Get best of the week

它可能是另一个javascript框架。

去年夏天，在为Habr 编写文章的过程中，我不太懒惰将我的后端应用程序模板打包到npm包中的Node.js上，使其成为快速入门的cli-utility。


除我之外，没有其他人会最初使用此软件包。但是，当我决定通过引入所需的功能来更新模板时，我注意到npm软件包每周有几十个下载，而github上的项目有12个星级。好的人肯定会给予我支持，而不是为了这个项目。只有12颗星，但这足以让我决定我要开发卡尔卡斯，似乎不仅对我来说是必要的。


尽管最初我决定为后端应用程序创建一个轻量级框架，但在开发过程中，我还是使自己确信不需要这辆自行车。那个“ karcass”不应该是一个框架，而应该是一个从模板创建应用程序的通用工具。


图片


在第一个版本中，气候脚本的逻辑是原始的。


  1. .
  2. karcass template .
  3. , ( - , ) ( ).
  4. , npm install.

:


图片


. , .


, : Application , , . , :


Application.ts
import Express from 'express'
import { AbstractConsoleCommand } from './Base/Console/AbstractConsoleCommand'
import { DbService } from './Database/Service/DbService'
import { HelpCommand } from './Base/Console/HelpCommand'
import { LoggerService } from './Logger/Service/LoggerService'
import { IssueService } from './Project/Service/IssueService'
import { GitlabService } from './Gitlab/Service/GitlabService'
import { LocalCacheService } from './Base/Service/LocalCacheService'
import { ProjectService } from './Project/Service/ProjectService'
import { GroupService } from './Project/Service/GroupService'
import { UserService } from './User/Service/UserService'
import { UpdateProjectsCommand } from './Gitlab/Console/UpdateProjectsCommand'
import { CreateMigrationCommand } from './Database/Console/CreateMigrationCommand'
import { MigrateCommand } from './Database/Console/MigrateCommand'
import { MigrateUndoCommand } from './Database/Console/MigrateUndoCommand'
import IssueController from './Project/Controller/IssueController'
import fs from 'fs'

export class Application {
    public http!: Express.Express

    // Services
    public localCacheService!: LocalCacheService
    public loggerService!: LoggerService
    public dbService!: DbService
    public gitlabService!: GitlabService
    public issueService!: IssueService
    public projectService!: ProjectService
    public groupService!: GroupService
    public userService!: UserService

    // Commands
    public helpCommand!: HelpCommand
    public createMigrationCommand!: CreateMigrationCommand
    public migrateCommand!: MigrateCommand
    public migrateUndoCommand!: MigrateUndoCommand
    public updateProjectsCommand!: UpdateProjectsCommand

    // Controllers
    public issueController!: IssueController

    public constructor(public readonly config: IConfig) {
        if (config.columns.length < 2) {
            throw new Error('There are too few columns :-(')
        }
    }

    public async run() {
        this.initializeServices()
        if (process.argv[2]) {
            this.initializeCommands()
            for (const command of Object.values(this)
                .filter((c: any) => c instanceof AbstractConsoleCommand) as AbstractConsoleCommand[]
            ) {
                if (command.name === process.argv[2]) {
                    await command.execute()
                    process.exit()
                }
            }
            await this.helpCommand.execute()
            process.exit()
        } else {
            this.runWebServer()
        }
    }

    protected runWebServer() {
        this.initCron()
        this.http = Express()
        this.http.use('/', Express.static('vue/dist'))
        this.http.use((req, res, next) => {
            if (req.url.indexOf('/api') === -1) {
                res.header('Cache-Control', 'private, no-cache, no-store, must-revalidate')
                res.header('Expires', '-1')
                res.header('Pragma', 'no-cache')
                return res.send(fs.readFileSync('vue/dist/index.html').toString())
            }
            next()
        })
        this.http.use(Express.urlencoded())
        this.http.use(Express.json())
        this.http.listen(this.config.listen, () => console.log(`Listening on port ${this.config.listen}`))

        this.initializeControllers()
    }

    protected initCron() {
        if (this.config.gitlab.updateInterval) {
            setInterval(async () => {
                if (!this.updateProjectsCommand) {
                    this.updateProjectsCommand = new UpdateProjectsCommand(this)
                }
                await this.updateProjectsCommand.execute()
            }, this.config.gitlab.updateInterval * 1000)
        }
    }

    protected initializeServices() {
        this.localCacheService = new LocalCacheService(this)
        this.gitlabService = new GitlabService(this)
        this.loggerService = new LoggerService(this)
        this.dbService = new DbService(this)
        this.issueService = new IssueService(this)
        this.projectService = new ProjectService(this)
        this.groupService = new GroupService(this)
        this.userService = new UserService(this)
    }

    protected initializeCommands() {
        this.helpCommand = new HelpCommand(this)
        this.createMigrationCommand = new CreateMigrationCommand(this)
        this.migrateCommand = new MigrateCommand(this)
        this.migrateUndoCommand = new MigrateUndoCommand(this)
        this.updateProjectsCommand = new UpdateProjectsCommand(this)
    }

    protected initializeControllers() {
        this.issueController = new IssueController(this)
    }

}

ProjectService.ts
import { AbstractService } from '../../Base/Service/AbstractService'
import { Project } from '../Entity/Project'

export class ProjectService extends AbstractService {

    public get projectRepository() {
        return this.app.dbService.connection.getRepository(Project)
    }

    public async updateProjects(allTime = false) {
        await this.app.groupService.updateGroups()
        for (const data of await this.app.gitlabService.getProjects()) {
            let project = await this.getProject(data.id)

            if (!project) {
                project = this.projectRepository.create({ id: data.id })
            }
            project.name = data.name
            project.url = data.web_url
            project.updatedTimestamp = Math.round(new Date(data.last_activity_at).getTime() / 1000)
            project.groupId = data.namespace && data.namespace.kind === 'group' ? data.namespace.id : null
            await this.projectRepository.save(project)
            await this.app.issueService.updateProjectIssues(project, allTime)
        }
    }

    public async getProject(id: number): Promise<Project|undefined> {
        return id ? this.app.localCacheService.get(`project.${id}`, () => this.projectRepository.findOne(id)) : undefined
    }

}

, , , . , DI-, cli.


Application.ts , « ». .


Application.ts
import CreateExpress, { Express } from 'express';
import { TwingEnvironment, TwingLoaderFilesystem } from 'twing';
import { Container } from '@karcass/container';
import { Cli } from '@karcass/cli';
import { Connection, createConnection } from 'typeorm';
import { CreateMigrationCommand, MigrateCommand, MigrateUndoCommand } from '@karcass/migration-commands';
import { createLogger } from './routines/createLogger';
import { Logger } from 'winston';
import { FrontPageController } from './SampleBundle/Controller/FrontPageController';
import { Message } from './SampleBundle/Entity/Message';
import { MessagesService } from './SampleBundle/Service/MessagesService';

export class Application {
    private container = new Container();
    private console = new Cli();
    private controllers: object[] = [];
    private http!: Express;

    public constructor(public readonly config: IConfig) { }

    public async run() {
        await this.initializeServices();

        if (process.argv[2]) {
            this.initializeCommands();
            await this.console.run();
        } else {
            this.runWebServer();
        }
    }

    protected runWebServer() {
        this.http = CreateExpress();
        this.http.use('/public', CreateExpress.static('public'));
        this.http.use(CreateExpress.urlencoded());
        this.http.listen(this.config.listen, () => console.log(`Listening on port ${this.config.listen}`));

        this.container.add<Express>('express', () => this.http);
        this.container.add(TwingEnvironment, () => new TwingEnvironment(new TwingLoaderFilesystem('src')));

        this.initializeControllers();
    }

    protected async initializeServices() {
        await this.container.addInplace<Logger>('logger', () => createLogger(this.config.logdir));
        const typeorm = await this.container.addInplace(Connection, () => createConnection({
            type: 'sqlite',
            database: 'db/sample.sqlite',
            entities: ['build/**/Entity/*.js'],
            migrations: ['build/**/Migrations/*.js'],
            logging: ['error', 'warn', 'migration'],
        }));
        this.container.add('Repository<Message>', () => typeorm.getRepository(Message));
        this.container.add(MessagesService);
    }

    protected initializeCommands() {
        this.console.add(CreateMigrationCommand, () => new CreateMigrationCommand());
        this.console.add(MigrateCommand, async () => new MigrateCommand(await this.container.get(Connection)));
        this.console.add(MigrateUndoCommand, async () => new MigrateUndoCommand(await this.container.get(Connection)));
    }

    protected async initializeControllers() {
        this.controllers.push(
            await this.container.inject(FrontPageController),
        );
    }

}

TypeScript :


FrontPageController.ts
import { Express } from 'express';
import { Dependency } from '@karcass/container';
import { TwingEnvironment } from 'twing';
import { AbstractController, QueryData } from './AbstractController';
import { MessagesService } from '../Service/MessagesService';

export class FrontPageController extends AbstractController {

    public constructor(
        @Dependency('express') protected express: Express,
        @Dependency(TwingEnvironment) protected twing: TwingEnvironment,
        @Dependency(MessagesService) protected messagesService: MessagesService,
    ) {
        super(express);

        this.onQuery('/', 'get', this.frontPageAction);
        this.onQuery('/', 'post', this.sendMessageAction);
    }

    public async sendMessageAction(data: QueryData) {
        await this.messagesService.addMessage(data.params.text);
        data.res.redirect('/');
    }

    public async frontPageAction() {
        if (await this.messagesService.isEmpty()) {
            await this.messagesService.createSampleMessages();
        }
        return this.twing.render('SampleBundle/Views/front.twig', {
            messages: await this.messagesService.getMessages(),
        });
    }

}

JavaScript, «»:


protected async initializeControllers() {
    this.controllers.push(
        new FrontPageController(
            await this.container.get('express'),
            await this.container.get(TwingEnvironment),
            await this.container.get(MessagesService),
        ),
    );
}

template karcass, : . , .


: TemplateReducer.ts TemplateReducer.js, TemplateReducer, :


interface TemplateReducerInterface {
    getConfigParameters(): Promise<ConfigParametersResult>
    getConfig(): Record<string, any>
    setConfig(config: Record<string, any>): void
    getDirectoriesForRemove(): Promise<string[]>
    getFilesForRemove(): Promise<string[]>
    getDependenciesForRemove(): Promise<string[]>
    getFilesContentReplacers(): Promise<ReplaceFileContentItem[]>
    finish(): Promise<void>
    getTestConfigSet(): Promise<Record<string, any>[]>
}

, , , - , karcass , JavaScript/TypeScript. -. - webpack. , - create-react-app ... , vue create.


TemplateReducerInterface, , . karcass:


hello index.js :


console.log('Hello, [replacethisname]!')

TemplateReducer.js, karcass' :


const reducer = require('@karcass/template-reducer')
const Type = reducer.ConfigParameterType

class TemplateReducer extends reducer.AbstractTemplateReducer {
    getConfigParameters() {
        return [
            { name: 'name', description: 'Please enter your name', type: Type.string },
        ]
    }
    async getFilesContentReplacers() {
        return [
            { filename: 'index.js', replacer: (content) => {
                return content.replace('[replacethisname]', this.config.name)
            } },
        ]
    }
    async finish() {
        console.log(`Application installed, to launch it execute\n  cd ${this.directoryName} && node index.js`)it.`)
    }
}
module.exports = { TemplateReducer }

, , , — @karcass/template-reducer, , package.json:


npm init && npm install @karcass/template-reducer

, getDependenciesForRemove, karcass .


karcass . , .


图片


, karcass . github.com, :


npx karcass create helloworld https://github.com/karcass-ts/hello-world

, -, :


npx karcass create ooohhhh-ok-show-it

? , TemplateReducer helloworld- :


    getTestConfigSet() {
        return [
            { name: 'testname1' },
            { name: 'testname2' },
        ]
    }

:


npx karcass test www/karcass/hello

— . , , , :


图片


我决定不对karcass的所有功能进行描述，而只是做一个小的事实调查记录，以进行介绍和收集反馈：任何反馈对我来说都是有用的，以了解下一步该做什么以及是否值得。同时，编写文档是优先事项。


github上的Karcass存储库 ;

Source: https://habr.com/ru/post/undefined/

More articles:


All Articles