Add GPL modules

1 files changed, 278 insertions, 0 deletions

diff --git a/MediaBrowser.Common/Updates/GithubUpdater.cs b/MediaBrowser.Common/Updates/GithubUpdater.cs
new file mode 100644
index 000000000..4275799a9
--- /dev/null
+++ b/MediaBrowser.Common/Updates/GithubUpdater.cs
@@ -0,0 +1,278 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.Net;
+using MediaBrowser.Model.Serialization;
+using MediaBrowser.Model.Updates;
+
+namespace MediaBrowser.Common.Updates
+{
+    public class GithubUpdater
+    {
+        private readonly IHttpClient _httpClient;
+        private readonly IJsonSerializer _jsonSerializer;
+
+        public GithubUpdater(IHttpClient httpClient, IJsonSerializer jsonSerializer)
+        {
+            _httpClient = httpClient;
+            _jsonSerializer = jsonSerializer;
+        }
+
+        public async Task<CheckForUpdateResult> CheckForUpdateResult(string organzation, string repository, Version minVersion, PackageVersionClass updateLevel, string assetFilename, string packageName, string targetFilename, TimeSpan cacheLength, 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",
+                BufferContent = false
+            };
+
+            if (cacheLength.Ticks > 0)
+            {
+                options.CacheMode = CacheMode.Unconditional;
+                options.CacheLength = cacheLength;
+            }
+
+            using (var response = await _httpClient.SendAsync(options, "GET").ConfigureAwait(false))
+            {
+                using (var stream = response.Content)
+                {
+                    var obj = _jsonSerializer.DeserializeFromStream<RootObject[]>(stream);
+
+                    return CheckForUpdateResult(obj, minVersion, updateLevel, assetFilename, packageName, targetFilename);
+                }
+            }
+        }
+
+        private CheckForUpdateResult CheckForUpdateResult(RootObject[] obj, Version minVersion, PackageVersionClass updateLevel, string assetFilename, string packageName, string targetFilename)
+        {
+            if (updateLevel == PackageVersionClass.Release)
+            {
+                // Technically all we need to do is check that it's not pre-release
+                // But let's addititional checks for -beta and -dev to handle builds that might be temporarily tagged incorrectly.
+                obj = obj.Where(i => !i.prerelease && !i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase) && !i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase)).ToArray();
+            }
+            else if (updateLevel == PackageVersionClass.Beta)
+            {
+                obj = obj.Where(i => i.prerelease && i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase)).ToArray();
+            }
+            else if (updateLevel == PackageVersionClass.Dev)
+            {
+                obj = obj.Where(i => !i.prerelease || i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase) || i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase)).ToArray();
+            }
+
+            var availableUpdate = obj
+                .Select(i => CheckForUpdateResult(i, minVersion, assetFilename, packageName, targetFilename))
+                .Where(i => i != null)
+                .OrderByDescending(i => Version.Parse(i.AvailableVersion))
+                .FirstOrDefault();
+
+            return availableUpdate ?? new CheckForUpdateResult
+            {
+                IsUpdateAvailable = false
+            };
+        }
+
+        private bool MatchesUpdateLevel(RootObject i, PackageVersionClass updateLevel)
+        {
+            if (updateLevel == PackageVersionClass.Beta)
+            {
+                return i.prerelease && i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase);
+            }
+            if (updateLevel == PackageVersionClass.Dev)
+            {
+                return !i.prerelease || i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase) ||
+                       i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase);
+            }
+
+            // Technically all we need to do is check that it's not pre-release
+            // But let's addititional checks for -beta and -dev to handle builds that might be temporarily tagged incorrectly.
+            return !i.prerelease && !i.name.EndsWith("-beta", StringComparison.OrdinalIgnoreCase) &&
+                   !i.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase);
+        }
+
+        public async Task<List<RootObject>> GetLatestReleases(string organzation, string repository, string assetFilename, CancellationToken cancellationToken)
+        {
+            var list = new List<RootObject>();
+
+            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",
+                BufferContent = false
+            };
+
+            using (var response = await _httpClient.SendAsync(options, "GET").ConfigureAwait(false))
+            {
+                using (var stream = response.Content)
+                {
+                    var obj = _jsonSerializer.DeserializeFromStream<RootObject[]>(stream);
+
+                    obj = obj.Where(i => (i.assets ?? new List<Asset>()).Any(a => IsAsset(a, assetFilename, i.tag_name))).ToArray();
+
+                    list.AddRange(obj.Where(i => MatchesUpdateLevel(i, PackageVersionClass.Release)).OrderByDescending(GetVersion).Take(1));
+                    list.AddRange(obj.Where(i => MatchesUpdateLevel(i, PackageVersionClass.Beta)).OrderByDescending(GetVersion).Take(1));
+                    list.AddRange(obj.Where(i => MatchesUpdateLevel(i, PackageVersionClass.Dev)).OrderByDescending(GetVersion).Take(1));
+
+                    return list;
+                }
+            }
+        }
+
+        public Version GetVersion(RootObject obj)
+        {
+            Version version;
+            if (!Version.TryParse(obj.tag_name, out version))
+            {
+                return new Version(1, 0);
+            }
+
+            return version;
+        }
+
+        private CheckForUpdateResult CheckForUpdateResult(RootObject obj, Version minVersion, string assetFilename, string packageName, string targetFilename)
+        {
+            Version version;
+            var versionString = obj.tag_name;
+            if (!Version.TryParse(versionString, out version))
+            {
+                return null;
+            }
+
+            if (version < minVersion)
+            {
+                return null;
+            }
+
+            var asset = (obj.assets ?? new List<Asset>()).FirstOrDefault(i => IsAsset(i, assetFilename, versionString));
+
+            if (asset == null)
+            {
+                return null;
+            }
+
+            return new CheckForUpdateResult
+            {
+                AvailableVersion = version.ToString(),
+                IsUpdateAvailable = version > minVersion,
+                Package = new PackageVersionInfo
+                {
+                    classification = obj.prerelease ?
+                        (obj.name.EndsWith("-dev", StringComparison.OrdinalIgnoreCase) ? PackageVersionClass.Dev : PackageVersionClass.Beta) :
+                        PackageVersionClass.Release,
+                    name = packageName,
+                    sourceUrl = asset.browser_download_url,
+                    targetFilename = targetFilename,
+                    versionStr = version.ToString(),
+                    requiredVersionStr = "1.0.0",
+                    description = obj.body,
+                    infoUrl = obj.html_url
+                }
+            };
+        }
+
+        private bool IsAsset(Asset asset, string assetFilename, string version)
+        {
+            var downloadFilename = Path.GetFileName(asset.browser_download_url) ?? string.Empty;
+
+            assetFilename = assetFilename.Replace("{version}", version);
+
+            if (downloadFilename.IndexOf(assetFilename, StringComparison.OrdinalIgnoreCase) != -1)
+            {
+                return true;
+            }
+
+            return string.Equals(assetFilename, downloadFilename, StringComparison.OrdinalIgnoreCase);
+        }
+
+        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; }
+        }
+    }
+}