.env.example

@@ -3,4 +3,17 @@ NEXT_PUBLIC_GISCUS_REPOSITORY_ID=
 NEXT_PUBLIC_GISCUS_CATEGORY=
 NEXT_PUBLIC_GISCUS_CATEGORY_ID=
 NEXT_PUBLIC_UTTERANCES_REPO=
-NEXT_PUBLIC_DISQUS_SHORTNAME=
+NEXT_PUBLIC_DISQUS_SHORTNAME=
+
+
+MAILCHIMP_API_KEY=
+MAILCHIMP_API_SERVER=
+MAILCHIMP_AUDIENCE_ID=
+
+BUTTONDOWN_API_URL=https://api.buttondown.email/v1/
+BUTTONDOWN_API_KEY=
+
+CONVERTKIT_API_URL=https://api.convertkit.com/v3/
+CONVERTKIT_API_KEY=
+// curl https://api.convertkit.com/v3/forms?api_key=<your_public_api_key> to get your form ID 
+CONVERTKIT_FORM_ID= 

components/FormSubscribe.js

@@ -0,0 +1,76 @@
+import { useRef, useState } from 'react'
+
+import siteMetadata from '@/data/siteMetadata'
+
+const FormSubscribe = () => {
+  const inputEl = useRef(null)
+  const [message, setMessage] = useState('')
+  const [subscribed, setSubscribed] = useState(false)
+
+  const subscribe = async (e) => {
+    e.preventDefault()
+
+    const res = await fetch(`/api/${siteMetadata.newsletter.provider}`, {
+      body: JSON.stringify({
+        email: inputEl.current.value,
+      }),
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      method: 'POST',
+    })
+
+    const { error } = await res.json()
+    if (error) {
+      setMessage('Your e-mail adress is invalid or you are already subscribed!')
+      return
+    }
+
+    inputEl.current.value = ''
+    setSubscribed(true)
+    setMessage('Successfully! 🎉 You are now subscribed.')
+  }
+
+  return (
+    <div>
+      <form
+        // className="mt-6 flex flex-col sm:flex-row lg:mt-0 lg:justify-begin"
+        className="flex flex-col sm:flex-row lg:justify-begin"
+        onSubmit={subscribe}
+      >
+        <div>
+          <label className="sr-only" htmlFor="email-input">
+            Email address
+          </label>
+          <input
+            autoComplete="email"
+            className="appearance-none w-full px-4 py-2 border border-neutrals-cool-grey-300 text-base rounded-md text-neutrals-cool-grey-900 bg-white dark:bg-black placeholder-gray-500 focus:outline-none focus:ring-primary-400 dark:focus:border-primary-600 lg:max-w-xs"
+            id="email-input"
+            name="email"
+            placeholder={subscribed ? "You're subscribed !  🎉" : 'Enter your email'}
+            ref={inputEl}
+            required
+            type="email"
+            disabled={subscribed}
+          />
+        </div>
+        <div className="mt-2 flex-shrink-0 w-full flex rounded-md shadow-sm sm:mt-0 sm:ml-3 sm:w-auto sm:inline-flex">
+          <button
+            className={`w-full bg-primary-500 dark:bg-primary-400 px-4 py-2 border border-transparent rounded-md flex items-center justify-center text-base font-medium text-white ${
+              subscribed ? 'cursor-default' : 'hover:bg-primary-700 dark:hover:bg-primary-300'
+            } focus:outline-none focus:ring-2 focus:ring-offset-2 focus:primary-700 sm:w-auto sm:inline-flex`}
+            type="submit"
+            disabled={subscribed}
+          >
+            {subscribed ? 'Thank you!' : 'Sign up'}
+          </button>
+        </div>
+      </form>
+      {/* <p className="text-sm text-gray-500 dark:text-gray-400 pt-2 flex flex-col sm:flex-row lg:mt-0 lg:justify-begin">
+        {message ? message : 'Enter your email address to be notified of new posts'}
+      </p> */}
+    </div>
+  )
+}
+
+export { FormSubscribe }

data/siteMetadata.js

@@ -22,6 +22,11 @@ const siteMetadata = {
     simpleAnalytics: false, // true or false
     googleAnalyticsId: '', // e.g. UA-000000-2 or G-XXXXXXX
   },
+  newsletter: {
+    // supports mailchimp, buttondown, convertkit
+    // Please add  your .env file and modify it according to your selection
+    provider: 'buttondown',
+  },
   comment: {
     // Select a provider and use the environment variables associated to it
     // https://vercel.com/docs/environment-variables
@@ -59,7 +64,7 @@ const siteMetadata = {
       // theme when dark mode
       darkTheme: '',
     },
-    disqus: {
+    disqusConfig: {
       // https://help.disqus.com/en/articles/1717111-what-s-a-shortname
       shortname: process.env.NEXT_PUBLIC_DISQUS_SHORTNAME,
     },

package.json

@@ -12,6 +12,7 @@
     "prepare": "husky install"
   },
   "dependencies": {
+    "@mailchimp/mailchimp_marketing": "^3.0.58",
     "@tailwindcss/forms": "^0.3.2",
     "@tailwindcss/typography": "^0.4.0",
     "autoprefixer": "^10.2.5",

pages/api/buttondown.js

@@ -0,0 +1,31 @@
+// eslint-disable-next-line import/no-anonymous-default-export
+export default async (req, res) => {
+  const { email } = req.body
+  if (!email) {
+    return res.status(400).json({ error: 'Email is required' })
+  }
+
+  try {
+    const API_KEY = process.env.BUTTONDOWN_API_KEY
+    const buttondownRoute = `${process.env.BUTTONDOWN_API_URL}subscribers`
+    console.log('route : ', buttondownRoute)
+    const response = await fetch(buttondownRoute, {
+      body: JSON.stringify({
+        email,
+      }),
+      headers: {
+        Authorization: `Token ${API_KEY}`,
+        'Content-Type': 'application/json',
+      },
+      method: 'POST',
+    })
+
+    if (response.status >= 400) {
+      return res.status(500).json({ error: `There was an error subscribing to the list.` })
+    }
+
+    return res.status(201).json({ error: '' })
+  } catch (error) {
+    return res.status(500).json({ error: error.message || error.toString() })
+  }
+}

pages/api/convertkit.js

@@ -0,0 +1,36 @@
+/* eslint-disable import/no-anonymous-default-export */
+export default async (req, res) => {
+  const { email } = req.body
+  console.log('email : ', email)
+
+  if (!email) {
+    return res.status(400).json({ error: 'Email is required' })
+  }
+
+  try {
+    const FORM_ID = process.env.CONVERTKIT_FORM_ID
+    const API_KEY = process.env.CONVERTKIT_API_KEY
+    const API_URL = process.env.CONVERTKIT_API_URL
+
+    // Send request to ConvertKit
+    const data = { email, api_key: API_KEY }
+
+    const response = await fetch(`${API_URL}forms/${FORM_ID}/subscribe`, {
+      body: JSON.stringify(data),
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      method: 'POST',
+    })
+
+    if (response.status >= 400) {
+      return res.status(400).json({
+        error: `There was an error subscribing to the list.`,
+      })
+    }
+
+    return res.status(201).json({ error: '' })
+  } catch (error) {
+    return res.status(500).json({ error: error.message || error.toString() })
+  }
+}

pages/api/mailchimp.js

@@ -0,0 +1,25 @@
+import mailchimp from '@mailchimp/mailchimp_marketing'
+
+mailchimp.setConfig({
+  apiKey: process.env.MAILCHIMP_API_KEY,
+  server: process.env.MAILCHIMP_API_SERVER, // E.g. us1
+})
+
+// eslint-disable-next-line import/no-anonymous-default-export
+export default async (req, res) => {
+  const { email } = req.body
+
+  if (!email) {
+    return res.status(400).json({ error: 'Email is required' })
+  }
+
+  try {
+    const test = await mailchimp.lists.addListMember(process.env.MAILCHIMP_AUDIENCE_ID, {
+      email_address: email,
+      status: 'subscribed',
+    })
+    return res.status(201).json({ error: '' })
+  } catch (error) {
+    return res.status(500).json({ error: error.message || error.toString() })
+  }
+}

pages/index.js

@@ -5,6 +5,8 @@ import siteMetadata from '@/data/siteMetadata'
 import { getAllFilesFrontMatter } from '@/lib/mdx'
 import formatDate from '@/lib/utils/formatDate'
 
+import { FormSubscribe } from '@/components/FormSubscribe'
+
 const MAX_DISPLAY = 5
 
 export async function getStaticProps() {
@@ -89,6 +91,16 @@ export default function Home({ posts }) {
           </Link>
         </div>
       )}
+      {siteMetadata.newsletter.provider !== '' && (
+        <div className="flex flex-col md:flex-row justify-between items-center">
+          <h1 className="text-3xl font-extrabold tracking-tight text-gray-900 dark:text-gray-100 sm:text-4xl md:text-6xl ">
+            Newsletter
+          </h1>
+          <div className="p-5">
+            <FormSubscribe />
+          </div>
+        </div>
+      )}
     </>
   )
 }