Hw 6

src/AC/index.js

@@ -1,6 +1,6 @@
 import {
-    INCREMENT, DELETE_ARTICLE, CHANGE_DATE_RANGE, CHANGE_SELECTION, ADD_COMMENT, LOAD_ALL_ARTICLES, LOAD_ARTICLE,
-    START, SUCCESS, FAIL
+    INCREMENT, DELETE_ARTICLE, CHANGE_DATE_RANGE, CHANGE_SELECTION, ADD_COMMENT, LOAD_ALL_ARTICLES,
+    LOAD_ARTICLE, LOAD_COMMENTS, START, SUCCESS, FAIL
 } from '../constants'
 
 export function increment() {
@@ -72,4 +72,12 @@ export function loadArticle(id) {
 
         }, 1000)
     }
+}
+
+export function loadComments(articleId) {
+    return {
+        type: LOAD_COMMENTS,
+        payload: { articleId },
+        callAPI: `/api/comment?article=${articleId}`
+    }
 }

src/components/Article/index.js

@@ -6,6 +6,7 @@ import {connect} from 'react-redux'
 import CommentList from '../CommentList'
 import Loader from '../common/Loader'
 import {deleteArticle, loadArticle} from '../../AC'
+import {commentsLoadingSelector, commentsLoadedSelector} from '../../selectors'
 import './style.css'
 
 class Article extends PureComponent {
@@ -61,14 +62,15 @@ class Article extends PureComponent {
     }
 
     getBody() {
-        const { isOpen, article } = this.props
+        const { isOpen, article, loadingComments, loadedComments } = this.props
         if (!isOpen) return null
         if (article.loading) return <Loader/>
 
         return (
             <div>
                 <section>{article.text}</section>
-                <CommentList article = {article} ref = {this.setCommentsRef} key = {this.state.count}/>
+                <CommentList article = {article} loading = {loadingComments} loaded = {loadedComments}
+                    ref = {this.setCommentsRef} key = {this.state.count}/>
             </div>
         )
 
@@ -97,5 +99,18 @@ class Article extends PureComponent {
 
 }
 
+const createMapStateToProps = () => {
+    return (state, ownProps) => {
+        const articleId = ownProps.article.id
+        const loading = commentsLoadingSelector(state)
+        const loadingComments = loading.get(articleId) != null ? loading.get(articleId) : true
+        const loaded = commentsLoadedSelector(state)
+        const loadedComments = loaded.get(articleId)
+        return {
+            loadingComments: loadingComments,
+            loadedComments: loadedComments
+        }
+    }
+}
 
-export default connect(null, { deleteArticle, loadArticle })(Article)
+export default connect(createMapStateToProps, { deleteArticle, loadArticle })(Article)

src/components/CommentList.js

@@ -3,6 +3,9 @@ import PropTypes from 'prop-types'
 import CommentForm from './CommentForm'
 import Comment from './Comment'
 import toggleOpen from '../decorators/toggleOpen'
+import {loadComments} from '../AC'
+import Loader from './common/Loader'
+import store from '../store'
 
 class CommentList extends Component {
     static propTypes = {
@@ -12,6 +15,10 @@ class CommentList extends Component {
         toggleOpen: PropTypes.func
     }
 
+    componentWillReceiveProps({ isOpen, article, loaded}) {
+        if (!this.props.isOpen && isOpen && !loaded) store.dispatch(loadComments(article.id))
+    }
+
     render() {
         const {isOpen, toggleOpen} = this.props
         const text = isOpen ? 'hide comments' : 'show comments'
@@ -24,9 +31,10 @@ class CommentList extends Component {
     }
 
     getBody() {
-        const {article: { comments, id }, isOpen} = this.props
+        const {article: { comments, id }, isOpen, loading} = this.props
         if (!isOpen) return null
 
+        if (loading) return <Loader />
         const body = comments.length ? (
             <ul>
                 {comments.map(id => <li key = {id}><Comment id = {id} /></li>)}

src/constants/index.js

@@ -8,6 +8,7 @@ export const CHANGE_SELECTION = 'CHANGE_SELECTION'
 export const CHANGE_DATE_RANGE = 'CHANGE_DATE_RANGE'
 
 export const ADD_COMMENT = 'ADD_COMMENT'
+export const LOAD_COMMENTS = 'LOAD_COMMENTS'
 
 export const START = '_START'
 export const SUCCESS = '_SUCCESS'

src/reducer/comments.js

@@ -1,16 +1,42 @@
-import { ADD_COMMENT } from '../constants'
-import {normalizedComments} from '../fixtures'
+import { Map, Record } from 'immutable'
+import { ADD_COMMENT, LOAD_COMMENTS, START, SUCCESS } from '../constants'
 import {arrToMap} from './utils'
 
-export default (state = arrToMap(normalizedComments), action) => {
-    const { type, payload, randomId } = action
+const CommentRecord = Record({
+    id: null,
+    user: null,
+    text: null,
+})
+
+const idRecord = Record({
+    id: null
+})
+
+const ReducerRecord = Record({
+    entities: arrToMap([], CommentRecord),
+    loading: arrToMap([], idRecord),
+    loaded: arrToMap([], idRecord),
+    error: arrToMap([], idRecord)
+})
+
+export default (state = new ReducerRecord(), action) => {
+    const { type, payload, randomId} = action
 
     switch (type) {
         case ADD_COMMENT:
-            return state.set(randomId, {
-                ...payload.comment,
-                id: randomId
-            })
+            return state.mergeIn(['entities'], arrToMap([{
+                id: randomId,
+                user: payload.comment.user,
+                text: payload.comment.text
+            }], CommentRecord))
+        case LOAD_COMMENTS + START:
+            return state.setIn(['loading', payload.articleId], true)
+        case LOAD_COMMENTS + SUCCESS:
+            const { response } = action
+            return state
+                .setIn(['loading', payload.articleId], false)
+                .setIn(['loaded', payload.articleId], true)
+                .mergeIn(['entities'], arrToMap(response, CommentRecord))
     }
 
     return state

src/selectors/index.js

@@ -3,7 +3,9 @@ import {createSelector} from 'reselect'
 export const articlesMapSelector = state => state.articles.entities
 export const articlesLoadingSelector = state => state.articles.loading
 export const filtersSelector = state => state.filters
-export const commentListSelector = state => state.comments
+export const commentsMapSelector = state => state.comments.entities
+export const commentsLoadingSelector = state => state.comments.loading
+export const commentsLoadedSelector = state => state.comments.loaded
 export const idSelector = (_, props) => props.id
 
 export const articlesSelector = createSelector(articlesMapSelector, articles => articles.valueSeq().toArray())
@@ -18,6 +20,6 @@ export const filtratedArticlesSelector = createSelector(articlesSelector, filter
     })
 })
 
-export const createCommentSelector = () => createSelector(commentListSelector, idSelector, (comments, id) => {
+export const createCommentSelector = () => createSelector(commentsMapSelector, idSelector, (comments, id) => {
     return comments.get(id)
 })