XML Parser

XML Parser.swift

import Foundation

struct Currency {
    
    var date: Date?
    var numCode: String?
    var charCode: String?
    var nominal: String?
    var nominalDouble: Double?
    var name: String?
    var value: String?
    var valueDouble: Double?
}

class XMLParcer: NSObject, XMLParserDelegate {
    
    var currencies = [Currency]()
    var currentCurrency: Currency?
    var currentDate: Date = Date()
    var currentCharacters: String = ""
    
    func parseXML() {
        let url = URL(string: "https://www.cbr.ru/scripts/XML_daily.asp?date_req=")
        let parser = XMLParser(contentsOf: url!)
        parser?.delegate = self
        parser?.parse()
        for index in 0..<currencies.count {
            currencies[index].date = currentDate
        }
        
    }
    
    func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String: String] = [:] ) {
        if elementName == "ValCurs" {
            if let currentDateString = attributeDict["Date"] {
                let formatter = DateFormatter()
                formatter.dateFormat = "dd.MM.yyyy"
                currentDate = formatter.date(from: currentDateString)!
            }
        }
        if elementName == "Valute" {
            currentCurrency = Currency()
        }
    }
    
    func parser(_ parser: XMLParser, foundCharacters string: String) {
        currentCharacters = string
    }
    
    func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
        if elementName == "NumCode"{
            currentCurrency?.numCode = currentCharacters
        }
        if elementName == "CharCode"{
            currentCurrency?.charCode = currentCharacters
        }
        if elementName == "Nominal"{
            currentCurrency?.nominal = currentCharacters
            currentCurrency?.nominalDouble = Double(currentCharacters.replacingOccurrences(of: ",", with: "."))
        }
        if elementName == "Name" {
            currentCurrency?.name = currentCharacters
        }
        if elementName == "Value"{
            currentCurrency?.value = currentCharacters
            currentCurrency?.valueDouble = Double(currentCharacters.replacingOccurrences(of: ",", with: "."))
        }
        if elementName == "Valute" {
            currencies.append(currentCurrency!)
        }
    }
}