cleaned up parsing logic and structure.

NzbDrone.Core/Update/UpdatePackageProvider.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+using NLog;
+using NzbDrone.Common;
+using NzbDrone.Core.Configuration;
+
+namespace NzbDrone.Core.Update
+{
+    public interface IUpdatePackageProvider
+    {
+        IEnumerable<UpdatePackage> GetAvailablePackages();
+        UpdatePackage GetLatestUpdate();
+    }
+
+    public class UpdatePackageProvider : IUpdatePackageProvider
+    {
+        private readonly IConfigService _configService;
+        private readonly IHttpProvider _httpProvider;
+        private readonly Logger _logger;
+
+        private static readonly Regex ParseRegex = new Regex(@"(?:\>)(?<filename>NzbDrone.+?(?<version>\d+\.\d+\.\d+\.\d+).+?)(?:\<\/A\>)", RegexOptions.IgnoreCase);
+
+        public UpdatePackageProvider(IConfigService configService, IHttpProvider httpProvider, Logger logger)
+        {
+            _configService = configService;
+            _httpProvider = httpProvider;
+            _logger = logger;
+        }
+
+        public IEnumerable<UpdatePackage> GetAvailablePackages()
+        {
+            var updateList = new List<UpdatePackage>();
+            var updateUrl = _configService.UpdateUrl;
+
+            _logger.Debug("Getting a list of updates from {0}", updateUrl);
+
+            var rawUpdateList = _httpProvider.DownloadString(updateUrl);
+            var matches = ParseRegex.Matches(rawUpdateList);
+
+            foreach (Match match in matches)
+            {
+                var updatePackage = new UpdatePackage();
+                updatePackage.FileName = match.Groups["filename"].Value;
+                updatePackage.Url = updateUrl + updatePackage.FileName;
+                updatePackage.Version = new Version(match.Groups["version"].Value);
+                updateList.Add(updatePackage);
+            }
+
+            _logger.Debug("Found {0} update packages", updateUrl.Length);
+
+            return updateList;
+        }
+
+        public UpdatePackage GetLatestUpdate()
+        {
+            return GetAvailablePackages().OrderByDescending(c => c.Version).FirstOrDefault();
+        }
+    }
+}