37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
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import { formatCurrency, getCurrencySymbol } from '@angular/common';
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import { Inject, LOCALE_ID, Pipe, PipeTransform } from '@angular/core';
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@Pipe({
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name: 'fiatShortener'
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})
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export class FiatShortenerPipe implements PipeTransform {
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constructor(
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@Inject(LOCALE_ID) public locale: string
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) {}
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transform(num: number, ...args: any[]): unknown {
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const digits = args[0] || 1;
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const unit = args[1] || undefined;
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if (num < 1000) {
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return num.toFixed(digits);
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}
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const lookup = [
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{ value: 1, symbol: '' },
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{ value: 1e3, symbol: 'k' },
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{ value: 1e6, symbol: 'M' },
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{ value: 1e9, symbol: 'G' },
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{ value: 1e12, symbol: 'T' },
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{ value: 1e15, symbol: 'P' },
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{ value: 1e18, symbol: 'E' }
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];
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const rx = /\.0+$|(\.[0-9]*[1-9])0+$/;
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const item = lookup.slice().reverse().find((item) => num >= item.value);
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let result = item ? (num / item.value).toFixed(digits).replace(rx, '$1') : '0';
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result = formatCurrency(parseInt(result, 10), this.locale, getCurrencySymbol('USD', 'narrow'), 'USD', '1.0-0');
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return result + item.symbol;
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}
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}
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