From 10c81f1ccd538a77d5801ff39bc48274bbea470c Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Sun, 22 Jan 2023 22:55:18 +0300
Subject: Message: subscribe/unsubscribe

---
 vnext/src/ui/Message.js | 42 ++++++++++++++++++++++++++++++++----------
 vnext/src/ui/Thread.js  | 24 ++++++++++++++++++++++--
 2 files changed, 54 insertions(+), 12 deletions(-)

diff --git a/vnext/src/ui/Message.js b/vnext/src/ui/Message.js
index d45395bb..3bb59a4a 100644
--- a/vnext/src/ui/Message.js
+++ b/vnext/src/ui/Message.js
@@ -14,9 +14,16 @@ import { UserLink } from './UserInfo';
 import { format, embedUrls } from '../utils/embed';
 import { useVisitor } from './VisitorContext';
 
+/**
+ * @callback ToggleSubscriptionCallback
+ * @param { import('../client').Message } message
+ */
+
 /**
  * @typedef {object} MessageProps
  * @property { import('../client').Message } data data
+ * @property {boolean} isThread
+ * @property {ToggleSubscriptionCallback} onToggleSubscription
  */
 
 /**
@@ -24,7 +31,7 @@ import { useVisitor } from './VisitorContext';
  *
  * @param {React.PropsWithChildren<{}> & MessageProps} props props
  */
-export default function Message({ data, children }) {
+export default function Message({ data, isThread = false, onToggleSubscription, children }) {
     const [visitor] = useVisitor();
     const isCode = (data.tags || []).indexOf('code') >= 0;
     const likesSummary = data.likes ? `${data.likes}` : 'Recommend';
@@ -68,7 +75,7 @@ export default function Message({ data, children }) {
                                     <span>&nbsp;&middot;&nbsp;</span>
                                     <Link to={{
                                         pathname: '/post',
-                                    }} state={{data: data}}>Edit</Link>
+                                    }} state={{ data: data }}>Edit</Link>
                                 </>
                             }
                         </div>
@@ -109,16 +116,31 @@ export default function Message({ data, children }) {
                         <span>{likesSummary}</span>
                     </Link>
                 )}
-                {data.user && canComment && (
-                    <Link to={`/${data.user.uname}/${data.mid}`} className="a-comment msg-button"
-                        state={{ data: data }}>
-                        <Icon name="ei-comment" size="s" />
-                        <span>{commentsSummary}</span>
-                    </Link>
-                )}
+                {
+                    data.user && canComment && ((
+                        isThread ? (
+                            <Link className="msg-button" onClick={() => { onToggleSubscription(data); }}>
+                                {
+                                    data.subscribed ? (<>
+                                        <Icon name="ei-check" size="s" />
+                                        <span>Subscribed</span>
+                                    </>) : (<>
+                                        <Icon name="ei-eye" size="s" />
+                                        <span>Subscribe</span>
+                                    </>)}
+                            </Link>
+                        ) : (
+                            <Link to={`/${data.user.uname}/${data.mid}`} className="a-comment msg-button"
+                                state={{ data: data }}>
+                                <Icon name="ei-comment" size="s" />
+                                <span>{commentsSummary}</span>
+                            </Link>
+                        )
+                    ))
+                }
             </nav>
             {children}
-        </div>
+        </div >
     );
 }
 
diff --git a/vnext/src/ui/Thread.js b/vnext/src/ui/Thread.js
index de1d74b2..2919e830 100644
--- a/vnext/src/ui/Thread.js
+++ b/vnext/src/ui/Thread.js
@@ -6,7 +6,7 @@ import Message from './Message';
 import MessageInput from './MessageInput';
 import Spinner from './Spinner';
 
-import { getMessages, comment, update } from '../api';
+import { getMessages, comment, update, post } from '../api';
 import { useVisitor } from './VisitorContext';
 import { Helmet } from 'react-helmet';
 /**
@@ -104,6 +104,26 @@ export default function Thread(props) {
 
   const loaders = Math.min(message.replies || 0, 10);
   const pageTitle = `${params.user} ${message && message.tags || 'thread'}`;
+  /** @type { import('./Message').ToggleSubscriptionCallback } */
+  const handleSubsciptionToggle = (message) => {
+    if (message.subscribed) {
+     if (confirm('Unsubscribe?')) {
+        post(`U #${message.mid}`).then((response) => {
+          if (response.status === 200) {
+            setMessage({...message, subscribed: false});
+          }
+        }).catch(console.error);
+     }
+    } else {
+      if (confirm('Subscribe?')) {
+        post(`S #${message.mid}`).then((response) => {
+          if (response.status === 200) {
+            setMessage({...message, subscribed: true});
+          }
+        }).catch(console.error);
+      }
+    }
+  };
   return (
     <>
       <Helmet>
@@ -111,7 +131,7 @@ export default function Thread(props) {
       </Helmet>
       {
         message.mid ? (
-          <Message data={message}>
+          <Message key={message.mid} data={message} isThread={true} onToggleSubscription={handleSubsciptionToggle}>
             {active === (message.rid || 0) && <MessageInput data={message} text={editing.body || ''} onSend={postComment}>Write a comment...</MessageInput>}
           </Message>
         ) : (
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