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export function fmtCurrency(value?: number | null, decimals = 2): string {
if (value === null || value === undefined || Number.isNaN(value)) return "-";
return `$${value.toLocaleString(undefined, { maximumFractionDigits: decimals, minimumFractionDigits: decimals })}`;
}
export function fmtNumber(value?: number | null, decimals = 2): string {
if (value === null || value === undefined || Number.isNaN(value)) return "-";
return value.toLocaleString(undefined, { maximumFractionDigits: decimals, minimumFractionDigits: decimals });
}
export function fmtLarge(value?: number | null): string {
if (value === null || value === undefined || Number.isNaN(value)) return "-";
const abs = Math.abs(value);
const sign = value < 0 ? "-" : "";
if (abs >= 1e12) return `${sign}$${(abs / 1e12).toFixed(2)}T`;
if (abs >= 1e9) return `${sign}$${(abs / 1e9).toFixed(2)}B`;
if (abs >= 1e6) return `${sign}$${(abs / 1e6).toFixed(1)}M`;
return `${sign}$${abs.toLocaleString(undefined, { maximumFractionDigits: 0 })}`;
}
export function fmtPct(value?: number | null, decimals = 2, signed = false): string {
if (value === null || value === undefined || Number.isNaN(value)) return "-";
const pct = value * 100;
const sign = signed && pct > 0 ? "+" : "";
return `${sign}${pct.toFixed(decimals)}%`;
}
export function deltaClass(value?: number | null): string {
if (value === null || value === undefined) return "neutral";
return value >= 0 ? "positive" : "negative";
}
export function formatNewsTimestamp(iso: string): { display: string; iso: string } {
const date = new Date(iso);
const now = new Date();
const tz: Intl.DateTimeFormatOptions = { timeZone: "America/Los_Angeles" };
const diffMs = now.getTime() - date.getTime();
const diffMins = Math.floor(diffMs / 60_000);
const diffHours = Math.floor(diffMs / 3_600_000);
if (diffMins < 1) {
return { display: "Just now", iso };
}
if (diffMins < 60) {
return { display: `${diffMins}m ago`, iso };
}
if (diffHours < 24) {
return { display: `${diffHours}h ago`, iso };
}
const inTz = (options: Intl.DateTimeFormatOptions) =>
date.toLocaleString("en-US", { ...options, ...tz });
if (diffHours < 48) {
const time = inTz({ hour: "numeric", minute: "2-digit" });
return { display: `Yesterday ${time}`, iso };
}
const yearNow = Number(now.toLocaleString("en-US", { year: "numeric", ...tz }));
const yearDate = Number(inTz({ year: "numeric" }));
if (yearDate === yearNow) {
return { display: inTz({ month: "short", day: "numeric" }), iso };
}
return { display: inTz({ month: "short", day: "numeric", year: "numeric" }), iso };
}
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