Initial commit

server/.gitignore

@@ -0,0 +1,7 @@
+.env*
+dist
+package-lock.json
+node_modules
+.idea
+.vscode
+*.log

server/README.md

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+# hackernews-graphql-js
+
+This repository contains the final project for the [**GraphQL.js tutorial**](https://www.howtographql.com/graphql-js/0-introduction/) on [How to GraphQL](https://www.howtographql.com/). Note that it also serves as foundation for all frontend tutorials on the site.

server/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "hackernews-node",
+  "version": "1.0.0",
+  "license": "MIT",
+  "scripts": {
+    "start": "node src/index.js",
+    "dev": "nodemon src/index.js"
+  },
+  "dependencies": {
+    "@prisma/client": "^2.12.1",
+    "apollo-server": "^2.19.0",
+    "bcryptjs": "2.4.3",
+    "jsonwebtoken": "8.5.1"
+  },
+  "devDependencies": {
+    "@prisma/cli": "^2.12.1",
+    "nodemon": "^2.0.6"
+  }
+}

server/prisma/migrations/20201125185150-init/README.md

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+# Migration `20201125185150-init`
+
+This migration has been generated by Ryan Chenkie at 11/25/2020, 1:51:50 PM.
+You can check out the [state of the schema](./schema.prisma) after the migration.
+
+## Database Steps
+
+```sql
+CREATE TABLE "Link" (
+    "id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "description" TEXT NOT NULL,
+    "url" TEXT NOT NULL,
+    "postedById" INTEGER NOT NULL,
+
+    FOREIGN KEY ("postedById") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE
+)
+
+CREATE TABLE "User" (
+    "id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "name" TEXT NOT NULL,
+    "email" TEXT NOT NULL,
+    "password" TEXT NOT NULL
+)
+
+CREATE TABLE "Vote" (
+    "id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    "linkId" INTEGER NOT NULL,
+    "userId" INTEGER NOT NULL,
+
+    FOREIGN KEY ("linkId") REFERENCES "Link"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE
+)
+
+CREATE UNIQUE INDEX "User.email_unique" ON "User"("email")
+
+CREATE UNIQUE INDEX "Vote.linkId_userId_unique" ON "Vote"("linkId", "userId")
+```
+
+## Changes
+
+```diff
+diff --git schema.prisma schema.prisma
+migration ..20201125185150-init
+--- datamodel.dml
++++ datamodel.dml
+@@ -1,0 +1,37 @@
++datasource db {
++  provider = "sqlite" 
++  url = "***"
++}
++
++generator client {
++  provider = "prisma-client-js"
++}
++
++model Link {
++  id          Int      @id @default(autoincrement())
++  createdAt   DateTime @default(now())
++  description String
++  url         String
++  postedBy    User     @relation(fields: [postedById], references: [id])
++  postedById  Int
++  votes       Vote[]
++}
++
++model User {
++  id       Int    @id @default(autoincrement())
++  name     String
++  email    String @unique
++  password String
++  links    Link[]
++  votes    Vote[]
++}
++
++model Vote {
++  id     Int  @id @default(autoincrement())
++  link   Link @relation(fields: [linkId], references: [id])
++  linkId Int
++  user   User @relation(fields: [userId], references: [id])
++  userId Int
++
++  @@unique([linkId, userId])
++}
+```
+
+

server/prisma/migrations/20201125185150-init/schema.prisma

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+datasource db {
+  provider = "sqlite" 
+  url = "***"
+}
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+model Link {
+  id          Int      @id @default(autoincrement())
+  createdAt   DateTime @default(now())
+  description String
+  url         String
+  postedBy    User     @relation(fields: [postedById], references: [id])
+  postedById  Int
+  votes       Vote[]
+}
+
+model User {
+  id       Int    @id @default(autoincrement())
+  name     String
+  email    String @unique
+  password String
+  links    Link[]
+  votes    Vote[]
+}
+
+model Vote {
+  id     Int  @id @default(autoincrement())
+  link   Link @relation(fields: [linkId], references: [id])
+  linkId Int
+  user   User @relation(fields: [userId], references: [id])
+  userId Int
+
+  @@unique([linkId, userId])
+}

server/prisma/migrations/20201125185150-init/steps.json

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+{
+  "version": "0.3.14-fixed",
+  "steps": [
+    {
+      "tag": "CreateSource",
+      "source": "db"
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Source",
+        "source": "db"
+      },
+      "argument": "provider",
+      "value": "\"sqlite\""
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Source",
+        "source": "db"
+      },
+      "argument": "url",
+      "value": "\"***\""
+    },
+    {
+      "tag": "CreateModel",
+      "model": "Link"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "id",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "id"
+        },
+        "directive": "id"
+      }
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "id"
+        },
+        "directive": "default"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "id"
+        },
+        "directive": "default"
+      },
+      "argument": "",
+      "value": "autoincrement()"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "createdAt",
+      "type": "DateTime",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "createdAt"
+        },
+        "directive": "default"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "createdAt"
+        },
+        "directive": "default"
+      },
+      "argument": "",
+      "value": "now()"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "description",
+      "type": "String",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "url",
+      "type": "String",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "postedBy",
+      "type": "User",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "postedBy"
+        },
+        "directive": "relation"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "postedBy"
+        },
+        "directive": "relation"
+      },
+      "argument": "fields",
+      "value": "[postedById]"
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Link",
+          "field": "postedBy"
+        },
+        "directive": "relation"
+      },
+      "argument": "references",
+      "value": "[id]"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "postedById",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Link",
+      "field": "votes",
+      "type": "Vote",
+      "arity": "List"
+    },
+    {
+      "tag": "CreateModel",
+      "model": "User"
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "id",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "User",
+          "field": "id"
+        },
+        "directive": "id"
+      }
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "User",
+          "field": "id"
+        },
+        "directive": "default"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "User",
+          "field": "id"
+        },
+        "directive": "default"
+      },
+      "argument": "",
+      "value": "autoincrement()"
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "name",
+      "type": "String",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "email",
+      "type": "String",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "User",
+          "field": "email"
+        },
+        "directive": "unique"
+      }
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "password",
+      "type": "String",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "links",
+      "type": "Link",
+      "arity": "List"
+    },
+    {
+      "tag": "CreateField",
+      "model": "User",
+      "field": "votes",
+      "type": "Vote",
+      "arity": "List"
+    },
+    {
+      "tag": "CreateModel",
+      "model": "Vote"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Vote",
+      "field": "id",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "id"
+        },
+        "directive": "id"
+      }
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "id"
+        },
+        "directive": "default"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "id"
+        },
+        "directive": "default"
+      },
+      "argument": "",
+      "value": "autoincrement()"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Vote",
+      "field": "link",
+      "type": "Link",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "link"
+        },
+        "directive": "relation"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "link"
+        },
+        "directive": "relation"
+      },
+      "argument": "fields",
+      "value": "[linkId]"
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "link"
+        },
+        "directive": "relation"
+      },
+      "argument": "references",
+      "value": "[id]"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Vote",
+      "field": "linkId",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Vote",
+      "field": "user",
+      "type": "User",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "user"
+        },
+        "directive": "relation"
+      }
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "user"
+        },
+        "directive": "relation"
+      },
+      "argument": "fields",
+      "value": "[userId]"
+    },
+    {
+      "tag": "CreateArgument",
+      "location": {
+        "tag": "Directive",
+        "path": {
+          "tag": "Field",
+          "model": "Vote",
+          "field": "user"
+        },
+        "directive": "relation"
+      },
+      "argument": "references",
+      "value": "[id]"
+    },
+    {
+      "tag": "CreateField",
+      "model": "Vote",
+      "field": "userId",
+      "type": "Int",
+      "arity": "Required"
+    },
+    {
+      "tag": "CreateDirective",
+      "location": {
+        "path": {
+          "tag": "Model",
+          "model": "Vote",
+          "arguments": [
+            {
+              "name": "",
+              "value": "[linkId, userId]"
+            }
+          ]
+        },
+        "directive": "unique"
+      }
+    }
+  ]
+}

server/prisma/migrations/migrate.lock

@@ -0,0 +1,3 @@
+# Prisma Migrate lockfile v1
+
+20201125185150-init

server/prisma/schema.prisma

@@ -0,0 +1,37 @@
+datasource db {
+  provider = "sqlite" 
+  url      = "file:./dev.db"
+}
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+model Link {
+  id          Int      @id @default(autoincrement())
+  createdAt   DateTime @default(now())
+  description String
+  url         String
+  postedBy    User     @relation(fields: [postedById], references: [id])
+  postedById  Int
+  votes       Vote[]
+}
+
+model User {
+  id       Int    @id @default(autoincrement())
+  name     String
+  email    String @unique
+  password String
+  links    Link[]
+  votes    Vote[]
+}
+
+model Vote {
+  id     Int  @id @default(autoincrement())
+  link   Link @relation(fields: [linkId], references: [id])
+  linkId Int
+  user   User @relation(fields: [userId], references: [id])
+  userId Int
+
+  @@unique([linkId, userId])
+}

server/src/index.js

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+const { ApolloServer, PubSub } = require('apollo-server');
+const { PrismaClient } = require('@prisma/client');
+const Query = require('./resolvers/Query');
+const Mutation = require('./resolvers/Mutation');
+const Subscription = require('./resolvers/Subscription');
+const User = require('./resolvers/User');
+const Link = require('./resolvers/Link');
+const Vote = require('./resolvers/Vote');
+const fs = require('fs');
+const path = require('path');
+const { getUserId } = require('./utils');
+
+const pubsub = new PubSub();
+
+const prisma = new PrismaClient({
+  errorFormat: 'minimal'
+});
+
+const resolvers = {
+  Query,
+  Mutation,
+  Subscription,
+  User,
+  Link,
+  Vote
+};
+
+const server = new ApolloServer({
+  typeDefs: fs.readFileSync(
+    path.join(__dirname, 'schema.graphql'),
+    'utf8'
+  ),
+  resolvers,
+  context: ({ req }) => {
+    return {
+      ...req,
+      prisma,
+      pubsub,
+      userId:
+        req && req.headers.authorization
+          ? getUserId(req)
+          : null
+    };
+  },
+  subscriptions: {
+    onConnect: (connectionParams) => {
+      if (connectionParams.authToken) {
+        return {
+          prisma,
+          userId: getUserId(
+            null,
+            connectionParams.authToken
+          )
+        };
+      } else {
+        return {
+          prisma
+        };
+      }
+    }
+  }
+});
+
+server
+  .listen()
+  .then(({ url }) =>
+    console.log(`Server is running on ${url}`)
+  );

server/src/resolvers/Link.js

@@ -0,0 +1,16 @@
+function postedBy(parent, args, context) {
+  return context.prisma.link
+    .findUnique({ where: { id: parent.id } })
+    .postedBy();
+}
+
+function votes(parent, args, context) {
+  return context.prisma.link
+    .findUnique({ where: { id: parent.id } })
+    .votes();
+}
+
+module.exports = {
+  postedBy,
+  votes
+};

server/src/resolvers/Mutation.js

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+const bcrypt = require('bcryptjs');
+const jwt = require('jsonwebtoken');
+const { APP_SECRET } = require('../utils');
+
+async function post(parent, args, context, info) {
+  const { userId } = context;
+
+  const newLink = await context.prisma.link.create({
+    data: {
+      url: args.url,
+      description: args.description,
+      postedBy: { connect: { id: userId } }
+    }
+  });
+  context.pubsub.publish('NEW_LINK', newLink);
+
+  return newLink;
+}
+
+async function signup(parent, args, context, info) {
+  const password = await bcrypt.hash(args.password, 10);
+  const user = await context.prisma.user.create({
+    data: { ...args, password }
+  });
+
+  const token = jwt.sign({ userId: user.id }, APP_SECRET);
+
+  return {
+    token,
+    user
+  };
+}
+
+async function login(parent, args, context, info) {
+  const user = await context.prisma.user.findUnique({
+    where: { email: args.email }
+  });
+  if (!user) {
+    throw new Error('No such user found');
+  }
+
+  const valid = await bcrypt.compare(
+    args.password,
+    user.password
+  );
+  if (!valid) {
+    throw new Error('Invalid password');
+  }
+
+  const token = jwt.sign({ userId: user.id }, APP_SECRET);
+
+  return {
+    token,
+    user
+  };
+}
+
+async function vote(parent, args, context, info) {
+  const { userId } = context;
+  const vote = await context.prisma.vote.findUnique({
+    where: {
+      linkId_userId: {
+        linkId: Number(args.linkId),
+        userId: userId
+      }
+    }
+  });
+
+  if (Boolean(vote)) {
+    throw new Error(
+      `Already voted for link: ${args.linkId}`
+    );
+  }
+
+  const newVote = context.prisma.vote.create({
+    data: {
+      user: { connect: { id: userId } },
+      link: { connect: { id: Number(args.linkId) } }
+    }
+  });
+  context.pubsub.publish('NEW_VOTE', newVote);
+
+  return newVote;
+}
+
+module.exports = {
+  post,
+  signup,
+  login,
+  vote
+};

server/src/resolvers/Query.js

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+async function feed(parent, args, context, info) {
+  const where = args.filter
+    ? {
+        OR: [
+          { description: { contains: args.filter } },
+          { url: { contains: args.filter } }
+        ]
+      }
+    : {};
+
+  const links = await context.prisma.link.findMany({
+    where,
+    skip: args.skip,
+    take: args.take,
+    orderBy: args.orderBy
+  });
+
+  const count = await context.prisma.link.count({ where });
+
+  return {
+    id: 'main-feed',
+    links,
+    count
+  };
+}
+
+module.exports = {
+  feed
+};

server/src/resolvers/Subscription.js

@@ -0,0 +1,26 @@
+function newLinkSubscribe(parent, args, context, info) {
+  return context.pubsub.asyncIterator("NEW_LINK")
+}
+
+const newLink = {
+  subscribe: newLinkSubscribe,
+  resolve: payload => {
+    return payload
+  },
+}
+
+function newVoteSubscribe(parent, args, context, info) {
+  return context.pubsub.asyncIterator("NEW_VOTE")
+}
+
+const newVote = {
+  subscribe: newVoteSubscribe,
+  resolve: payload => {
+    return payload
+  },
+}
+
+module.exports = {
+  newLink,
+  newVote
+}

server/src/resolvers/User.js

@@ -0,0 +1,9 @@
+function links(parent, args, context) {
+  return context.prisma.user
+    .findUnique({ where: { id: parent.id } })
+    .links();
+}
+
+module.exports = {
+  links
+};

server/src/resolvers/Vote.js

@@ -0,0 +1,16 @@
+function link(parent, args, context) {
+  return context.prisma.vote
+    .findUnique({ where: { id: parent.id } })
+    .link();
+}
+
+function user(parent, args, context) {
+  return context.prisma.vote
+    .findUnique({ where: { id: parent.id } })
+    .user();
+}
+
+module.exports = {
+  link,
+  user
+};

server/src/schema.graphql

@@ -0,0 +1,71 @@
+type Query {
+  info: String!
+  feed(
+    filter: String
+    skip: Int
+    take: Int
+    orderBy: LinkOrderByInput
+  ): Feed!
+}
+
+type Feed {
+  id: ID!
+  links: [Link!]!
+  count: Int!
+}
+
+type Mutation {
+  post(url: String!, description: String!): Link!
+  signup(
+    email: String!
+    password: String!
+    name: String!
+  ): AuthPayload
+  login(email: String!, password: String!): AuthPayload
+  vote(linkId: ID!): Vote
+}
+
+type Subscription {
+  newLink: Link
+  newVote: Vote
+}
+
+type AuthPayload {
+  token: String
+  user: User
+}
+
+type User {
+  id: ID!
+  name: String!
+  email: String!
+  links: [Link!]!
+}
+
+type Link {
+  id: ID!
+  description: String!
+  url: String!
+  postedBy: User
+  votes: [Vote!]!
+  createdAt: DateTime!
+}
+
+type Vote {
+  id: ID!
+  link: Link!
+  user: User!
+}
+
+input LinkOrderByInput {
+  description: Sort
+  url: Sort
+  createdAt: Sort
+}
+
+enum Sort {
+  asc
+  desc
+}
+
+scalar DateTime

server/src/utils.js

@@ -0,0 +1,30 @@
+const jwt = require('jsonwebtoken');
+const APP_SECRET = 'GraphQL-is-aw3some';
+
+function getTokenPayload(token) {
+  return jwt.verify(token, APP_SECRET);
+}
+
+function getUserId(req, authToken) {
+  if (req) {
+    const authHeader = req.headers.authorization;
+    if (authHeader) {
+      const token = authHeader.replace('Bearer ', '');
+      if (!token) {
+        throw new Error('No token found');
+      }
+      const { userId } = getTokenPayload(token);
+      return userId;
+    }
+  } else if (authToken) {
+    const { userId } = getTokenPayload(authToken);
+    return userId;
+  }
+
+  throw new Error('Not authenticated');
+}
+
+module.exports = {
+  APP_SECRET,
+  getUserId
+};