Projeto labook

MODULO 5/Labook/package.json

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+{
+  "name": "projeto-cookenu-backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node ./build/index.js",
+    "build": "tsc",
+    "dev": "ts-node-dev ./src/index.ts",
+    "migrations": "tsc && node ./build/database/migrations/Migrations.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/cors": "^2.8.12",
+    "@types/express": "^4.17.13",
+    "@types/jsonwebtoken": "^8.5.8",
+    "@types/knex": "^0.16.1",
+    "@types/node": "^18.0.6",
+    "@types/uuid": "^8.3.4",
+    "@types/bcryptjs": "^2.4.2",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^4.7.4"
+  },
+  "dependencies": {
+    "bcryptjs": "^2.4.3",
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.1",
+    "express": "^4.18.1",
+    "jsonwebtoken": "^8.5.1",
+    "knex": "^2.2.0",
+    "mysql": "^2.18.1",
+    "uuid": "^8.3.2"
+  }
+}

MODULO 5/Labook/requests.rest

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+### Endpoint de teste
+GET http://localhost:3003/ping
+
+### 1) Signup
+POST http://localhost:3003/users/signup
+Content-Type: application/json
+
+{
+    "name": "alice",
+    "email": "alice@gmail.com",
+    "password": "alice99"
+}
+
+### 2) Login
+POST http://localhost:3003/users/login
+Content-Type: application/json
+
+{
+    "email": "astrodev@gmail.com",
+    "password": "bananinha"
+}
+
+### 3) Create post
+POST http://localhost:3003/posts
+Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEwMSIsInJvbGUiOiJBRE1JTiIsImlhdCI6MTY2MDM5Mzk2MSwiZXhwIjoxNjYwNDgwMzYxfQ.FwOtXHKx1XXFnMot-CJstZPCzEORAtPrwd3iz8QAg5A
+Content-Type: application/json
+
+{
+    "content": "Hello world!"
+}
+
+### 4) Get posts
+GET http://localhost:3003/posts
+Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEwMSIsInJvbGUiOiJBRE1JTiIsImlhdCI6MTY2MDM5Mzk2MSwiZXhwIjoxNjYwNDgwMzYxfQ.FwOtXHKx1XXFnMot-CJstZPCzEORAtPrwd3iz8QAg5A
+
+### 5) Delete post
+DELETE http://localhost:3003/posts/92bc1f42-ce2c-4329-8420-72a368034320
+Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEwMSIsInJvbGUiOiJBRE1JTiIsImlhdCI6MTY2MDM5Mzk2MSwiZXhwIjoxNjYwNDgwMzYxfQ.FwOtXHKx1XXFnMot-CJstZPCzEORAtPrwd3iz8QAg5A
+
+### 6) Like post
+POST http://localhost:3003/posts/like/92bc1f42-ce2c-4329-8420-72a368034320
+Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEwMSIsInJvbGUiOiJBRE1JTiIsImlhdCI6MTY2MDM5Mzk2MSwiZXhwIjoxNjYwNDgwMzYxfQ.FwOtXHKx1XXFnMot-CJstZPCzEORAtPrwd3iz8QAg5A
+
+### 7) Remove Like from post
+DELETE http://localhost:3003/posts/like/92bc1f42-ce2c-4329-8420-72a368034320
+Authorization: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEwMSIsInJvbGUiOiJBRE1JTiIsImlhdCI6MTY2MDM5Mzk2MSwiZXhwIjoxNjYwNDgwMzYxfQ.FwOtXHKx1XXFnMot-CJstZPCzEORAtPrwd3iz8QAg5A

MODULO 5/Labook/src/business/PingBusiness.ts

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+export class PingBusiness {
+    public ping = async () => {
+        const response = {
+            message: "Pong!"
+        }
+
+        return response
+    }
+}

MODULO 5/Labook/src/business/PostBusiness.ts

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+import { PostDatabase } from "../database/PostDatabase"
+import { IAddLikeInputDTO, IAddLikeOutputDTO, ICreatePostInputDTO, ICreatePostOutputDTO, IDeletePostInputDTO, IDeletePostOutputDTO, IGetPostsInputDTO, IGetPostsOutputDTO, ILikeDB, IRemoveLikeInputDTO, IRemoveLikeOutputDTO, Post } from "../models/Post"
+import { USER_ROLES } from "../models/User"
+import { Authenticator } from "../services/Authenticator"
+import { HashManager } from "../services/HashManager"
+import { IdGenerator } from "../services/IdGenerator"
+
+export class PostBusiness {
+    constructor(
+        private postDatabase: PostDatabase,
+        private idGenerator: IdGenerator,
+        private hashManager: HashManager,
+        private authenticator: Authenticator
+    ) {}
+
+    public createPost = async (input: ICreatePostInputDTO) => {
+        const { token, content } = input
+
+        const payload = this.authenticator.getTokenPayload(token)
+
+        if (!payload) {
+            throw new Error("Não autenticado")
+        }
+
+        if (typeof content !== "string") {
+            throw new Error("Parâmetro 'content' inválido")
+        }
+
+        if (content.length < 1) {
+            throw new Error("Parâmetro 'content' inválido: mínimo de 1 caracteres")
+        }
+
+        const id = this.idGenerator.generate()
+
+        const post = new Post(
+            id,
+            content,
+            payload.id
+        )
+
+        await this.postDatabase.createPost(post)
+
+        const response: ICreatePostOutputDTO = {
+            message: "Post criado com sucesso",
+            post
+        }
+
+        return response
+    }
+
+    public getPosts = async (input: IGetPostsInputDTO) => {
+        const { token } = input
+
+        const payload = this.authenticator.getTokenPayload(token)
+
+        if (!payload) {
+            throw new Error("Não autenticado")
+        }
+
+        const postsDB = await this.postDatabase.getPosts()
+
+        const posts = postsDB.map(postDB => {
+            return new Post(
+                postDB.id,
+                postDB.content,
+                postDB.user_id
+            )
+        })
+
+        for (let post of posts) {
+            const postId = post.getId()
+            const likes = await this.postDatabase.getLikes(postId)
+            post.setLikes(likes)
+        }
+
+        const response: IGetPostsOutputDTO = {
+            posts
+        }
+
+        return response
+    }
+
+    public deletePost = async (input: IDeletePostInputDTO) => {
+        const { token, postId } = input
+
+        const payload = this.authenticator.getTokenPayload(token)
+
+        if (!payload) {
+            throw new Error("Não autenticado")
+        }
+
+        const postDB = await this.postDatabase.findPostById(postId)
+
+        if (!postDB) {
+            throw new Error("Post não encontrado")
+        }
+
+        if (payload.role === USER_ROLES.NORMAL) {
+            if (postDB.user_id !== payload.id) {
+                throw new Error("Sem autorização")
+            }
+        }
+
+        await this.postDatabase.deletePost(postId)
+
+        const response: IDeletePostOutputDTO = {
+            message: "Post deletado com sucesso"
+        }
+
+        return response
+    }
+
+    public addLike = async (input: IAddLikeInputDTO) => {
+        const { token, postId } = input
+
+        const payload = this.authenticator.getTokenPayload(token)
+
+        if (!payload) {
+            throw new Error("Não autenticado")
+        }
+
+        const postDB = await this.postDatabase.findPostById(postId)
+
+        if (!postDB) {
+            throw new Error("Post não encontrado")
+        }
+
+        const isAlreadyLiked = await this.postDatabase.findLike(
+            postId,
+            payload.id
+        )
+
+        if (isAlreadyLiked) {
+            throw new Error("Já deu like")
+        }
+
+        const likeDB: ILikeDB = {
+            id: this.idGenerator.generate(),
+            post_id: postId,
+            user_id: payload.id
+        }
+
+        await this.postDatabase.addLike(likeDB)
+
+        const response: IAddLikeOutputDTO = {
+            message: "Like realizado com sucesso"
+        }
+
+        return response
+    }
+
+    public removeLike = async (input: IRemoveLikeInputDTO) => {
+        const { token, postId } = input
+
+        const payload = this.authenticator.getTokenPayload(token)
+
+        if (!payload) {
+            throw new Error("Não autenticado")
+        }
+
+        const postDB = await this.postDatabase.findPostById(postId)
+
+        if (!postDB) {
+            throw new Error("Post não encontrado")
+        }
+
+        const isAlreadyLiked = await this.postDatabase.findLike(
+            postId,
+            payload.id
+        )
+
+        if (!isAlreadyLiked) {
+            throw new Error("Ainda não deu like")
+        }
+
+        await this.postDatabase.removeLike(postId, payload.id)
+
+        const response: IRemoveLikeOutputDTO = {
+            message: "Like removido com sucesso"
+        }
+
+        return response
+    }
+}