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express-server/node_modules/pg/lib/result.js

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+'use strict'
+/**
+ * Copyright (c) 2010-2017 Brian Carlson (brian.m.carlson@gmail.com)
+ * All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * README.md file in the root directory of this source tree.
+ */
+
+var types = require('pg-types')
+
+// result object returned from query
+// in the 'end' event and also
+// passed as second argument to provided callback
+var Result = function (rowMode) {
+  this.command = null
+  this.rowCount = null
+  this.oid = null
+  this.rows = []
+  this.fields = []
+  this._parsers = []
+  this.RowCtor = null
+  this.rowAsArray = rowMode === 'array'
+  if (this.rowAsArray) {
+    this.parseRow = this._parseRowAsArray
+  }
+}
+
+var matchRegexp = /^([A-Za-z]+)(?: (\d+))?(?: (\d+))?/
+
+// adds a command complete message
+Result.prototype.addCommandComplete = function (msg) {
+  var match
+  if (msg.text) {
+    // pure javascript
+    match = matchRegexp.exec(msg.text)
+  } else {
+    // native bindings
+    match = matchRegexp.exec(msg.command)
+  }
+  if (match) {
+    this.command = match[1]
+    if (match[3]) {
+      // COMMMAND OID ROWS
+      this.oid = parseInt(match[2], 10)
+      this.rowCount = parseInt(match[3], 10)
+    } else if (match[2]) {
+      // COMMAND ROWS
+      this.rowCount = parseInt(match[2], 10)
+    }
+  }
+}
+
+Result.prototype._parseRowAsArray = function (rowData) {
+  var row = []
+  for (var i = 0, len = rowData.length; i < len; i++) {
+    var rawValue = rowData[i]
+    if (rawValue !== null) {
+      row.push(this._parsers[i](rawValue))
+    } else {
+      row.push(null)
+    }
+  }
+  return row
+}
+
+Result.prototype.parseRow = function (rowData) {
+  var row = {}
+  for (var i = 0, len = rowData.length; i < len; i++) {
+    var rawValue = rowData[i]
+    var field = this.fields[i].name
+    if (rawValue !== null) {
+      row[field] = this._parsers[i](rawValue)
+    } else {
+      row[field] = null
+    }
+  }
+  return row
+}
+
+Result.prototype.addRow = function (row) {
+  this.rows.push(row)
+}
+
+Result.prototype.addFields = function (fieldDescriptions) {
+  // clears field definitions
+  // multiple query statements in 1 action can result in multiple sets
+  // of rowDescriptions...eg: 'select NOW(); select 1::int;'
+  // you need to reset the fields
+  if (this.fields.length) {
+    this.fields = []
+    this._parsers = []
+  }
+  for (var i = 0; i < fieldDescriptions.length; i++) {
+    var desc = fieldDescriptions[i]
+    this.fields.push(desc)
+    var parser = this._getTypeParser(desc.dataTypeID, desc.format || 'text')
+    this._parsers.push(parser)
+  }
+}
+
+Result.prototype._getTypeParser = types.getTypeParser
+
+module.exports = Result