// ==UserScript== // @name Buff.163 Price Drop Monitor // @namespace web.nextbyte.ai // @version 1.2 // @description Monitor favorited CS:GO skin prices on Buff.163 and get notifications when prices drop by a specified percentage // @author NextByte // @match https://buff.163.com/user-center/bookmark/goods?game=csgo* // @grant GM_notification // @grant GM_getValue // @grant GM_setValue // @run-at document-idle // ==/UserScript== (function() { 'use strict'; // Configuration const CONFIG = { checkInterval: 60000, // Check every 60 seconds (1 minute) priceDropThreshold: GM_getValue('priceDropThreshold', 5), // Default 5% price drop enableNotifications: GM_getValue('enableNotifications', true), storageKey: 'buff163_price_history', lastCheckKey: 'buff163_last_check' }; // Request notification permission if (Notification.permission === 'default') { Notification.requestPermission(); } // Add settings UI function createSettingsUI() { const settingsHTML = `

🔔 Price Monitor

Price Drop Threshold (%):

Enable Notifications

Status: Monitoring...

Items tracked: 0

`; const settingsDiv = document.createElement('div'); settingsDiv.innerHTML = settingsHTML; document.body.appendChild(settingsDiv); // Toggle settings panel const toggleBtn = document.getElementById('toggle-settings'); const contentDiv = document.getElementById('settings-content'); let isCollapsed = false; toggleBtn.addEventListener('click', () => { isCollapsed = !isCollapsed; contentDiv.style.display = isCollapsed ? 'none' : 'block'; toggleBtn.textContent = isCollapsed ? '▲' : '▼'; }); // Save settings document.getElementById('save-settings').addEventListener('click', () => { const threshold = parseFloat(document.getElementById('drop-threshold').value); const notificationsEnabled = document.getElementById('enable-notifications').checked; GM_setValue('priceDropThreshold', threshold); GM_setValue('enableNotifications', notificationsEnabled); CONFIG.priceDropThreshold = threshold; CONFIG.enableNotifications = notificationsEnabled; showStatus('Settings saved!', '#4CAF50'); }); // Clear history document.getElementById('clear-history').addEventListener('click', () => { if (confirm('Are you sure you want to clear all price history? This will reset all price tracking.')) { GM_setValue(CONFIG.storageKey, JSON.stringify({})); GM_setValue(CONFIG.lastCheckKey, Date.now()); showStatus('History cleared!', '#f44336'); } }); } // Show status message function showStatus(message, color = '#4CAF50') { const statusDiv = document.getElementById('monitor-status'); if (statusDiv) { statusDiv.textContent = message; statusDiv.style.background = color === '#f44336' ? '#ffebee' : '#e8f5e9'; statusDiv.style.color = color === '#f44336' ? '#c62828' : '#2e7d32'; setTimeout(() => { statusDiv.textContent = 'Status: Monitoring...'; statusDiv.style.background = '#e8f5e9'; statusDiv.style.color = '#2e7d32'; }, 3000); } } // Parse price from Chinese Yuan format function parsePrice(priceText) { // Extract number from format like "¥ 580" or "¥580" const match = priceText.trim().match(/¥\s*(\d+(?:\.\d+)?)/); return match ? parseFloat(match[1]) : null; } // Get all items from current page function getItemsFromPage() { const items = []; const rows = document.querySelectorAll('table.list_tb tbody tr:not(:first-child)'); rows.forEach(row => { const nameElement = row.querySelector('td.name-cont h3 a'); const priceElements = row.querySelectorAll('td.t_Left strong.f_Strong'); if (nameElement && priceElements.length >= 1) { const itemName = nameElement.textContent.trim(); const itemUrl = nameElement.href; const itemId = itemUrl.match(/\/goods\/(\d+)/)?.[1]; // First price is "Lowest Sell Price" (Самая низкая цена продажи) const currentPrice = parsePrice(priceElements[0].textContent); if (itemId && currentPrice !== null) { items.push({ id: itemId, name: itemName, price: currentPrice, url: itemUrl, timestamp: Date.now() }); } } }); return items; } // Load price history from storage function loadPriceHistory() { try { const data = GM_getValue(CONFIG.storageKey, '{}'); return JSON.parse(data); } catch (e) { console.error('Error loading price history:', e); return {}; } } // Save price history to storage function savePriceHistory(history) { try { GM_setValue(CONFIG.storageKey, JSON.stringify(history)); } catch (e) { console.error('Error saving price history:', e); } } // Send notification function sendNotification(item, oldPrice, newPrice, percentDrop) { if (!CONFIG.enableNotifications) return; const title = `💰 Price Drop: ${percentDrop.toFixed(1)}%`; const message = `${item.name}\nOld: ¥${oldPrice} → New: ¥${newPrice}`; // Try GM_notification first (Tampermonkey) if (typeof GM_notification !== 'undefined') { GM_notification({ title: title, text: message, timeout: 10000, onclick: () => { window.open(item.url, '_blank'); } }); } // Fallback to browser notification else if (Notification.permission === 'granted') { const notification = new Notification(title, { body: message, icon: 'https://buff.163.com/favicon.ico', requireInteraction: false }); notification.onclick = () => { window.open(item.url, '_blank'); notification.close(); }; setTimeout(() => notification.close(), 10000); } } // Check for price drops function checkPriceDrops() { const currentItems = getItemsFromPage(); const history = loadPriceHistory(); let dropsDetected = 0; currentItems.forEach(item => { const oldData = history[item.id]; if (oldData) { const priceDiff = oldData.price - item.price; const percentDrop = (priceDiff / oldData.price) * 100; // Check if price dropped by threshold percentage if (percentDrop >= CONFIG.priceDropThreshold) { console.log(`Price drop detected for ${item.name}: ${percentDrop.toFixed(2)}%`); sendNotification(item, oldData.price, item.price, percentDrop); dropsDetected++; } } // Update history with current price history[item.id] = { price: item.price, name: item.name, url: item.url, timestamp: item.timestamp }; }); savePriceHistory(history); GM_setValue(CONFIG.lastCheckKey, Date.now()); // Update UI const itemsTrackedDiv = document.getElementById('items-tracked'); if (itemsTrackedDiv) { const totalTracked = Object.keys(history).length; itemsTrackedDiv.textContent = `Items tracked: ${currentItems.length} on page / ${totalTracked} total`; } if (dropsDetected > 0) { showStatus(`${dropsDetected} price drop(s) detected!`, '#FF9800'); } } // Auto-refresh functionality function setupAutoRefresh() { setInterval(() => { console.log('Checking prices...'); checkPriceDrops(); }, CONFIG.checkInterval); } // Check if we're on a pagination page function checkPaginationPages() { const paginationLinks = document.querySelectorAll('.simple-pagination a.page-link'); if (paginationLinks.length > 0) { console.log(`Found ${paginationLinks.length} pagination pages. Consider checking all pages manually.`); } } // Initialize function init() { console.log('Buff.163 Price Monitor initialized'); // Create settings UI createSettingsUI(); // Initial check setTimeout(() => { checkPriceDrops(); }, 1000); // Setup auto-refresh setupAutoRefresh(); // Check pagination checkPaginationPages(); // Add visual indicator console.log(`Monitoring ${getItemsFromPage().length} items for price drops >= ${CONFIG.priceDropThreshold}%`); } // Wait for page to load if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init); } else { init(); } })();