From 6d5e8905d6a676ca966fa32f6823ebc1409caabe Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Wed, 19 Jun 2019 20:11:45 +0300
Subject: Post: user tags

---
 vnext/src/ui/MessageInput.js | 39 +++++++++++++++++++++++++++------------
 vnext/src/ui/Post.js         | 30 +++++++++++++++++++++++-------
 2 files changed, 50 insertions(+), 19 deletions(-)

diff --git a/vnext/src/ui/MessageInput.js b/vnext/src/ui/MessageInput.js
index a746ba08..63c2ee79 100644
--- a/vnext/src/ui/MessageInput.js
+++ b/vnext/src/ui/MessageInput.js
@@ -1,8 +1,6 @@
 import React, { useState, useEffect, useRef } from 'react';
 import PropTypes from 'prop-types';
 
-import { useFormState } from 'react-use-form-state';
-
 import { MessageType } from './Types';
 
 import Icon from './Icon';
@@ -10,6 +8,19 @@ import Button from './Button';
 
 import UploadButton from './UploadButton';
 
+
+// StackOverflow-driven development: https://stackoverflow.com/a/10158364/1097384
+function moveCaretToEnd(el) {
+    if (typeof el.selectionStart == 'number') {
+        el.selectionStart = el.selectionEnd = el.value.length;
+    } else if (typeof el.createTextRange != 'undefined') {
+        el.focus();
+        var range = el.createTextRange();
+        range.collapse(false);
+        range.select();
+    }
+}
+
 export default function MessageInput({ text, data, rows, children, onSend }) {
     let textareaRef = useRef();
     let fileinput = useRef();
@@ -18,28 +29,33 @@ export default function MessageInput({ text, data, rows, children, onSend }) {
         const isDesktop = window.matchMedia('(min-width: 62.5rem)');
         if (isDesktop.matches) {
             textareaRef.current.focus();
+            moveCaretToEnd(textareaRef.current);
         }
     };
     useEffect(() => {
-        textChanged();
+        textChanged({
+            target: {
+                value: text
+            }
+        });
         updateFocus();
-    }, []);
+    }, [text]);
+
+    let [body, setBody] = useState(text);
 
     let handleCtrlEnter = (event) => {
         if (event.ctrlKey && (event.charCode == 10 || event.charCode == 13)) {
             onSubmit({});
         }
     };
-    let textChanged = (event) => {
+    const textChanged = (event) => {
+        setBody(event.target.value);
         const el = textareaRef.current;
         const offset = el.offsetHeight - el.clientHeight;
         const height = el.scrollHeight + offset;
         el.style.height = `${height + offset}px`;
     };
     const [attach, setAttach] = useState('');
-    const [formState, { textarea }] = useFormState({
-        body: text
-    });
     let uploadValueChanged = (attach) => {
         setAttach(attach);
     };
@@ -51,12 +67,12 @@ export default function MessageInput({ text, data, rows, children, onSend }) {
         onSend({
             mid: data.mid,
             rid: data.rid || 0,
-            body: formState.values.body,
+            body: body,
             attach: attach ? input.files[0] : '',
             to: data.to || {}
         });
         setAttach('');
-        formState.clearField('body');
+        setBody('');
         textareaRef.current.style.height = '';
         updateFocus();
     };
@@ -65,7 +81,7 @@ export default function MessageInput({ text, data, rows, children, onSend }) {
             <div style={commentStyle}>
                 <textarea onChange={textChanged} onKeyPress={handleCtrlEnter}
                     ref={textareaRef} style={textInputStyle}
-                    rows={rows || '1'} placeholder={children} {...textarea('body')} />
+                    rows={rows || '1'} placeholder={children} value={body} />
                 <div style={inputBarStyle}>
                     <UploadButton inputRef={fileinput} value={attach} onChange={uploadValueChanged} />
                     <Button onClick={onSubmit}><Icon name="ei-envelope" size="s" />Send</Button>
@@ -78,7 +94,6 @@ export default function MessageInput({ text, data, rows, children, onSend }) {
 const commentStyle = {
     display: 'flex',
     flexDirection: 'column',
-    borderTop: '1px #eee solid',
     width: '100%',
     marginTop: '10px'
 };
diff --git a/vnext/src/ui/Post.js b/vnext/src/ui/Post.js
index dc1c7a9d..662f9f78 100644
--- a/vnext/src/ui/Post.js
+++ b/vnext/src/ui/Post.js
@@ -1,16 +1,18 @@
-import React, { memo } from 'react';
+import React, { useState } from 'react';
 
 import ReactRouterPropTypes from 'react-router-prop-types';
 import { UserType } from './Types';
 
 import qs from 'qs';
 
+import Button from './Button';
 import MessageInput from './MessageInput';
 
 import { post, update } from '../api';
 
-function PostComponent({ location, visitor, history }) {
+export default function Post({ location, visitor, history }) {
   let draftMessage = (location.state || {}).draft || {};
+  let [draft, setDraft] = useState(draftMessage.body);
   let params = qs.parse(window.location.search.substring(1));
   let postMessage = (template) => {
     const { attach, body } = template;
@@ -23,18 +25,32 @@ function PostComponent({ location, visitor, history }) {
         }
       }).catch(console.log);
   };
+  let appendTag = (tag) => {
+    setDraft(prevDraft => {
+      return `${prevDraft || ''} *${tag} `;
+    });
+  };
   return (
     <div className="msg-cont">
-      <MessageInput rows="7" text={params.body || draftMessage.body || ''} data={{ mid: 0, timestamp: '0' }} onSend={postMessage}>
+      <MessageInput rows="7" text={params.body || draft || ''} data={{ mid: 0, timestamp: '0' }} onSend={postMessage}>
         *weather It is very cold today!
-          </MessageInput>
+      </MessageInput>
+      {
+        visitor.tagStats &&
+        <div style={{ padding: '6px' }}>
+          <p>Tags:</p>
+          {
+            visitor.tagStats.map(t => {
+              return (<Button key={t.tag} onClick={() => { appendTag(t.tag); }}>{t.tag}</Button>);
+            })
+          }
+        </div>
+      }
     </div>
   );
 }
 
-export default memo(PostComponent);
-
-PostComponent.propTypes = {
+Post.propTypes = {
   location: ReactRouterPropTypes.location,
   history: ReactRouterPropTypes.history.isRequired,
   visitor: UserType
-- 
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