convert
Version:
The smallest & fastest library for really easy, totally type-safe unit conversions in TypeScript & JavaScript
55 lines • 6.67 kB
JavaScript
import { convert } from "./convert.js";
const splitExpression = /(-?(?:\d+)?\.?\d+)\s?(\S+)/g;
function to(unit, kind) {
const isBest = unit === 'best';
let result = 0;
let resolvedUnit;
let isFirstPass = true;
do {
const converted = convert(Number(this._search[1]), this._search[2]).to(
// biome-ignore lint/style/noNonNullAssertion: isBest and not isFirstPass implies resolvedUnit
(isBest && !isFirstPass ? resolvedUnit : unit));
if (isBest && isFirstPass) {
result += converted.quantity;
resolvedUnit = converted.unit;
isFirstPass = false;
}
else {
result += converted;
}
// biome-ignore lint/style/noNonNullAssertion: do while loop implies this._search is not null
this._search = splitExpression.exec(this._value);
} while (this._search);
if (isBest) {
// biome-ignore lint/style/noNonNullAssertion: isBest implies resolvedUnit
return convert(result, resolvedUnit).to('best', kind);
}
return result;
}
/**
* Convert several values in a string into a single unit.
*
* @example
* ```ts
* convertMany('1d 12h').to('hours') === 36;
* ```
*
* @param value - The string to parse as values
*
* @public
*/
export function convertMany(value) {
splitExpression.lastIndex = 0;
const search = splitExpression.exec(value);
if (!search) {
throw new RangeError(`value did not match expression ${splitExpression.source}`);
}
// eslint-disable-next-line @typescript-eslint/consistent-type-assertions
return {
to: to.bind({
_search: search,
_value: value,
}),
};
}
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