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1const META = Symbol('proc-log.meta')2module.exports = {3  META: META,4  output: {5    LEVELS: [6      'standard',7      'error',8      'buffer',9      'flush',10    ],11    KEYS: {12      standard: 'standard',13      error: 'error',14      buffer: 'buffer',15      flush: 'flush',16    },17    standard: function (...args) {18      return process.emit('output', 'standard', ...args)19    },20    error: function (...args) {21      return process.emit('output', 'error', ...args)22    },23    buffer: function (...args) {24      return process.emit('output', 'buffer', ...args)25    },26    flush: function (...args) {27      return process.emit('output', 'flush', ...args)28    },29  },30  log: {31    LEVELS: [32      'notice',33      'error',34      'warn',35      'info',36      'verbose',37      'http',38      'silly',39      'timing',40      'pause',41      'resume',42    ],43    KEYS: {44      notice: 'notice',45      error: 'error',46      warn: 'warn',47      info: 'info',48      verbose: 'verbose',49      http: 'http',50      silly: 'silly',51      timing: 'timing',52      pause: 'pause',53      resume: 'resume',54    },55    error: function (...args) {56      return process.emit('log', 'error', ...args)57    },58    notice: function (...args) {59      return process.emit('log', 'notice', ...args)60    },61    warn: function (...args) {62      return process.emit('log', 'warn', ...args)63    },64    info: function (...args) {65      return process.emit('log', 'info', ...args)66    },67    verbose: function (...args) {68      return process.emit('log', 'verbose', ...args)69    },70    http: function (...args) {71      return process.emit('log', 'http', ...args)72    },73    silly: function (...args) {74      return process.emit('log', 'silly', ...args)75    },76    timing: function (...args) {77      return process.emit('log', 'timing', ...args)78    },79    pause: function () {80      return process.emit('log', 'pause')81    },82    resume: function () {83      return process.emit('log', 'resume')84    },85  },86  time: {87    LEVELS: [88      'start',89      'end',90    ],91    KEYS: {92      start: 'start',93      end: 'end',94    },95    start: function (name, fn) {96      process.emit('time', 'start', name)97      function end () {98        return process.emit('time', 'end', name)99      }100      if (typeof fn === 'function') {101        const res = fn()102        if (res && res.finally) {103          return res.finally(end)104        }105        end()106        return res107      }108      return end109    },110    end: function (name) {111      return process.emit('time', 'end', name)112    },113  },114  input: {115    LEVELS: [116      'start',117      'end',118      'read',119    ],120    KEYS: {121      start: 'start',122      end: 'end',123      read: 'read',124    },125    start: function (...args) {126      // Support callback for backwards compatibility and pass additional args to event127      let fn128      if (typeof args[0] === 'function') {129        fn = args.shift()130      }131      process.emit('input', 'start', ...args)132      function end () {133        return process.emit('input', 'end', ...args)134      }135      if (typeof fn === 'function') {136        const res = fn()137        if (res && res.finally) {138          return res.finally(end)139        }140        end()141        return res142      }143      return end144    },145    end: function (...args) {146      return process.emit('input', 'end', ...args)147    },148    read: function (...args) {149      let resolve, reject150      const promise = new Promise((_resolve, _reject) => {151        resolve = _resolve152        reject = _reject153      })154      process.emit('input', 'read', resolve, reject, ...args)155      return promise156    },157  },158}159