GitNexus-backend/apis/Repos/GitContributors.js

const API = require("../../lib/API")
const AccessControl = require("../../lib/AccessControl")
const { BaseStdResponse } = require("../../BaseStdResponse")
const db = require("../../plugin/DataBase/db")
const simpleGit = require('simple-git')
const crypto = require("crypto")

class GitContributors extends API {
    constructor() {
        super()

        this.setMethod("GET")
        this.setPath("/Repos/Contributors")
    }

    getGravatarUrl(email) {
        if (!email) return null
        const hash = crypto.createHash("md5").update(email.trim().toLowerCase()).digest("hex")
        return `https://gravatar.loli.net/avatar/${hash}?s=512&r=pg`
    }

    async analyzeGitContributors(repoPath) {
        try {
            const git = simpleGit()
            await git.cwd(repoPath)
    
            // 获取详细日志，带上插入删除统计并排除 merge 提交
            const logs = await git.raw([
                "log",
                "--no-merges",
                "--pretty=format:%H|%an|%ae",
                "--shortstat"
            ])
    
            const lines = logs.split("\n")
            const contributors = {}
            let currentAuthor = null
    
            for (let i = 0; i < lines.length; i++) {
                const line = lines[i].trim()
    
                if (line.includes("|")) {
                    const [commitHash, name, email] = line.split("|")
                    currentAuthor = email // 用邮箱作为唯一 key 更稳妥
                    if (!contributors[currentAuthor]) {
                        contributors[currentAuthor] = {
                            name,
                            email,
                            avatar: this.getGravatarUrl(email),
                            commits: 0,
                            linesAdded: 0,
                            linesDeleted: 0,
                            filesChanged: 0,
                            linesChanged: 0 // total changes
                        }
                    }
                    contributors[currentAuthor].commits += 1
    
                    // 接下来的 shortstat 统计信息在下一行
                    const statLine = lines[i + 1]?.trim() || ""
                    const statMatch = {
                        filesChanged: statLine.match(/(\d+) file[s]? changed/),
                        insertions: statLine.match(/(\d+) insertion[s]?\(\+\)/),
                        deletions: statLine.match(/(\d+) deletion[s]?\(-\)/),
                    }
    
                    const files = statMatch.filesChanged ? parseInt(statMatch.filesChanged[1], 10) : 0
                    const insertions = statMatch.insertions ? parseInt(statMatch.insertions[1], 10) : 0
                    const deletions = statMatch.deletions ? parseInt(statMatch.deletions[1], 10) : 0
    
                    contributors[currentAuthor].filesChanged += files
                    contributors[currentAuthor].linesAdded += insertions
                    contributors[currentAuthor].linesDeleted += deletions
                    contributors[currentAuthor].linesChanged += insertions + deletions
    
                    if (statLine) i++ // 跳过 shortstat 行
                }
            }
    
            const sorted = Object.values(contributors).sort(
                (a, b) => b.linesChanged - a.linesChanged || b.commits - a.commits
            )
    
            return sorted
        } catch (err) {
            console.error("分析 Git 贡献者失败:", err)
            throw new Error("分析 Git 贡献者失败")
        }
    }
    

    async onRequest(req, res) {
        let { uuid, session, id } = req.query

        if ([uuid, session, id].some(value => value === '' || value === null || value === undefined))
            return res.json({
                ...BaseStdResponse.MISSING_PARAMETER
            })

        // 检查 session
        if (!await AccessControl.checkSession(uuid, session))
            return res.status(401).json({
                ...BaseStdResponse.ACCESS_DENIED
            })

        let sql = 'SELECT state, path FROM repos WHERE create_user = ? AND id = ?'
        let r = await db.query(sql, [uuid, id])
        if (!r || r.length === 0)
            return res.json({
                ...BaseStdResponse.ERR,
                msg: '未找到仓库'
            })

        if (r[0].state !== 1 || !r[0].path)
            return res.json({
                ...BaseStdResponse.ERR,
                msg: '仓库未成功克隆！'
            })

        let contributors
        try {
            contributors = await this.analyzeGitContributors(r[0].path)
        } catch (error) {
            this.logger.error('获取仓库开发者失败！' + error.stack)
            return res.json({
                ...BaseStdResponse.ERR,
                msg: '获取仓库开发者失败！'
            })
        }

        res.json({
            ...BaseStdResponse.OK,
            data: contributors
        })

    }
}

module.exports.GitContributors = GitContributors