part 8a

Author: dhatGuy

part8/index.js

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+const { ApolloServer, gql } = require("apollo-server");
+
+let authors = [
+  {
+    name: "Robert Martin",
+    id: "afa51ab0-344d-11e9-a414-719c6709cf3e",
+    born: 1952,
+  },
+  {
+    name: "Martin Fowler",
+    id: "afa5b6f0-344d-11e9-a414-719c6709cf3e",
+    born: 1963,
+  },
+  {
+    name: "Fyodor Dostoevsky",
+    id: "afa5b6f1-344d-11e9-a414-719c6709cf3e",
+    born: 1821,
+  },
+  {
+    name: "Joshua Kerievsky", // birthyear not known
+    id: "afa5b6f2-344d-11e9-a414-719c6709cf3e",
+  },
+  {
+    name: "Sandi Metz", // birthyear not known
+    id: "afa5b6f3-344d-11e9-a414-719c6709cf3e",
+  },
+];
+
+/*
+ * Suomi:
+ * Saattaisi olla järkevämpää assosioida kirja ja sen tekijä tallettamalla kirjan yhteyteen tekijän nimen sijaan tekijän id
+ * Yksinkertaisuuden vuoksi tallennamme kuitenkin kirjan yhteyteen tekijän nimen
+ *
+ * English:
+ * It might make more sense to associate a book with its author by storing the author's id in the context of the book instead of the author's name
+ * However, for simplicity, we will store the author's name in connection with the book
+ */
+
+let books = [
+  {
+    title: "Clean Code",
+    published: 2008,
+    author: "Robert Martin",
+    id: "afa5b6f4-344d-11e9-a414-719c6709cf3e",
+    genres: ["refactoring"],
+  },
+  {
+    title: "Agile software development",
+    published: 2002,
+    author: "Robert Martin",
+    id: "afa5b6f5-344d-11e9-a414-719c6709cf3e",
+    genres: ["agile", "patterns", "design"],
+  },
+  {
+    title: "Refactoring, edition 2",
+    published: 2018,
+    author: "Martin Fowler",
+    id: "afa5de00-344d-11e9-a414-719c6709cf3e",
+    genres: ["refactoring"],
+  },
+  {
+    title: "Refactoring to patterns",
+    published: 2008,
+    author: "Joshua Kerievsky",
+    id: "afa5de01-344d-11e9-a414-719c6709cf3e",
+    genres: ["refactoring", "patterns"],
+  },
+  {
+    title: "Practical Object-Oriented Design, An Agile Primer Using Ruby",
+    published: 2012,
+    author: "Sandi Metz",
+    id: "afa5de02-344d-11e9-a414-719c6709cf3e",
+    genres: ["refactoring", "design"],
+  },
+  {
+    title: "Crime and punishment",
+    published: 1866,
+    author: "Fyodor Dostoevsky",
+    id: "afa5de03-344d-11e9-a414-719c6709cf3e",
+    genres: ["classic", "crime"],
+  },
+  {
+    title: "The Demon ",
+    published: 1872,
+    author: "Fyodor Dostoevsky",
+    id: "afa5de04-344d-11e9-a414-719c6709cf3e",
+    genres: ["classic", "revolution"],
+  },
+];
+
+const typeDefs = gql`
+  type Query {
+    bookCount: Int!
+    authorCount: Int!
+    allBooks(name: String, genre: String): [Book!]!
+    allAuthors: [Author!]!
+    addBook(input: addBookInput): Book
+  }
+
+  type Book {
+    id: ID!
+    title: String!
+    author: String!
+    published: Int!
+    genres: [String!]!
+  }
+
+  type Author {
+    id: ID!
+    born: Int
+    name: String!
+    bookCount: Int!
+  }
+
+  type Mutation {
+    addBook(input: addBookInput): Book!
+    editAuthor(input: editAuthorInput): Author
+  }
+
+  input editAuthorInput {
+    name: String!
+    setBornTo: Int!
+  }
+
+  input addBookInput {
+    title: String!
+    author: String!
+    published: Int!
+    genres: [String!]!
+  }
+`;
+
+const resolvers = {
+  Query: {
+    bookCount: (_, args) => books.length,
+    authorCount: (_, args) => authors.length,
+    allBooks: (_, { name, genre }) => {
+      let filteredBooks = books;
+      if (name) {
+        filteredBooks = filteredBooks.filter((book) => book.author === name);
+      }
+
+      if (genre) {
+        filteredBooks = filteredBooks.filter((book) =>
+          book.genres.includes(genre)
+        );
+      }
+      return filteredBooks;
+    },
+    allAuthors: () => authors,
+  },
+  Author: {
+    bookCount: (parent) => {
+      const count = books.filter((book) => book.author === parent.name);
+      return count.length;
+    },
+  },
+  Mutation: {
+    addBook: (_, { input }) => {
+      const authorIndex = authors.findIndex(
+        (author) => author.name === input.author
+      );
+      const newBook = {
+        id: Date.now(),
+        ...input,
+      };
+      if (authorIndex == -1) {
+        authors.push({ id: Date.now(), name: input.author });
+      }
+      books.push(newBook);
+      return newBook;
+    },
+    editAuthor: (_, { input }) => {
+      const { name, setBornTo } = input;
+      const index = authors.findIndex((author) => author.name === name);
+      if (index == -1) return null;
+      authors[index].born = setBornTo;
+      return authors[index];
+    },
+  },
+};
+
+const server = new ApolloServer({
+  typeDefs,
+  resolvers,
+});
+
+server.listen().then(({ url }) => {
+  console.log(`Server ready at ${url}`);
+});

part8/package.json

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+{
+  "name": "part8",
+  "version": "1.0.0",
+  "description": "Graphql",
+  "main": "index.js",
+  "license": "MIT",
+  "scripts": {
+    "dev": "nodemon index.js"
+  },
+  "dependencies": {
+    "apollo-server": "^3.5.0",
+    "apollo-server-core": "^3.5.0",
+    "graphql": "^16.2.0"
+  },
+  "devDependencies": {
+    "nodemon": "^2.0.15"
+  }
+}