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* FeedbackMiddleware - 用户反馈收集机制
*
* v2.4.0 新增：
* - 任务完成后收集用户评分（1-5星）和文字反馈
* - 简单的反馈存储和统计接口
* - 反馈趋势分析和常见问题识别
*
* @module middleware/feedback-middleware
*/
const fs = require('fs');
const path = require('path');
// ─── 默认配置 ────────────────────────────────────────────
const DEFAULT_CONFIG = {
storagePath: path.join(__dirname, '../../.feedback'),
maxFeedbackPerTask: 10, // 每个任务最大反馈数
maxTotalFeedback: 1000, // 总反馈上限（防止无限增长）
ratingScale: { min: 1, max: 5 },
onFeedbackReceived: null, // 回调
};
// ─── 反馈数据模型 ─────────────────────────────────────────
/**
* @typedef {Object} Feedback
* @property {string} id - 唯一 ID
* @property {string} taskId - 关联任务 ID
* @property {string} skillName - 被评价的技能
* @property {number} rating - 评分 (1-5)
* @property {string} comment - 文字反馈
* @property {string[]} tags - 反馈标签
* @property {string} timestamp - ISO 时间戳
* @property {string} category - 分类: praise|issue|suggestion|bug
*/
// ─── FeedbackMiddleware 类 ───────────────────────────────
class FeedbackMiddleware {
constructor(config = {}) {
this.config = { ...DEFAULT_CONFIG, ...config };
this.feedbacks = [];
this._initStorage();
}
// ── 初始化 ──────────────────────────────────────────────
_initStorage() {
const dir = this.config.storagePath;
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir, { recursive: true });
}
const file = path.join(dir, 'feedbacks.json');
if (fs.existsSync(file)) {
try {
this.feedbacks = JSON.parse(fs.readFileSync(file, 'utf-8'));
} catch (e) {
this.feedbacks = [];
}
}
}
save() {
const file = path.join(this.config.storagePath, 'feedbacks.json');
fs.writeFileSync(file, JSON.stringify(this.feedbacks, null, 2));
}
// ── 中间件接口：execute ─────────────────────────────────
/**
* Middleware 标准接口
* 在任务完成后附加反馈收集接口
*/
async execute(context, next) {
const result = await next(context);
// 标记任务已完成，准备收集反馈
context._feedbackReady = true;
context._feedbackSkill = context.skillName || 'unknown';
context._feedbackTaskId = context.taskId || 'unknown';
return result;
}
// ── 核心：提交反馈 ──────────────────────────────────────
/**
* 提交用户反馈
* @param {Object} params
* @param {string} params.taskId - 任务 ID
* @param {string} [params.skillName] - 技能名称
* @param {number} params.rating - 评分 (1-5)
* @param {string} [params.comment] - 文字反馈
* @param {string[]} [params.tags] - 标签
* @param {string} [params.category] - 分类
* @returns {Object} 创建的反馈记录
*/
submit({ taskId, skillName = 'unknown', rating, comment = '', tags = [], category }) {
// 验证评分
const { min, max } = this.config.ratingScale;
if (typeof rating !== 'number' || rating < min || rating > max) {
throw new Error(`Rating must be between ${min} and ${max}, got ${rating}`);
}
// 检查任务反馈数量上限
const taskCount = this.feedbacks.filter(f => f.taskId === taskId).length;
if (taskCount >= this.config.maxFeedbackPerTask) {
throw new Error(`Task ${taskId} has reached max feedback limit (${this.config.maxFeedbackPerTask})`);
}
// 自动分类（如果未指定）
if (!category) {
category = this._autoCategorize(rating, comment);
}
const feedback = {
id: `fb_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`,
taskId,
skillName,
rating,
comment: comment.slice(0, 2000), // 限制长度
tags,
category,
timestamp: new Date().toISOString(),
};
this.feedbacks.push(feedback);
// 清理超出上限的旧反馈
if (this.feedbacks.length > this.config.maxTotalFeedback) {
this.feedbacks = this.feedbacks.slice(-this.config.maxTotalFeedback);
}
this.save();
// 触发回调
if (this.config.onFeedbackReceived) {
this.config.onFeedbackReceived(feedback);
}
return feedback;
}
// ── 内部：自动分类 ──────────────────────────────────────
_autoCategorize(rating, comment) {
const lower = comment.toLowerCase();
// 优先检查明确的 bug 关键词（不管评分）
if (lower.includes('bug') || lower.includes('错误') || lower.includes('error') || lower.includes('崩溃') || lower.includes('fail')) {
return 'bug';
}
if (lower.includes('建议') || lower.includes('希望') || lower.includes('改进') || lower.includes('suggestion') || lower.includes('improve')) {
return 'suggestion';
}
// 按评分分类
if (rating >= 4) return 'praise';
return 'issue';
}
// ── 查询接口 ────────────────────────────────────────────
/**
* 获取任务的反馈统计
* @param {string} taskId - 任务 ID（可选，不传则返回总体）
* @returns {Object} 统计数据
*/
getStats(taskId) {
const filtered = taskId
? this.feedbacks.filter(f => f.taskId === taskId)
: this.feedbacks;
if (filtered.length === 0) {
return {
total: 0,
avgRating: 0,
ratingDistribution: {},
categoryBreakdown: {},
topTags: [],
recentComments: [],
};
}
// 评分分布
const ratingDistribution = {};
for (let i = 1; i <= 5; i++) ratingDistribution[i] = 0;
filtered.forEach(f => { ratingDistribution[f.rating]++; });
// 分类统计
const categoryBreakdown = {};
filtered.forEach(f => {
categoryBreakdown[f.category] = (categoryBreakdown[f.category] || 0) + 1;
});
// 标签统计
const tagCounts = {};
filtered.forEach(f => {
f.tags.forEach(t => { tagCounts[t] = (tagCounts[t] || 0) + 1; });
});
const topTags = Object.entries(tagCounts)
.sort((a, b) => b[1] - a[1])
.slice(0, 10)
.map(([tag, count]) => ({ tag, count }));
// 最近评论
const recentComments = [...filtered]
.filter(f => f.comment)
.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp))
.slice(0, 5)
.map(f => ({
rating: f.rating,
comment: f.comment,
category: f.category,
timestamp: f.timestamp,
}));
const totalRating = filtered.reduce((sum, f) => sum + f.rating, 0);
return {
total: filtered.length,
avgRating: Math.round((totalRating / filtered.length) * 100) / 100,
ratingDistribution,
categoryBreakdown,
topTags,
recentComments,
latestUpdate: filtered[filtered.length - 1]?.timestamp,
};
}
/**
* 获取技能维度的评分排名
* @returns {Array} 按平均评分排序的技能列表
*/
getSkillRankings() {
const skillMap = {};
this.feedbacks.forEach(f => {
if (!skillMap[f.skillName]) {
skillMap[f.skillName] = { total: 0, sum: 0 };
}
skillMap[f.skillName].total++;
skillMap[f.skillName].sum += f.rating;
});
return Object.entries(skillMap)
.map(([name, data]) => ({
skillName: name,
avgRating: Math.round((data.sum / data.total) * 100) / 100,
totalFeedbacks: data.total,
}))
.sort((a, b) => b.avgRating - a.avgRating);
}
/**
* 搜索反馈
* @param {Object} filters - 过滤条件
* @returns {Array} 匹配的反馈
*/
search(filters = {}) {
return this.feedbacks.filter(f => {
Iif (filters.taskId && f.taskId !== filters.taskId) return false;
if (filters.skillName && f.skillName !== filters.skillName) return false;
if (filters.category && f.category !== filters.category) return false;
if (filters.minRating && f.rating < filters.minRating) return false;
Iif (filters.maxRating && f.rating > filters.maxRating) return false;
if (filters.tags && !filters.tags.every(t => f.tags.includes(t))) return false;
Iif (filters.since && new Date(f.timestamp) < new Date(filters.since)) return false;
return true;
});
}
/**
* 获取反馈趋势（按时间聚合）
* @param {string} granularity - 'hourly' | 'daily' | 'weekly'
* @returns {Array} 趋势数据
*/
getTrend(granularity = 'daily') {
const grouped = {};
this.feedbacks.forEach(f => {
const date = new Date(f.timestamp);
let key;
Iif (granularity === 'hourly') {
key = date.toISOString().slice(0, 13); // YYYY-MM-DDTHH
} else Iif (granularity === 'weekly') {
const weekStart = new Date(date);
weekStart.setDate(date.getDate() - date.getDay());
key = weekStart.toISOString().slice(0, 10);
} else {
key = date.toISOString().slice(0, 10); // YYYY-MM-DD
}
if (!grouped[key]) {
grouped[key] = { count: 0, totalRating: 0, issues: 0 };
}
grouped[key].count++;
grouped[key].totalRating += f.rating;
if (f.category === 'issue' || f.category === 'bug') {
grouped[key].issues++;
}
});
return Object.entries(grouped)
.map(([period, data]) => ({
period,
count: data.count,
avgRating: Math.round((data.totalRating / data.count) * 100) / 100,
issueRate: Math.round((data.issues / data.count) * 1000) / 10,
}))
.sort((a, b) => a.period.localeCompare(b.period));
}
/**
* 重置所有反馈数据（测试用）
*/
reset() {
this.feedbacks = [];
this.save();
}
}
module.exports = { FeedbackMiddleware, DEFAULT_CONFIG: DEFAULT_CONFIG };
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