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import { BSONValue } from './bson_value';
import type { EJSONOptions } from './extended_json';
/** @public */
export interface DoubleExtended {
$numberDouble: string;
}
/**
* A class representation of the BSON Double type.
* @public
* @category BSONType
*/
export class Double extends BSONValue {
get _bsontype(): 'Double' {
return 'Double';
}
value!: number;
/**
* Create a Double type
*
* @param value - the number we want to represent as a double.
*/
constructor(value: number) {
super();
if ((value as unknown) instanceof Number) {
value = value.valueOf();
}
this.value = +value;
}
/**
* Access the number value.
*
* @returns returns the wrapped double number.
*/
valueOf(): number {
return this.value;
}
toJSON(): number {
return this.value;
}
toString(radix?: number): string {
return this.value.toString(radix);
}
/** @internal */
toExtendedJSON(options?: EJSONOptions): number | DoubleExtended {
if (options && (options.legacy || (options.relaxed && isFinite(this.value)))) {
return this.value;
}
if (Object.is(Math.sign(this.value), -0)) {
// NOTE: JavaScript has +0 and -0, apparently to model limit calculations. If a user
// explicitly provided `-0` then we need to ensure the sign makes it into the output
return { $numberDouble: '-0.0' };
}
return {
$numberDouble: Number.isInteger(this.value) ? this.value.toFixed(1) : this.value.toString()
};
}
/** @internal */
static fromExtendedJSON(doc: DoubleExtended, options?: EJSONOptions): number | Double {
const doubleValue = parseFloat(doc.$numberDouble);
return options && options.relaxed ? doubleValue : new Double(doubleValue);
}
/** @internal */
[Symbol.for('nodejs.util.inspect.custom')](): string {
return this.inspect();
}
inspect(): string {
const eJSON = this.toExtendedJSON() as DoubleExtended;
return `new Double(${eJSON.$numberDouble})`;
}
}
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