Update to NPM version

ProjectSourceCode/node_modules/pg/lib/utils.js

@@ -0,0 +1,187 @@
+'use strict'
+
+const crypto = require('crypto')
+
+const defaults = require('./defaults')
+
+function escapeElement(elementRepresentation) {
+  var escaped = elementRepresentation.replace(/\\/g, '\\\\').replace(/"/g, '\\"')
+
+  return '"' + escaped + '"'
+}
+
+// convert a JS array to a postgres array literal
+// uses comma separator so won't work for types like box that use
+// a different array separator.
+function arrayString(val) {
+  var result = '{'
+  for (var i = 0; i < val.length; i++) {
+    if (i > 0) {
+      result = result + ','
+    }
+    if (val[i] === null || typeof val[i] === 'undefined') {
+      result = result + 'NULL'
+    } else if (Array.isArray(val[i])) {
+      result = result + arrayString(val[i])
+    } else if (val[i] instanceof Buffer) {
+      result += '\\\\x' + val[i].toString('hex')
+    } else {
+      result += escapeElement(prepareValue(val[i]))
+    }
+  }
+  result = result + '}'
+  return result
+}
+
+// converts values from javascript types
+// to their 'raw' counterparts for use as a postgres parameter
+// note: you can override this function to provide your own conversion mechanism
+// for complex types, etc...
+var prepareValue = function (val, seen) {
+  // null and undefined are both null for postgres
+  if (val == null) {
+    return null
+  }
+  if (val instanceof Buffer) {
+    return val
+  }
+  if (ArrayBuffer.isView(val)) {
+    var buf = Buffer.from(val.buffer, val.byteOffset, val.byteLength)
+    if (buf.length === val.byteLength) {
+      return buf
+    }
+    return buf.slice(val.byteOffset, val.byteOffset + val.byteLength) // Node.js v4 does not support those Buffer.from params
+  }
+  if (val instanceof Date) {
+    if (defaults.parseInputDatesAsUTC) {
+      return dateToStringUTC(val)
+    } else {
+      return dateToString(val)
+    }
+  }
+  if (Array.isArray(val)) {
+    return arrayString(val)
+  }
+  if (typeof val === 'object') {
+    return prepareObject(val, seen)
+  }
+  return val.toString()
+}
+
+function prepareObject(val, seen) {
+  if (val && typeof val.toPostgres === 'function') {
+    seen = seen || []
+    if (seen.indexOf(val) !== -1) {
+      throw new Error('circular reference detected while preparing "' + val + '" for query')
+    }
+    seen.push(val)
+
+    return prepareValue(val.toPostgres(prepareValue), seen)
+  }
+  return JSON.stringify(val)
+}
+
+function pad(number, digits) {
+  number = '' + number
+  while (number.length < digits) {
+    number = '0' + number
+  }
+  return number
+}
+
+function dateToString(date) {
+  var offset = -date.getTimezoneOffset()
+
+  var year = date.getFullYear()
+  var isBCYear = year < 1
+  if (isBCYear) year = Math.abs(year) + 1 // negative years are 1 off their BC representation
+
+  var ret =
+    pad(year, 4) +
+    '-' +
+    pad(date.getMonth() + 1, 2) +
+    '-' +
+    pad(date.getDate(), 2) +
+    'T' +
+    pad(date.getHours(), 2) +
+    ':' +
+    pad(date.getMinutes(), 2) +
+    ':' +
+    pad(date.getSeconds(), 2) +
+    '.' +
+    pad(date.getMilliseconds(), 3)
+
+  if (offset < 0) {
+    ret += '-'
+    offset *= -1
+  } else {
+    ret += '+'
+  }
+
+  ret += pad(Math.floor(offset / 60), 2) + ':' + pad(offset % 60, 2)
+  if (isBCYear) ret += ' BC'
+  return ret
+}
+
+function dateToStringUTC(date) {
+  var year = date.getUTCFullYear()
+  var isBCYear = year < 1
+  if (isBCYear) year = Math.abs(year) + 1 // negative years are 1 off their BC representation
+
+  var ret =
+    pad(year, 4) +
+    '-' +
+    pad(date.getUTCMonth() + 1, 2) +
+    '-' +
+    pad(date.getUTCDate(), 2) +
+    'T' +
+    pad(date.getUTCHours(), 2) +
+    ':' +
+    pad(date.getUTCMinutes(), 2) +
+    ':' +
+    pad(date.getUTCSeconds(), 2) +
+    '.' +
+    pad(date.getUTCMilliseconds(), 3)
+
+  ret += '+00:00'
+  if (isBCYear) ret += ' BC'
+  return ret
+}
+
+function normalizeQueryConfig(config, values, callback) {
+  // can take in strings or config objects
+  config = typeof config === 'string' ? { text: config } : config
+  if (values) {
+    if (typeof values === 'function') {
+      config.callback = values
+    } else {
+      config.values = values
+    }
+  }
+  if (callback) {
+    config.callback = callback
+  }
+  return config
+}
+
+const md5 = function (string) {
+  return crypto.createHash('md5').update(string, 'utf-8').digest('hex')
+}
+
+// See AuthenticationMD5Password at https://www.postgresql.org/docs/current/static/protocol-flow.html
+const postgresMd5PasswordHash = function (user, password, salt) {
+  var inner = md5(password + user)
+  var outer = md5(Buffer.concat([Buffer.from(inner), salt]))
+  return 'md5' + outer
+}
+
+module.exports = {
+  prepareValue: function prepareValueWrapper(value) {
+    // this ensures that extra arguments do not get passed into prepareValue
+    // by accident, eg: from calling values.map(utils.prepareValue)
+    return prepareValue(value)
+  },
+  normalizeQueryConfig,
+  postgresMd5PasswordHash,
+  md5,
+}