ThreadCount
7d650e4c10
Uniform stock management for healthcare linen rooms: the coordinator app, the phone counter and the staff app, for your own server. Built from d947f89 on 2026-09-15. Licensed under the Functional Source License (FSL-1.1-ALv2).
86 lines
3.3 KiB
TypeScript
86 lines
3.3 KiB
TypeScript
"use client";
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/* What a scan feels like.
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*
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* Counting a shelf is done looking at garments, not at the phone, so every scan has to confirm
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* itself physically. There are two things worth saying, and they have to feel different:
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*
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* tick — read one, keep going.
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* reject — that code isn't on this shelf; look up.
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*
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* On the web that's `navigator.vibrate`. Inside the Android shell it isn't: the WebView only
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* honours navigator.vibrate when the app declares android.permission.VIBRATE, which arrives with
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* @capacitor/haptics — until this plugin was added the tick was silent on a real phone and only
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* the beep survived. Native also gets the platform's own haptic engine, which is a cleaner tap
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* than a raw motor pulse.
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*
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* Settings can turn the lot off; the beep and the buzz share one switch because they are one
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* signal wearing two coats. */
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import { isNative } from "@/lib/nativescan";
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type HapticsModule = {
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Haptics: {
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impact: (o: { style: string }) => Promise<void>;
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notification: (o: { type: string }) => Promise<void>;
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};
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ImpactStyle: { Light: string; Medium: string; Heavy: string };
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NotificationType: { Success: string; Warning: string; Error: string };
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};
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let mod: HapticsModule | null = null;
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let loading: Promise<HapticsModule | null> | null = null;
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/** Dynamically imported: most people meet /m in a browser, where none of this ships. */
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function load(): Promise<HapticsModule | null> {
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if (!isNative()) return Promise.resolve(null);
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if (mod) return Promise.resolve(mod);
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if (!loading) {
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loading = import("@capacitor/haptics")
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.then((m) => (mod = m as unknown as HapticsModule))
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.catch(() => null); // shell built without the plugin — the web path still works
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}
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return loading;
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}
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/** Honours the Settings switch, and survives a browser that blocks storage entirely. */
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function wanted(): boolean {
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try { return localStorage.getItem("tc.beep") !== "0"; } catch { return true; }
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}
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function buzz(pattern: number | number[]) {
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try { navigator.vibrate?.(pattern); } catch { /* not every device has a motor */ }
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}
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function beep(hz: number, seconds: number, gain = 0.05) {
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try {
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const AC = window as unknown as { AudioContext?: typeof AudioContext; webkitAudioContext?: typeof AudioContext };
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const Ctor = AC.AudioContext || AC.webkitAudioContext;
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if (!Ctor) return;
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const ctx = new Ctor();
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const o = ctx.createOscillator(), g = ctx.createGain();
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o.frequency.value = hz; g.gain.value = gain;
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o.connect(g); g.connect(ctx.destination);
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o.start(); o.stop(ctx.currentTime + seconds);
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setTimeout(() => ctx.close().catch(() => {}), seconds * 1000 + 200);
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} catch { /* audio is blocked until a gesture — the haptic still fires */ }
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}
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/** One garment read. Short and high, so a shelf of them doesn't become a drone. */
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export function scanTick() {
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if (!wanted()) return;
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void load().then((m) => {
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if (m) m.Haptics.impact({ style: m.ImpactStyle.Light }).catch(() => {});
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else buzz(35);
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});
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beep(1180, 0.06);
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}
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/** That code doesn't belong here. Two longer pulses and a lower note — unmistakably not a tick. */
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export function scanReject() {
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if (!wanted()) return;
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void load().then((m) => {
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if (m) m.Haptics.notification({ type: m.NotificationType.Warning }).catch(() => {});
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else buzz([50, 60, 50]);
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});
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beep(320, 0.16, 0.06);
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}
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