76 lines
3.5 KiB
TypeScript
76 lines
3.5 KiB
TypeScript
import { useEffect, useRef } from "react";
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import { api } from "../api";
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import { FeedbackBanner, FreshnessBanner, LoadingState } from "../components/Feedback";
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import { usePollingResource } from "../hooks/usePollingResource";
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import { formatCallAnnouncement, isTimestampStale } from "../lib/format";
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import type { CallBatchDto } from "../types";
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import { DisplayCenter } from "./AdminPage";
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function projectCurrentBatch(value: unknown): CallBatchDto | null {
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return value && typeof value === "object" ? value as CallBatchDto : null;
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}
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export function PublicDisplayCenterPage() {
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const resource = usePollingResource((signal) => api.displayOverview(signal), { intervalMs: 5_000 });
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const data = resource.data;
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const stale = Boolean(data) && isTimestampStale(resource.lastClientSuccessAt, 30_000);
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const lastCallsRef = useRef<Map<string, string | null> | null>(null);
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useEffect(() => {
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if (!data) return;
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const previousCalls = lastCallsRef.current;
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const nextCalls = new Map<string, string | null>();
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const announcements: string[] = [];
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for (const project of data.projects) {
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const batch = projectCurrentBatch(project.current_batch);
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const key = batch ? `${batch.batch_number}:${batch.called_at ?? ""}` : null;
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nextCalls.set(project.id, key);
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if (!previousCalls?.has(project.id) || !key || previousCalls.get(project.id) === key) continue;
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const announcement = formatCallAnnouncement(batch);
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if (announcement) announcements.push(`${project.name}，${announcement}`);
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}
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lastCallsRef.current = nextCalls;
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if (
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!announcements.length
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|| !("speechSynthesis" in window)
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|| typeof SpeechSynthesisUtterance === "undefined"
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) return;
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window.speechSynthesis.cancel();
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for (const announcement of announcements) {
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const utterance = new SpeechSynthesisUtterance(announcement);
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utterance.lang = "zh-CN";
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utterance.rate = 0.9;
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window.speechSynthesis.speak(utterance);
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}
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}, [data]);
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return (
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<div className="app-shell app-shell--admin app-shell--no-primary-action">
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<a className="skip-link" href="#main-content">跳到主要内容</a>
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<header className="app-header">
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<div className="brand-lockup" aria-label="景区排队叫号系统">
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<span className="brand-logo-frame" aria-hidden="true"><img className="brand-logo" src="/xiaoqikong-logo.jpg" alt="" /></span>
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<span className="brand-lockup__text"><strong>景区排队叫号系统</strong></span>
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</div>
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<div className="account-menu"><span><strong>大屏中心</strong></span></div>
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</header>
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<main id="main-content" className="app-main">
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<section className="admin-content" aria-label="公开大屏内容">
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{resource.loading && !data ? <LoadingState label="正在汇总项目状态" /> : null}
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{resource.error && !data ? (
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<FeedbackBanner tone="danger" title="大屏数据暂时不可用" action={<button className="button button--secondary button--small" onClick={resource.refresh}>重试</button>}>
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{resource.error.message}
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</FeedbackBanner>
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) : null}
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{data ? (
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<>
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<FreshnessBanner offline={resource.offline} stale={stale} timestamp={resource.lastClientSuccessAt} refreshing={resource.refreshing} errorMessage={resource.error?.message} onRetry={resource.refresh} />
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<DisplayCenter projects={data.projects} />
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</>
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) : null}
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</section>
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</main>
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</div>
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);
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}
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