Add example prepr cms (#22776)

Added preview example with Prepr CMS.

Working demo at https://next-blog-prepr.vercel.app/

examples/cms-prepr/.env.local.example

+PREPRIO_API=https://graphql.prepr.io/graphql
+PREPRIO_PRODUCTION_TOKEN=
+PREPRIO_PREVIEW_TOKEN=
+PREPRIO_PREVIEW_KEY=
\ No newline at end of file

examples/cms-prepr/.gitignore

+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# vercel
+.vercel

examples/cms-prepr/README.md

+# A statically generated blog example using Next.js and Prepr
+
+This example showcases Next.js's [Static Generation](https://nextjs.org/docs/basic-features/pages) feature using [Prepr](https://prepr.io/) as the data source.
+
+## Demo
+
+- **Live**: [https://next-blog-prepr.now.sh/](https://next-blog-prepr.now.sh/)
+- **Preview Mode**: [https://next-blog-prepr.now.sh/api/preview...](https://next-blog-prepr.now.sh/api/preview?secret=237864ihasdhj283768&slug=discover-enjoy-amsterdam)
+
+### [https://next-blog-prepr.now.sh/](https://next-blog-prepr.now.sh/)
+
+### Related examples
+
+- [WordPress](/examples/cms-wordpress)
+- [DatoCMS](/examples/cms-datocms)
+- [Sanity](/examples/cms-sanity)
+- [TakeShape](/examples/cms-takeshape)
+- [Prismic](/examples/cms-prismic)
+- [Contentful](/examples/cms-contentful)
+- [Strapi](/examples/cms-strapi)
+- [Agility CMS](/examples/cms-agilitycms)
+- [Cosmic](/examples/cms-cosmic)
+- [ButterCMS](/examples/cms-buttercms)
+- [Storyblok](/examples/cms-storyblok)
+- [Kontent](/examples/cms-kontent)
+- [Ghost](/examples/cms-ghost)
+- [GraphCMS](/examples/cms-graphcms)
+- [Blog Starter](/examples/blog-starter)
+
+## Getting Started
+
+Once you have access to [the environment variables you'll need](#step-3-set-up-environment-variables), deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example):
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/cms-prepr&project-name=cms-prepr&repository-name=cms-prepr&env=PREPRIO_API,PREPRIO_PRODUCTION_TOKEN,PREPRIO_PREVIEW_TOKEN,PREPRIO_PREVIEW_KEY&envDescription=Required%20to%20connect%20the%20app%20with%20Prepr&envLink=https://vercel.link/cms-prepr-env)
+
+## How to use
+
+Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:
+
+```bash
+npx create-next-app --example cms-prepr cms-prepr-app
+# or
+yarn create next-app --example cms-prepr cms-prepr-app
+```
+
+## Configuration
+
+### Step 1. Create an account and a environment in Prepr
+
+First, [create an account in Prepr](https://prepr.io).
+
+### Step 2. Create Author model
+
+From your Prepr dashboard, click **Settings** -> **Models**
+
+Click on the arrow next to **Add model** and select **Import**.
+
+Import the [`models/author.json`](models/author.json) file.
+
+After that
+
+Import the [`models/post.json`](models/post.json) file.
+
+Click on the Author field and select `Author` at the option `Publication model` and click **Save**.
+
+### Step 3. Set up environment variables
+
+Copy the `.env.local.example` file in this directory to `.env.local` (which will be ignored by Git):
+
+```bash
+cp .env.local.example .env.local
+```
+
+Inside your environment, navigate to **Settings > Development > Access Tokens**.
+
+Click **Add access token**, enter the name `Next.js Preview` and add the scope `graphql_preview` and click **Save**.
+
+Copy the generated access token and set the variable `PREPRIO_PREVIEW_TOKEN` in `.env.local`.
+
+Go back to the Access token overview and click **Add access token**.
+
+Enter the name `Next.js Production` and add the scope `graphql_published` and click **Save**.
+
+Copy the generated access token and set the variable `PREPRIO_PRODUCTION_TOKEN` in `.env.local`.
+
+The `PREPRIO_PREVIEW_KEY` can be any random string (but avoid spaces), like a UUID`, this is used
+for [Preview Mode](https://nextjs.org/docs/advanced-features/preview-mode).
+
+### Step 4. Run Next.js in development mode
+
+```bash
+npm install
+npm run dev
+
+# or
+
+yarn install
+yarn dev
+```
+
+Your blog should be up and running on [http://localhost:3000](http://localhost:3000)! If it doesn't work, post on [GitHub discussions](https://github.com/vercel/next.js/discussions).
+
+### Step 5. Try preview mode
+
+In Prepr, go to one of the posts in your environment and:
+
+- **Update the title**. For example, you can add `[REVIEW]` in front of the title.
+- After you edit the publication save the post with a review state.
+
+To view the preview, transform the url to the following format: `http://localhost:3000/api/preview?secret=<YOUR_SECRET_TOKEN>&slug=<SLUG_TO_PREVIEW>` where `<YOUR_SECRET_TOKEN>` is
+the same secret you defined in the `.env.local` file and `<SLUG_TO_PREVIEW>` is the slug of one of the posts you want to preview.
+
+You should now be able to see post that are in Review and Done state. To exit the preview mode, you can click on _"Click here to exit preview mode"_ at the top.
+
+### Step 6. Deploy on Vercel
+
+You can deploy this app to the cloud with [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=next-example) ([Documentation](https://nextjs.org/docs/deployment)).
+
+#### Deploy Your Local Project
+
+To deploy your local project to Vercel, push it to GitHub/GitLab/Bitbucket and [import to Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=next-example).
+
+**Important**: When you import your project on Vercel, make sure to click on **Environment Variables** and set them to match your `.env.local` file.
+
+#### Deploy from Our Template
+
+Alternatively, you can deploy using our template by clicking on the Deploy button below.
+
+[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/git/external?repository-url=https://github.com/vercel/next.js/tree/canary/examples/cms-prepr&project-name=cms-prepr&repository-name=cms-prepr&env=PREPRIO_API,PREPRIO_PRODUCTION_TOKEN,PREPRIO_PREVIEW_TOKEN,PREPRIO_PREVIEW_KEY&envDescription=Required%20to%20connect%20the%20app%20with%20Prepr&envLink=https://vercel.link/cms-prepr-env)

examples/cms-prepr/components/alert.js

+import Container from './container'
+import cn from 'classnames'
+import { EXAMPLE_PATH } from '../lib/constants'
+
+export default function Alert({ preview }) {
+  return (
+    <div
+      className={cn('border-b', {
+        'bg-accent-7 border-accent-7 text-white': preview,
+        'bg-accent-1 border-accent-2': !preview,
+      })}
+    >
+      <Container>
+        <div className="py-2 text-center text-sm">
+          {preview ? (
+            <>
+              This page is a preview.{' '}
+              <a
+                href="/api/exit-preview"
+                className="underline hover:text-cyan duration-200 transition-colors"
+              >
+                Click here
+              </a>{' '}
+              to exit preview mode.
+            </>
+          ) : (
+            <>
+              The source code for this blog is{' '}
+              <a
+                href={`https://github.com/vercel/next.js/tree/canary/examples/${EXAMPLE_PATH}`}
+                className="underline hover:text-success duration-200 transition-colors"
+              >
+                available on GitHub
+              </a>
+              .
+            </>
+          )}
+        </div>
+      </Container>
+    </div>
+  )
+}

examples/cms-prepr/components/avatar.js

+import Image from 'next/image'
+
+export default function Avatar({ name, picture }) {
+  return (
+    <div className="flex items-center">
+      <div className="w-12 h-12 relative mr-4">
+        <Image
+          src={picture}
+          layout="fill"
+          className="rounded-full"
+          alt={name}
+        />
+      </div>
+      <div className="text-xl font-bold">{name}</div>
+    </div>
+  )
+}

examples/cms-prepr/components/container.js

+export default function Container({ children }) {
+  return <div className="container mx-auto px-5">{children}</div>
+}

examples/cms-prepr/components/cover-image.js

+import Image from 'next/image'
+import Link from 'next/link'
+import cn from 'classnames'
+
+export default function CoverImage({ title, url, slug }) {
+  const image = (
+    <Image
+      width={2000}
+      height={1000}
+      alt={`Cover Image for ${title}`}
+      className={cn('shadow-small', {
+        'hover:shadow-medium transition-shadow duration-200': slug,
+      })}
+      src={url}
+    />
+  )
+
+  return (
+    <div className="sm:mx-0">
+      {slug ? (
+        <Link as={`/posts/${slug}`} href="/posts/[slug]">
+          <a aria-label={title}>{image}</a>
+        </Link>
+      ) : (
+        image
+      )}
+    </div>
+  )
+}

examples/cms-prepr/components/date.js

+import { parseISO, format } from 'date-fns'
+
+export default function Date({ dateString }) {
+  const date = parseISO(dateString)
+  return <time dateTime={dateString}>{format(date, 'LLLL	d, yyyy')}</time>
+}

examples/cms-prepr/components/footer.js

+import Container from './container'
+import { EXAMPLE_PATH } from '../lib/constants'
+
+export default function Footer() {
+  return (
+    <footer className="bg-accent-1 border-t border-accent-2">
+      <Container>
+        <div className="py-28 flex flex-col lg:flex-row items-center">
+          <h3 className="text-4xl lg:text-5xl font-bold tracking-tighter leading-tight text-center lg:text-left mb-10 lg:mb-0 lg:pr-4 lg:w-1/2">
+            Statically Generated with Next.js.
+          </h3>
+          <div className="flex flex-col lg:flex-row justify-center items-center lg:pl-4 lg:w-1/2">
+            <a
+              href="https://nextjs.org/docs/basic-features/pages"
+              className="mx-3 bg-black hover:bg-white hover:text-black border border-black text-white font-bold py-3 px-12 lg:px-8 duration-200 transition-colors mb-6 lg:mb-0"
+            >
+              Read Documentation
+            </a>
+            <a
+              href={`https://github.com/vercel/next.js/tree/canary/examples/${EXAMPLE_PATH}`}
+              className="mx-3 font-bold hover:underline"
+            >
+              View on GitHub
+            </a>
+          </div>
+        </div>
+      </Container>
+    </footer>
+  )
+}

examples/cms-prepr/components/header.js

+import Link from 'next/link'
+
+export default function Header() {
+  return (
+    <h2 className="text-2xl md:text-4xl font-bold tracking-tight md:tracking-tighter leading-tight mb-20 mt-8">
+      <Link href="/">
+        <a className="hover:underline">Blog</a>
+      </Link>
+      .
+    </h2>
+  )
+}

examples/cms-prepr/components/hero-post.js

+import Avatar from '../components/avatar'
+import Date from '../components/date'
+import CoverImage from '../components/cover-image'
+import Link from 'next/link'
+
+export default function HeroPost({
+  title,
+  coverImage,
+  date,
+  excerpt,
+  author,
+  slug,
+}) {
+  return (
+    <section>
+      <div className="mb-8 md:mb-16">
+        <CoverImage slug={slug} title={title} url={coverImage} />
+      </div>
+      <div className="mb-20 md:grid md:grid-cols-2 md:col-gap-16 lg:col-gap-8 md:mb-28">
+        <div>
+          <h3 className="mb-4 text-4xl leading-tight lg:text-6xl">
+            <Link as={`/posts/${slug}`} href="/posts/[slug]">
+              <a className="hover:underline">{title}</a>
+            </Link>
+          </h3>
+          <div className="mb-4 text-lg md:mb-0">
+            <Date dateString={date} />
+          </div>
+        </div>
+        <div>
+          <p className="mb-4 text-lg leading-relaxed">{excerpt}</p>
+          <Avatar
+            name={author.name}
+            picture={author.cover[0].cdn_files[0].url}
+          />
+        </div>
+      </div>
+    </section>
+  )
+}

examples/cms-prepr/components/intro.js

+import { CMS_NAME, CMS_URL } from '../lib/constants'
+
+export default function Intro() {
+  return (
+    <section className="flex-col md:flex-row flex items-center md:justify-between mt-16 mb-16 md:mb-12">
+      <h1 className="text-6xl md:text-8xl font-bold tracking-tighter leading-tight md:pr-8">
+        Blog.
+      </h1>
+      <h4 className="text-center md:text-left text-lg mt-5 md:pl-8">
+        A statically generated blog example using{' '}
+        <a
+          href="https://nextjs.org/"
+          className="underline hover:text-success duration-200 transition-colors"
+        >
+          Next.js
+        </a>{' '}
+        and{' '}
+        <a
+          href={CMS_URL}
+          className="underline hover:text-success duration-200 transition-colors"
+        >
+          {CMS_NAME}
+        </a>
+        .
+      </h4>
+    </section>
+  )
+}

examples/cms-prepr/components/layout.js

+import Alert from '../components/alert'
+import Footer from '../components/footer'
+import Meta from '../components/meta'
+
+export default function Layout({ preview, children }) {
+  return (
+    <>
+      <Meta />
+      <div className="min-h-screen">
+        <Alert preview={preview} />
+        <main>{children}</main>
+      </div>
+      <Footer />
+    </>
+  )
+}

examples/cms-prepr/components/meta.js

+import Head from 'next/head'
+import { CMS_NAME, HOME_OG_IMAGE_URL } from '../lib/constants'
+
+export default function Meta() {
+  return (
+    <Head>
+      <link
+        rel="apple-touch-icon"
+        sizes="180x180"
+        href="/favicon/apple-touch-icon.png"
+      />
+      <link
+        rel="icon"
+        type="image/png"
+        sizes="32x32"
+        href="/favicon/favicon-32x32.png"
+      />
+      <link
+        rel="icon"
+        type="image/png"
+        sizes="16x16"
+        href="/favicon/favicon-16x16.png"
+      />
+      <link rel="manifest" href="/favicon/site.webmanifest" />
+      <link
+        rel="mask-icon"
+        href="/favicon/safari-pinned-tab.svg"
+        color="#000000"
+      />
+      <link rel="shortcut icon" href="/favicon/favicon.ico" />
+      <meta name="msapplication-TileColor" content="#000000" />
+      <meta name="msapplication-config" content="/favicon/browserconfig.xml" />
+      <meta name="theme-color" content="#000" />
+      <link rel="alternate" type="application/rss+xml" href="/feed.xml" />
+      <meta
+        name="description"
+        content={`A statically generated blog example using Next.js and ${CMS_NAME}.`}
+      />
+      <meta property="og:image" content={HOME_OG_IMAGE_URL} />
+    </Head>
+  )
+}

examples/cms-prepr/components/more-stories.js

+import PostPreview from '../components/post-preview'
+
+export default function MoreStories({ posts }) {
+  return (
+    <section>
+      <h2 className="mb-8 text-6xl md:text-7xl font-bold tracking-tighter leading-tight">
+        More Stories
+      </h2>
+      <div className="grid grid-cols-1 md:grid-cols-2 md:gap-x-16 lg:gap-x-32 gap-y-20 md:gap-y-32 mb-32">
+        {posts.map((post) => (
+          <PostPreview
+            key={post._slug}
+            title={post.title}
+            coverImage={post.cover[0].cdn_files[0].url}
+            date={post.date}
+            author={post.author[0]}
+            slug={post._slug}
+            excerpt={post.summary}
+          />
+        ))}
+      </div>
+    </section>
+  )
+}

examples/cms-prepr/components/post-body.js

+import postStyles from './post-styles.module.css'
+
+export default function PostBody({ content }) {
+  return (
+    <div
+      className={`max-w-2xl mx-auto post ${postStyles.post}`}
+      dangerouslySetInnerHTML={{ __html: content }}
+    />
+  )
+}

examples/cms-prepr/components/post-header.js

+import Avatar from '../components/avatar'
+import Date from '../components/date'
+import CoverImage from '../components/cover-image'
+import PostTitle from '../components/post-title'
+
+export default function PostHeader({ title, coverImage, date, author }) {
+  return (
+    <>
+      <PostTitle>{title}</PostTitle>
+      <div className="hidden md:block md:mb-12">
+        <Avatar name={author.name} picture={author.cover[0].cdn_files[0].url} />
+      </div>
+      <div className="mb-8 -mx-5 md:mb-16 sm:mx-0">
+        <CoverImage title={title} url={coverImage} />
+      </div>
+      <div className="max-w-2xl mx-auto">
+        <div className="block mb-6 md:hidden">
+          <Avatar
+            name={author.name}
+            picture={author.cover[0].cdn_files[0].url}
+          />
+        </div>
+        <div className="mb-6 text-lg">
+          <Date dateString={date} />
+        </div>
+      </div>
+    </>
+  )
+}

examples/cms-prepr/components/post-preview.js

+import Avatar from '../components/avatar'
+import Date from '../components/date'
+import CoverImage from './cover-image'
+import Link from 'next/link'
+
+export default function PostPreview({
+  title,
+  coverImage,
+  date,
+  excerpt,
+  author,
+  slug,
+}) {
+  return (
+    <div>
+      <div className="mb-5">
+        <CoverImage slug={slug} title={title} url={coverImage} />
+      </div>
+      <h3 className="mb-3 text-3xl leading-snug">
+        <Link as={`/posts/${slug}`} href="/posts/[slug]">
+          <a className="hover:underline">{title}</a>
+        </Link>
+      </h3>
+      <div className="mb-4 text-lg">
+        <Date dateString={date} />
+      </div>
+      <p className="mb-4 text-lg leading-relaxed">{excerpt}</p>
+      <Avatar name={author.name} picture={author.cover[0].cdn_files[0].url} />
+    </div>
+  )
+}

examples/cms-prepr/components/post-styles.module.css

+.post {
+  @apply text-lg leading-relaxed;
+}
+
+.post p,
+.post ul,
+.post ol,
+.post blockquote {
+  @apply my-6;
+}
+
+.post h1 {
+  @apply mt-12 mb-4 text-4xl leading-snug;
+}
+
+.post h2 {
+  @apply mt-12 mb-4 text-3xl leading-snug;
+}
+
+.post h3 {
+  @apply mt-8 mb-4 text-2xl leading-snug;
+}

examples/cms-prepr/components/post-title.js

+export default function PostTitle({ children }) {
+  return (
+    <h1 className="text-6xl md:text-7xl lg:text-8xl font-bold tracking-tighter leading-tight md:leading-none mb-12 text-center md:text-left">
+      {children}
+    </h1>
+  )
+}

examples/cms-prepr/components/section-separator.js

+export default function SectionSeparator() {
+  return <hr className="border-accent-2 mt-28 mb-24" />
+}

examples/cms-prepr/jsconfig.json

+{
+  "compilerOptions": {
+    "baseUrl": "."
+  }
+}

examples/cms-prepr/lib/constants.js

+export const EXAMPLE_PATH = 'cms-prepr'
+export const CMS_NAME = 'Prepr'
+export const CMS_URL = 'https://prepr.io/'
+export const HOME_OG_IMAGE_URL = ''

examples/cms-prepr/lib/preprio.js

+import { createPreprClient } from '@preprio/nodejs-sdk'
+
+const prepr = createPreprClient({
+  token: process.env.PREPRIO_PRODUCTION_TOKEN,
+  timeout: 4000,
+  baseUrl: process.env.PREPRIO_API,
+})
+
+export { prepr }
+
+export async function getAllPostsForHome(preview) {
+  // Query publications
+  const data =
+    (await prepr
+      .graphqlQuery(
+        `
+      query {
+        Posts {
+          items {
+            _id,
+            _slug,
+            date: _publish_on
+            title,
+            summary,
+            author {
+                name
+                cover {
+                    cdn_files {
+                        url(width: 100, height:100)
+                    }
+                }
+            }
+            cover {
+                cdn_files {
+                    url(width:2000, height:1000)
+                }
+            }
+          }
+        }
+      }`
+      )
+      .token(
+        preview
+          ? process.env.PREPRIO_PREVIEW_TOKEN
+          : process.env.PREPRIO_PRODUCTION_TOKEN
+      )
+      .fetch()) || []
+
+  return data.data.Posts.items
+}
+
+export async function getAllPostsWithSlug() {
+  // Query publications
+  const data =
+    (await prepr
+      .graphqlQuery(
+        `
+      query {
+        Posts {
+          items {
+            slug : _slug,
+          }
+        }
+      }`
+      )
+      .fetch()) || []
+
+  return data.data.Posts.items
+}
+
+export async function getPostAndMorePosts(slug, preview) {
+  // Query publications
+  const data =
+    (await prepr
+      .graphqlQuery(
+        `
+      query slugPost($slug: String!) {
+        Post ( slug : $slug) {
+            _id,
+            _slug,
+            date: _publish_on
+            title,
+            summary,
+            content,
+            author {
+                name
+                cover {
+                    cdn_files {
+                        url(width: 100, height:100)
+                    }
+                }
+            }
+            cover {
+                cdn_files {
+                    url(width:2000, height:1000)
+                }
+            }
+          }
+        morePosts : Posts(where : { _slug_nany : [$slug] }) {
+          items {
+            _id,
+            _slug,
+            date: _publish_on
+            title,
+            summary,
+            author {
+                name
+                cover {
+                    cdn_files {
+                        url(width: 100, height:100)
+                    }
+                }
+            }
+            cover {
+                cdn_files {
+                    url(width:2000, height:1000)
+                }
+            }
+          }
+        }          
+      }`
+      )
+      .graphqlVariables({
+        slug: slug,
+      })
+      .token(
+        preview
+          ? process.env.PREPRIO_PREVIEW_TOKEN
+          : process.env.PREPRIO_PRODUCTION_TOKEN
+      )
+      .fetch()) || []
+
+  return data.data
+}
+
+export async function getPreviewPostBySlug(slug) {
+  // Query publications
+  const data =
+    (await prepr
+      .graphqlQuery(
+        `
+      query preview($slug: String!) {
+        Post ( slug : $slug) {
+            _id,
+            slug : _slug
+          }          
+      }`
+      )
+      .token(process.env.PREPRIO_PREVIEW_TOKEN)
+      .graphqlVariables({
+        slug: slug,
+      })
+      .fetch()) || []
+
+  return data.data.Post
+}

examples/cms-prepr/models/author.json

+{
+  "id": "f7153965-7bc9-4b9b-b964-49129b34c5e8",
+  "created_on": "2021-03-04T12:03:46+00:00",
+  "changed_on": "2021-03-04T12:03:46+00:00",
+  "body": "Author",
+  "description": null,
+  "label": "PublicationModel",
+  "status": "published",
+  "stories": false,
+  "timelines": false,
+  "allow_stories": false,
+  "channels": false,
+  "allow_channels": false,
+  "container_required": false,
+  "channels_required": false,
+  "seo_score": false,
+  "ab_testing": false,
+  "versioning": false,
+  "slug": null,
+  "for": null,
+  "fields": [
+    {
+      "type": "Text",
+      "required": false,
+      "preview": true,
+      "body": "Name",
+      "view": "single_line",
+      "localized": true,
+      "id": "fd7f062f-84e4-4362-9e15-61c1a26a4078",
+      "api_id": "name",
+      "created_on": "2021-03-04T12:03:55+00:00",
+      "changed_on": "2021-03-04T12:03:55+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": "single_line",
+      "accept_restrictions": null,
+      "no_html": false
+    },
+    {
+      "accept": ["photo"],
+      "max": "1",
+      "preview": true,
+      "type": "Asset",
+      "min": "1",
+      "required": true,
+      "body": "Cover Image",
+      "localized": true,
+      "id": "fd81a8e2-2f59-44b7-b3b2-873a27958db1",
+      "api_id": "cover",
+      "created_on": "2021-03-04T12:04:13+00:00",
+      "changed_on": "2021-03-04T12:04:13+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": null,
+      "accept_restrictions": null,
+      "presets_change_required": false
+    }
+  ]
+}

examples/cms-prepr/models/post.json

+{
+  "id": "4da8ca3d-86c2-40ba-84c0-5ea949293b9b",
+  "created_on": "2021-03-04T12:02:44+00:00",
+  "changed_on": "2021-03-04T12:10:37+00:00",
+  "body": "Post",
+  "description": null,
+  "label": "PublicationModel",
+  "status": "published",
+  "stories": false,
+  "timelines": false,
+  "allow_stories": false,
+  "channels": false,
+  "allow_channels": false,
+  "container_required": false,
+  "channels_required": false,
+  "seo_score": false,
+  "ab_testing": false,
+  "versioning": false,
+  "slug": null,
+  "for": null,
+  "fields": [
+    {
+      "type": "Text",
+      "required": false,
+      "preview": true,
+      "body": "Title",
+      "view": "single_line",
+      "localized": true,
+      "id": "7aa96451-d3b5-41e9-b012-77f66dd2213b",
+      "api_id": "title",
+      "created_on": "2021-03-04T12:02:49+00:00",
+      "changed_on": "2021-03-04T12:02:49+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": "single_line",
+      "accept_restrictions": null,
+      "no_html": false
+    },
+    {
+      "type": "Text",
+      "required": false,
+      "preview": true,
+      "body": "Summary",
+      "view": "textarea",
+      "localized": true,
+      "id": "ea6a35ca-5a39-4786-9cf7-15e917a0dcf4",
+      "api_id": "summary",
+      "created_on": "2021-03-04T12:02:59+00:00",
+      "changed_on": "2021-03-04T12:02:59+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": "textarea",
+      "accept_restrictions": null,
+      "no_html": false
+    },
+    {
+      "accept": [
+        "bold",
+        "italic",
+        "underline",
+        "unordered-list",
+        "ordered-list",
+        "link",
+        "table"
+      ],
+      "preview": true,
+      "view": "html_editor",
+      "type": "Text",
+      "required": false,
+      "body": "Content",
+      "localized": true,
+      "id": "cd31e930-a08c-4740-903e-5c41fcd1c555",
+      "api_id": "content",
+      "created_on": "2021-03-04T12:04:36+00:00",
+      "changed_on": "2021-03-04T12:04:36+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": "html_editor",
+      "accept_restrictions": null,
+      "no_html": false
+    },
+    {
+      "accept": ["photo"],
+      "max": "1",
+      "preview": true,
+      "type": "Asset",
+      "min": "1",
+      "required": true,
+      "body": "Cover Image",
+      "localized": true,
+      "id": "cfca83f3-5a73-4567-bde1-4adeb57915d0",
+      "api_id": "cover",
+      "created_on": "2021-03-04T12:03:17+00:00",
+      "changed_on": "2021-03-04T12:03:17+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": null,
+      "accept_restrictions": null,
+      "presets_change_required": false
+    },
+    {
+      "type": "Publication",
+      "min": "1",
+      "required": true,
+      "max": "1",
+      "preview": false,
+      "body": "Author",
+      "localized": true,
+      "id": "8308380f-af0a-40e7-ae30-33b2f7ce93d9",
+      "api_id": "author",
+      "created_on": "2021-03-04T12:04:51+00:00",
+      "changed_on": "2021-03-04T12:04:51+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "description": null,
+      "disable_editing": false,
+      "appearance": null,
+      "accept_restrictions": null
+    },
+    {
+      "type": "Slug",
+      "description": "The slug is generated automatically. You can change the slug, as long as it is unique.",
+      "body": "Slug",
+      "id": "7214e365-1b4c-4de3-8412-e311250fb4da",
+      "api_id": null,
+      "created_on": "2021-03-04T12:03:32+00:00",
+      "changed_on": "2021-03-04T12:03:32+00:00",
+      "label": "PublicationModelField",
+      "title": false,
+      "seo_title": false,
+      "seo_description": false,
+      "required": false,
+      "localized": false,
+      "preview": false,
+      "disable_editing": false,
+      "appearance": null,
+      "accept_restrictions": null
+    }
+  ]
+}

examples/cms-prepr/next.config.js

+module.exports = {
+  images: {
+    domains: ['b-cdn.net'],
+  },
+}

examples/cms-prepr/package.json

+{
+  "name": "cms-prepr",
+  "version": "1.0.0",
+  "scripts": {
+    "dev": "next",
+    "build": "next build",
+    "start": "next start"
+  },
+  "dependencies": {
+    "@preprio/nodejs-sdk": "^1.1.0",
+    "autoprefixer": "10.1.0",
+    "classnames": "2.2.6",
+    "date-fns": "2.10.0",
+    "next": "latest",
+    "postcss": "8.2.2",
+    "react": "17.0.1",
+    "react-dom": "17.0.1"
+  },
+  "devDependencies": {
+    "postcss-flexbugs-fixes": "^5.0.2",
+    "postcss-preset-env": "^6.7.0",
+    "tailwindcss": "2.0.2"
+  },
+  "license": "MIT"
+}

examples/cms-prepr/pages/_app.js

+import '../styles/index.css'
+
+function MyApp({ Component, pageProps }) {
+  return <Component {...pageProps} />
+}
+
+export default MyApp

examples/cms-prepr/pages/_document.js

+import Document, { Html, Head, Main, NextScript } from 'next/document'
+
+export default class MyDocument extends Document {
+  render() {
+    return (
+      <Html lang="en">
+        <Head />
+        <body>
+          <Main />
+          <NextScript />
+        </body>
+      </Html>
+    )
+  }
+}

examples/cms-prepr/pages/api/exit-preview.js

+export default async function handler(_, res) {
+  // Exit the current user from "Preview Mode". This function accepts no args.
+  res.clearPreviewData()
+
+  // Redirect the user back to the index page.
+  res.writeHead(307, { Location: '/' })
+  res.end()
+}

examples/cms-prepr/pages/api/preview.js

+import { getPreviewPostBySlug } from '../../lib/preprio'
+
+export default async function handler(req, res) {
+  // Check the secret and next parameters
+  // This secret should only be known to this API route and the CMS
+  if (req.query.secret !== process.env.PREPRIO_PREVIEW_KEY || !req.query.slug) {
+    return res.status(401).json({ message: 'Invalid token' })
+  }
+
+  // Fetch the headless CMS to check if the provided `slug` exists
+  const post = await getPreviewPostBySlug(req.query.slug)
+
+  // If the slug doesn't exist prevent preview mode from being enabled
+  if (!post) {
+    return res.status(401).json({ message: 'Invalid slug' })
+  }
+
+  // Enable Preview Mode by setting the cookies
+  res.setPreviewData({})
+
+  // Redirect to the path from the fetched post
+  // We don't redirect to req.query.slug as that might lead to open redirect vulnerabilities
+  res.writeHead(307, { Location: `/posts/${post.slug}` })
+  res.end()
+}

examples/cms-prepr/pages/index.js

+import Container from '../components/container'
+import MoreStories from '../components/more-stories'
+import HeroPost from '../components/hero-post'
+import Intro from '../components/intro'
+import Layout from '../components/layout'
+import { getAllPostsForHome } from '../lib/preprio'
+import Head from 'next/head'
+import { CMS_NAME } from '../lib/constants'
+
+export default function Index({ posts, preview }) {
+  const heroPost = posts[0]
+  const morePosts = posts.slice(1)
+  return (
+    <>
+      <Layout preview={preview}>
+        <Head>
+          <title>Next.js Blog Example with {CMS_NAME}</title>
+        </Head>
+        <Container>
+          <Intro />
+          {heroPost && (
+            <HeroPost
+              title={heroPost.title}
+              coverImage={heroPost.cover[0].cdn_files[0].url}
+              date={heroPost.date}
+              author={heroPost.author[0]}
+              slug={heroPost._slug}
+              excerpt={heroPost.summary}
+            />
+          )}
+          {morePosts.length > 0 && <MoreStories posts={morePosts} />}
+        </Container>
+      </Layout>
+    </>
+  )
+}
+
+export async function getStaticProps({ preview = false }) {
+  const posts = (await getAllPostsForHome(preview)) || []
+
+  return {
+    props: { posts, preview },
+  }
+}

examples/cms-prepr/pages/posts/[slug].js

+import { useRouter } from 'next/router'
+import ErrorPage from 'next/error'
+import Container from 'components/container'
+import PostBody from 'components/post-body'
+import MoreStories from 'components/more-stories'
+import Header from 'components/header'
+import PostHeader from 'components/post-header'
+import SectionSeparator from 'components/section-separator'
+import Layout from 'components/layout'
+import { getAllPostsWithSlug, getPostAndMorePosts } from 'lib/preprio'
+import PostTitle from 'components/post-title'
+import Head from 'next/head'
+import { CMS_NAME } from 'lib/constants'
+
+export default function Post({ post, morePosts, preview }) {
+  const router = useRouter()
+
+  if (!router.isFallback && !post?._slug) {
+    return <ErrorPage statusCode={404} />
+  }
+
+  return (
+    <Layout preview={preview}>
+      <Container>
+        <Header />
+        {router.isFallback ? (
+          <PostTitle>Loading…</PostTitle>
+        ) : (
+          <>
+            <article>
+              <Head>
+                <title>
+                  {post.title} | Next.js Blog Example with {CMS_NAME}
+                </title>
+                {/* <meta property="og:image" content={post.ogImage.url} /> */}
+              </Head>
+              <PostHeader
+                title={post.title}
+                coverImage={post.cover[0].cdn_files[0].url}
+                date={post.date}
+                author={post.author[0]}
+              />
+              <PostBody content={post.content} />
+            </article>
+            <SectionSeparator />
+            {morePosts.length > 0 && <MoreStories posts={morePosts} />}
+          </>
+        )}
+      </Container>
+    </Layout>
+  )
+}
+
+export async function getStaticProps({ params, preview = false }) {
+  const data = await getPostAndMorePosts(params.slug, preview)
+
+  return {
+    props: {
+      preview,
+      post: data.Post,
+      morePosts: data.morePosts.items || [],
+    },
+  }
+}
+
+export async function getStaticPaths() {
+  const posts = await getAllPostsWithSlug()
+
+  return {
+    paths: posts.map(({ slug }) => ({
+      params: { slug },
+    })),
+    fallback: true,
+  }
+}

examples/cms-prepr/postcss.config.js

+module.exports = {
+  plugins: [
+    'tailwindcss',
+    'postcss-flexbugs-fixes',
+    [
+      'postcss-preset-env',
+      {
+        autoprefixer: {
+          flexbox: 'no-2009',
+        },
+        stage: 3,
+        features: {
+          'custom-properties': false,
+        },
+      },
+    ],
+  ],
+}

examples/cms-prepr/public/favicon/browserconfig.xml

+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/favicons/mstile-150x150.png"/>
+            <TileColor>#000000</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

examples/cms-prepr/public/favicon/safari-pinned-tab.svg

+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN"
+ "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<svg version="1.0" xmlns="http://www.w3.org/2000/svg"
+ width="1024.000000pt" height="1024.000000pt" viewBox="0 0 1024.000000 1024.000000"
+ preserveAspectRatio="xMidYMid meet">
+<metadata>
+Created by potrace 1.11, written by Peter Selinger 2001-2013
+</metadata>
+<g transform="translate(0.000000,1024.000000) scale(0.100000,-0.100000)"
+fill="#000000" stroke="none">
+<path d="M4785 10234 c-22 -2 -92 -9 -155 -14 -1453 -131 -2814 -915 -3676
+-2120 -480 -670 -787 -1430 -903 -2235 -41 -281 -46 -364 -46 -745 0 -381 5
+-464 46 -745 278 -1921 1645 -3535 3499 -4133 332 -107 682 -180 1080 -224
+155 -17 825 -17 980 0 687 76 1269 246 1843 539 88 45 105 57 93 67 -8 6 -383
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+-60 -19 -211 -19 l-173 0 -46 29 c-30 19 -52 44 -67 73 l-21 45 2 2005 3 2006
+31 39 c16 21 50 48 74 61 41 20 57 22 230 22 204 0 238 -8 291 -66 15 -16 570
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+10 -757 21 -840 13z m2094 -3094 c48 -24 87 -70 101 -118 8 -26 10 -582 8
+-1835 l-3 -1798 -317 486 -318 486 0 1307 c0 845 4 1320 10 1343 16 56 51 100
+99 126 41 21 56 23 213 23 148 0 174 -2 207 -20z"/>
+<path d="M7843 789 c-35 -22 -46 -37 -15 -20 22 13 58 40 52 41 -3 0 -20 -10
+-37 -21z"/>
+<path d="M7774 744 c-18 -14 -18 -15 4 -4 12 6 22 13 22 15 0 8 -5 6 -26 -11z"/>
+<path d="M7724 714 c-18 -14 -18 -15 4 -4 12 6 22 13 22 15 0 8 -5 6 -26 -11z"/>
+<path d="M7674 684 c-18 -14 -18 -15 4 -4 12 6 22 13 22 15 0 8 -5 6 -26 -11z"/>
+<path d="M7598 644 c-38 -20 -36 -28 2 -9 17 9 30 18 30 20 0 7 -1 6 -32 -11z"/>
+</g>
+</svg>

examples/cms-prepr/public/favicon/site.webmanifest

+{
+  "name": "Next.js",
+  "short_name": "Next.js",
+  "icons": [
+    {
+      "src": "/favicons/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/favicons/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "theme_color": "#000000",
+  "background_color": "#000000",
+  "display": "standalone"
+}

examples/cms-prepr/styles/index.css

+/* purgecss start ignore */
+@tailwind base;
+@tailwind components;
+/* purgecss end ignore */
+@tailwind utilities;

examples/cms-prepr/tailwind.config.js

+module.exports = {
+  purge: ['./components/**/*.js', './pages/**/*.js'],
+  theme: {
+    extend: {
+      colors: {
+        'accent-1': '#FAFAFA',
+        'accent-2': '#EAEAEA',
+        'accent-7': '#333',
+        success: '#0070f3',
+        cyan: '#79FFE1',
+      },
+      spacing: {
+        28: '7rem',
+      },
+      letterSpacing: {
+        tighter: '-.04em',
+      },
+      lineHeight: {
+        tight: 1.2,
+      },
+      fontSize: {
+        '5xl': '2.5rem',
+        '6xl': '2.75rem',
+        '7xl': '4.5rem',
+        '8xl': '6.25rem',
+      },
+      boxShadow: {
+        small: '0 5px 10px rgba(0, 0, 0, 0.12)',
+        medium: '0 8px 30px rgba(0, 0, 0, 0.12)',
+      },
+    },
+  },
+}