Kazuma
40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
import { Asset } from './Asset';
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import type { EtfData, EtfMetrics } from '../types/models.model';
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export class Etf extends Asset {
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metrics: EtfMetrics;
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constructor(data: EtfData) {
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super(data);
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// Preserve null for missing fields — coercing to 0 would auto-fail gates
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// in EtfScorer for data Yahoo simply didn't return.
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const num = (v: unknown): number | null => {
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if (v == null) return null;
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const f = parseFloat(String(v));
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return Number.isFinite(f) ? f : null;
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};
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this.metrics = {
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expenseRatio: num(data.expenseRatio),
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totalAssets: num(data.totalAssets),
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yield: num(data.yield),
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volume: num(data.volume),
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fiveYearReturn: num(data.fiveYearReturn),
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};
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}
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getDisplayMetrics(): Record<string, string> {
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const m = this.metrics;
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const fmt = (v: number | null, dec: number, suffix = '') =>
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v != null ? `${v.toFixed(dec)}${suffix}` : '—';
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return {
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Ticker: this.ticker,
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Type: 'ETF',
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Price: this.formatCurrency(this.currentPrice),
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'Exp Ratio%': fmt(m.expenseRatio, 2, '%'),
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'Yield%': fmt(m.yield, 2, '%'),
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AUM: m.totalAssets != null ? this.formatLargeNumber(m.totalAssets) : '—',
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'5Y Return%': fmt(m.fiveYearReturn, 1, '%'),
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};
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}
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}
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