60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
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var split = require('split2')
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var eol = require('os').EOL
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var renderer = require('./lib/renderer')
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var levels = require('./lib/levels')
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module.exports = garnish
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function garnish (opt) {
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opt = opt || {}
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var loggerLevel = opt.level || 'debug'
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var render = renderer.create(opt.name)
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return split(parse)
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function parse (line) {
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try {
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var obj = JSON.parse(line)
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if (obj.name === 'http' && obj.message === 'request') return
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if (typeof obj.level === 'number') toBunyan(obj)
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// check if we need to style it
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if (!renderer.isStyleObject(obj)) return line + eol
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obj.level = obj.level || 'info'
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// allow user to filter to a specific level
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if (!levels.valid(loggerLevel, obj.level)) return
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// errors should be formatted differently
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if (typeof obj.err === 'object') return renderer.renderError(obj) + eol
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if (typeof obj.message === 'object') {
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return renderer.renderObject(obj) + eol
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}
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return render(obj) + eol
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} catch (e) {
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return line + eol
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}
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}
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}
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// mutate a bole log to bunyan log
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// obj -> null
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function toBunyan (obj) {
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if (obj.msg && !obj.message) {
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obj.message = obj.msg
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delete obj.msg
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}
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if (typeof obj.level === 'number') {
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if (obj.level === 20) obj.level = 'debug'
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if (obj.level === 30) obj.level = 'info'
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if (obj.level === 40) obj.level = 'warn'
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if (obj.level === 50) obj.level = 'error'
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}
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}
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