FM / aproba

/usr/lib/node_modules/npm/node_modules/aproba/

/usr/lib/node_modules/npm/node_modules/aproba

Name	Size	Mode	Actions
CHANGELOG.md	168	0644	edit dl rm
index.js	3644	0644	edit dl rm
LICENSE	752	0644	edit dl rm
package.json	1554	0644	edit dl rm
README.md	2743	0644	edit dl rm

Edit: /usr/lib/node_modules/npm/node_modules/aproba/index.js (3644B)

'use strict'
module.exports = validate

function isArguments (thingy) {
  return thingy != null && typeof thingy === 'object' && thingy.hasOwnProperty('callee')
}

const types = {
  '*': {label: 'any', check: () => true},
  A: {label: 'array', check: _ => Array.isArray(_) || isArguments(_)},
  S: {label: 'string', check: _ => typeof _ === 'string'},
  N: {label: 'number', check: _ => typeof _ === 'number'},
  F: {label: 'function', check: _ => typeof _ === 'function'},
  O: {label: 'object', check: _ => typeof _ === 'object' && _ != null && !types.A.check(_) && !types.E.check(_)},
  B: {label: 'boolean', check: _ => typeof _ === 'boolean'},
  E: {label: 'error', check: _ => _ instanceof Error},
  Z: {label: 'null', check: _ => _ == null}
}

function addSchema (schema, arity) {
  const group = arity[schema.length] = arity[schema.length] || []
  if (group.indexOf(schema) === -1) group.push(schema)
}

function validate (rawSchemas, args) {
  if (arguments.length !== 2) throw wrongNumberOfArgs(['SA'], arguments.length)
  if (!rawSchemas) throw missingRequiredArg(0, 'rawSchemas')
  if (!args) throw missingRequiredArg(1, 'args')
  if (!types.S.check(rawSchemas)) throw invalidType(0, ['string'], rawSchemas)
  if (!types.A.check(args)) throw invalidType(1, ['array'], args)
  const schemas = rawSchemas.split('|')
  const arity = {}

schemas.forEach(schema => {
    for (let ii = 0; ii < schema.length; ++ii) {
      const type = schema[ii]
      if (!types[type]) throw unknownType(ii, type)
    }
    if (/E.*E/.test(schema)) throw moreThanOneError(schema)
    addSchema(schema, arity)
    if (/E/.test(schema)) {
      addSchema(schema.replace(/E.*$/, 'E'), arity)
      addSchema(schema.replace(/E/, 'Z'), arity)
      if (schema.length === 1) addSchema('', arity)
    }
  })
  let matching = arity[args.length]
  if (!matching) {
    throw wrongNumberOfArgs(Object.keys(arity), args.length)
  }
  for (let ii = 0; ii < args.length; ++ii) {
    let newMatching = matching.filter(schema => {
      const type = schema[ii]
      const typeCheck = types[type].check
      return typeCheck(args[ii])
    })
    if (!newMatching.length) {
      const labels = matching.map(_ => types[_[ii]].label).filter(_ => _ != null)
      throw invalidType(ii, labels, args[ii])
    }
    matching = newMatching
  }
}

function missingRequiredArg (num) {
  return newException('EMISSINGARG', 'Missing required argument #' + (num + 1))
}

function unknownType (num, type) {
  return newException('EUNKNOWNTYPE', 'Unknown type ' + type + ' in argument #' + (num + 1))
}

function invalidType (num, expectedTypes, value) {
  let valueType
  Object.keys(types).forEach(typeCode => {
    if (types[typeCode].check(value)) valueType = types[typeCode].label
  })
  return newException('EINVALIDTYPE', 'Argument #' + (num + 1) + ': Expected ' +
    englishList(expectedTypes) + ' but got ' + valueType)
}

function englishList (list) {
  return list.join(', ').replace(/, ([^,]+)$/, ' or $1')
}

function wrongNumberOfArgs (expected, got) {
  const english = englishList(expected)
  const args = expected.every(ex => ex.length === 1)
    ? 'argument'
    : 'arguments'
  return newException('EWRONGARGCOUNT', 'Expected ' + english + ' ' + args + ' but got ' + got)
}

function moreThanOneError (schema) {
  return newException('ETOOMANYERRORTYPES',
    'Only one error type per argument signature is allowed, more than one found in "' + schema + '"')
}

function newException (code, msg) {
  const err = new Error(msg)
  err.code = code
  /* istanbul ignore else */
  if (Error.captureStackTrace) Error.captureStackTrace(err, validate)
  return err
}

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