43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
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/**
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* Utility functions for JSON.
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*/
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import { isJSONValue, JSONObject, JSONValue } from "../types";
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/**
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* Parses the given `string` and converts it into a {@link JSONValue}.
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*
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* For the string to be considered valid JSON it has to satisfy the requirements for {@link JSON.parse}.
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*
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* @param str - `string` to parse.
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* @returns The parsed integer JSON value.
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* @throws {@link SyntaxError} - If the given `string` does not represent a valid JSON value.
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*/
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export function parseJSON(str: string): JSONValue {
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const json = JSON.parse(str);
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if (!isJSONValue(json)) {
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throw new Error("Invalid JSON returned. Should never happen.");
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}
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return json;
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}
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/**
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* Removes `undefined` fields from the given JSON'ish object to make it a valid {@link JSONObject}.
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*
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* Note: This only happens for fields directly belonging to the given object. No recursive cleanup is performed.
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*
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* @param obj - Object to remove `undefined` fields from.
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* @returns Cleaned up JSON object.
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*/
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export function filterUndefinedFromJSON(obj: {
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[key: string]: JSONValue | undefined;
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}): JSONObject {
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const result: JSONObject = {};
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for (const [key, value] of Object.entries(obj)) {
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if (value !== undefined) {
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result[key] = value;
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}
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}
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return result;
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}
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