255 lines
7.5 KiB
TypeScript
255 lines
7.5 KiB
TypeScript
/**
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* Parse a date string in yyyy-MM-dd format (assumed local) into a JS Date object.
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* No timezone conversion is applied. Returns a Date at midnight local time.
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*/
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export function parseLocalDate(input: string | Date): Date {
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if (input instanceof Date) {
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return new Date(input.getFullYear(), input.getMonth(), input.getDate());
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}
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if (typeof input === "string") {
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const dateString = input?.split("T")[0] ?? "";
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const parts = dateString.split("-");
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const [yearStr, monthStr, dayStr] = parts;
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// Validate all parts are defined and valid strings
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if (!yearStr || !monthStr || !dayStr) {
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throw new Error("Invalid date string format. Expected yyyy-MM-dd.");
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}
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const year = parseInt(yearStr, 10);
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const month = parseInt(monthStr, 10) - 1; // JS Date months are 0-based
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const day = parseInt(dayStr, 10);
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if (Number.isNaN(year) || Number.isNaN(month) || Number.isNaN(day)) {
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throw new Error("Invalid numeric values in date string.");
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}
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return new Date(year, month, day);
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}
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throw new Error(
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"Unsupported input to parseLocalDate. Expected string or Date."
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);
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}
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/**
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* Format a JS Date object as a `yyyy-MM-dd` string (in local time).
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* Useful for saving date-only data without time component.
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*/
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export function formatLocalDate(date: Date): string {
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const year = date.getFullYear(); // ← local time
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const month = `${date.getMonth() + 1}`.padStart(2, "0");
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const day = `${date.getDate()}`.padStart(2, "0");
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return `${year}-${month}-${day}`; // e.g. "2025-07-15"
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}
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/**
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* Get a Date object representing midnight UTC for a given local date.
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* Useful for comparing or storing dates consistently across timezones.
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*/
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export function toUTCDate(date: Date): Date {
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return new Date(
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Date.UTC(date.getFullYear(), date.getMonth(), date.getDate())
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);
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}
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// ---------- formatUTCDateStringToLocal ----------
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/**
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* If `dateStr` is:
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* - date-only "YYYY-MM-DD" -> returns it unchanged
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* - ISO instant/string -> returns the LOCAL calendar date "YYYY-MM-DD" of that instant
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*/
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export function formatUTCDateStringToLocal(dateStr: string): string {
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if (!dateStr) return "";
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if (isDateOnlyString(dateStr)) return dateStr;
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const d = new Date(dateStr);
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if (isNaN(d.getTime())) {
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// fallback: strip time part and treat as local date
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try {
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const maybe = parseLocalDate(dateStr);
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return formatLocalDate(maybe);
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} catch {
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return "";
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}
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}
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return formatLocalDate(d); // uses local fields of the instant
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}
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/**
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* Frontend-only normalizer.
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* - Returns "YYYY-MM-DD" string representing the calendar date the user expects.
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* - This avoids producing ISO instants that confuse frontend display.
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*
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* Use this for UI display or for sending date-only values to backend if backend accepts date-only.
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*/
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export function normalizeToISOString(date: Date | string): string {
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const parsed = parseLocalDate(date); // returns local-midnight-based Date
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return formatLocalDate(parsed); // "YYYY-MM-DD"
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}
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// ---------- helpers ----------
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const MONTH_SHORT = [
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"Jan",
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"Feb",
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"Mar",
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"Apr",
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"May",
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"Jun",
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"Jul",
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"Aug",
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"Sep",
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"Oct",
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"Nov",
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"Dec",
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];
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function isDateOnlyString(s: string): boolean {
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return /^\d{4}-\d{2}-\d{2}$/.test(s);
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}
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// ---------- formatDateToHumanReadable ----------
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/**
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* Frontend-safe: never lets timezone shift the displayed calendar day.
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* - "YYYY-MM-DD" strings are shown exactly.
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* - Date objects are shown using their calendar fields (getFullYear/getMonth/getDate).
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* - ISO/timestamp strings are parsed and shown using UTC date component so they do not flip on client TZ.
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*/
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export function formatDateToHumanReadable(dateInput?: string | Date): string {
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if (!dateInput) return "N/A";
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// date-only string -> show as-is
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if (typeof dateInput === "string" && isDateOnlyString(dateInput)) {
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const parts = dateInput.split("-");
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const [y, m, d] = parts;
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// Defensive check so TypeScript and runtime are both happy
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if (!y || !m || !d) {
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console.error("Invalid date-only string:", dateInput);
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return "Invalid Date";
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}
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const day = d.padStart(2, "0");
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const monthIndex = parseInt(m, 10) - 1;
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const monthName = MONTH_SHORT[monthIndex] ?? "Invalid";
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return `${day} ${monthName} ${y}`;
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}
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// Date object -> use its calendar fields (no TZ conversion)
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if (dateInput instanceof Date) {
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if (isNaN(dateInput.getTime())) return "Invalid Date";
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const dd = String(dateInput.getDate()).padStart(2, "0");
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const mm = MONTH_SHORT[dateInput.getMonth()];
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const yy = dateInput.getFullYear();
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return `${dd} ${mm} ${yy}`;
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}
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// Otherwise (ISO/timestamp string) -> parse and use UTC date components
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const parsed = new Date(dateInput);
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if (isNaN(parsed.getTime())) {
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console.error("Invalid date input provided:", dateInput);
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return "Invalid Date";
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}
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const dd = String(parsed.getUTCDate()).padStart(2, "0");
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const mm = MONTH_SHORT[parsed.getUTCMonth()];
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const yy = parsed.getUTCFullYear();
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return `${dd} ${mm} ${yy}`;
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}
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/**
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* Convert any OCR numeric-ish value into a number.
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* Handles string | number | null | undefined gracefully.
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*/
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export function toNum(val: string | number | null | undefined): number {
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if (val == null || val === "") return 0;
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if (typeof val === "number") return val;
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const parsed = Number(val);
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return isNaN(parsed) ? 0 : parsed;
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}
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/**
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* Convert any OCR string-like value into a safe string.
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*/
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export function toStr(val: string | number | null | undefined): string {
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if (val == null) return "";
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return String(val).trim();
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}
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/**
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* Convert OCR date strings like "070825" (MMDDYY) into a JS Date object.
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* Example: "070825" → 2025-08-07.
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*/
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export function convertOCRDate(
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input: string | number | null | undefined
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): Date {
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const raw = toStr(input);
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if (!/^\d{6}$/.test(raw)) {
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throw new Error(`Invalid OCR date format: ${raw}`);
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}
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const month = parseInt(raw.slice(0, 2), 10) - 1;
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const day = parseInt(raw.slice(2, 4), 10);
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const year2 = parseInt(raw.slice(4, 6), 10);
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const year = year2 < 50 ? 2000 + year2 : 1900 + year2;
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return new Date(year, month, day);
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}
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/**
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* Format a Date or date string into "HH:mm" (24-hour) string.
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*
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* Options:
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* - By default, hours/minutes are taken in local time.
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* - Pass { asUTC: true } to format using UTC hours/minutes.
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*
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* Examples:
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* formatLocalTime(new Date(2025, 6, 15, 9, 5)) → "09:05"
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* formatLocalTime("2025-07-15") → "00:00"
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* formatLocalTime("2025-07-15T14:30:00Z") → "20:30" (in +06:00)
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* formatLocalTime("2025-07-15T14:30:00Z", { asUTC:true }) → "14:30"
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*/
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export function formatLocalTime(
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d: Date | string | undefined,
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opts: { asUTC?: boolean } = {}
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): string {
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if (!d) return "";
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const { asUTC = false } = opts;
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const pad2 = (n: number) => n.toString().padStart(2, "0");
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let dateObj: Date;
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if (d instanceof Date) {
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if (isNaN(d.getTime())) return "";
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dateObj = d;
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} else if (typeof d === "string") {
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const raw = d.trim();
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const isDateOnly = /^\d{4}-\d{2}-\d{2}$/.test(raw);
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if (isDateOnly) {
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// Parse yyyy-MM-dd safely as local midnight
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try {
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dateObj = parseLocalDate(raw);
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} catch {
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dateObj = new Date(raw); // fallback
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}
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} else {
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// For full ISO/timestamp strings, let Date handle TZ
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dateObj = new Date(raw);
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}
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if (isNaN(dateObj.getTime())) return "";
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} else {
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return "";
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}
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const hours = asUTC ? dateObj.getUTCHours() : dateObj.getHours();
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const minutes = asUTC ? dateObj.getUTCMinutes() : dateObj.getMinutes();
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return `${pad2(hours)}:${pad2(minutes)}`;
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}
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