44 lines
2.7 KiB
TypeScript
44 lines
2.7 KiB
TypeScript
import { formatDateTime, formatTime } from "@/shared/utils/date-time";
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const zonedTime = /(?<![\w/+:.-])(\d{4}-\d{2}-\d{2})[T ](\d{2}:\d{2}(?::\d{2}(?:\.\d{1,9})?)?)(Z|[+-]\d{2}:\d{2})(?![\w:+/-])/g;
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const utcMarker = String.raw`(?:Z|(?:[（(]\s*)?UTC(?:\s*\+?0(?::00)?)?(?:\s*[）)])?)(?![\w:+/-])`;
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const utcRange = new RegExp(String.raw`(?<![\w/+:.-])(?:(\d{4}-\d{2}-\d{2})[T ])?(\d{2}:\d{2})\s*[–—~至-]\s*(\d{2}:\d{2})\s*${utcMarker}`, "g");
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const utcPoint = new RegExp(String.raw`(?<![\w/+:.-])(?:(\d{4}-\d{2}-\d{2})[T ])?(\d{2}:\d{2}(?::\d{2}(?:\.\d{1,9})?)?)\s*${utcMarker}`, "g");
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function parseTime(day: string, clock: string, zone = "Z"): number | null {
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const date = new Date(`${day}T00:00:00Z`);
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const [hours, minutes, seconds = "0"] = clock.split(":");
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if (!Number.isFinite(date.getTime()) || date.toISOString().slice(0, 10) !== day
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|| Number(hours) > 23 || Number(minutes) > 59 || Number(seconds) >= 60) return null;
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const value = Date.parse(`${day}T${clock}${zone}`);
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return Number.isFinite(value) ? value : null;
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}
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/** Display historical report prose without changing stored facts, IDs, URLs or code. */
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export function formatDisplayText(text: string | null | undefined): string {
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if (!text) return text ?? "";
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return text.split(/(https?:\/\/\S+|tjwater:\/\/\S+|`[^`]*`)/g).map((part, index) => {
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if (index % 2) return part;
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return part.replace(utcRange, (original, day: string | undefined, start: string, end: string) => {
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const startAt = parseTime(day ?? "2000-01-01", start);
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let endAt = parseTime(day ?? "2000-01-01", end);
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if (startAt === null || endAt === null) return original;
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if (endAt < startAt) endAt += 24 * 60 * 60_000;
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const dateOptions = { year: "numeric", month: "numeric", day: "numeric" } as const;
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const crossesDay = formatDateTime(startAt, dateOptions) !== formatDateTime(endAt, dateOptions);
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const startLabel = day ? formatDateTime(startAt, { ...dateOptions, hour: "2-digit", minute: "2-digit" }) : formatTime(startAt);
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const endLabel = crossesDay && day
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? formatDateTime(endAt, { ...dateOptions, hour: "2-digit", minute: "2-digit" })
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: `${crossesDay ? "次日 " : ""}${formatTime(endAt)}`;
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return `${startLabel}–${endLabel}（UTC+8）`;
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}).replace(zonedTime, (original, day: string, clock: string, zone: string) => {
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const value = parseTime(day, clock, zone);
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return value === null ? original : `${formatDateTime(value)}（UTC+8）`;
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}).replace(utcPoint, (original, day: string | undefined, clock: string) => {
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const value = parseTime(day ?? "2000-01-01", clock);
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if (value === null) return original;
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return `${day ? formatDateTime(value) : formatTime(value)}（UTC+8）`;
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});
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}).join("");
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}
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