From 48c8d5d82b44759e3bf95f379f0ad169e876cedc Mon Sep 17 00:00:00 2001
From: Sergey Yarkov <serzh.yarkov@gmail.com>
Date: Sat, 29 Feb 2020 13:15:36 +0300
Subject: [PATCH]   added SSR

---
 backend/.tmp/data.db              | Bin 110592 -> 110592 bytes
 frontend/components/Articles.js   |   7 +-
 frontend/components/Layout.js     |  27 ++++++
 frontend/components/nav.js        |   5 +-
 frontend/next.config.js           |   6 +-
 frontend/package-lock.json        |  36 +++++++
 frontend/package.json             |   2 +
 frontend/pages/_app.js            |  39 --------
 frontend/pages/articles/[id].js   |  62 ++++++------
 frontend/pages/categories/[id].js |  37 ++++----
 frontend/pages/index.js           |  26 ++---
 frontend/utils/apollo.js          | 152 +++++++++++++++++++++++++++---
 package.json                      |   2 +-
 13 files changed, 285 insertions(+), 116 deletions(-)
 create mode 100644 frontend/components/Layout.js
 delete mode 100644 frontend/pages/_app.js

diff --git a/backend/.tmp/data.db b/backend/.tmp/data.db
index 5c35fa5c317481bd50999638e6e5866be44c6270..0a4b27a3f0c0f4ca9ff3ad0ca1701dae261bc92a 100644
GIT binary patch
delta 27
jcmZp8z}E19ZGtqT#6%fqMv2CRtqF{C*0W5Acr_mYh^q=w

delta 27
jcmZp8z}E19ZGtqT*hCp;MzO|(tqF{C*0b~~XN3U(hIt80

diff --git a/frontend/components/Articles.js b/frontend/components/Articles.js
index 9cdfc2b..41d6a74 100644
--- a/frontend/components/Articles.js
+++ b/frontend/components/Articles.js
@@ -1,21 +1,20 @@
-import Card from "./card";
+import Card from "./Card";
 
 const Articles = ({ articles }) => { 
-  console.log(articles) 
   const leftArticlesCount = Math.ceil(articles.length / 5);
   const leftArticles = articles.slice(0, leftArticlesCount);
   const rightArticles = articles.slice(leftArticlesCount, articles.length);
 
   return (
     <div>
-      <div className="uk-child-width-1-2" data-uk-grid>
+      <div className="uk-child-width-1-2 uk-grid" data-uk-grid>
         <div>
           {leftArticles.map((article, i) => {
             return <Card article={article} key={`article__${article.id}`} />;
           })}
         </div>
         <div>
-          <div className="uk-child-width-1-2@m uk-grid-match" data-uk-grid>
+          <div className="uk-child-width-1-2@m uk-grid-match uk-grid" data-uk-grid>
             {rightArticles.map((article, i) => {
               return <Card article={article} key={`article__${article.id}`} />;
             })}
diff --git a/frontend/components/Layout.js b/frontend/components/Layout.js
new file mode 100644
index 0000000..df359d1
--- /dev/null
+++ b/frontend/components/Layout.js
@@ -0,0 +1,27 @@
+import Head from 'next/head'
+import Nav from './Nav'
+
+const Layout = props => {
+    return(
+        <>
+        <Head>
+            <title>{props.titlePage}</title>
+            <link
+            rel="stylesheet"
+            href="https://fonts.googleapis.com/css?family=Staatliches"
+            />
+            <link
+            rel="stylesheet"
+            href="https://cdn.jsdelivr.net/npm/uikit@3.2.3/dist/css/uikit.min.css"
+            />
+            <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/js/uikit.min.js" />
+            <script src="https://cdn.jsdelivr.net/npm/uikit@3.2.3/dist/js/uikit-icons.min.js" />
+            <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/js/uikit.js" />
+        </Head>
+        <Nav />
+        {props.children}
+        </>
+    )
+}
+
+export default Layout
\ No newline at end of file
diff --git a/frontend/components/nav.js b/frontend/components/nav.js
index a72c55f..92ac5f2 100644
--- a/frontend/components/nav.js
+++ b/frontend/components/nav.js
@@ -1,6 +1,7 @@
 import Link from "next/link"  
-import Query from "../components/query";  
+import Query from "./query";  
 import CATEGORIES_QUERY from "../apollo/queries/category/categories.js";
+import { withApollo } from "../utils/apollo";
 
 const Nav = () => {  
   return (
@@ -9,7 +10,7 @@ const Nav = () => {
         {({ data: { categories } }) => {
           return (
             <div>
-              <nav className="uk-container uk-container-large uk-navbar-container" data-uk-navbar>
+              <nav className="uk-container uk-container-large uk-navbar-container uk-navbar" data-uk-navbar>
                 <div className="uk-navbar-left">
                   <ul className="uk-navbar-nav">
                     <li>
diff --git a/frontend/next.config.js b/frontend/next.config.js
index 988a2b8..630585d 100644
--- a/frontend/next.config.js
+++ b/frontend/next.config.js
@@ -1,9 +1,11 @@
 require("dotenv").config();  
 const withCSS = require('@zeit/next-css')
-const withFonts = require('next-fonts')
 
 module.exports = withCSS({
     env: {
         API_URL: process.env.API_URL
-    }
+    },
+    devIndicators: {
+        autoPrerender: false,
+    },
 })
\ No newline at end of file
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 0f297e0..7f500cb 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -82,6 +82,16 @@
         "tslib": "^1.10.0"
       }
     },
+    "@apollo/react-ssr": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/@apollo/react-ssr/-/react-ssr-3.1.3.tgz",
+      "integrity": "sha512-fUTmEYHxSTX1GA43B8vICxXXplpcEBnDwn0IgdAc3eG0p2YK97ZrJDRFCJ5vD7fyDZsrYhMf+rAI3sd+H2SS+A==",
+      "requires": {
+        "@apollo/react-common": "^3.1.3",
+        "@apollo/react-hooks": "^3.1.3",
+        "tslib": "^1.10.0"
+      }
+    },
     "@babel/code-frame": {
       "version": "7.8.3",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.8.3.tgz",
@@ -1434,6 +1444,22 @@
         "picomatch": "^2.0.4"
       }
     },
+    "apollo-boost": {
+      "version": "0.4.7",
+      "resolved": "https://registry.npmjs.org/apollo-boost/-/apollo-boost-0.4.7.tgz",
+      "integrity": "sha512-jfc3aqO0vpCV+W662EOG5gq4AH94yIsvSgAUuDvS3o/Z+8Joqn4zGC9CgLCDHusK30mFgtsEgwEe0pZoedohsQ==",
+      "requires": {
+        "apollo-cache": "^1.3.4",
+        "apollo-cache-inmemory": "^1.6.5",
+        "apollo-client": "^2.6.7",
+        "apollo-link": "^1.0.6",
+        "apollo-link-error": "^1.0.3",
+        "apollo-link-http": "^1.3.1",
+        "graphql-tag": "^2.4.2",
+        "ts-invariant": "^0.4.0",
+        "tslib": "^1.10.0"
+      }
+    },
     "apollo-cache": {
       "version": "1.3.4",
       "resolved": "https://registry.npmjs.org/apollo-cache/-/apollo-cache-1.3.4.tgz",
@@ -1481,6 +1507,16 @@
         "zen-observable-ts": "^0.8.20"
       }
     },
+    "apollo-link-error": {
+      "version": "1.1.12",
+      "resolved": "https://registry.npmjs.org/apollo-link-error/-/apollo-link-error-1.1.12.tgz",
+      "integrity": "sha512-psNmHyuy3valGikt/XHJfe0pKJnRX19tLLs6P6EHRxg+6q6JMXNVLYPaQBkL0FkwdTCB0cbFJAGRYCBviG8TDA==",
+      "requires": {
+        "apollo-link": "^1.2.13",
+        "apollo-link-http-common": "^0.2.15",
+        "tslib": "^1.9.3"
+      }
+    },
     "apollo-link-http": {
       "version": "1.5.16",
       "resolved": "https://registry.npmjs.org/apollo-link-http/-/apollo-link-http-1.5.16.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index d9cc47d..2f6ad67 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,7 +9,9 @@
   },
   "dependencies": {
     "@apollo/react-hooks": "^3.1.3",
+    "@apollo/react-ssr": "^3.1.3",
     "@zeit/next-css": "^1.0.1",
+    "apollo-boost": "^0.4.7",
     "apollo-cache-inmemory": "^1.6.5",
     "apollo-client": "^2.6.8",
     "apollo-link-http": "^1.5.16",
diff --git a/frontend/pages/_app.js b/frontend/pages/_app.js
deleted file mode 100644
index 3483e76..0000000
--- a/frontend/pages/_app.js
+++ /dev/null
@@ -1,39 +0,0 @@
-import Head from "next/head"; 
-import NProgress from 'nprogress'
-import Router from 'next/router'
-import "../assets/css/style.css";  
-import { ApolloProvider } from "@apollo/react-hooks";  
-import withData from "../utils/apollo";
-
-import Nav from '../components/nav'
-
-Router.events.on('routeChangeStart', url => NProgress.start())
-Router.events.on('routeChangeComplete', () => NProgress.done())
-Router.events.on('routeChangeError', () => NProgress.done())
-
-const App = ({ Component, pageProps, apollo }) => {  
-  return (
-    <ApolloProvider client={apollo}>
-      <Head>
-        <title>Strapi blog</title>
-        <meta name="viewport" content="initial-scale=1.0, width=device-width" />
-        <link
-          rel="stylesheet"
-          href="https://fonts.googleapis.com/css?family=Staatliches"
-        />
-        <link
-          rel="stylesheet"
-          href="https://cdn.jsdelivr.net/npm/uikit@3.2.3/dist/css/uikit.min.css"
-        />
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/js/uikit.min.js" />
-        <script src="https://cdn.jsdelivr.net/npm/uikit@3.2.3/dist/js/uikit-icons.min.js" />
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/js/uikit.js" />
-      </Head>
-      <Nav />
-      <Component {...pageProps} />
-    </ApolloProvider>
-  )
-};
-
-// Wraps all components in the tree with the data provider
-export default withData(App);
\ No newline at end of file
diff --git a/frontend/pages/articles/[id].js b/frontend/pages/articles/[id].js
index b84bcb6..ba98ab5 100644
--- a/frontend/pages/articles/[id].js
+++ b/frontend/pages/articles/[id].js
@@ -1,39 +1,45 @@
-import { useRouter } from "next/router";  
-import Query from "../../components/query";  
 import ReactMarkdown from "react-markdown";  
 import Moment from "react-moment";  
 import ARTICLE_QUERY from "../../apollo/queries/article/article";
+import { useRouter } from "next/router";    
+import { withApollo } from "../../utils/apollo";
+
+import Query from "../../components/query";
+import Layout from "../../components/Layout"
 
 const Article = () => {  
   const router = useRouter();
-  return (
-    <Query query={ARTICLE_QUERY} id={router.query.id}>
-      {({ data: { article } }) => {
-        return (
-          <div>
-            <div
-              id="banner"
-              className="uk-height-medium uk-flex uk-flex-center uk-flex-middle uk-background-cover uk-light uk-padding uk-margin"
-              data-src={process.env.API_URL + article.image.url}
-              data-srcset={process.env.API_URL + article.image.url}
-              data-uk-img
-            >
-              <h1>{article.title}</h1>
-            </div>
 
-            <div className="uk-section">
-              <div className="uk-container uk-container-small">
-                <ReactMarkdown source={article.content} />
-                <p>
-                  <Moment format="MMM Do YYYY">{article.published_at}</Moment>
-                </p>
+  return (
+      <Query query={ARTICLE_QUERY} id={router.query.id}>
+        {({ data: { article } }) => {
+          return (
+            <Layout titlePage={article.title}>
+              <div>
+                <div
+                  id="banner"
+                  className="uk-height-medium uk-flex uk-flex-center uk-flex-middle uk-background-cover uk-light uk-padding uk-margin"
+                  data-src={process.env.API_URL + article.image.url}
+                  data-srcset={process.env.API_URL + article.image.url}
+                  data-uk-img
+                >
+                  <h1>{article.title}</h1>
+                </div>
+
+                <div className="uk-section">
+                  <div className="uk-container uk-container-small">
+                    <ReactMarkdown source={article.content} />
+                    <p>
+                      <Moment format="MMM Do YYYY">{article.published_at}</Moment>
+                    </p>
+                  </div>
+                </div>
               </div>
-            </div>
-          </div>
-        );
-      }}
-    </Query>
+            </Layout>
+          );
+        }}
+      </Query>
   );
 };
 
-export default Article; 
\ No newline at end of file
+export default withApollo(Article); 
\ No newline at end of file
diff --git a/frontend/pages/categories/[id].js b/frontend/pages/categories/[id].js
index 6ebb84a..b063a12 100644
--- a/frontend/pages/categories/[id].js
+++ b/frontend/pages/categories/[id].js
@@ -1,27 +1,32 @@
-import { useRouter } from "next/router";  
-import Articles from "../../components/articles";  
-import Query from "../../components/query";  
 import CATEGORY_ARTICLES_QUERY from "../../apollo/queries/category/articles";
+import { useRouter } from "next/router";   
+import { withApollo } from "../../utils/apollo";
+
+import Articles from "../../components/articles";  
+import Query from "../../components/query"; 
+import Layout from "../../components/Layout"
 
 const Category = () => {  
   const router = useRouter();
 
   return (
-    <Query query={CATEGORY_ARTICLES_QUERY} id={router.query.id}>
-      {({ data: { category } }) => {
-        return (
-          <div>
-            <div className="uk-section">
-              <div className="uk-container uk-container-large">
-                <h1>{category.name}</h1>
-                <Articles articles={category.articles} />
+    <Layout titlePage="Categories">
+      <Query query={CATEGORY_ARTICLES_QUERY} id={router.query.id}>
+        {({ data: { category } }) => {
+          return (
+            <div>
+              <div className="uk-section">
+                <div className="uk-container uk-container-large">
+                  <h1>{category.name}</h1>
+                  <Articles articles={category.articles} />
+                </div>
               </div>
             </div>
-          </div>
-        );
-      }}
-    </Query>
+          );
+        }}
+      </Query>
+    </Layout>
   );
 };
 
-export default Category
\ No newline at end of file
+export default withApollo(Category)
\ No newline at end of file
diff --git a/frontend/pages/index.js b/frontend/pages/index.js
index 47aef58..8c8bb70 100644
--- a/frontend/pages/index.js
+++ b/frontend/pages/index.js
@@ -1,22 +1,26 @@
+import Layout from "../components/Layout"
 import Articles from "../components/articles";  
 import Query from "../components/query";  
 import ARTICLES_QUERY from "../apollo/queries/article/articles";
+import { withApollo } from '../utils/apollo';
 
 const Home = () => {  
   return (
-    <div>
-      <div className="uk-section">
-        <div className="uk-container uk-container-large">
-          <h1>Example Blog</h1>
-          <Query query={ARTICLES_QUERY}>
-            {({ data: { articles } }) => {
-              return <Articles articles={articles} />;
-            }}
-          </Query>
+    <Layout titlePage="Home page">
+      <div>
+        <div className="uk-section">
+          <div className="uk-container uk-container-large">
+            <h1>Example Blog</h1>
+            <Query query={ARTICLES_QUERY}>
+              {({ data: { articles } }) => {
+                return <Articles articles={articles} />;
+              }}
+            </Query>
+          </div>
         </div>
-      </div>
     </div>
+    </Layout>
   );
 };
 
-export default Home
+export default withApollo(Home)
diff --git a/frontend/utils/apollo.js b/frontend/utils/apollo.js
index 87da01b..bd6e1fa 100644
--- a/frontend/utils/apollo.js
+++ b/frontend/utils/apollo.js
@@ -1,22 +1,148 @@
-import { ApolloClient } from 'apollo-client'
-import { InMemoryCache } from 'apollo-cache-inmemory'
-import withApollo from 'next-with-apollo'
-import { createHttpLink } from 'apollo-link-http'
+import React, { useMemo } from 'react'
+import Head from 'next/head'
+import { ApolloProvider } from '@apollo/react-hooks'
+import { ApolloClient, InMemoryCache, HttpLink } from 'apollo-boost'
 import fetch from 'isomorphic-unfetch'
+import NProgress from 'nprogress'
+import "../assets/css/style.css"; 
+
+
+import Router from 'next/router'
+Router.events.on('routeChangeStart', url => NProgress.start())
+Router.events.on('routeChangeComplete', () => NProgress.done())
+Router.events.on('routeChangeError', () => NProgress.done())
 
 const GRAPHQL_URL = process.env.BACKEND_URL || 'http://localhost:1337/graphql'
 
-const link = new createHttpLink({
+const link = new HttpLink({
     fetch,
     uri: GRAPHQL_URL
 })
 
-export default withApollo(
 
-    ({initialState}) => 
-        new ApolloClient({
-            link,
-            cache: new InMemoryCache()
-                .restore(initialState || {})
-        })
-)
\ No newline at end of file
+
+
+  let apolloClient = null
+
+  /**
+   * Creates and provides the apolloContext
+   * to a next.js PageTree. Use it by wrapping
+   * your PageComponent via HOC pattern.
+   * @param {Function|Class} PageComponent
+   * @param {Object} [config]
+   * @param {Boolean} [config.ssr=true]
+   */
+  export function withApollo (PageComponent, { ssr = true } = {}) {
+    const WithApollo = ({ apolloClient, apolloState, ...pageProps }) => {
+      const client = useMemo(
+        () => apolloClient || initApolloClient(apolloState),
+        []
+      )
+      return (
+        <ApolloProvider client={client}>
+          <PageComponent {...pageProps} />
+        </ApolloProvider>
+      )
+    }
+  
+    // Set the correct displayName in development
+    if (process.env.NODE_ENV !== 'production') {
+      const displayName =
+        PageComponent.displayName || PageComponent.name || 'Component'
+  
+      if (displayName === 'App') {
+        console.warn('This withApollo HOC only works with PageComponents.')
+      }
+  
+      WithApollo.displayName = `withApollo(${displayName})`
+    }
+  
+    // Allow Next.js to remove getInitialProps from the browser build
+    if (typeof window === 'undefined') {
+      if (ssr) {
+        WithApollo.getInitialProps = async ctx => {
+          const { AppTree } = ctx
+  
+          let pageProps = {}
+          if (PageComponent.getInitialProps) {
+            pageProps = await PageComponent.getInitialProps(ctx)
+          }
+  
+          // Run all GraphQL queries in the component tree
+          // and extract the resulting data
+          const apolloClient = initApolloClient()
+  
+          try {
+            // Run all GraphQL queries
+            await require('@apollo/react-ssr').getDataFromTree(
+              <AppTree
+                pageProps={{
+                  ...pageProps,
+                  apolloClient
+                }}
+              />
+            )
+          } catch (error) {
+            // Prevent Apollo Client GraphQL errors from crashing SSR.
+            // Handle them in components via the data.error prop:
+            // https://www.apollographql.com/docs/react/api/react-apollo.html#graphql-query-data-error
+            console.error('Error while running `getDataFromTree`', error)
+          }
+  
+          // getDataFromTree does not call componentWillUnmount
+          // head side effect therefore need to be cleared manually
+          Head.rewind()
+  
+          // Extract query data from the Apollo store
+          const apolloState = apolloClient.cache.extract()
+  
+          return {
+            ...pageProps,
+            apolloState
+          }
+        }
+      }
+    }
+  
+    return WithApollo
+  }
+  
+  /**
+   * Always creates a new apollo client on the server
+   * Creates or reuses apollo client in the browser.
+   * @param  {Object} initialState
+   */
+  function initApolloClient (initialState) {
+    // Make sure to create a new client for every server-side request so that data
+    // isn't shared between connections (which would be bad)
+    if (typeof window === 'undefined') {
+      return createApolloClient(initialState)
+    }
+  
+    // Reuse client on the client-side
+    if (!apolloClient) {
+      apolloClient = createApolloClient(initialState)
+    }
+  
+    return apolloClient
+  }
+  
+  /**
+   * Creates and configures the ApolloClient
+   * @param  {Object} [initialState={}]
+   */
+  function createApolloClient (initialState = {}) {
+    // Check out https://github.com/zeit/next.js/pull/4611 if you want to use the AWSAppSyncClient
+    const isBrowser = typeof window !== 'undefined'
+    return new ApolloClient({
+      connectToDevTools: isBrowser,
+      ssrMode: !isBrowser, // Disables forceFetch on the server (so queries are only run once)
+      link: new HttpLink({
+        uri: GRAPHQL_URL, // Server URL (must be absolute)
+        credentials: 'same-origin', // Additional fetch() options like `credentials` or `headers`
+        // Use fetch() polyfill on the server
+        fetch: !isBrowser && fetch
+      }),
+      cache: new InMemoryCache().restore(initialState)
+    })
+  }
\ No newline at end of file
diff --git a/package.json b/package.json
index 82dc575..022d92f 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "postinstall": "cd backend && npm install && cd ../frontend && npm install",
-    "heroku-postbuild": "npm run --prefix ./frontend build",
+    "build": "npm run --prefix ./frontend build",
     "start": "concurrently \"npm run --prefix ./backend/ start\" \"npm run --prefix ./frontend/ start\"",
     "download": "concurrently \"npm run --prefix ./backend/ install\" \"npm run --prefix ./frontend/ install\"",
     "dev": "concurrently \"yarn --cwd ./backend/ develop\" \"yarn --cwd ./frontend/ dev\""