jmcreater/lib/create/app.js

udc前端开发构建工具

'use strict';
var fs = require('fs-extra');
var path = require('path');
var request = require('request');

var _ = require('lodash');
var chalk = require('chalk');
var inquirer = require('inquirer');
var unzip = require('unzip');

var Base = require('./base');
var Util = require('../util');


class App extends Base {
    constructor(options) {
        super(options);
        this.conf = _.assign({
            appName: null,
            description: ''
        }, options);
        this.init();
    }

    init() {
        this.userName = process.env.USERNAME || 'UDC-Developer';
    }

    //创建新项目
    create(cb) {
        var self = this;
        this.getTemplatesInfo(function (templatesinfo) {
            self.talk(cb, templatesinfo || {})
        })
    }

    //选择希望使用的模板
    talk(cb, templatesinfo) {
        var prompts = [];
        var conf = this.conf;
        var checkAppName = function (hasName) {
            if (hasName) {
                console.log('项目名称已经存在了，换个名字吧');
            }
            /*prompts.push({
             type: 'input',
             name: "appName",
             message: "请输入项目名称~",
             validate: function (input) {
             if (!input) {
             return ''
             }
             if (fs.existsSync(input)) {
             return '项目已经存在了，换个名字吧'
             }
             return true;
             }
             })*/
        }
        if (typeof  conf.appName !== 'string') {
            checkAppName();
        } else if (fs.existsSync(conf.appName)) {
            checkAppName(true);
        }
        var tmpchoices = [];


        if (!templatesinfo.templates) {
            console.log('模板列表读取失败');
            return;
        }
        templatesinfo.templates.forEach(function (o, i) {
            tmpchoices.push(o.name);
        })

        prompts.push({
            type: 'list',
            name: 'tmpName',
            message: '请选择项目模板：',
            choices: tmpchoices
        });

        inquirer.prompt(prompts).then(function (answers) {
            answers.appName = answers.appName || conf.appName;
            answers.appDescription = answers.appDescription || conf.description;
            answers.tmpName = answers.tmpName || conf.tmpName;
            answers.author = this.userName;
            answers.data = ((new Date()).getFullYear()) + '-' + ((new Date()).getMonth() + 1) + '-' + ((new Date()).getDate());
            this.write(answers, templatesinfo.templates, cb);
        }.bind(this))
    }

    //获得模板信息，模板内容，拷贝到本地
    write(options, templatesinfo, cb) {
        var conf = this.conf = options;
        var tmpName = conf.tmpName;
        var _cache = this.readCache(path.join(Util.getTmpPath(), '_cache.json'));
        var templateCache = _cache.templates;
        var cacheId = "";  //对应模板本地的id
        var originId = ""; //服务器远程id

        if (templateCache) {
            templateCache.forEach(function (item) {
                if (tmpName === item.name) {
                    cacheId = item.id;
                }
            });
        }

        templatesinfo.forEach(function (item) {
            if (tmpName === item.name) {
                originId = item.id;
            }
        });
        if (cacheId === originId) {
            this.copyTpl(tmpName, conf.appName, cb)
        } else {
            this.downloadTpl(tmpName, function () {
                var currentItem = "";
                templateCache.forEach(function (item) {
                    if (tmpName === item.name) {
                        item.id = originId;
                        currentItem = item;
                    }
                });

                if (!currentItem) {
                    _cache.templates.push({'name': tmpName, 'id': originId});
                }
                this.writeCache(_cache, path.join(Util.getTmpPath(), '_cache.json'));

                this.copyTpl(tmpName, conf.appName, cb)
            }.bind(this));
        }


    }

    //下载远程模板到缓存路径
    downloadTpl(tmpName, cb) {
        console.log(chalk.green('  正在下载最新的模板，请稍等...'));
        var self = this;
        var _tmpPath = path.join(Util.getTmpPath(), tmpName + '.zip'); //下载后存放目录
        var setting = Util.getDefaultConfig();
        request(setting["tpl-server"] + "/" + tmpName + '.zip')
            .pipe(fs.createWriteStream(_tmpPath))
            .on('finish', function () {
                var templatesPath = path.join(Util.getTmpPath(), 'templates');
                var zip = unzip.Extract({path: templatesPath});
                zip
                    .on('close', function () {
                        fs.unlinkSync(_tmpPath);
                        cb();
                    })
                    .on('error', function (err) {
                        console.log(err);
                    });
                fs.createReadStream(_tmpPath)
                    .pipe(zip);
            });
    }

    //复制模板到指定目录
    copyTpl(tmpName, appName, cb) {
        var templatesPath = path.join(Util.getTmpPath(), 'templates', tmpName);
        var targetPath = appName ? (path.join(process.cwd(), appName)) : process.cwd();
        fs.copy(templatesPath, targetPath, function () {
            cb();
        })
    }
}

module.exports = App;