shellphone.app/app/messages/components/conversation.tsx
2021-08-30 08:34:37 +08:00

86 lines
2.9 KiB
TypeScript

import { Suspense, useEffect, useMemo, useRef } from "react";
import { useRouter } from "blitz";
import clsx from "clsx";
import { Direction } from "../../../db";
import useConversation from "../hooks/use-conversation";
import NewMessageArea from "./new-message-area";
export default function Conversation() {
const router = useRouter();
const recipient = decodeURIComponent(router.params.recipient);
const conversation = useConversation(recipient)[0];
const messages = useMemo(() => conversation?.messages ?? [], [conversation?.messages]);
const messagesListRef = useRef<HTMLUListElement>(null);
useEffect(() => {
messagesListRef.current?.querySelector("li:last-child")?.scrollIntoView();
}, [messages, messagesListRef]);
return (
<>
<div className="flex flex-col space-y-6 p-6 pt-12 pb-16">
<ul ref={messagesListRef}>
{messages.length === 0 ? "empty state" : null}
{messages.map((message, index) => {
const isOutbound = message.direction === Direction.Outbound;
const nextMessage = messages![index + 1];
const previousMessage = messages![index - 1];
const isNextMessageFromSameSender = message.from === nextMessage?.from;
const isPreviousMessageFromSameSender = message.from === previousMessage?.from;
const messageSentAt = new Date(message.sentAt);
const previousMessageSentAt = previousMessage ? new Date(previousMessage.sentAt) : null;
const quarter = Math.floor(messageSentAt.getMinutes() / 15);
const sameQuarter =
previousMessage &&
messageSentAt.getTime() - previousMessageSentAt!.getTime() < 15 * 60 * 1000 &&
quarter === Math.floor(previousMessageSentAt!.getMinutes() / 15);
const shouldGroupMessages = previousMessageSentAt && sameQuarter;
return (
<li key={message.id}>
{(!isPreviousMessageFromSameSender || !shouldGroupMessages) && (
<div className="flex py-2 space-x-1 text-xs justify-center">
<strong>
{new Date(message.sentAt).toLocaleDateString("en-US", {
weekday: "long",
day: "2-digit",
month: "short",
})}
</strong>
<span>
{new Date(message.sentAt).toLocaleTimeString("en-US", {
hour: "2-digit",
minute: "2-digit",
})}
</span>
</div>
)}
<div
className={clsx(
isNextMessageFromSameSender ? "pb-1" : "pb-2",
isOutbound ? "text-right" : "text-left",
)}
>
<span
className={clsx(
"inline-block text-left w-[fit-content] p-2 rounded-lg text-white",
isOutbound ? "bg-[#3194ff] rounded-br-none" : "bg-black rounded-bl-none",
)}
>
{message.content}
</span>
</div>
</li>
);
})}
</ul>
</div>
<Suspense fallback={null}>
<NewMessageArea recipient={recipient} />
</Suspense>
</>
);
}