65 lines
2.0 KiB
TypeScript
65 lines
2.0 KiB
TypeScript
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import React, { useEffect, useRef, useState } from 'react';
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import { useAtomValue } from 'jotai';
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import { Box, Text, config } from 'folds';
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import { roomIdToMsgDraftAtomFamily } from '../../state/room/roomInputDrafts';
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import { toPlainText } from '../../components/editor';
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import { DraftDot, DraftDotPulse, DraftIndicatorBase } from './DraftIndicator.css';
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const PULSE_DURATION = 600;
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type DraftIndicatorProps = {
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roomId: string;
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};
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/**
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* Subtle, non-distracting status shown near the composer when the current room
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* has a persisted (unsent) message draft. It reacts to the shared draft atom
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* (`roomIdToMsgDraftAtomFamily`) — the same source that backs the
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* `draft-msg-${roomId}` localStorage persistence — so it never introduces a
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* parallel persistence path.
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*
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* A short "Saved" pulse plays the moment a draft becomes persisted, then the
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* indicator settles into a quiet, muted resting state. The pulse is gated behind
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* `prefers-reduced-motion` in CSS, so motion-averse users only ever see the
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* static label.
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*/
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export function DraftIndicator({ roomId }: DraftIndicatorProps) {
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const draft = useAtomValue(roomIdToMsgDraftAtomFamily(roomId));
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// Real content, not just an empty paragraph.
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const hasDraft = toPlainText(draft, false).trim().length > 0;
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const [pulse, setPulse] = useState(false);
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const hadDraft = useRef(false);
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useEffect(() => {
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if (hasDraft && !hadDraft.current) {
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hadDraft.current = true;
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setPulse(true);
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const timeout = setTimeout(() => setPulse(false), PULSE_DURATION);
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return () => clearTimeout(timeout);
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}
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hadDraft.current = hasDraft;
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return undefined;
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}, [hasDraft]);
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if (!hasDraft) return null;
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return (
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<Box
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className={DraftIndicatorBase}
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as="span"
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shrink="No"
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alignItems="Center"
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gap="200"
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style={{ padding: `0 ${config.space.S100}` }}
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aria-hidden
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>
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<span className={`${DraftDot}${pulse ? ` ${DraftDotPulse}` : ''}`} />
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<Text as="span" size="T200" priority="300">
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Draft saved
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</Text>
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</Box>
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);
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}
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