Returns the country code and phone number from number

PhoneNumberManager

```swift
import Foundation

class PhoneNumberManager {
  static func readJson() -> [String: Any]? {
    if let fileUrl = Bundle.main.url(forResource: "DailerCodeTree", withExtension: "json") {
      do {
        let data = try Data(contentsOf: fileUrl)
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        let dictionary = json as! [String: Any]
        let plusDictionary = dictionary["+"] as! [String: Any]
        return plusDictionary
      } catch {
        print(error.localizedDescription)
        return nil
      }
    }
    print("File not found!")
    return nil
  }
  
  static func parseCountryCode(_ number: String) -> String? {
    var phoneNumber = number
    if number.first != "+" {
      phoneNumber = "+\(number)"
    }
    
    var countryCode = "+"
    let phoneDictionary = readJson()!
    if phoneNumber.count < 5 {
      print("Invalid phone number, phone number should be atleast 5 characters.")
      return nil
    }
    
    if let firstNumberOfPhone = phoneNumber.getCharacterAt(1) {
      countryCode.append(firstNumberOfPhone)
      if let firstNumberOfJson = phoneDictionary[firstNumberOfPhone] as? [String: Any] {
        if firstNumberOfJson.keys.contains(phoneNumber.getCharacterAt(2)!) {
          countryCode.append(phoneNumber.getCharacterAt(2)!)
          let secondNumberOfJson = firstNumberOfJson[phoneNumber.getCharacterAt(2)!] as! [String: Any]
          if secondNumberOfJson.keys.contains(phoneNumber.getCharacterAt(3)!) {
            countryCode.append(phoneNumber.getCharacterAt(3)!)
            let thirdNumberOfJson = secondNumberOfJson[phoneNumber.getCharacterAt(3)!] as! [String: Any]
            if thirdNumberOfJson.keys.contains(phoneNumber.getCharacterAt(4)!) {
              countryCode.append(phoneNumber.getCharacterAt(4)!)
              let fourthNumberOfJson = thirdNumberOfJson[phoneNumber.getCharacterAt(4)!] as! [String: Any]
              if fourthNumberOfJson.keys.contains(phoneNumber.getCharacterAt(5)!) {
                countryCode.append(phoneNumber.getCharacterAt(5)!)
                // let fifthNumberOfJson = fourthNumberOfJson[phoneNumber.getCharacterAt(5)!] as! [String: Any]
              }
            }
          }
        }
      }
    }
    return countryCode
  }
}
```

Country code json can be found here