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Radarr/src/NzbDrone.Core/Indexers/XElementExtensions.cs

116 lines
3.3 KiB

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;
using System.Xml.Linq;
using NLog;
using NzbDrone.Common.Extensions;
using NzbDrone.Common.Instrumentation;
namespace NzbDrone.Core.Indexers
{
public static class XElementExtensions
{
private static readonly Logger Logger = NzbDroneLogger.GetLogger(typeof(XmlExtensions));
public static readonly Regex RemoveTimeZoneRegex = new Regex(@"\s[A-Z]{2,4}$", RegexOptions.Compiled);
public static string Title(this XElement item)
{
return item.TryGetValue("title", "Unknown");
}
public static XElement StripNameSpace(this XElement root)
{
var res = new XElement(
root.Name.LocalName,
root.HasElements ? root.Elements().Select(StripNameSpace) : (object)root.Value);
res.ReplaceAttributes(
root.Attributes().Where(attr => (!attr.IsNamespaceDeclaration)));
return res;
}
public static DateTime ParseDate(string dateString)
{
try
{
if (!DateTime.TryParse(dateString, DateTimeFormatInfo.InvariantInfo, DateTimeStyles.AssumeUniversal, out var result))
{
dateString = RemoveTimeZoneRegex.Replace(dateString, "");
result = DateTime.Parse(dateString, DateTimeFormatInfo.InvariantInfo, DateTimeStyles.AssumeUniversal);
}
return result.ToUniversalTime();
}
catch (FormatException e)
{
Logger.Warn(e, "Unable to parse " + dateString);
throw;
}
}
public static DateTime PublishDate(this XElement item)
{
var dateString = item.TryGetValue("pubDate");
return ParseDate(dateString);
}
public static List<string> Links(this XElement item)
{
var elements = item.Elements("link");
return elements.Select(link => link.Value).ToList();
}
public static string Description(this XElement item)
{
return item.TryGetValue("description");
}
public static string Comments(this XElement item)
{
return item.TryGetValue("comments");
}
public static long Length(this XElement item)
{
return long.Parse(item.TryGetValue("length"));
}
public static string TryGetValue(this XElement item, string elementName, string defaultValue = "")
{
var element = item.Element(elementName);
return element != null ? element.Value : defaultValue;
}
public static T TryGetValue<T>(this XElement item, string elementName, T defaultValue)
{
var element = item.Element(elementName);
if (element == null)
{
return defaultValue;
}
if (element.Value.IsNullOrWhiteSpace())
{
return defaultValue;
}
try
{
return (T)Convert.ChangeType(element.Value, typeof(T));
}
catch (InvalidCastException)
{
return defaultValue;
}
}
}
}