// Learning Processing
  // Daniel Shiffman
  // http://www.learningprocessing.com
  
  // Example 18-5: Parsing Yahoo's XML weather feed manually
  
  // A WeatherGrabber class
  class WeatherGrabber {
    
    int temperature = 0;
    String weather = "";
    String zip;
    
    WeatherGrabber(String tempZip) {
      zip = tempZip;
    }
    
    // Set a new Zip code
    void setZip(String tempZip) {
      zip = tempZip;
    }
    
    // Get the temperature
    int getTemp() {
      return temperature;
    }
    
    // Get the weather
    String getWeather() {
      return weather;
    }
    
    // Make the actual XML request
    void requestWeather() {
      // Get all the HTML/XML source code into an array of strings
      // (each line is one element in the array)
      String url = "http://xml.weather.yahoo.com/forecastrss?p=" + zip;
      String[] lines = loadStrings(url);
      
      // Turn array into one long String
      String xml = join(lines, "" ); 
      
      // Searching for weather condition
      String lookfor = " <yweather:condition text=\"";
      String end = "\"";
      weather = giveMeTextBetween(xml,lookfor,end);
      
      // Searching for temperature
      lookfor = "temp=\"";
      temperature = int(giveMeTextBetween (xml,lookfor,end));
    }
    
    // A function that returns a substring between two substrings
    String giveMeTextBetween(String s, String before, String after) {
      String found = "";
      int start = s.indexOf(before);    // Find the index of the beginning tag
      if (start == - 1) return"";       // If we don't find anything, send back a blank String
      start += before.length();         // Move to the end of the beginning tag
      int end = s.indexOf(after,start); // Find the index of the end tag
      if (end == -1) return"";          // If we don't find the end tag, send back a blank String
      return s.substring(start,end);    // Return the text in between
    }
    
  }