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/**
* Telegram Notification Service
* Handles sending trading signals to Telegram with error handling
*/
export class TelegramService {
constructor() {
this.botToken = null;
this.chatId = null;
this.enabled = false;
this.errorCount = 0;
this.maxErrors = 3;
}
/**
* Initializes Telegram service from settings
*/
async init() {
try {
const settings = await this.loadSettings();
this.botToken = settings.telegram?.botToken || null;
this.chatId = settings.telegram?.chatId || null;
this.enabled = settings.notifications?.telegramEnabled || false;
if (this.botToken && this.chatId) {
console.log('[TelegramService] Initialized');
} else {
console.log('[TelegramService] Not configured');
}
} catch (error) {
console.warn('[TelegramService] Init error (non-critical):', error);
this.enabled = false;
}
}
/**
* Loads settings from localStorage or API
*/
async loadSettings() {
try {
const stored = localStorage.getItem('app_settings');
if (stored) {
return JSON.parse(stored);
}
const response = await fetch('/api/settings');
if (response.ok) {
return await response.json();
}
} catch (error) {
console.warn('[TelegramService] Could not load settings:', error);
}
return {};
}
/**
* Sends trading signal to Telegram
* @param {Object} signalData - Signal data to send
* @returns {Promise<boolean>} Success status
*/
async sendSignal(signalData) {
if (!this.enabled || !this.botToken || !this.chatId) {
return false;
}
try {
const message = this.formatSignalMessage(signalData);
const response = await fetch(`https://api.telegram.org/bot${this.botToken}/sendMessage`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
chat_id: this.chatId,
text: message,
parse_mode: 'Markdown',
disable_web_page_preview: true,
}),
signal: AbortSignal.timeout(10000),
});
const data = await response.json();
if (data.ok) {
this.errorCount = 0;
console.log('[TelegramService] Signal sent successfully');
return true;
} else {
throw new Error(data.description || 'Telegram API error');
}
} catch (error) {
this.errorCount++;
console.error('[TelegramService] Send error:', error.message);
if (this.errorCount >= this.maxErrors) {
console.warn('[TelegramService] Too many errors, disabling temporarily');
this.enabled = false;
}
return false;
}
}
/**
* Formats signal data into Telegram message
*/
formatSignalMessage(signalData) {
const { symbol, signal, strategy, confidence, price, takeProfitLevels, stopLoss, levels, riskReward } = signalData;
const signalEmoji = signal === 'buy' ? '🟢' : signal === 'sell' ? '🔴' : '🟡';
const signalText = signal.toUpperCase();
let message = `${signalEmoji} *${symbol} Trading Signal*\n\n`;
message += `📊 *Strategy:* ${strategy}\n`;
message += `🎯 *Signal:* ${signalText}\n`;
message += `💪 *Confidence:* ${confidence}%\n`;
message += `💰 *Price:* $${price.toLocaleString()}\n\n`;
if (takeProfitLevels && takeProfitLevels.length > 0) {
message += `*Take Profit Levels:*\n`;
takeProfitLevels.forEach((tp, idx) => {
const profit = ((tp.level / price - 1) * 100).toFixed(2);
message += ` ${tp.type}: $${tp.level.toLocaleString()} (+${profit}%)\n`;
});
message += `\n`;
}
if (stopLoss) {
const risk = Math.abs(((stopLoss / price - 1) * 100)).toFixed(2);
message += `🛑 *Stop Loss:* $${stopLoss.toLocaleString()} (-${risk}%)\n`;
}
if (riskReward) {
message += `⚖️ *Risk/Reward:* ${riskReward.riskRewardRatio}\n`;
}
if (levels) {
if (levels.resistance && levels.resistance.length > 0) {
message += `\n*Resistance Levels:*\n`;
levels.resistance.slice(0, 2).forEach(r => {
message += ` $${r.level.toLocaleString()} (${r.strength})\n`;
});
}
if (levels.support && levels.support.length > 0) {
message += `\n*Support Levels:*\n`;
levels.support.slice(0, 2).forEach(s => {
message += ` $${s.level.toLocaleString()} (${s.strength})\n`;
});
}
}
message += `\n_Time: ${new Date().toLocaleString()}_`;
return message;
}
/**
* Tests Telegram connection
*/
async testConnection(botToken, chatId) {
try {
const response = await fetch(`https://api.telegram.org/bot${botToken}/sendMessage`, {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
chat_id: chatId,
text: '🧪 *Test Message*\n\nTelegram integration is working correctly!',
parse_mode: 'Markdown',
}),
signal: AbortSignal.timeout(10000),
});
const data = await response.json();
return data.ok;
} catch (error) {
console.error('[TelegramService] Test error:', error);
return false;
}
}
/**
* Updates Telegram configuration
*/
updateConfig(botToken, chatId, enabled) {
this.botToken = botToken;
this.chatId = chatId;
this.enabled = enabled && botToken && chatId;
this.errorCount = 0;
}
/**
* Checks if Telegram is properly configured
*/
isConfigured() {
return !!(this.botToken && this.chatId);
}
/**
* Gets service status
*/
getStatus() {
return {
enabled: this.enabled,
configured: this.isConfigured(),
errorCount: this.errorCount,
};
}
}
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