basant307/AI_Governance_Project

1import {codeFrameColumns} from '@babel/code-frame';2import indexToPosition from 'index-to-position';3 4const getCodePoint = character => `\\u{${character.codePointAt(0).toString(16)}}`;5 6export class JSONError extends Error {7	name = 'JSONError';8	fileName;9	#input;10	#jsonParseError;11	#message;12	#codeFrame;13	#rawCodeFrame;14 15	constructor(messageOrOptions) {16		// JSONError constructor used accept string17		// TODO[>=9]: Remove this `if` on next major version18		if (typeof messageOrOptions === 'string') {19			super();20			this.#message = messageOrOptions;21		} else {22			const {jsonParseError, fileName, input} = messageOrOptions;23			// We cannot pass message to `super()`, otherwise the message accessor will be overridden.24			// https://262.ecma-international.org/14.0/#sec-error-message25			super(undefined, {cause: jsonParseError});26 27			this.#input = input;28			this.#jsonParseError = jsonParseError;29			this.fileName = fileName;30		}31 32		Error.captureStackTrace?.(this, JSONError);33	}34 35	get message() {36		this.#message ??= `${addCodePointToUnexpectedToken(this.#jsonParseError.message)}${this.#input === '' ? ' while parsing empty string' : ''}`;37 38		const {codeFrame} = this;39		return `${this.#message}${this.fileName ? ` in ${this.fileName}` : ''}${codeFrame ? `\n\n${codeFrame}\n` : ''}`;40	}41 42	set message(message) {43		this.#message = message;44	}45 46	#getCodeFrame(highlightCode) {47		// TODO[>=9]: Remove this `if` on next major version48		if (!this.#jsonParseError) {49			return;50		}51 52		const input = this.#input;53 54		const location = getErrorLocation(input, this.#jsonParseError.message);55		if (!location) {56			return;57		}58 59		return codeFrameColumns(input, {start: location}, {highlightCode});60	}61 62	get codeFrame() {63		this.#codeFrame ??= this.#getCodeFrame(/* highlightCode */ true);64		return this.#codeFrame;65	}66 67	get rawCodeFrame() {68		this.#rawCodeFrame ??= this.#getCodeFrame(/* highlightCode */ false);69		return this.#rawCodeFrame;70	}71}72 73const getErrorLocation = (string, message) => {74	const match = message.match(/in JSON at position (?<index>\d+)(?: \(line (?<line>\d+) column (?<column>\d+)\))?$/);75 76	if (!match) {77		return;78	}79 80	const {index, line, column} = match.groups;81 82	if (line && column) {83		return {line: Number(line), column: Number(column)};84	}85 86	return indexToPosition(string, Number(index), {oneBased: true});87};88 89const addCodePointToUnexpectedToken = message => message.replace(90	// TODO[engine:node@>=20]: The token always quoted after Node.js 2091	/(?<=^Unexpected token )(?<quote>')?(.)\k<quote>/,92	(_, _quote, token) => `"${token}"(${getCodePoint(token)})`,93);94 95export default function parseJson(string, reviver, fileName) {96	if (typeof reviver === 'string') {97		fileName = reviver;98		reviver = undefined;99	}100 101	try {102		return JSON.parse(string, reviver);103	} catch (error) {104		throw new JSONError({105			jsonParseError: error,106			fileName,107			input: string,108		});109	}110}111