訊息 React 元件

/* eslint-disable react/no-array-index-key */
import { React, useState, useRef, useEffect } from 'react';
import {
  Page,
  Navbar,
  NavbarBackLink,
  Messagebar,
  Messages,
  Message,
  MessagesTitle,
  Link,
  Icon,
} from 'konsta/react';
import { CameraFill, ArrowUpCircleFill } from 'framework7-icons/react';
import { MdCameraAlt, MdSend } from 'react-icons/md';

export default function MessagesPage() {
  const [messageText, setMessageText] = useState('');
  const [messagesData, setMessagesData] = useState([
    {
      type: 'sent',
      text: 'Hi, Kate',
    },
    {
      type: 'sent',
      text: 'How are you?',
    },
    {
      name: 'Kate',
      type: 'received',
      text: 'Hi, I am good!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Blue Ninja',
      type: 'received',
      text: 'Hi there, I am also fine, thanks! And how are you?',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
    {
      type: 'sent',
      text: 'Hey, Blue Ninja! Glad to see you ;)',
    },
    {
      type: 'sent',
      text: 'How do you feel about going to the movies today?',
    },
    {
      name: 'Kate',
      type: 'received',
      text: ' Oh, great idea!',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Kate',
      type: 'received',
      text: ' What cinema are we going to?',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg',
    },
    {
      name: 'Blue Ninja',
      type: 'received',
      text: 'Great. And what movie?',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
    {
      name: 'Blue Ninja',
      type: 'received',
      text: 'What time?',
      avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg',
    },
  ]);

  const pageRef = useRef();
  const initiallyScrolled = useRef(false);

  const scrollToBottom = () => {
    const pageElement = pageRef.current.current || pageRef.current.el;
    pageElement.scrollTo({
      top: pageElement.scrollHeight - pageElement.offsetHeight,
      behavior: initiallyScrolled.current ? 'smooth' : 'auto',
    });
  };

  useEffect(() => {
    scrollToBottom();
    initiallyScrolled.current = true;
  }, [messagesData]);

  const handleSendClick = () => {
    const text = messageText.replace(/
/g, '<br>').trim();
    const type = 'sent';
    const messagesToSend = [];
    if (text.length) {
      messagesToSend.push({
        text,
        type,
      });
    }
    if (messagesToSend.length === 0) {
      return;
    }
    setMessagesData([...messagesData, ...messagesToSend]);
    setMessageText('');
  };

  const inputOpacity = messageText ? 1 : 0.3;
  const isClickable = messageText.trim().length > 0;

  const currentDate = new Intl.DateTimeFormat('en-US', {
    weekday: 'long',
    month: 'short',
    day: 'numeric',
    hour12: false,
    hour: '2-digit',
    minute: '2-digit',
  })
    .formatToParts(new Date())
    .map((part) => {
      if (['weekday', 'month', 'day'].includes(part.type)) {
        return <b key={part.type}>{part.value}</b>;
      }
      return part.value;
    });

  return (
    <Page className="ios:bg-white ios:dark:bg-black" ref={pageRef}>
      <Navbar
        title="Messages"
        />
      <Messages>
        <MessagesTitle>{currentDate}</MessagesTitle>
        {messagesData.map((message, index) => (
          <Message
            key={index}
            type={message.type}
            name={message.name}
            text={message.text}
            avatar={
              message.type === 'received' && (
                <img
                  alt="avatar"
                  src={message.avatar}
                  className="w-8 h-8 rounded-full"
                />
              )
            }
          />
        ))}
      </Messages>
      <Messagebar
        placeholder="Message"
        value={messageText}
        onInput={(e) => setMessageText(e.target.value)}
        left={
          <Link onClick={() => console.log('click')} toolbar iconOnly>
            <Icon
              ios={<CameraFill className="w-7 h-7" />}
              material={
                <MdCameraAlt className="w-6 h-6 fill-black dark:fill-md-dark-on-surface" />
              }
            />
          </Link>
        }
        right={
          <Link
            onClick={isClickable ? handleSendClick : undefined}
            toolbar
            style={{
              opacity: inputOpacity,
              cursor: isClickable ? 'pointer' : 'default',
            }}
          >
            <Icon
              ios={<ArrowUpCircleFill className="w-7 h-7" />}
              material={
                <MdSend className="w-6 h-6 fill-black dark:fill-md-dark-on-surface" />
              }
            />
          </Link>
        }
      />
    </Page>
  );
}