55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
'use strict';
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const errorEx = require('error-ex');
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const fallback = require('json-parse-even-better-errors');
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const {default: LinesAndColumns} = require('lines-and-columns');
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const {codeFrameColumns} = require('@babel/code-frame');
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const JSONError = errorEx('JSONError', {
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fileName: errorEx.append('in %s'),
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codeFrame: errorEx.append('\n\n%s\n')
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});
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const parseJson = (string, reviver, filename) => {
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if (typeof reviver === 'string') {
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filename = reviver;
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reviver = null;
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}
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try {
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try {
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return JSON.parse(string, reviver);
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} catch (error) {
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fallback(string, reviver);
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throw error;
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}
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} catch (error) {
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error.message = error.message.replace(/\n/g, '');
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const indexMatch = error.message.match(/in JSON at position (\d+) while parsing/);
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const jsonError = new JSONError(error);
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if (filename) {
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jsonError.fileName = filename;
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}
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if (indexMatch && indexMatch.length > 0) {
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const lines = new LinesAndColumns(string);
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const index = Number(indexMatch[1]);
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const location = lines.locationForIndex(index);
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const codeFrame = codeFrameColumns(
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string,
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{start: {line: location.line + 1, column: location.column + 1}},
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{highlightCode: true}
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);
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jsonError.codeFrame = codeFrame;
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}
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throw jsonError;
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}
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};
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parseJson.JSONError = JSONError;
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module.exports = parseJson;
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