Implement basic version of likes

app/controllers/likes_controller.rb

@@ -14,10 +14,12 @@ class LikesController < ApplicationController
   end
 
   def destroy
-    like = Like.where(like_params)
+    like = Like.find_by(like_params)
+    
+    return if like.nil?
 
     if like.destroy
-      render json: {}, status: :no_content
+      render json: {}, status: :accepted
     else
       render json: {
         error: I18n.t('errors.likes.destroy', message: like.errors.full_messages)
@@ -28,6 +30,9 @@ class LikesController < ApplicationController
   private
 
     def like_params
-      params.permit(:post_id).merge(user_id: current_user.id)
+      {
+        post_id: params[:post_id],
+        user_id: current_user.id,
+      }
     end
 end

app/javascript/actions/submitLike.ts

@@ -0,0 +1,41 @@
+import { Action } from "redux";
+import { ThunkAction } from "redux-thunk";
+
+import { State } from "../reducers/rootReducer";
+
+export const LIKE_SUBMIT_SUCCESS = 'LIKE_SUBMIT_SUCCESS';
+interface LikeSubmitSuccessAction {
+  type: typeof LIKE_SUBMIT_SUCCESS,
+  postId: number;
+  isLike: boolean;
+}
+
+export type LikeActionTypes = LikeSubmitSuccessAction;
+
+const likeSubmitSuccess = (postId: number, isLike: boolean): LikeSubmitSuccessAction => ({
+  type: LIKE_SUBMIT_SUCCESS,
+  postId,
+  isLike,
+});
+
+export const submitLike = (
+  postId: number,
+  isLike: boolean,
+  authenticityToken: string,
+): ThunkAction<void, State, null, Action<string>> => async (dispatch) => {
+  try {
+    const res = await fetch(`/posts/${postId}/likes`, {
+      method: isLike ? 'POST' : 'DELETE',
+      headers: {
+        Accept: 'application/json',
+        'Content-Type': 'application/json',
+        'X-CSRF-Token': authenticityToken,
+      },
+    });
+
+    if (res.status === 201 || res.status === 202)
+      dispatch(likeSubmitSuccess(postId, isLike));
+  } catch (e) {
+    console.log('An error occurred while liking a post');
+  }
+}

app/javascript/components/Board/BoardP.tsx

@@ -97,16 +97,19 @@ class BoardP extends React.Component<Props> {
         <PostList
           posts={posts.items}
           postStatuses={postStatuses.items}
-          hasMore={posts.haveMore}
           areLoading={posts.areLoading}
           error={posts.error}
           
+          hasMore={posts.haveMore}
           handleLoadMore={() =>
             posts.areLoading ?
               null
             :
               requestPosts(board.id, posts.page + 1, filters.searchQuery, filters.postStatusId)
           }
+
+          isLoggedIn={isLoggedIn}
+          authenticityToken={authenticityToken}
         />
       </div>
     );

app/javascript/components/Board/PostList.tsx

@@ -18,8 +18,11 @@ interface Props {
   areLoading: boolean;
   error: string;
 
-  handleLoadMore(): void;
   hasMore: boolean;
+  handleLoadMore(): void;
+
+  isLoggedIn: boolean;
+  authenticityToken: string;
 }
 
 const PostList = ({
@@ -27,8 +30,10 @@ const PostList = ({
   postStatuses,
   areLoading,
   error,
+  hasMore,
   handleLoadMore,
-  hasMore
+  isLoggedIn,
+  authenticityToken,
 }: Props) => (
   <div className="postList">
     { error ? <DangerText>{error}</DangerText> : null }
@@ -48,8 +53,13 @@ const PostList = ({
               title={post.title}
               description={post.description}
               postStatus={postStatuses.find(postStatus => postStatus.id === post.postStatusId)}
+              likesCount={post.likesCount}
+              liked={post.liked}
               commentsCount={post.commentsCount}
 
+              isLoggedIn={isLoggedIn}
+              authenticityToken={authenticityToken}
+
               key={i}
             />
           ))

app/javascript/components/Board/PostListItem.tsx

@@ -1,5 +1,6 @@
 import * as React from 'react';
 
+import LikeButton from '../../containers/LikeButton';
 import CommentsNumber from '../shared/CommentsNumber';
 import PostStatusLabel from '../shared/PostStatusLabel';
 import { DescriptionText } from '../shared/CustomTexts';
@@ -11,21 +12,46 @@ interface Props {
   title: string;
   description?: string;
   postStatus: IPostStatus;
+  likesCount: number;
+  liked: number;
   commentsCount: number;
+
+  isLoggedIn: boolean;
+  authenticityToken: string;
 }
 
-const PostListItem = ({ id, title, description, postStatus, commentsCount }: Props) => (
-  <a href={`/posts/${id}`} className="postLink">
-    <div className="postListItem">
-      <span className="postTitle">{title}</span>
-      <DescriptionText limit={120}>{description}</DescriptionText>
+const PostListItem = ({
+  id,
+  title,
+  description,
+  postStatus,
+  likesCount,
+  liked,
+  commentsCount,
 
-      <div className="postDetails">
-        <CommentsNumber number={commentsCount} />
-        { postStatus ? <PostStatusLabel {...postStatus} /> : null }
+  isLoggedIn,
+  authenticityToken,
+}: Props) => (
+  <React.Fragment>
+    <LikeButton
+      postId={id}
+      likesCount={likesCount}
+      liked={liked}
+      isLoggedIn={isLoggedIn}
+      authenticityToken={authenticityToken}
+    />
+    <a href={`/posts/${id}`} className="postLink">
+      <div className="postListItem">
+        <span className="postTitle">{title}</span>
+        <DescriptionText limit={120}>{description}</DescriptionText>
+
+        <div className="postDetails">
+          <CommentsNumber number={commentsCount} />
+          { postStatus ? <PostStatusLabel {...postStatus} /> : null }
+        </div>
       </div>
-    </div>
-  </a>
+    </a>
+  </React.Fragment>
 );
 
 export default PostListItem;

app/javascript/components/LikeButton/LikeButtonP.tsx

@@ -0,0 +1,37 @@
+import * as React from 'react';
+
+interface Props {
+  postId: number;
+  likesCount: number;
+  liked: number;
+  handleLikeSubmit(
+    postId: number,
+    isLike: boolean,
+    authenticityToken: string,
+  ): void;
+  authenticityToken: string;
+  isLoggedIn: boolean;
+}
+
+const LikeButtonP = ({
+  postId,
+  likesCount,
+  liked,
+  handleLikeSubmit,
+  authenticityToken,
+  isLoggedIn,
+}: Props) => (
+  <div className="likeButtonContainer">
+    <button onClick={() =>
+      isLoggedIn ?
+        handleLikeSubmit(postId, !liked, authenticityToken)
+        :
+        window.location.href = `/users/sign_in`
+    }>
+      { liked ? 'down' : 'up' }
+    </button>
+    <span className="likesCountLabel">{likesCount}</span>
+  </div>
+);
+
+export default LikeButtonP;

app/javascript/containers/LikeButton.tsx

@@ -0,0 +1,16 @@
+import { connect } from 'react-redux';
+
+import LikeButtonP from '../components/LikeButton/LikeButtonP';
+
+import { submitLike } from '../actions/submitLike';
+
+const mapDispatchToProps = dispatch => ({
+  handleLikeSubmit(postId: number, isLike: boolean, authenticityToken: string) {
+    dispatch(submitLike(postId, isLike, authenticityToken));
+  },
+});
+
+export default connect(
+  null,
+  mapDispatchToProps,
+)(LikeButtonP);

app/javascript/interfaces/IPost.ts

@@ -4,7 +4,10 @@ interface IPost {
   description?: string;
   boardId: number;
   postStatusId?: number;
+  likesCount: number;
+  liked: number;
   commentsCount: number;
+  hotness: number;
   userId: number;
   createdAt: string;
 }

app/javascript/interfaces/json/IPost.ts

@@ -4,7 +4,10 @@ interface IPostJSON {
   description?: string;
   board_id: number;
   post_status_id?: number;
+  likes_count: number;
+  liked: number;
   comments_count: number;
+  hotness: number;
   user_id: number;
   created_at: string;
 }

app/javascript/reducers/postReducer.ts

@@ -21,7 +21,10 @@ const initialState: IPost = {
   description: null,
   boardId: 0,
   postStatusId: null,
+  likesCount: 0,
+  liked: 0,
   commentsCount: 0,
+  hotness: 0,
   userId: 0,
   createdAt: '',
 };
@@ -41,7 +44,10 @@ const postReducer = (
         description: action.post.description,
         boardId: action.post.board_id,
         postStatusId: action.post.post_status_id,
+        likesCount: action.post.likes_count,
+        liked: action.post.liked,
         commentsCount: action.post.comments_count,
+        hotness: action.post.hotness,
         userId: action.post.user_id,
         createdAt: action.post.created_at,
       };

app/javascript/reducers/postsReducer.ts

@@ -22,6 +22,11 @@ import {
   SET_POST_STATUS_FILTER,
 } from '../actions/changeFilters';
 
+import {
+  LikeActionTypes,
+  LIKE_SUBMIT_SUCCESS,
+} from '../actions/submitLike';
+
 export interface PostsState {
   items: Array<IPost>;
   page: number;
@@ -42,7 +47,10 @@ const initialState: PostsState = {
 
 const postsReducer = (
   state = initialState,
-  action: PostsRequestActionTypes | ChangeFiltersActionTypes,
+  action:
+    PostsRequestActionTypes |
+    ChangeFiltersActionTypes |
+    LikeActionTypes,
 ): PostsState => {
   switch (action.type) {
     case POSTS_REQUEST_START:
@@ -78,6 +86,19 @@ const postsReducer = (
         filters: filtersReducer(state.filters, action),
       };
 
+    case LIKE_SUBMIT_SUCCESS:
+      return {
+        ...state,
+        items: state.items.map(post => {
+          if (action.postId === post.id) {
+            return action.isLike ?
+              { ...post, likesCount: post.likesCount + 1, liked: 1 }
+              :
+              { ...post, likesCount: post.likesCount - 1, liked: 0 }
+          } else return post;
+        }),
+      };
+
     default:
       return state;
   }