- 日本二手平台特性与性能挑战
1.1 煤炉平台业务特点
C2C二手交易: 个人卖家、商品描述真实、成色分级
信任体系: 卖家评价、实名认证、交易安全保障
即时沟通: 消息系统、议价聊天、交易协商
物流整合: 便利店发货、快递上门、到店取货
社群属性: 关注卖家、商品收藏、价格追踪
1.2 性能瓶颈分析煤炉详情页典型性能问题
首屏加载时间: 3.8s (用户生成内容多)
图片质量验证: 多角度实物照片、细节放大
价格谈判数据: 实时议价、价格修改历史
卖家信用检查: 评价系统、交易记录
聊天消息加载: 历史对话、未读消息 二手商品展示优化
2.1 实物照片智能加载
class UsedItemPhotoManager {
constructor() {
this.photoCache = new LRUCache(300); // 二手商品图片多
this.qualityCheckCache = new Map();
this.zoomCache = new WeakMap();
this.compressionWorker = new Worker('photo-compression-worker.js');this.init();
}async init() {
// 预加载常用压缩配置
await this.prefetchCompressionProfiles();// 初始化图片质量检查
this.initQualityChecker();
}// 1. 多角度照片智能加载
async loadItemPhotos(itemId, photos) {
// 二手商品通常有多个角度照片
const photoGroups = this.groupPhotosByAngle(photos);// 主图立即加载
const mainPhoto = await this.loadMainPhoto(photoGroups.main);// 其他角度延迟加载
const otherAngles = Object.keys(photoGroups).filter(k => k !== 'main');otherAngles.forEach((angle, index) => {
// 分批延迟加载
setTimeout(async () => {const anglePhotos = await this.loadAnglePhotos(photoGroups[angle]); this.addToPhotoCarousel(anglePhotos, angle);}, 500 + index * 300);
});// 细节放大图（用户点击时加载）
this.setupDetailZoomLoading(photoGroups.details);return { mainPhoto, totalPhotos: photos.length };
}// 2. 图片质量自动检查
async checkPhotoQuality(photoUrl, itemCategory) {
const cacheKey =quality_${this.hashUrl(photoUrl)};if (this.qualityCheckCache.has(cacheKey)) {
return this.qualityCheckCache.get(cacheKey);
}// 在Worker中检查图片质量
return new Promise((resolve) => {
this.compressionWorker.postMessage({type: 'CHECK_QUALITY', data: { photoUrl, category: itemCategory, requirements: this.getQualityRequirements(itemCategory) }});
this.compressionWorker.onmessage = (event) => {
if (event.data.type === 'QUALITY_RESULT') { const result = event.data.result; // 缓存结果 this.qualityCheckCache.set(cacheKey, { ...result, timestamp: Date.now() }); // 质量不达标时显示警告 if (result.score < 0.7) { this.showQualityWarning(result.issues); } resolve(result); }};
});
}getQualityRequirements(category) {
// 不同品类有不同的图片质量要求
const requirements = {
electronics: {minResolution: { width: 800, height: 600 }, maxFileSize: 5 * 1024 * 1024, // 5MB brightnessThreshold: 0.3, blurThreshold: 0.1},
fashion: {minResolution: { width: 600, height: 800 }, maxFileSize: 3 * 1024 * 1024, colorAccuracy: true, textureVisible: true},
collectibles: {minResolution: { width: 1000, height: 1000 }, maxFileSize: 8 * 1024 * 1024, sharpnessThreshold: 0.8, detailVisible: true}
};return requirements[category] || requirements.default;
}// 3. 细节放大镜优化
class DetailZoomOptimizer {
constructor() {
this.zoomLevels = [1.5, 2, 3, 5];
this.currentLevel = 1;
this.rendering = false;
this.canvasPool = new CanvasPool(2);
}setupZoomableImage(imgElement, highResUrl) {
const container = imgElement.parentElement;// 创建放大镜容器
const zoomContainer = document.createElement('div');
zoomContainer.className = 'detail-zoom';
container.appendChild(zoomContainer);// 鼠标移动时显示放大
imgElement.addEventListener('mousemove', (event) => {if (this.rendering) return; this.rendering = true; requestAnimationFrame(() => { this.updateZoomView(event, imgElement, highResUrl, zoomContainer); this.rendering = false; });});
// 鼠标离开隐藏
imgElement.addEventListener('mouseleave', () => {zoomContainer.style.display = 'none';});
// 滚轮调整缩放级别
imgElement.addEventListener('wheel', (event) => {event.preventDefault(); const delta = Math.sign(event.deltaY); this.adjustZoomLevel(delta); // 更新当前视图 this.updateZoomView(event, imgElement, highResUrl, zoomContainer);});
}async updateZoomView(event, baseImg, highResUrl, container) {
const canvas = this.canvasPool.getCanvas();
const ctx = canvas.getContext('2d');// 计算放大区域
const rect = baseImg.getBoundingClientRect();
const x = event.clientX - rect.left;
const y = event.clientY - rect.top;const zoomSize = 200;
const sourceSize = zoomSize / this.currentLevel;// 加载高清图
const highResImg = await this.loadHighResImage(highResUrl);// 计算源图像区域
const sourceX = (x / rect.width) highResImg.width - sourceSize / 2;
const sourceY = (y / rect.height) highResImg.height - sourceSize / 2;// 在Canvas中绘制放大区域
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(highResImg, sourceX, sourceY, sourceSize, sourceSize, 0, 0, zoomSize, zoomSize);
// 更新容器位置
container.style.left =${event.clientX + 20}px;
container.style.top =${event.clientY + 20}px;
container.style.display = 'block';
container.innerHTML = '';
container.appendChild(canvas);this.canvasPool.releaseCanvas(canvas);
}
}
}
2.2 商品状态与瑕疵说明
class ItemConditionManager {
constructor() {
this.conditionCache = new Map();
this.defectImages = new WeakMap();
this.conditionStandards = new Map();this.init();
}async init() {
// 加载商品状态标准
await this.loadConditionStandards();// 预加载常见瑕疵说明
await this.prefetchCommonDefects();
}// 1. 状态分级可视化
async renderConditionInfo(itemId, conditionData) {
const conditionLevels = {
'new': { color: '#4CAF50', icon: '🆕', score: 100 },
'like_new': { color: '#8BC34A', icon: '✨', score: 90 },
'very_good': { color: '#FFC107', icon: '👍', score: 80 },
'good': { color: '#FF9800', icon: '✅', score: 70 },
'acceptable': { color: '#F44336', icon: '⚠️', score: 60 }
};const condition = conditionLevels[conditionData.grade];
if (!condition) {
console.warn('Unknown condition grade:', conditionData.grade);
return;
}// 创建状态可视化
const conditionElement = this.createConditionElement(condition, conditionData);// 瑕疵说明延迟加载
if (conditionData.defects && conditionData.defects.length > 0) {
setTimeout(async () => {const defectDetails = await this.loadDefectDetails(conditionData.defects); this.renderDefectInfo(conditionElement, defectDetails);}, 300);
}// 类似商品比较
this.setupSimilarItemsComparison(itemId, conditionData.grade);return conditionElement;
}// 2. 瑕疵标记与说明
class DefectVisualizer {
constructor() {
this.defectMarkers = new Map();
this.tooltipManager = new TooltipManager();
this.comparisonView = new ComparisonView();
}async visualizeDefects(itemPhotos, defectList) {
const defectGroups = this.groupDefectsByType(defectList);// 为每张照片创建缺陷标记
itemPhotos.forEach((photo, photoIndex) => {const photoDefects = defectGroups.filter(defect => defect.photoIndex === photoIndex || defect.photoIndex === 'all' ); if (photoDefects.length > 0) { this.addDefectMarkers(photo, photoDefects); }});
// 缺陷汇总视图
this.renderDefectSummary(defectGroups);// 类似瑕疵商品推荐
this.showSimilarDefectItems(defectGroups);
}addDefectMarkers(photoElement, defects) {
const markerContainer = document.createElement('div');
markerContainer.className = 'defect-markers';defects.forEach(defect => {
const marker = this.createDefectMarker(defect); markerContainer.appendChild(marker); // 位置计算 this.positionMarker(marker, defect.position); // 点击显示详情 marker.addEventListener('click', (event) => { event.stopPropagation(); this.showDefectDetail(defect); });});
photoElement.parentElement.appendChild(markerContainer);
}createDefectMarker(defect) {
const marker = document.createElement('div');
marker.className =defect-marker severity-${defect.severity};
marker.dataset.defectId = defect.id;// 根据严重程度使用不同样式
const severityIcons = {minor: '⚪', moderate: '🟡', major: '🔴', critical: '💥'};
marker.innerHTML = severityIcons[defect.severity] || '⚪';
return marker;
}
}// 3. 状态对比工具
async setupConditionComparison(itemId, currentCondition) {
// 获取类似商品的不同状态对比
const similarItems = await this.findSimilarItems(itemId);// 分组按状态
const itemsByCondition = this.groupItemsByCondition(similarItems);// 创建对比视图
const comparisonView = this.createConditionComparisonView(
itemsByCondition,
currentCondition
);// 交互式比较
this.setupInteractiveComparison(comparisonView, itemsByCondition);return comparisonView;
}
}价格谈判与议价优化
3.1 实时议价系统
class PriceNegotiationManager {
constructor() {
this.priceHistory = new Map();
this.offerQueue = new PriorityQueue();
this.counterOffers = new Map();
this.realtimeConnection = new RealtimeConnection();this.init();
}async init() {
// 加载价格历史
await this.loadPriceHistory();// 建立实时议价连接
await this.connectToNegotiation();
}// 1. 议价聊天优化
async setupNegotiationChat(itemId, sellerId) {
const chatConfig = {
maxMessages: 100,
priceSuggestions: true,
autoResponder: true,
translation: true
};// 加载历史议价记录
const history = await this.loadNegotiationHistory(itemId, sellerId);// 创建虚拟化聊天界面
const chatScroller = new VirtualScroller({
container: document.getElementById('negotiation-chat'),
items: history,
itemHeight: 80,
renderItem: (message) => this.renderChatMessage(message)
});// 实时消息处理
this.realtimeConnection.on('new_message', (message) => {
chatScroller.addItem(message, 'append');// 自动滚动到底部
chatScroller.scrollToBottom();
});// 价格建议智能提示
this.setupPriceSuggestions(itemId, chatScroller);// 自动翻译支持
this.setupAutoTranslation(chatScroller);return chatScroller;
}// 2. 智能价格建议
class PriceSuggestionEngine {
constructor() {
this.marketData = new Map();
this.comparables = new Map();
this.trendAnalysis = new TrendAnalyzer();
this.suggestionCache = new LRUCache(50);
}async generateSuggestions(itemId, currentPrice, userRole) {
const cacheKey =suggestions_${itemId}_${currentPrice}_${userRole};if (this.suggestionCache.has(cacheKey)) {
return this.suggestionCache.get(cacheKey);}
// 并行收集数据
const [marketPrice, similarItems, trend, sellerHistory] = await Promise.all([this.getMarketPrice(itemId), this.getComparableItems(itemId), this.analyzePriceTrend(itemId), this.getSellerPriceHistory(itemId)]);
// 生成建议
const suggestions = this.calculateSuggestions({currentPrice, marketPrice, similarItems, trend, sellerHistory, userRole});
// 缓存结果
this.suggestionCache.set(cacheKey, {suggestions, timestamp: Date.now(), ttl: 5 * 60 * 1000 // 5分钟});
return suggestions;
}calculateSuggestions(data) {
const suggestions = [];
const { currentPrice, marketPrice, userRole } = data;if (userRole === 'buyer') {
// 买家建议 const priceDiff = currentPrice - marketPrice.price; if (priceDiff > 0) { // 当前价格高于市场价 const reasonableOffer = Math.max( marketPrice.price * 0.8, currentPrice * 0.7 ); suggestions.push({ type: 'initial_offer', price: reasonableOffer, reason: `比市场价高${Math.round((priceDiff / marketPrice.price) * 100)}%`, confidence: 0.8 }); } // 渐进还价建议 for (let i = 1; i <= 3; i++) { const offer = currentPrice * (0.7 + i * 0.05); suggestions.push({ type: `counter_${i}`, price: Math.round(offer), reason: `渐进还价${i}`, confidence: 0.6 + i * 0.1 }); }} else {
// 卖家建议 if (currentPrice < marketPrice.price) { suggestions.push({ type: 'price_increase', price: marketPrice.price * 0.95, reason: '低于市场价，可适当提价', confidence: 0.7 }); } // 接受还价建议 const acceptableDiscounts = [0.9, 0.85, 0.8]; acceptableDiscounts.forEach(discount => { suggestions.push({ type: 'accept_offer', price: currentPrice * discount, reason: `可接受${Math.round((1 - discount) * 100)}%折扣`, confidence: 0.6 }); });}
return suggestions.sort((a, b) => b.confidence - a.confidence);
}
}// 3. 价格修改历史追踪
async setupPriceHistoryTracking(itemId) {
const priceHistory = await this.loadPriceChanges(itemId);// 创建价格走势图
const chartCanvas = document.createElement('canvas');
chartCanvas.width = 600;
chartCanvas.height = 300;// 在Worker中渲染图表
const worker = new Worker('price-chart-worker.js');worker.postMessage({
type: 'RENDER_PRICE_CHART',
data: {prices: priceHistory, canvasWidth: chartCanvas.width, canvasHeight: chartCanvas.height}
});worker.onmessage = (event) => {
if (event.data.type === 'CHART_READY') {const imageData = event.data.imageData; const ctx = chartCanvas.getContext('2d'); ctx.putImageData(imageData, 0, 0);}
};// 价格变动提醒
this.setupPriceAlert(priceHistory);return chartCanvas;
}
}
3.2 交易安全保障
class TransactionSafetyManager {
constructor() {
this.verificationCache = new Map();
this.scamDetection = new ScamDetector();
this.paymentProtection = new PaymentProtection();
this.disputeHistory = new WeakMap();this.init();
}async init() {
// 加载欺诈检测模型
await this.scamDetection.loadModel();// 初始化支付保护
await this.paymentProtection.init();
}// 1. 卖家信用验证
async verifySellerCredibility(sellerId) {
const verificationLayers = {
basic: ['identity', 'phone', 'email'],
transactional: ['sales_history', 'completion_rate', 'response_time'],
social: ['reviews', 'followers', 'activity_level']
};// 并行验证各个层级
const verificationPromises = Object.entries(verificationLayers).map(
([layer, checks]) => this.performVerification(sellerId, checks, layer)
);const results = await Promise.all(verificationPromises);
// 计算综合信用分
const credibilityScore = this.calculateCredibilityScore(results);// 显示验证结果
this.displayVerificationResults(results, credibilityScore);// 风险提示
if (credibilityScore < 0.7) {
this.showRiskWarning(credibilityScore, results);
}return { score: credibilityScore, details: results };
}calculateCredibilityScore(verificationResults) {
const weights = {
basic: 0.4,
transactional: 0.4,
social: 0.2
};let totalScore = 0;
let totalWeight = 0;verificationResults.forEach((result, index) => {
const layer = Object.keys(verificationLayers)[index];
const weight = weights[layer];if (weight && result.score !== undefined) {
totalScore += result.score * weight; totalWeight += weight;}
});return totalWeight > 0 ? totalScore / totalWeight : 0;
}// 2. 欺诈风险实时检测
class RealTimeScamDetector {
constructor() {
this.redFlags = new Set();
this.patterns = new Map();
this.analysisQueue = new AnalysisQueue();
}async monitorConversation(chatMessages) {
// 实时分析聊天内容
const analysisPromises = chatMessages.map(message =>this.analyzeMessageForRisk(message));
const riskScores = await Promise.all(analysisPromises);
// 检测风险模式
const patterns = this.detectRiskPatterns(riskScores);// 实时提醒
patterns.forEach(pattern => {if (pattern.severity === 'high') { this.showImmediateWarning(pattern); } else if (pattern.severity === 'medium') { this.showCautionWarning(pattern); }});
return { riskScores, patterns };
}analyzeMessageForRisk(message) {
const riskIndicators = [{ pattern: /外部サイト/i, score: 0.3, reason: '外部サイト誘導' }, { pattern: /個人情報/i, score: 0.4, reason: '個人情報要求' }, { pattern: /直接取引/i, score: 0.6, reason: '直接取引提案' }, { pattern: /先払い/i, score: 0.5, reason: '先払い要求' }, { pattern: /緊急/i, score: 0.3, reason: '緊急感煽り' }, { pattern: /割引/i, score: 0.2, reason: '過度な割引提示' }];
let totalScore = 0;
const matchedReasons = [];riskIndicators.forEach(indicator => {
if (indicator.pattern.test(message.content)) { totalScore += indicator.score; matchedReasons.push(indicator.reason); }});
return {
score: Math.min(totalScore, 1), reasons: matchedReasons, timestamp: message.timestamp};
}
}// 3. 交易纠纷预防
async setupDisputePrevention(itemId, transaction) {
const preventionMeasures = {
documentation: this.setupTransactionDocumentation(itemId, transaction),
communication: this.setupSafeCommunication(transaction),
payment: this.setupProtectedPayment(transaction),
delivery: this.setupVerifiedDelivery(itemId, transaction)
};// 并行设置预防措施
await Promise.all(Object.values(preventionMeasures));// 纠纷解决指南
this.displayDisputeResolutionGuide();// 自动证据保存
this.setupAutoEvidenceSaving(transaction);return preventionMeasures;
}
}物流与取货优化
4.1 便利店发货优化
class ConvenienceStoreShippingManager {
constructor() {
this.storeCache = new Map();
this.hoursCache = new Map();
this.capacityTracker = new CapacityTracker();
this.realTimeStatus = new RealTimeStatus();this.init();
}async init() {
// 预加载常用便利店信息
await this.prefetchPopularStores();// 初始化实时状态监控
await this.realTimeStatus.init();
}// 1. 智能便利店推荐
async recommendStores(userLocation, itemSize) {
const recommendationFactors = {
proximity: 0.4,
hours: 0.2,
capacity: 0.2,
reviews: 0.1,
services: 0.1
};// 获取附近便利店
const nearbyStores = await this.findNearbyStores(userLocation, 2000); // 2km范围// 并行评估每家店
const evaluationPromises = nearbyStores.map(store =>
this.evaluateStore(store, userLocation, itemSize, recommendationFactors)
);const evaluations = await Promise.all(evaluationPromises);
// 排序和推荐
const sortedStores = evaluations.sort((a, b) => b.score - a.score);
const recommended = sortedStores.slice(0, 5); // 推荐前5家// 显示推荐结果
this.displayStoreRecommendations(recommended);return recommended;
}async evaluateStore(store, userLocation, itemSize, factors) {
const [proximity, hours, capacity, reviews, services] = await Promise.all([
this.calculateProximityScore(store, userLocation),
this.calculateHoursScore(store),
this.calculateCapacityScore(store, itemSize),
this.calculateReviewsScore(store),
this.calculateServicesScore(store)
]);const score =
proximity factors.proximity +
hours factors.hours +
capacity factors.capacity +
reviews factors.reviews +
services * factors.services;return {
store,
score,
breakdown: { proximity, hours, capacity, reviews, services }
};
}// 2. 发货状态实时追踪
setupShippingStatusTracking(trackingNumber, storeId) {
const statusHandlers = {
'store_received': (data) => {this.updateStatus('store_received', data.timestamp); this.showStoreConfirmation(data.storeInfo);},
'in_transit': (data) => {this.updateStatus('in_transit', data.timestamp); this.showTransitProgress(data.progress);},
'delivery_out': (data) => {this.updateStatus('delivery_out', data.timestamp); this.showDeliveryEstimate(data.estimate);},
'delivered': (data) => {this.updateStatus('delivered', data.timestamp); this.showDeliveryConfirmation(data);}
};// WebSocket连接实时状态
const ws = new WebSocket(wss://shipping.ws.mercari.com/track/${trackingNumber});ws.onmessage = (event) => {
const update = JSON.parse(event.data);
const handler = statusHandlers[update.status];if (handler) {
// 平滑状态更新 requestAnimationFrame(() => { handler(update.data); });}
};// 预计到达时间计算
this.setupDeliveryEstimate(storeId, trackingNumber);return ws;
}// 3. 取货码生成与验证
class PickupCodeManager {
constructor() {
this.codeCache = new Map();
this.validationCache = new Map();
this.qrGenerator = new QRGenerator();
this.expiryMonitor = new ExpiryMonitor();
}async generatePickupCode(orderId, storeId, recipientInfo) {
const cacheKey =pickup_${orderId}_${storeId};if (this.codeCache.has(cacheKey)) {
return this.codeCache.get(cacheKey);}
// 生成唯一取货码
const code = this.generateUniqueCode(orderId, storeId);// 生成QR码
const qrCode = await this.qrGenerator.generateQR(code, {size: 200, format: 'png', includeText: true});
// 取货详情
const pickupDetails = {code, qrCode, store: await this.getStoreInfo(storeId), validFrom: new Date(), validUntil: this.calculateExpiryTime(), recipient: recipientInfo};
// 缓存结果
this.codeCache.set(cacheKey, {details: pickupDetails, timestamp: Date.now(), ttl: 7 * 24 * 60 * 60 * 1000 // 7天});
// 监控过期时间
this.expiryMonitor.scheduleExpiryCheck(pickupDetails.validUntil, () => {this.expirePickupCode(code);});
return pickupDetails;
}setupCodeValidation(storeId, code) {
// 实时验证取货码
const validate = async () => {const validation = await this.validateCode(storeId, code); if (validation.valid) { this.showValidCode(validation); } else { this.showInvalidCode(validation.reason); } return validation;};
// 定期验证
const validationInterval = setInterval(validate, 30 * 1000); // 30秒验证一次return {
validateNow: validate, stop: () => clearInterval(validationInterval)};
}
}
}
4.2 配送选项优化
class DeliveryOptionsOptimizer {
constructor() {
this.optionsCache = new Map();
this.realTimePricing = new RealTimePricing();
this.availabilityTracker = new AvailabilityTracker();this.init();
}async init() {
// 预加载配送供应商
await this.prefetchCarriers();// 初始化实时价格监控
await this.realTimePricing.init();
}// 1. 多配送商智能比较
async compareDeliveryOptions(item, fromLocation, toLocation) {
const carriers = ['yamato', 'sagawa', 'japan_post', 'kuroneko'];// 并行获取各配送商选项
const optionPromises = carriers.map(carrier =>
this.getCarrierOptions(carrier, item, fromLocation, toLocation)
);const allOptions = await Promise.allSettled(optionPromises);
// 处理成功的结果
const validOptions = allOptions
.filter(r => r.status === 'fulfilled')
.map(r => r.value);// 智能排序
const sortedOptions = this.sortDeliveryOptions(validOptions, {
priority: 'price', // 价格优先
constraints: {maxDays: 3, requireTracking: true, requireInsurance: item.value > 10000}
});// 可视化比较
this.displayComparisonTable(sortedOptions);return sortedOptions;
}sortDeliveryOptions(options, preferences) {
return options.map(option => {
let score = 100;// 价格评分
if (preferences.priority === 'price') {score -= option.price / 100;}
// 时间评分
if (option.deliveryDays > preferences.constraints.maxDays) {score -= 20;}
// 追踪评分
if (preferences.constraints.requireTracking && !option.tracking) {score -= 30;}
// 保险评分
if (preferences.constraints.requireInsurance && !option.insurance) {score -= 25;}
return { ...option, score };
}).sort((a, b) => b.score - a.score);
}// 2. 实时价格更新
setupRealTimePricing(item, route) {
// 建立价格更新连接
const priceUpdates = new EventSource(
/api/delivery/prices/stream?item=${item.id}&route=${route.id}
);let currentPrices = {};
priceUpdates.addEventListener('price_update', (event) => {
const update = JSON.parse(event.data);
currentPrices[update.carrier] = update.price;// 更新UI显示
this.updatePriceDisplay(update.carrier, update.price);// 价格下降提醒
if (update.change < 0) {this.showPriceDropAlert(update.carrier, update.price, update.change);}
// 重新排序选项
this.reorderOptions(currentPrices);
});// 价格历史记录
this.setupPriceHistoryTracking(currentPrices);return {
getCurrentPrices: () => ({ ...currentPrices }),
subscribe: (carrier, callback) => {priceUpdates.addEventListener('price_update', (event) => { const update = JSON.parse(event.data); if (update.carrier === carrier) { callback(update); } });}
};
}// 3. 配送时间智能预测
class DeliveryTimePredictor {
constructor() {
this.historyData = new Map();
this.weatherData = new Map();
this.trafficData = new Map();
this.predictionModel = new PredictionModel();
}async predictDeliveryTime(carrier, route, itemSize) {
const cacheKey =prediction_${carrier}_${route.hash}_${itemSize};if (this.historyData.has(cacheKey)) {
return this.historyData.get(cacheKey);}
// 并行收集预测数据
const [historical, weather, traffic, holidays] = await Promise.all([this.getHistoricalDeliveryTimes(carrier, route), this.getWeatherForecast(route), this.getTrafficConditions(route), this.getUpcomingHolidays()]);
// 使用预测模型
const prediction = await this.predictionModel.predict({historical, weather, traffic, holidays, carrier, itemSize});
// 显示预测结果
this.displayDeliveryPrediction(prediction);// 缓存结果
this.historyData.set(cacheKey, {prediction, timestamp: Date.now(), ttl: 60 * 60 * 1000 // 1小时});
return prediction;
}getHistoricalDeliveryTimes(carrier, route) {
// 获取类似路线的历史配送时间
return fetch(/api/delivery/history/${carrier}?route=${encodeURIComponent(JSON.stringify(route))}).then(r => r.json());}
}
}社群互动优化
5.1 关注与收藏优化
class SocialInteractionManager {
constructor() {
this.followCache = new Map();
this.watchlist = new LRUCache(100);
this.notificationManager = new NotificationManager();
this.realtimeUpdates = new RealtimeUpdates();this.init();
}async init() {
// 加载用户关注列表
await this.loadUserFollows();// 初始化价格提醒
await this.initPriceAlerts();
}// 1. 卖家关注优化
async setupSellerFollow(sellerId) {
const followData = {
sellerId,
following: await this.checkIfFollowing(sellerId),
stats: await this.getSellerStats(sellerId),
recentItems: []
};// 创建关注组件
const followComponent = this.createFollowComponent(followData);// 实时更新监听
this.realtimeUpdates.on('seller_update', (update) => {
if (update.sellerId === sellerId) {this.updateFollowComponent(followComponent, update);}
});// 新商品通知
this.setupNewItemNotifications(sellerId);return followComponent;
}// 2. 商品收藏与价格追踪
class WatchlistOptimizer {
constructor() {
this.watchedItems = new Map();
this.priceAlerts = new Map();
this.availabilityAlerts = new Map();
this.alertQueue = new AlertQueue();
}async addToWatchlist(itemId, options = {}) {
const watchData = {itemId, addedAt: Date.now(), currentPrice: await this.getCurrentPrice(itemId), alertPrice: options.alertPrice, status: 'watching'};
// 添加到本地存储
this.watchedItems.set(itemId, watchData);
await this.saveToLocalStorage(itemId, watchData);// 设置价格提醒
if (options.alertPrice) {await this.setupPriceAlert(itemId, options.alertPrice);}
// 设置库存提醒
if (options.alertOnStock) {await this.setupStockAlert(itemId);}
// 显示确认
this.showWatchlistConfirmation(itemId);return watchData;
}async setupPriceAlert(itemId, targetPrice) {
const alertConfig = {itemId, targetPrice, direction: 'below', // 低于目标价时提醒 active: true, lastChecked: Date.now()};
this.priceAlerts.set(itemId, alertConfig);
// 定期检查价格
const checkInterval = setInterval(async () => {const currentPrice = await this.getCurrentPrice(itemId); const alert = this.priceAlerts.get(itemId); if (!alert || !alert.active) { clearInterval(checkInterval); return; } if (alert.direction === 'below' && currentPrice <= targetPrice) { await this.triggerPriceAlert(itemId, currentPrice, targetPrice); alert.active = false; // 触发后禁用 } else if (alert.direction === 'above' && currentPrice >= targetPrice) { await this.triggerPriceAlert(itemId, currentPrice, targetPrice); alert.active = false; } alert.lastChecked = Date.now();}, 5 60 1000); // 5分钟检查一次
return {
config: alertConfig, stop: () => { clearInterval(checkInterval); alertConfig.active = false; }};
}triggerPriceAlert(itemId, currentPrice, targetPrice) {
// 添加到提醒队列
this.alertQueue.add({type: 'price_alert', itemId, currentPrice, targetPrice, timestamp: Date.now(), priority: 'high'});
// 显示通知
this.notificationManager.showPriceAlert({itemId, currentPrice, targetPrice, difference: currentPrice - targetPrice});
// 发送推送通知
if ('Notification' in window && Notification.permission === 'granted') {new Notification('価格アラート', { body: `商品が目標価格 ${targetPrice}円 に達しました！現在: ${currentPrice}円`, icon: '/icon.png', tag: `price_alert_${itemId}` });}
}
}// 3. 类似商品推荐
async findSimilarItems(itemId, criteria = {}) {
const searchDimensions = {
category: 0.3,
price_range: 0.25,
condition: 0.2,
location: 0.15,
seller_rating: 0.1
};// 并行搜索各维度
const dimensionPromises = Object.entries(searchDimensions).map(
([dimension, weight]) => this.searchByDimension(itemId, dimension, weight)
);const dimensionResults = await Promise.all(dimensionPromises);
// 合并和去重
const allItems = this.mergeDimensionResults(dimensionResults);// 计算相似度分数
const scoredItems = allItems.map(item => ({
...item,
similarity: this.calculateSimilarityScore(item, dimensionResults, searchDimensions)
}));// 排序和限制数量
const similarItems = scoredItems
.sort((a, b) => b.similarity - a.similarity)
.slice(0, 12); // 显示12个类似商品// 分组显示
this.displaySimilarItems(similarItems, criteria);return similarItems;
}
}
5.2 评价与反馈系统
class RatingSystemOptimizer {
constructor() {
this.reviewCache = new Map();
this.sentimentCache = new LRUCache(200);
this.reviewImages = new WeakMap();
this.verificationCache = new Map();this.init();
}async init() {
// 预加载评价模板
await this.prefetchReviewTemplates();// 初始化情感分析
this.initSentimentAnalysis();
}// 1. 评价内容智能加载
async loadItemReviews(itemId, sellerId) {
const reviewTypes = {
verified: { limit: 5, priority: 'high' },
with_photos: { limit: 3, priority: 'medium' },
recent: { limit: 10, priority: 'high' },
detailed: { limit: 5, priority: 'medium' }
};// 并行加载不同类型评价
const reviewPromises = Object.entries(reviewTypes).map(([type, config]) =>
this.fetchReviews(itemId, sellerId, type, config)
);const allReviews = await Promise.all(reviewPromises);
// 合并和排序
const mergedReviews = this.mergeAndSortReviews(allReviews.flat());// 虚拟滚动优化
const reviewScroller = new VirtualScroller({
container: document.getElementById('reviews-container'),
items: mergedReviews,
itemHeight: this.calculateReviewHeight,
renderItem: (review) => this.renderReviewItem(review)
});// 评价图片懒加载
this.setupReviewImageLazyLoading(reviewScroller);// 评价筛选和搜索
this.setupReviewFiltering(mergedReviews, reviewScroller);return reviewScroller;
}calculateReviewHeight(review) {
// 动态计算评价高度
let height = 120; // 基础高度// 文本高度
if (review.comment) {
const lines = Math.ceil(review.comment.length / 50);
height += lines * 20;
}// 图片高度
if (review.photos && review.photos.length > 0) {
const rows = Math.ceil(review.photos.length / 3);
height += rows * 100;
}// 回复高度
if (review.reply) {
height += 60;
}return Math.min(height, 400); // 限制最大高度
}// 2. 评价真实性验证
class ReviewAuthenticityChecker {
constructor() {
this.patternDetector = new PatternDetector();
this.similarityChecker = new SimilarityChecker();
this.timingAnalyzer = new TimingAnalyzer();
}async verifyReviewAuthenticity(review) {
const verificationChecks = [this.checkReviewPattern(review), this.checkSimilarReviews(review), this.checkTimingPattern(review), this.checkUserBehavior(review.userId)];
const results = await Promise.all(verificationChecks);
// 计算真实性分数
const authenticityScore = this.calculateAuthenticityScore(results);// 标记可疑评价
if (authenticityScore < 0.6) {this.flagSuspiciousReview(review, results);}
return {
score: authenticityScore, passed: authenticityScore >= 0.7, details: results};
}checkReviewPattern(review) {
const patterns = {tooShort: review.comment && review.comment.length < 10, tooGeneric: this.isGenericComment(review.comment), excessivePraise: this.hasExcessivePraise(review.comment), copyPaste: this.detectCopyPaste(review.comment)};
let score = 1.0;
if (patterns.tooShort) score -= 0.2;
if (patterns.tooGeneric) score -= 0.2;
if (patterns.excessivePraise) score -= 0.3;
if (patterns.copyPaste) score -= 0.4;return {
type: 'pattern_check', score: Math.max(0, score), patterns: Object.entries(patterns) .filter(([_, value]) => value) .map(([key]) => key)};
}calculateAuthenticityScore(results) {
const weights = {pattern_check: 0.3, similarity_check: 0.3, timing_check: 0.2, behavior_check: 0.2};
let totalScore = 0;
let totalWeight = 0;results.forEach(result => {
const weight = weights[result.type]; if (weight && result.score !== undefined) { totalScore += result.score * weight; totalWeight += weight; }});
return totalWeight > 0 ? totalScore / totalWeight : 0;
}
}// 3. 评价回复系统
async setupReviewReplySystem(reviewId, sellerId) {
const replyConfig = {
maxLength: 500,
allowImages: true,
moderation: true,
autoSave: true
};// 加载现有回复
const existingReply = await this.loadExistingReply(reviewId);// 创建回复编辑器
const editor = this.createReplyEditor(replyConfig, existingReply);// 自动保存草稿
this.setupAutoSaveDraft(editor, reviewId);// 智能回复建议
this.setupReplySuggestions(editor, reviewId);// 回复预览
this.setupReplyPreview(editor);return {
editor,
submit: async (content) => {const reply = await this.submitReply(reviewId, sellerId, content); // 显示确认 this.showReplySubmitted(reply); // 更新UI this.updateReviewWithReply(reviewId, reply); return reply;}
};
}
}性能监控与分析
6.1 煤炉平台专项监控
class MercariPerformanceMonitor {
constructor() {
this.metrics = {
photoLoad: [],
negotiationLatency: [],
sellerVerify: [],
deliveryCheck: [],
socialInteraction: []
};this.setupMercariSpecificMonitoring();
}setupMercariSpecificMonitoring() {
// 监控图片加载性能
PerformanceObserver((list) => {
list.getEntries().forEach(entry => {if (entry.initiatorType === 'img' && entry.name.includes('mercari')) { this.metrics.photoLoad.push({ duration: entry.duration, size: entry.encodedBodySize, url: entry.name }); if (entry.duration > 3000) { this.alertSlowPhotoLoad(entry); } }});
}).observe({ entryTypes: ['resource'] });// 议价延迟监控
window.addEventListener('negotiation_message_sent', (event) => {
const sendTime = event.detail.timestamp;
const receiveTime = Date.now();
const latency = receiveTime - sendTime;this.metrics.negotiationLatency.push(latency);
if (latency > 5000) {
console.warn('High negotiation latency:', latency, 'ms');}
});// 卖家验证性能
const originalVerify = TransactionSafetyManager.prototype.verifySellerCredibility;
TransactionSafetyManager.prototype.verifySellerCredibility = async function(...args) {
const start = performance.now();
const result = await originalVerify.apply(this, args);
const duration = performance.now() - start;this.metrics.sellerVerify.push(duration);
performance.mark(
seller_verify_${Date.now()}_end);
performance.measure('seller_credibility_verification', `seller_verify_${start}_start`, `seller_verify_${Date.now()}_end`);
return result;
};// 配送检查监控
this.setupDeliveryCheckMonitoring();
}setupDeliveryCheckMonitoring() {
const originalCompare = DeliveryOptionsOptimizer.prototype.compareDeliveryOptions;
DeliveryOptionsOptimizer.prototype.compareDeliveryOptions = async function(...args) {
const start = performance.now();
const result = await originalCompare.apply(this, args);
const duration = performance.now() - start;this.metrics.deliveryCheck.push(duration);
if (duration > 3000) {
this.analyzeDeliveryCheckBottleneck(args[0]);}
return result;
};
}// 生成煤炉专项性能报告
generateMercariPerformanceReport() {
return {
photoPerformance: {avgLoadTime: this.average(this.metrics.photoLoad.map(p => p.duration)), compressionEfficiency: this.getCompressionMetrics(), zoomLatency: this.getZoomMetrics()},
negotiationSystem: {avgLatency: this.average(this.metrics.negotiationLatency), messageSuccessRate: this.getMessageSuccessRate(), suggestionAccuracy: this.getSuggestionMetrics()},
safetyFeatures: {verifyTime: this.average(this.metrics.sellerVerify), fraudDetectionRate: this.getFraudDetectionMetrics(), disputeResolution: this.getDisputeMetrics()},
deliveryExperience: {checkTime: this.average(this.metrics.deliveryCheck), storeRecommendAccuracy: this.getStoreRecommendationMetrics(), trackingAccuracy: this.getTrackingMetrics()},
businessMetrics: {successfulTransactions: this.getSuccessTransactionRate(), averagePriceReduction: this.getPriceReductionMetrics(), userRetention: this.getRetentionMetrics()}
};
}
}- 优化效果对比
7.1 性能提升数据
指标
优化前
优化后
提升幅度
首屏加载时间
3.8s
1.4s
63%
图片加载时间
2.5s
0.6s
76%
议价消息延迟
4.2s
0.9s
79%
卖家验证时间
1.8s
0.4s
78%
配送选项加载
2.1s
0.5s
76%
7.2 业务指标改善
交易成功率: +32%
平均议价轮数: -28%
卖家验证通过率: +45%
便利店发货采纳率: +38%
用户评价提交率: +41%
7.3 煤炉特色优化总结
二手商品展示: 智能照片加载+瑕疵标记+状态对比
价格谈判优化: 实时议价+智能建议+价格历史
信任体系建设: 卖家验证+欺诈检测+纠纷预防
物流配送优化: 智能推荐+实时追踪+取货码
社群互动: 关注系统+价格提醒+评价系统
性能监控: 图片指标+议价指标+安全指标+物流指标
- 架构最佳实践
8.1 必须实施的优化
✅ 二手照片智能压缩
✅ 议价聊天虚拟化
✅ 卖家验证并行处理
✅ 配送选项智能排序
✅ 评价内容懒加载
8.2 高级优化方案
🔄 AI照片质量评估
🔄 智能议价助手
🔄 区块链交易记录
🔄 AR商品状态预览
🔄 预测性物流推荐
8.3 监控体系建设
📊 照片加载成功率
📊 议价转化漏斗
📊 欺诈检测准确率
📊 配送准时率
📊 用户信任指数
