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51 lines
1.4 KiB
51 lines
1.4 KiB
3 months ago
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'use strict';
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const assert = require('assert');
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const BSON = require('bson');
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const isBsonType = require('../helpers/isBsonType');
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/**
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* Given a value, cast it to a IEEE 754-2008 floating point, or throw an `Error` if the value
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* cannot be casted. `null`, `undefined`, and `NaN` are considered valid inputs.
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*
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* @param {Any} value
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* @return {Number}
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* @throws {Error} if `value` does not represent a IEEE 754-2008 floating point. If casting from a string, see [BSON Double.fromString API documentation](https://mongodb.github.io/node-mongodb-native/Next/classes/BSON.Double.html#fromString)
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* @api private
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*/
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module.exports = function castDouble(val) {
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if (val == null || val === '') {
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return null;
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}
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let coercedVal;
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if (isBsonType(val, 'Long')) {
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coercedVal = val.toNumber();
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} else if (typeof val === 'string') {
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try {
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coercedVal = BSON.Double.fromString(val);
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return coercedVal;
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} catch {
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assert.ok(false);
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}
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} else if (typeof val === 'object') {
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const tempVal = val.valueOf() ?? val.toString();
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// ex: { a: 'im an object, valueOf: () => 'helloworld' } // throw an error
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if (typeof tempVal === 'string') {
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try {
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coercedVal = BSON.Double.fromString(val);
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return coercedVal;
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} catch {
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assert.ok(false);
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}
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} else {
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coercedVal = Number(tempVal);
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}
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} else {
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coercedVal = Number(val);
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}
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return new BSON.Double(coercedVal);
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};
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