//
//  ViewController.swift
//  MyXML
//
//  Created by Hackeru_Student on 9/16/18.
//  Copyright © 2018 Hackeru_Student. All rights reserved.
//

import UIKit

class ViewController: UIViewController,XMLParserDelegate {

    //string which display our result
    var display:String = ""
    //boolean which indicate an element name
    var passName:Bool = false
    var passCountry:Bool = false
    //we need xml parser
    var parser=XMLParser()
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        //let start our work
        print ("Loading XML")
        let myUrl:String = "http://www.boi.org.il/currency.xml"
        //convert to URL
        let url:URL = URL(string: myUrl)!
        //user our parser for getting the information
        parser = XMLParser(contentsOf: url)!
        //let the parser know that all the methods are here
        parser.delegate=self
        //create a boolean expression if we succesed to parse the xml
        let success:Bool = parser.parse()
        if success
        {
            print ("xml is gotta")
            print ("our results:\n\(display)")
        }
        else
        {
            print ("we have an error")
        }
    }

    //start of element -> <NAME>
    func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) {
        switch elementName {
        case "COUNTRY":
            passCountry=true
        case "NAME":
            passName=true
        default:
            break
        }
    }
    
    //data inside element -> <name>DATA</name>
    func parser(_ parser: XMLParser, foundCharacters string: String) {
        if passName
        {
            display+="name:\(string) "
        }
        if passCountry
        {
            display+="Country:\(string)\n"
        }
    }

    func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
        switch elementName {
        case "COUNTRY":
            passCountry=false
        case "NAME":
            passName=false
        default:
            break
        }
        
    }
    
    func parser(_ parser: XMLParser, parseErrorOccurred parseError: Error) {
        print ("err:\(parseError)")
    }
}