31 lines
983 B
JavaScript
31 lines
983 B
JavaScript
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'use strict';
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const format = require('./format');
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const { MESSAGE } = require('triple-beam');
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const stringify = require('safe-stable-stringify');
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/*
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* function replacer (key, value)
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* Handles proper stringification of Buffer and bigint output.
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*/
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function replacer(key, value) {
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// safe-stable-stringify does support BigInt, however, it doesn't wrap the value in quotes.
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// Leading to a loss in fidelity if the resulting string is parsed.
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// It would also be a breaking change for logform.
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if (typeof value === 'bigint')
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return value.toString();
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return value;
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}
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/*
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* function json (info)
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* Returns a new instance of the JSON format that turns a log `info`
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* object into pure JSON. This was previously exposed as { json: true }
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* to transports in `winston < 3.0.0`.
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*/
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module.exports = format((info, opts) => {
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const jsonStringify = stringify.configure(opts);
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info[MESSAGE] = jsonStringify(info, opts.replacer || replacer, opts.space);
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return info;
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});
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