/// <summary>
/// Helper method that returns an <see cref="AirQuality"/> instance based on values stored in a dictionary
/// </summary>
/// <param name="dict"></param>
/// <returns></returns>
public static AirQuality CreateAirQuality(IDictionary <string, string> dict)
{
AirQuality quality = null;
if (!String.IsNullOrWhiteSpace(dict?["Location"]))
{
var location = dict["Location"].Split(',');
quality = new AirQuality
{
Location = location.Length == 2
? ValueTuple.Create(location[0], location[1])
: ValueTuple.Create(location[0], ""),
LastUpdate = dict["Last Update"],
ParticlePollution = dict["Particle Pollution"],
Ozone = dict["Ozone"],
Agency = dict["Agency"],
LocationIdentifier = int.Parse(dict["LocationIdentifier"])
};
}
else
{
quality = new NullAirQuality();
}
return(quality);
}
/// <summary>
/// Parses an RSS feed and returns a <see cref="AirQuality"/>.
/// </summary>
public virtual AirQuality ParseRss(string rawFeed, int locationIdentifier)
{
try
{
XDocument doc = XDocument.Parse(rawFeed);
if (doc.Root != null)
{
var channel = doc.Root.Descendants().First(i => i.Name.LocalName == "channel");
// RSS/Channel/item
var entries = from item in channel.Elements().Where(i => i.Name.LocalName == "item")
select new
{
Content = item.Elements().First(i => i.Name.LocalName == "description").Value
};
return(AirQuality.CreateAirQuality(GetAirQualityData(entries.FirstOrDefault()?.Content, locationIdentifier, FeedType.Rss)));
}
}
catch
{}
return(new NullAirQuality());
}