From 862377b9292d05be72c89f61ba182d56056f757f Mon Sep 17 00:00:00 2001
From: Daniel Gonzalez <danielhumgon@gmail.com>
Date: Thu, 10 Jul 2025 19:02:01 -0400
Subject: [PATCH] feat(nostr): Added Nostr account following

---
 .../nostr/content-creators/content-card.js    |  32 ++--
 .../content-creators/content-creators-list.js |  49 +++++-
 .../nostr/content-creators/follow-btn.js      | 142 ++++++++++++++++++
 3 files changed, 205 insertions(+), 18 deletions(-)
 create mode 100644 src/components/app-body/nostr/content-creators/follow-btn.js

diff --git a/src/components/app-body/nostr/content-creators/content-card.js b/src/components/app-body/nostr/content-creators/content-card.js
index 496e0dc..4e54310 100644
--- a/src/components/app-body/nostr/content-creators/content-card.js
+++ b/src/components/app-body/nostr/content-creators/content-card.js
@@ -6,12 +6,13 @@ import React, { useState, useEffect } from 'react'
 import { Card } from 'react-bootstrap'
 import Jdenticon from '@chris.troutner/react-jdenticon'
 import CopyOnClick from '../../bch-wallet/copy-on-click.js'
+import FollowBtn from './follow-btn.js'
 import { RelayPool } from 'nostr'
 
 function ContentCard (props) {
   const [profile, setProfile] = useState([])
   const [loaded, setLoaded] = useState(false)
-  const { creator } = props
+  const { creator, followList, refreshFollowList } = props
 
   useEffect(() => {
     const loadProfile = async () => {
@@ -103,13 +104,14 @@ function ContentCard (props) {
 
             {/* Action Buttons */}
             <div className='flex-shrink-0 d-flex flex-column gap-2'>
-              <button
-                className='btn btn-outline-danger btn-sm rounded-pill px-3'
-                style={{ fontSize: '0.875rem', minWidth: '100px' }}
-              >
-                <i className='bi bi-person-plus me-1' />
-                Follow
-              </button>
+              <FollowBtn
+                creator={creator}
+                appData={props.appData}
+                creatorProfile={profile}
+                followList={followList}
+                refreshFollowList={refreshFollowList}
+
+              />
               <button
                 className='btn btn-primary btn-sm rounded-pill px-3'
                 style={{ fontSize: '0.875rem', minWidth: '100px' }}
@@ -169,13 +171,13 @@ function ContentCard (props) {
 
             {/* Action Buttons */}
             <div className='d-flex gap-2'>
-              <button
-                className='btn btn-outline-danger btn-sm rounded-pill px-3'
-                style={{ fontSize: '0.875rem' }}
-              >
-                <i className='bi bi-person-plus me-1' />
-                Follow
-              </button>
+              <FollowBtn
+                creator={creator}
+                appData={props.appData}
+                creatorProfile={profile}
+                followList={followList}
+                refreshFollowList={refreshFollowList}
+              />
               <button
                 className='btn btn-primary btn-sm rounded-pill px-3'
                 style={{ fontSize: '0.875rem' }}
diff --git a/src/components/app-body/nostr/content-creators/content-creators-list.js b/src/components/app-body/nostr/content-creators/content-creators-list.js
index 0c3643c..84c78dd 100644
--- a/src/components/app-body/nostr/content-creators/content-creators-list.js
+++ b/src/components/app-body/nostr/content-creators/content-creators-list.js
@@ -1,15 +1,51 @@
-import React, { useState, useEffect } from 'react'
+import React, { useState, useEffect, useCallback } from 'react'
 import { Container, Spinner } from 'react-bootstrap'
 
 import axios from 'axios'
 // Local libraries
 import config from '../../../../config'
 import ContentCard from './content-card'
+import { RelayPool } from 'nostr'
+
 // Global variables and constants
 const SERVER = config.dexServer
 function ContentCreators (props) {
   const [creators, setCreators] = useState([])
   const [loaded, setLoaded] = useState(false)
+  const { appData } = props
+
+  const [followList, setFollowList] = useState([])
+
+  const getFollowList = useCallback(async () => {
+    const list = await new Promise((resolve, reject) => {
+      let list = []
+      const { nostrKeyPair } = appData.bchWalletState
+      const psf = 'wss://nostr-relay.psfoundation.info'
+
+      const pool = RelayPool([psf])
+      pool.on('open', relay => {
+        relay.subscribe('subid', { limit: 1, kinds: [3], authors: [nostrKeyPair.pubHex] })
+      })
+
+      pool.on('eose', relay => {
+        console.log('Closing Relay')
+        relay.close()
+        /** This ensures to return an empty array if no records are found!
+         *  Applies for new users that don't have a follow list
+        */
+        resolve(list)
+      })
+
+      pool.on('event', (relay, subId, ev) => {
+        console.log('Received event:', ev)
+        list = ev.tags
+        resolve(list)
+      })
+    })
+
+    console.log('Follow List', list)
+    setFollowList(list)
+  }, [appData])
 
   useEffect(() => {
     const loadCreators = async () => {
@@ -25,8 +61,9 @@ function ContentCreators (props) {
 
     if (!loaded) {
       loadCreators()
+      getFollowList()
     }
-  }, [loaded])
+  }, [loaded, followList, getFollowList])
 
   return (
     <Container className='mt-4 mb-5'>
@@ -47,7 +84,13 @@ function ContentCreators (props) {
       {loaded && (
         <div>
           {creators.map((creator, i) => (
-            <ContentCard key={`creator-key${i}`} creator={creator} appData={props.appData} />
+            <ContentCard
+              key={`creator-key${i}`}
+              creator={creator}
+              appData={props.appData}
+              followList={followList}
+              refreshFollowList={getFollowList}
+            />
           ))}
         </div>
       )}
diff --git a/src/components/app-body/nostr/content-creators/follow-btn.js b/src/components/app-body/nostr/content-creators/follow-btn.js
new file mode 100644
index 0000000..e9c9afe
--- /dev/null
+++ b/src/components/app-body/nostr/content-creators/follow-btn.js
@@ -0,0 +1,142 @@
+import React, { useState, useEffect } from 'react'
+import { Spinner } from 'react-bootstrap'
+import { finalizeEvent } from 'nostr-tools/pure'
+import { Relay } from 'nostr-tools/relay'
+import { hexToBytes } from '@noble/hashes/utils'
+
+function FollowBtn (props) {
+  const [onFetch, setOnFetch] = useState(false)
+  const [isFollowing, setIsFollowing] = useState(false)
+  const { creator, appData, creatorProfile, followList, refreshFollowList } = props
+
+  useEffect(() => {
+    const isFollowing = followList.find(item => item[1] === creator.pubkey)
+    setIsFollowing(isFollowing)
+  }, [followList, creator.pubkey])
+
+  // Add creator to the follow list
+  const handleFollow = async () => {
+    try {
+      setOnFetch(true)
+      // Get current follow list
+      const currentList = followList
+      console.log('currentList', currentList)
+
+      // find if creator is in the list
+      const existing = currentList.find(item => item[1] === creator.pubkey)
+      if (!existing) {
+        const creatorName = creatorProfile.name || ''
+
+        // add creator to the list
+        currentList.push(['p', creator.pubkey, 'wss://nostr-relay.psfoundation.info', creatorName])
+        await submitFollowList(currentList)
+        await refreshFollowList()
+      } else {
+        console.log('Already Followed')
+      }
+
+      setOnFetch(false)
+    } catch (error) {
+      console.warn(error)
+      setOnFetch(false)
+    }
+  }
+
+  // Add creator to the follow list
+  const handleUnfollow = async () => {
+    try {
+      setOnFetch(true)
+      // Get current follow list
+      const currentList = followList
+      console.log('currentList', currentList)
+
+      // find if creator is in the list
+      const existing = currentList.find(item => item[1] === creator.pubkey)
+      if (existing) {
+        // remove creator from the list
+        currentList.splice(currentList.indexOf(existing), 1)
+        await submitFollowList(currentList)
+        await refreshFollowList()
+      }
+
+      setOnFetch(false)
+    } catch (error) {
+      console.warn(error)
+      setOnFetch(false)
+    }
+  }
+
+  const submitFollowList = async (newList) => {
+    try {
+      const { nostrKeyPair } = appData.bchWalletState
+
+      // Convert private key to binary
+      const privateKeyBin = hexToBytes(nostrKeyPair.privHex)
+
+      // Relay list
+      const psf = 'wss://nostr-relay.psfoundation.info'
+
+      // Generate a post.
+      const eventTemplate = {
+        kind: 3,
+        created_at: Math.floor(Date.now() / 1000),
+        tags: newList,
+        content: ''
+      }
+      console.log(`eventTemplate: ${JSON.stringify(eventTemplate, null, 2)}`)
+
+      // Sign the post
+      const signedEvent = finalizeEvent(eventTemplate, privateKeyBin)
+      console.log('signedEvent: ', signedEvent)
+
+      // Connect to a relay.
+      const relay = await Relay.connect(psf)
+      console.log(`connected to ${relay.url}`)
+
+      // Publish the message to the relay.
+      const result = await relay.publish(signedEvent)
+      console.log('result: ', result)
+
+      // Close the connection to the relay.
+      relay.close()
+      setTimeout(() => {
+        setOnFetch(false)
+      }, 1000)
+    } catch (error) {
+      console.warn(error)
+      setOnFetch(false)
+    }
+  }
+
+  return (
+    <>
+      {onFetch && (
+        <div className='d-flex justify-content-center'>
+          <Spinner animation='border' />
+        </div>
+      )}
+      {!onFetch && !isFollowing && (
+        <button
+          className='btn btn-outline-danger btn-sm rounded-pill px-3'
+          style={{ fontSize: '0.875rem', minWidth: '100px' }}
+          onClick={handleFollow}
+        >
+          <i className='bi bi-person-plus me-1' />
+          Follow
+        </button>
+      )}
+      {!onFetch && isFollowing && (
+        <button
+          className='btn btn-outline-danger btn-sm rounded-pill px-3'
+          style={{ fontSize: '0.875rem', minWidth: '100px' }}
+          onClick={handleUnfollow}
+        >
+          <i className='bi bi-person-plus me-1' />
+          Unfollow
+        </button>
+      )}
+    </>
+  )
+}
+
+export default FollowBtn