1import { useState } from "preact/hooks";2import { settleUiMutation } from "@nzip/lofi";3import {4 type BootProgress,5 useBootProgress,6 usePendingWrites,7 useSyncStatus,8} from "@nzip/lofi/preact";9import {10 type Incident,11 type IncidentStatus,12 type Severity,13 useIncidentNotice,14 useIncidents,15} from "./use-incidents.ts";1617// A cold first visit waits on the engine download, not on storage; name the18// wait it is actually in, with byte progress while the download runs.19function loadingLabel(boot: BootProgress): string {20 if (boot.phase !== "downloading") return "Opening persistent storage…";21 const mb = (bytes: number) => (bytes / (1024 * 1024)).toFixed(1);22 return boot.totalBytes === null23 ? `Downloading the app · ${mb(boot.loadedBytes)} MB…`24 : `Downloading the app · ${mb(boot.loadedBytes)} of ${mb(boot.totalBytes)} MB…`;25}2627const SEVERITIES: readonly Severity[] = ["smolder", "burn", "melt"];2829const COLUMNS: readonly { status: IncidentStatus; title: string }[] = [30 { status: "burning", title: "Burning" },31 { status: "contained", title: "Contained" },32 { status: "out", title: "Out" },33];3435const MOVES: Record<IncidentStatus, readonly { to: IncidentStatus; label: string }[]> = {36 burning: [{ to: "contained", label: "Contain" }, { to: "out", label: "Extinguish" }],37 contained: [{ to: "out", label: "Extinguish" }, { to: "burning", label: "Flare up" }],38 out: [{ to: "burning", label: "Reignite" }],39};4041function openedLabel(value: Incident["openedAt"]): string {42 const opened = value instanceof Date ? value : new Date(String(value));43 return opened.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" });44}4546/**47 * Author-owned demo UI: one island over one encrypted table, structured as a48 * three-state board. Reporting goes through a verb with effects; moving an49 * incident between states goes through a plain verb; every row carries its50 * real sync fate.51 */52export default function IncidentBoard() {53 const { status, error, durability, incidents, failureKind, report, setStatus } = useIncidents();54 const notice = useIncidentNotice();55 const pending = usePendingWrites();56 const boot = useBootProgress();57 const [title, setTitle] = useState("");58 const [severity, setSeverity] = useState<Severity>("burn");5960 return (61 <section id="incidents" class="board" data-island="incidents">62 <form63 onSubmit={(event) => {64 event.preventDefault();65 const next = title.trim();66 if (!next) return;67 setTitle("");68 // The verb's handle is thenable: settled here at saved, while the69 // sync fate and its effects continue in the background.70 void settleUiMutation(report(next, severity));71 }}72 >73 <label for="new-incident">New incident</label>74 <div class="composer">75 <input76 id="new-incident"77 value={title}78 onInput={(event) => setTitle(event.currentTarget.value)}79 autocomplete="off"80 />81 <select82 aria-label="Severity"83 value={severity}84 onChange={(event) => setSeverity(event.currentTarget.value as Severity)}85 >86 {SEVERITIES.map((option) => <option key={option} value={option}>{option}</option>)}87 </select>88 <button type="submit">Report</button>89 </div>90 </form>91 <p class="state" role="status">92 {status === "loading" && loadingLabel(boot)}93 {status === "error" &&94 `${failureKind === "read" ? "Read failed" : "Write failed"}: ${error}`}95 {status === "ready" && `${incidents.length} incident(s) · ${96 durability === "global"97 ? "confirmed by the store"98 : durability === "local"99 ? "saved on this device"100 : durability === "failed"101 ? "write declined"102 : "ready"103 }`}104 </p>105 {pending.count > 0 && (106 <p class="state" data-pending-writes={pending.count}>107 {pending.count} change{pending.count === 1 ? "" : "s"} waiting to sync108 </p>109 )}110 {notice && (111 <p class="state" role="status" data-notice={notice.kind}>112 {notice.text}113 </p>114 )}115 <div class="columns">116 {COLUMNS.map((column) => {117 const rows = incidents.filter((incident) => incident.status === column.status);118 return (119 <section key={column.status} class="column" data-status={column.status}>120 <h2>121 {column.title} <span class="count">{rows.length}</span>122 </h2>123 {rows.length === 0124 ? <p class="state column-empty">clear</p>125 : (126 <ul aria-label={column.title}>127 {rows.map((incident) => (128 <IncidentItem key={incident.id} incident={incident} setStatus={setStatus} />129 ))}130 </ul>131 )}132 </section>133 );134 })}135 </div>136 </section>137 );138}139140function IncidentItem(141 { incident, setStatus }: {142 incident: Incident;143 setStatus: (id: string, status: IncidentStatus) => PromiseLike<unknown>;144 },145) {146 const syncStatus = useSyncStatus(incident);147 return (148 <li class={`incident sev-${incident.severity}`}>149 <div class="incident-head">150 <span class="incident-title">{incident.title}</span>151 <span class="incident-meta">152 {incident.severity} · {openedLabel(incident.openedAt)}153 </span>154 </div>155 <div class="incident-actions">156 {MOVES[incident.status].map((move) => (157 <button158 key={move.to}159 type="button"160 class="move"161 onClick={() => void settleUiMutation(setStatus(incident.id, move.to))}162 >163 {move.label}164 </button>165 ))}166 {syncStatus !== "synced" && (167 <span class="state" data-sync-status={syncStatus}>168 {syncStatus === "waiting" ? "waiting to sync" : "declined"}169 </span>170 )}171 </div>172 </li>173 );174}