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100 lines
2.5 KiB
100 lines
2.5 KiB
'use strict'
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var types = require('pg-types')
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var matchRegexp = /^([A-Za-z]+)(?: (\d+))?(?: (\d+))?/
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// result object returned from query
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// in the 'end' event and also
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// passed as second argument to provided callback
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class Result {
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constructor(rowMode, types) {
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this.command = null
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this.rowCount = null
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this.oid = null
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this.rows = []
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this.fields = []
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this._parsers = undefined
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this._types = types
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this.RowCtor = null
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this.rowAsArray = rowMode === 'array'
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if (this.rowAsArray) {
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this.parseRow = this._parseRowAsArray
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}
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}
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// adds a command complete message
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addCommandComplete(msg) {
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var match
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if (msg.text) {
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// pure javascript
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match = matchRegexp.exec(msg.text)
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} else {
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// native bindings
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match = matchRegexp.exec(msg.command)
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}
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if (match) {
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this.command = match[1]
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if (match[3]) {
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// COMMMAND OID ROWS
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this.oid = parseInt(match[2], 10)
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this.rowCount = parseInt(match[3], 10)
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} else if (match[2]) {
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// COMMAND ROWS
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this.rowCount = parseInt(match[2], 10)
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}
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}
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}
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_parseRowAsArray(rowData) {
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var row = new Array(rowData.length)
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for (var i = 0, len = rowData.length; i < len; i++) {
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var rawValue = rowData[i]
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if (rawValue !== null) {
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row[i] = this._parsers[i](rawValue)
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} else {
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row[i] = null
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}
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}
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return row
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}
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parseRow(rowData) {
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var row = {}
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for (var i = 0, len = rowData.length; i < len; i++) {
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var rawValue = rowData[i]
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var field = this.fields[i].name
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if (rawValue !== null) {
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row[field] = this._parsers[i](rawValue)
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} else {
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row[field] = null
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}
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}
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return row
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}
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addRow(row) {
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this.rows.push(row)
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}
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addFields(fieldDescriptions) {
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// clears field definitions
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// multiple query statements in 1 action can result in multiple sets
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// of rowDescriptions...eg: 'select NOW(); select 1::int;'
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// you need to reset the fields
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this.fields = fieldDescriptions
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if (this.fields.length) {
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this._parsers = new Array(fieldDescriptions.length)
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}
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for (var i = 0; i < fieldDescriptions.length; i++) {
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var desc = fieldDescriptions[i]
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if (this._types) {
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this._parsers[i] = this._types.getTypeParser(desc.dataTypeID, desc.format || 'text')
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} else {
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this._parsers[i] = types.getTypeParser(desc.dataTypeID, desc.format || 'text')
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}
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}
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}
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}
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module.exports = Result
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