From 00c118dc679689f308242cda3b5f46dbb4f27ec5 Mon Sep 17 00:00:00 2001
From: Kamran Ahmed <kamranahmed.se@gmail.com>
Date: Tue, 3 Jan 2023 18:09:56 +0400
Subject: [PATCH] Add captcha on forms

---
 src/components/Captcha/Captcha.astro | 16 ++++++
 src/components/Captcha/captcha.js    | 77 ++++++++++++++++++++++++++++
 src/components/DownloadPopup.astro   | 48 ++++++++---------
 src/components/SubscribePopup.astro  | 46 ++++++++---------
 src/pages/signup.astro               | 10 +---
 5 files changed, 136 insertions(+), 61 deletions(-)
 create mode 100644 src/components/Captcha/Captcha.astro
 create mode 100644 src/components/Captcha/captcha.js

diff --git a/src/components/Captcha/Captcha.astro b/src/components/Captcha/Captcha.astro
new file mode 100644
index 000000000..9eefa9c10
--- /dev/null
+++ b/src/components/Captcha/Captcha.astro
@@ -0,0 +1,16 @@
+---
+---
+
+<script
+  src='https://www.google.com/recaptcha/api.js?onload=onCaptchaLoad&render=explicit'
+  async
+  defer
+  slot='after-header'
+></script>
+
+<script src='./captcha.js'></script>
+
+<!-- Captcha form start -->
+<div class='recaptcha-field mb-2'></div>
+<input type='hidden' name='g-recaptcha-response' class='recaptcha-response' />
+<!-- Catpcha form end -->
diff --git a/src/components/Captcha/captcha.js b/src/components/Captcha/captcha.js
new file mode 100644
index 000000000..a68f80b86
--- /dev/null
+++ b/src/components/Captcha/captcha.js
@@ -0,0 +1,77 @@
+class Captcha {
+  constructor() {
+    this.onDOMLoaded = this.onDOMLoaded.bind(this);
+    this.bindValidation = this.bindValidation.bind(this);
+    this.validateCaptchaBeforeSubmit =
+      this.validateCaptchaBeforeSubmit.bind(this);
+    this.onCaptchaLoad = this.onCaptchaLoad.bind(this);
+  }
+
+  validateCaptchaBeforeSubmit(e) {
+    const target = e.target;
+    const captchaField = target.querySelector('.recaptcha-field');
+
+    if (captchaField) {
+      const captchaId = captchaField.dataset.recaptchaId;
+      const captchaResponse = window.grecaptcha.getResponse(captchaId);
+
+      // If valid captcha is not present, prevent form submission
+      if (!captchaResponse) {
+        e.preventDefault();
+        alert('Please verify that you are human first');
+        return false;
+      }
+
+      target.querySelector('.recaptcha-response').value = captchaResponse;
+    }
+
+    target.closest('.modal').classList.add('hidden');
+    return true;
+  }
+
+  bindValidation() {
+    const forms = document.querySelectorAll('.validate-captcha-form');
+
+    forms.forEach((form) => {
+      form.addEventListener('submit', this.validateCaptchaBeforeSubmit);
+    });
+  }
+
+  onCaptchaLoad() {
+    if (!window.grecaptcha) {
+      console.warn('window.grecaptcha is not defined');
+      return;
+    }
+
+    const recaptchaFields = document.querySelectorAll('.recaptcha-field');
+
+    console.log(recaptchaFields);
+
+    // render recaptcha on fields
+    recaptchaFields.forEach((field) => {
+      // If captcha already rendered for this field
+      if (field.hasAttribute('data-recaptcha-id')) {
+        return;
+      }
+
+      const renderedId = window.grecaptcha.render(field, {
+        sitekey: '6Ldn2YsjAAAAABlUxNxukAuDAUIuZIhO0hRVxzJW',
+      });
+
+      field.setAttribute('data-recaptcha-id', renderedId);
+    });
+  }
+
+  onDOMLoaded() {
+    this.bindValidation();
+  }
+
+  init() {
+    window.addEventListener('DOMContentLoaded', this.onDOMLoaded);
+  }
+}
+
+const captcha = new Captcha();
+captcha.init();
+
+window.onCaptchaLoad = captcha.onCaptchaLoad;
diff --git a/src/components/DownloadPopup.astro b/src/components/DownloadPopup.astro
index 2192988c3..c06362b68 100644
--- a/src/components/DownloadPopup.astro
+++ b/src/components/DownloadPopup.astro
@@ -1,45 +1,39 @@
 ---
-import Popup from "./Popup/Popup.astro";
+import Popup from './Popup/Popup.astro';
+import Captcha from './Captcha/Captcha.astro';
 ---
 
 <Popup
-  id="download-popup"
-  title="Download Roadmap"
-  subtitle="Enter your email below to receive the download link."
+  id='download-popup'
+  title='Download Roadmap'
+  subtitle='Enter your email below to receive the download link.'
 >
   <form
-    action="https://newsletter.roadmap.sh/subscribe"
-    method="POST"
-    accept-charset="utf-8"
-    target="_blank"
-    class="validate-captcha-form"
+    action='https://newsletter.roadmap.sh/subscribe'
+    method='POST'
+    accept-charset='utf-8'
+    target='_blank'
+    class='validate-captcha-form'
   >
     <input
-      type="email"
-      name="email"
-      id="email"
+      type='email'
+      name='email'
+      id='email'
       required
       autofocus
-      class="w-full rounded-md border text-md py-2.5 px-3 mb-2"
-      placeholder="Enter your Email"
+      class='w-full rounded-md border text-md py-2.5 px-3 mb-2'
+      placeholder='Enter your Email'
     />
 
-    <!-- {# Captcha Form Start #} -->
-    <div class="recaptcha-field mb-2"></div>
-    <input
-      type="hidden"
-      name="g-recaptcha-response"
-      class="recaptcha-response"
-    />
-    <!-- {# Captcha Form End #} -->
+    <Captcha />
 
-    <input type="hidden" name="list" value="tTqz1w7nexY3cWDpLnI88Q" />
-    <input type="hidden" name="subform" value="yes" />
+    <input type='hidden' name='list' value='tTqz1w7nexY3cWDpLnI88Q' />
+    <input type='hidden' name='subform' value='yes' />
 
     <button
-      type="submit"
-      name="submit"
-      class="text-white bg-gradient-to-r from-amber-700 to-blue-800 hover:from-amber-800 hover:to-blue-900 font-regular rounded-md text-md px-5 py-2.5 w-full text-center mr-2"
+      type='submit'
+      name='submit'
+      class='text-white bg-gradient-to-r from-amber-700 to-blue-800 hover:from-amber-800 hover:to-blue-900 font-regular rounded-md text-md px-5 py-2.5 w-full text-center mr-2'
     >
       Send Link
     </button>
diff --git a/src/components/SubscribePopup.astro b/src/components/SubscribePopup.astro
index 0d61751cd..1dfc4a002 100644
--- a/src/components/SubscribePopup.astro
+++ b/src/components/SubscribePopup.astro
@@ -1,44 +1,38 @@
 ---
-import Popup from "./Popup/Popup.astro";
+import Popup from './Popup/Popup.astro';
+import Captcha from './Captcha/Captcha.astro';
 ---
 
 <Popup
-  id="subscribe-popup"
-  title="Subscribe"
-  subtitle="Enter your email below to receive updates."
+  id='subscribe-popup'
+  title='Subscribe'
+  subtitle='Enter your email below to receive updates.'
 >
   <form
-    action="https://newsletter.roadmap.sh/subscribe"
-    method="POST"
-    accept-charset="utf-8"
-    target="_blank"
-    class="validate-captcha-form"
+    action='https://newsletter.roadmap.sh/subscribe'
+    method='POST'
+    accept-charset='utf-8'
+    target='_blank'
+    class='validate-captcha-form'
   >
     <input
-      type="email"
-      name="email"
+      type='email'
+      name='email'
       required
       autofocus
-      class="w-full rounded-md border text-md py-2.5 px-3 mb-2"
-      placeholder="Enter your Email"
+      class='w-full rounded-md border text-md py-2.5 px-3 mb-2'
+      placeholder='Enter your Email'
     />
 
-    <!-- Captcha Form Start -->
-    <div class="recaptcha-field mb-2"></div>
-    <input
-      type="hidden"
-      name="g-recaptcha-response"
-      class="recaptcha-response"
-    />
-    <!-- Captcha Form End -->
+    <Captcha />
 
-    <input type="hidden" name="list" value="tTqz1w7nexY3cWDpLnI88Q" />
-    <input type="hidden" name="subform" value="yes" />
+    <input type='hidden' name='list' value='tTqz1w7nexY3cWDpLnI88Q' />
+    <input type='hidden' name='subform' value='yes' />
 
     <button
-      type="submit"
-      name="submit"
-      class="text-white bg-gradient-to-r from-amber-700 to-blue-800 hover:from-amber-800 hover:to-blue-900 font-regular rounded-md text-md px-5 py-2.5 w-full text-center mr-2"
+      type='submit'
+      name='submit'
+      class='text-white bg-gradient-to-r from-amber-700 to-blue-800 hover:from-amber-800 hover:to-blue-900 font-regular rounded-md text-md px-5 py-2.5 w-full text-center mr-2'
     >
       Subscribe
     </button>
diff --git a/src/pages/signup.astro b/src/pages/signup.astro
index 4cd555077..91adf09ce 100644
--- a/src/pages/signup.astro
+++ b/src/pages/signup.astro
@@ -1,4 +1,5 @@
 ---
+import Captcha from '../components/Captcha/Captcha.astro';
 import BaseLayout from '../layouts/BaseLayout.astro';
 ---
 
@@ -35,14 +36,7 @@ import BaseLayout from '../layouts/BaseLayout.astro';
           placeholder='Enter your email'
         />
 
-        <!-- Captcha form start -->
-        <div class='recaptcha-field mb-2'></div>
-        <input
-          type='hidden'
-          name='g-recaptcha-response'
-          class='recaptcha-response'
-        />
-        <!-- Catpcha form end -->
+        <Captcha />
 
         <input type='hidden' name='list' value='tTqz1w7nexY3cWDpLnI88Q' />
         <input type='hidden' name='subform' value='yes' />