackQueryId, "✅ Modo Bot activado.", false);
+            $sender->sendMessage($chatId, "✅ <b>Modo Bot activado.</b>\n\nAhora puedes usar comandos como #comando y traducción.");
+        }
+    }
+}
+
+function isExistingTelegramUser(PDO $pdo, int $userId): bool
+{
+    $stmt = $pdo->prepare("SELECT id FROM recipients WHERE platform_id = ? AND platform = 'telegram'");
+    $stmt->execute([$userId]);
+    return $stmt->fetch() !== false;
+}
+
+function sendWelcomeMessage(PDO $pdo, Telegram\TelegramSender $sender, int $chatId, string $username): void
+{
+    $stmt = $pdo->query("SELECT * FROM telegram_bot_messages WHERE id = 1");
+    $config = $stmt->fetch();
+    
+    if ($config && $config['is_active']) {
+        $text = str_replace('{user_name}', $username, $config['message_text']);
+        $buttons = [];
+        
+        if ($config['button_text'] && $config['group_invite_link']) {
+            $buttons[] = [
+                'text' => $config['button_text'],
+                'url' => $config['group_invite_link']
+            ];
+        }
+        
+        $keyboard = !empty($buttons) ? $sender->createInlineKeyboard($buttons) : null;
+        $sender->sendMessage($chatId, $text, $keyboard);
+    } else {
+        $sender->sendMessage($chatId, "¡Hola {$username}! 👋\n\nUsa /comandos para ver los comandos disponibles.");
+    }
+}