1 files changed, 195 insertions, 0 deletions
diff --git a/MediaBrowser.Common.Implementations/Updates/GithubUpdater.cs b/MediaBrowser.Common.Implementations/Updates/GithubUpdater.cs
new file mode 100644
index 000000000..aff3dcf8d
--- /dev/null
+++ b/MediaBrowser.Common.Implementations/Updates/GithubUpdater.cs
@@ -0,0 +1,195 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Model.Serialization;
+using MediaBrowser.Model.Updates;
+
+namespace MediaBrowser.Common.Implementations.Updates
+{
+    public class GithubUpdater
+    {
+        private readonly IHttpClient _httpClient;
+        private readonly IJsonSerializer _jsonSerializer;
+        private TimeSpan _cacheLength;
+
+        public GithubUpdater(IHttpClient httpClient, IJsonSerializer jsonSerializer, TimeSpan cacheLength)
+        {
+            _httpClient = httpClient;
+            _jsonSerializer = jsonSerializer;
+            _cacheLength = cacheLength;
+        }
+
+        public async Task<CheckForUpdateResult> CheckForUpdateResult(string organzation, string repository, Version minVersion, bool includePrerelease, string assetFilename, string packageName, string targetFilename, CancellationToken cancellationToken)
+        {
+            var url = string.Format("https://api.github.com/repos/{0}/{1}/releases", organzation, repository);
+
+            var options = new HttpRequestOptions
+            {
+                Url = url,
+                EnableKeepAlive = false,
+                CancellationToken = cancellationToken,
+                UserAgent = "Emby/3.0"
+
+            };
+
+            if (_cacheLength.Ticks > 0)
+            {
+                options.CacheMode = CacheMode.Unconditional;
+                options.CacheLength = _cacheLength;
+            }
+
+            using (var stream = await _httpClient.Get(new HttpRequestOptions
+            {
+                Url = url,
+                EnableKeepAlive = false,
+                CancellationToken = cancellationToken,
+                UserAgent = "Emby/3.0"
+
+            }).ConfigureAwait(false))
+            {
+                var obj = _jsonSerializer.DeserializeFromStream<RootObject[]>(stream);
+
+                var availableUpdate = CheckForUpdateResult(obj, minVersion, includePrerelease, assetFilename, packageName, targetFilename);
+
+                return availableUpdate ?? new CheckForUpdateResult
+                {
+                    IsUpdateAvailable = false
+                };
+            }
+        }
+
+        private CheckForUpdateResult CheckForUpdateResult(RootObject[] obj, Version minVersion, bool includePrerelease, string assetFilename, string packageName, string targetFilename)
+        {
+            if (!includePrerelease)
+            {
+                obj = obj.Where(i => !i.prerelease).ToArray();
+            }
+
+            // TODO:
+            // Filter using name and check for suffixes such as -beta, -dev?
+
+            return obj.Select(i => CheckForUpdateResult(i, minVersion, assetFilename, packageName, targetFilename)).FirstOrDefault(i => i != null);
+        }
+
+        private CheckForUpdateResult CheckForUpdateResult(RootObject obj, Version minVersion, string assetFilename, string packageName, string targetFilename)
+        {
+            Version version;
+            if (!Version.TryParse(obj.tag_name, out version))
+            {
+                return null;
+            }
+
+            if (version < minVersion)
+            {
+                return null;
+            }
+
+            var asset = (obj.assets ?? new List<Asset>()).FirstOrDefault(i => string.Equals(assetFilename, Path.GetFileName(i.browser_download_url), StringComparison.OrdinalIgnoreCase));
+
+            if (asset == null)
+            {
+                return null;
+            }
+
+            return new CheckForUpdateResult
+            {
+                AvailableVersion = version.ToString(),
+                IsUpdateAvailable = version > minVersion,
+                Package = new PackageVersionInfo
+                {
+                    classification = obj.prerelease ? PackageVersionClass.Beta : PackageVersionClass.Release,
+                    name = packageName,
+                    sourceUrl = asset.browser_download_url,
+                    targetFilename = targetFilename,
+                    versionStr = version.ToString(),
+                    requiredVersionStr = "1.0.0"
+                }
+            };
+        }
+
+        public class Uploader
+        {
+            public string login { get; set; }
+            public int id { get; set; }
+            public string avatar_url { get; set; }
+            public string gravatar_id { get; set; }
+            public string url { get; set; }
+            public string html_url { get; set; }
+            public string followers_url { get; set; }
+            public string following_url { get; set; }
+            public string gists_url { get; set; }
+            public string starred_url { get; set; }
+            public string subscriptions_url { get; set; }
+            public string organizations_url { get; set; }
+            public string repos_url { get; set; }
+            public string events_url { get; set; }
+            public string received_events_url { get; set; }
+            public string type { get; set; }
+            public bool site_admin { get; set; }
+        }
+
+        public class Asset
+        {
+            public string url { get; set; }
+            public int id { get; set; }
+            public string name { get; set; }
+            public object label { get; set; }
+            public Uploader uploader { get; set; }
+            public string content_type { get; set; }
+            public string state { get; set; }
+            public int size { get; set; }
+            public int download_count { get; set; }
+            public string created_at { get; set; }
+            public string updated_at { get; set; }
+            public string browser_download_url { get; set; }
+        }
+
+        public class Author
+        {
+            public string login { get; set; }
+            public int id { get; set; }
+            public string avatar_url { get; set; }
+            public string gravatar_id { get; set; }
+            public string url { get; set; }
+            public string html_url { get; set; }
+            public string followers_url { get; set; }
+            public string following_url { get; set; }
+            public string gists_url { get; set; }
+            public string starred_url { get; set; }
+            public string subscriptions_url { get; set; }
+            public string organizations_url { get; set; }
+            public string repos_url { get; set; }
+            public string events_url { get; set; }
+            public string received_events_url { get; set; }
+            public string type { get; set; }
+            public bool site_admin { get; set; }
+        }
+
+        public class RootObject
+        {
+            public string url { get; set; }
+            public string assets_url { get; set; }
+            public string upload_url { get; set; }
+            public string html_url { get; set; }
+            public int id { get; set; }
+            public string tag_name { get; set; }
+            public string target_commitish { get; set; }
+            public string name { get; set; }
+            public bool draft { get; set; }
+            public Author author { get; set; }
+            public bool prerelease { get; set; }
+            public string created_at { get; set; }
+            public string published_at { get; set; }
+            public List<Asset> assets { get; set; }
+            public string tarball_url { get; set; }
+            public string zipball_url { get; set; }
+            public string body { get; set; }
+        }
+    }
+}