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2018.11.16 16:07 Meteor/React + Meteor

Meteor에서 Redux 환경을 설정하고, 애플리케이션에 적용해 본다.


  - Meteor Collection의 Pub/Sub 설정

  - Collection의 CRUD 서비스 클래스 개발

  - Redux 환경 설정

  - Redux의 action, reducer 개발 및 store 설정

  - 애플리케이션에 Redux action 호출하기

  - 소스코드 




MongoDB Collection Pub/Sub 설정


기본설치를 하게 되면 autopublish 미티어 패키지가 설치되어 있다. 삭제한다.

$ meteor remove autopublish


삭제를 하면 links 컬렉션으로 부터 데이터를 받지 못한다. 이제 필요한 것을 받기 위해 publish, subscribe를 설정한다. 

  - server/main.tsx에서 insertLink 코드를 제거한다.

  - server/main.tsx에서 links 코드 import 문을 수정한다. 

// main.tsx 전체코드

import { Meteor } from 'meteor/meteor';

import '../imports/api/links';  // 서버에서 사용하기 위해 반드시 import해야 한다. 하지 않으면 collection 생성, 제어를 못 한다.


Meteor.startup(() => { }); // 텅빈 코드 블록


  - imports/api/links.ts 에 publish 한다. 

if (Meteor.isServer) {

  Meteor.publish('links', () => Links.find());

}


  - subscribe를 사용할 때 미티어의 Tracker.autorun을 사용하지 않고, React의 props에 subscribe정보를 바로 맵핑해 주는 withTracker를 사용하기 위해 react-meteor-data 패키지를 사용한다.

$ meteor npm install --save react-meteor-data


  - imports/api/ui/Info.tsx에 withTracker를 설정한다. 

import { Meteor } from 'meteor/meteor';

import Links from '../api/links';


interface InfoProps {

links: any;

loading: boolean;

}


// 맨 하단

export default withTracker(() => {

       const handle = Meteor.subscribe('links');

return {

links: Links.find().fetch(),

loading: !handle.ready()

}

})(Info);




MongoDB Collection CRUD


간단한 Link CRUD 애플리케이션을 만든다. 


  - Collection의 CRUD 로직을 담은 service를 생성한다. imports/ui밑에 link폴더를 생성한다. 

// imports/ui/link/link.service.ts

import Links from '../api/links';


class LinkService {

  addLink({title, url}) {

    Links.insert({title, url, createAt: new Date()});

  }


  removeLink(_id: string) {

    Links.remove(_id);

  }


  updateLink(_id: string, {title, url}) {

    Links.update(_id, {title, url, updateAt: new Date()});

  }

}


export const linkService = new LinkService();


  - imports/ui/link/AddLink.tsx 파일 추가

import * as React from 'react';

import { linkService } from './links.service';

export interface AddLinkProps {

}

export default class AddLink extends React.Component<AddLinkProps, any> {

  handleSubmit = (e: any) => {

    //ignore validation

    e.preventDefault();

    const param = {

      title: e.target.title.value,

      url: e.target.url.value

    }

    linkService.addLink(param);

  };


  public render() {

    return (

      <form onSubmit={this.handleSubmit} >

        <input type="text" name="title" placeholder="title" />

        <input type="text" name="url" placeholder="url" />

        <button>Add Link</button>

      </form>

    )

  }

}


  - imports/ui/App.tsx에서 <Info/> 만 남기고 삭제하고, Info.tsx에 AddLink를 추가한다. 

// App.tsx

class App ... {

  render() { 

    return (

      <div></InfoContainer/></div>

    )

  }

}


// Info.tsx
class Info ... {
  render() {
    return(
      <div> 
          <AddLink />
          ....
       </div>
    )
  }
}


  - link폴더 밑에 LinkList.tsx와 Link.tsx를 추가한다. 

// Link.tsx

import * as React from 'react';

export interface LinkProps {

  link: any

}


export default class Link extends React.Component<LinkProps, any> {

  public render() {

    const { link } = this.props;

    return (

      <li key={link._id}>

        <a href={link.url} target="_blank">{link.title}</a>

      </li>

    );

  }

}


// LinkList.tsx

import * as React from 'react';

import Link from './Link';

export interface LinkListProps {

  links: any[]

}


export default class LinkList extends React.Component<LinkListProps, any> {

  public render() {

    const links = this.props.links.map(

      link => <Link link={link}/>

    );

    return (

      <div>

        <h2>Links</h2>

        <ul>{links}</ul>

      </div>

    );

  }

}



  - Info.tsx에서 LinkList를 사용토록 변경한다. 

class Info extends React.Component<InfoProps, any> {

  linkList() {

    const { links, loading } = this.props;

    if (loading) {

      return <div>loading...</div>

    } else {

      return <LinkList links={links} />

    }

  }


  render() {

    const { links } = this.props;

    return (

      <div>

        <AddLink />

        {this.linkList()}

      </div>

    );

  }

}


  - 마지막으로 link 삭제를 한다. 

// imports/ui/link.Link.tsx

import * as React from 'react';

import { linkService } from './links.service';


export interface LinkProps {

  link: any

}


export default class Link extends React.Component<LinkProps, any> {

  removeLink = () => {

    const { link } = this.props;

    linkService.removeLink(link._id);

  }


  public render() {

    const { link } = this.props;

    return (

      <li key={link._id}>

        <a href={link.url} target="_blank">{link.title}</a>

        <button onClick={this.removeLink}> x </button>

      </li>

    );

  }

}





Redux 관련 패키지 설치


redux 기본 패키지를 설치한다. 

$ meteor npm install --save redux react-redux react-router-redux

$ meteor npm install --save-dev @types/react-redux  @types/react-router-redux


redux action, reducer을 보다 편하게 사용할 수 있는 typesafe-actions 모듈을 설치한다.

$ meteor npm install --save typesafe-actions 


redux에서 비동기를 처리할 수 있는 redux-observable 과 rxjs 모듈을 설치한다. 

$ meteor npm install --save redux-observable rxjs


state 갱신으로 인한 반복 rendering을 제거해 성능향상을 위한 reselect 모듈도 설치한다. 

$ meteor npm install --save reselect




Redux 코드 개발


link action 개발

  - action type constants 정의

  - action Model 정의

  - action  에 대한 정의

// imports/ui/pages/link/link.action.ts

import { action } from 'typesafe-actions';


/**************************

 * constants, model

 **************************/

// constants

export const ADD_REQUEST = '[link] ADD_REQUEST';

export const ADD_SUCCESS = '[link] ADD_SUCCESS';

export const ADD_FAILED = '[link] ADD_FAILED';

export const DELETE_REQUEST = '[link] DELETE_REQUEST';

export const DELETE_SUCCESS = '[link] DELETE_SUCCESS';

export const DELETE_FAILED = '[link] DELETE_FAILED';

export const CHANGE = '[link] CHANGE';


// model

export type LinkModel = {

  _id?: string;

  title?: string;

  url?: string;

  visited?: boolean;

  error?: boolean;

  errorMsg?: any;

  success?: boolean;

  createdAt?: any;

  updatedAt?: any;

};


/**************************

 * actions, action-type

 **************************/

export const addLink = (params: LinkModel) => action(ADD_REQUEST, params);

export const addLinkSuccess = (params: LinkModel) => action(ADD_SUCCESS, params);

export const addLinkFailed = (params: LinkModel) => action(ADD_FAILED, params);

export const removeLink = (id: string) => action(DELETE_REQUEST, id);

export const removeLinkSuccess = (id: string) => action(DELETE_SUCCESS, id);

export const removeLinkFailed = (id: string) => action(DELETE_FAILED, id);

export const changeLink = (id: string) => action(CHANGE, id);


link reducer 개발

  - Link State 정의

  - LinkAction 타입 

  - Link reducer 분기

  - reselect를 이용한 selector는 별도로 만들지 않고, link.reduer.ts 파일이 함께 둔다. (파일이 너무 많아져서...)

// imports/ui/pages/link/link.reducer.ts

import { ActionType } from 'typesafe-actions';

import { combineReducers } from 'redux';

import { createSelector } from 'reselect';

import * as actions from './link.action';


/**************************

 * state

 **************************/

// state

export type LinkState = {

  list: actions.LinkModel[],

  linkFilter: string

};


/**************************

 * reducers

 **************************/

export type LinkAction = ActionType<typeof actions>;

export const linkReducer = combineReducers<LinkState, LinkAction>({

  list: (state = [], action) => {

    switch (action.type) {

      case actions.ADD_FAILED:

        return state;

      case actions.ADD_SUCCESS:

        return [...state, action.payload];

      case actions.DELETE_FAILED:

        return state;

      case actions.DELETE_SUCCESS:

        return state.filter(item => item._id === action.payload);

      case actions.CHANGE:

        return state.map(

          item =>

            item._id === action.payload

              ? { ...item, visited: !item.visited }

              : item

        );

      default:

        return state;

    }

  },

  linkFilter: (state = '', action) => {

    switch (action.type) {

      case actions.CHANGE:

        if (action.payload === 'visited'){

          return '';

        } else {

          return 'visited';

        }

      default:

        return state;

    }

  }

})


/**************************

 * selectors

 **************************/

export const getLinks = (state: LinkState) => state.list;

export const getLinkFilter = (state: LinkState) => state.linkFilter;

export const getFilteredLinks = createSelector(getLinks, getLinkFilter, (links, linkFilter) => {

  switch (linkFilter) {

    case 'visited':

      return links.filter(t => t.visited);

    default:

      return links;

  }

});


redux-observable을 이용한 epic을 만든다.

  - async 처리

  - rxjs 이용

  - takeUntil은 cancel을 위한 장치이다.

// imports/ui/pages/link/link.epic.ts

import { Epic, combineEpics } from 'redux-observable';

import { filter, map, switchMap, takeUntil } from 'rxjs/operators';

import { isOfType } from 'typesafe-actions';


import Links from '../../../api/links';

import { insertCollection, removeCollection, RequestModel } from '../../sdk';

import * as actions from './link.action';


const addLink: Epic = (

  action$,

  store

) =>

  action$.pipe(

    filter(isOfType(actions.ADD_REQUEST)),

    switchMap(action => {

      const { title, url } = action.payload;

      return insertCollection(Links, { title, url, createdAt: new Date() })

    }),

    map((response: RequestModel) => {

      if (response.error) {

        return actions.addLinkFailed({ ...response.result })

      }

      return actions.addLinkSuccess(response.result)

    }),

    // takeUntil(action$.pipe(

    //   filter(isOfType(actions.ADD_REQUEST))

    // ))

  );


const removeLink: Epic = (

  action$,

  store

) =>

  action$.pipe(

    filter(isOfType(actions.DELETE_REQUEST)),

    switchMap(action => {

      return removeCollection(Links, action.payload);

    }),

    map((response: RequestModel) => {

      if (response.error) {

        return actions.removeLinkFailed({ ...response.result, ...response.params })

      }

      return actions.removeLinkSuccess(response.params._id);

    }),

    // takeUntil(action$.pipe(

    //   filter(isOfType(actions.ADD_REQUEST))

    // ))

  );


export const linkEpic = combineEpics(addLink, removeLink);


Meteor Client Collection 을 Observable로 전환

  - meteor client collection의 insert, remove시에 call 결과를 Observable로 변환하여 반환하는 유틸을 만든다. 

  - 이는 redux-observable의 epic에서 async 데이터를 switchMap 오퍼레이터로 다루기 위함이다. 

// imports/sdk/util/ddp.util.ts

import { from, Observable } from 'rxjs';


export type RequestModel = {

  error?: boolean;

  success?: boolean;

  result: any;

  params?: any;

}


export function insertCollection(collection: any, params: any): Observable<RequestModel> {

  return from(new Promise((resolve, reject) => {

    collection.insert(params, (error, result) => {

      if (error) {

        reject({ error: true, result: { ...error }, params: { ...params } });

      }

      if (typeof result === 'string' || typeof result === 'number') {

        resolve({ success: true, result, params: {...params} });

      } else {

        resolve({ success: true, result: { ...result }, params: { ...params } });

      }

    });

  }));

}


export function removeCollection(collection: any, _id: string): Observable<RequestModel> {

  return from(new Promise((resolve, reject) => {

    collection.remove(_id, (error, result) => {

      if (error) {

        reject({ error: true, result: { ...error }, params: { _id } });

      }

      if (typeof result === 'string' || typeof result === 'number') {

        resolve({ success: true, result, params: { _id } });

      } else {

        resolve({ success: true, result: { ...result }, params: { _id } });

      }

    });

  }));

}




RootReducer와 Store 설정


link관련 action, reducer, epic 개발이 끝나면 이를 등록하는 설정을 한다. 

  - root Reducer 정의

  - root State  타입 정의

  - root Action 타입 정의

  - root Epic 정의

  - root Store 설정

// imports/ui/store.ts

import { combineEpics, createEpicMiddleware } from 'redux-observable';

import { createStore, applyMiddleware, combineReducers, compose } from 'redux';

import { RouterAction, LocationChangeAction } from 'react-router-redux';

import { routerReducer } from 'react-router-redux';

import { StateType } from 'typesafe-actions'; 


import { linkEpic } from './pages/link/link.epic';

import { linkReducer, LinkAction } from './pages/link/link.reducer';


/***********************

 * root reducer

 ***********************/

const rootReducer = combineReducers({

  router: routerReducer,

  links: linkReducer

});


/***********************

 * root state

 ***********************/

export type RootState = StateType<typeof rootReducer>;


type ReactRouterAction = RouterAction | LocationChangeAction;

export type RootAction = ReactRouterAction | LinkAction;


/***********************

 * root epic

 ***********************/

const composeEnhancers =

  (process.env.NODE_ENV === 'development' &&

    (window as any) &&

    (window as any).__REDUX_DEVTOOLS_EXTENSION_COMPOSE__) ||

  compose;


const rootEpic = combineEpics(linkEpic);

const epicMiddleware = createEpicMiddleware();


/***********************

 * root store

 ***********************/

function configureStore(initialState?: object) {

  // configure middlewares

  const middlewares = [epicMiddleware];

  // compose enhancers

  const enhancer = composeEnhancers(applyMiddleware(...middlewares));

  // create store

  const store = createStore(rootReducer, enhancer);

  // run epic: https://redux-observable.js.org/docs/basics/SettingUpTheMiddleware.html

  epicMiddleware.run(rootEpic);

  return store;

}


const store = configureStore();

export default store;


애플리케이션에 store를 최종 설정한다. 

// client/main.tsx

import * as React from 'react';

import { Meteor } from 'meteor/meteor';

import { render } from 'react-dom';

import { Provider } from 'react-redux';


import App from '../imports/ui/App'

import store from '../imports/ui/store';


const Root = (

  <Provider store={store}>

    <App />

  </Provider>

);


Meteor.startup(() => {

  render(Root, document.getElementById('react-target'));

});


window 객체 인식을 위해 type definition을 정의한다. 

  - 루트에 typings 폴더 생성

  - typings/index.d.ts 파일 생성

declare var window: any;




Application에서 Redux Action 호출하기


add/remove link 리덕스 액션을 애플리케이션에 적용한다. link.service.ts 는 사용하지 않는다. 

  - AddLink.tsx에 addLink 액션 적용

// imports/ui/link/AddLink.tsx

import * as React from 'react';

import { connect } from 'react-redux';

import { addLink } from './link.action';


export interface AddLinkProps {

  addLink: Function;

}


class AddLink extends React.Component<AddLinkProps, any> {

  handleSubmit = (e: any) => {

    //ignore validation

    e.preventDefault();

    const param = {

      title: e.target.title.value,

      url: e.target.url.value

    }

    const { addLink } = this.props;

    addLink(param);

  };


  public render() {

    return (

      <form onSubmit={this.handleSubmit} >

        <input type="text" name="title" placeholder="title" />

        <input type="text" name="url" placeholder="url" />

        <button>Add Link</button>

      </form>

    )

  }

}


export default connect(undefined, { addLink })(AddLink);


  - Link.tsx에 removeLink 액션 적용

// imports/ui/pages/link/Link.tsx

import * as React from 'react';

import { removeLink } from './link.action';

import { connect } from 'react-redux';


export interface LinkProps {

  link: any,

  removeLink: Function

}

class Link extends React.Component<LinkProps, any> {

  removeLink = () => {

    const { link, removeLink } = this.props;

    removeLink(link._id);

  }


  public render() {

    const { link } = this.props;

    return (

      <li key={link._id}>

        <a href={link.url} target="_blank">{link.title}</a>

        <button onClick={this.removeLink}> x </button>

      </li>

    );

  }

}


export default connect(undefined, { removeLink })(Link);





<참조>

- 블로그 소스 코드

react-redux-typescript-guide 소스

- redux-actions 사용하기

- redux-observable 사용하기

- typesafe-actions 사용하기

- reselect 사용하여 성능 최적화 하기

posted by peter yun 윤영식