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using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
namespace UnityLauncherPro
{
public static class GetUnityUpdates
{
private const string BaseApiUrl = "https://services.api.unity.com/unity/editor/release/v1/releases";
private const int BatchSize = 25;
private const int RequestsPerBatch = 10;
private const int DelayBetweenBatches = 1000; // 1 second in milliseconds
private const string CacheFileName = "UnityVersionCache.json";
private static readonly HttpClient Client = new HttpClient();
public static string unofficalReleasesURL = "https://raw.githubusercontent.com/unitycoder/UnofficialUnityReleasesWatcher/refs/heads/main/unity-releases.md";
static Dictionary<string, string> unofficialReleaseURLs = new Dictionary<string, string>();
public static async Task<List<UnityVersion>> FetchAll(bool useUnofficialList = false)
{
var cachedVersions = LoadCachedVersions();
var newVersions = await FetchNewVersions(cachedVersions);
var allVersions = newVersions.Concat(cachedVersions).ToList();
if (useUnofficialList == true)
{
var unofficialVersions = await FetchUnofficialVersions(cachedVersions);
unofficialReleaseURLs.Clear();
// TODO modify FetchUnofficialVersions to put items in this dictionary directly
foreach (var version in unofficialVersions)
{
Console.WriteLine("version in unofficials: " + version);
// add only if not there yet
if (unofficialReleaseURLs.ContainsKey(version.Version) == false)
{
Console.WriteLine("added unofficial: " + version.Version + " , " + version.directURL);
unofficialReleaseURLs.Add(version.Version, version.directURL);
}
}
// combine
allVersions = unofficialVersions.Concat(allVersions).ToList();
}
if (newVersions.Count > 0 || (useUnofficialList && unofficialReleaseURLs.Count > 0))
{
SaveCachedVersions(allVersions);
}
return allVersions;
}
public static async Task<List<UnityVersion>> FetchUnofficialVersions(List<UnityVersion> cachedVersions)
{
var unofficialVersions = new List<UnityVersion>();
var existingVersions = new HashSet<string>(cachedVersions.Select(v => v.Version));
try
{
var content = await Client.GetStringAsync(unofficalReleasesURL);
// Parse the Markdown content
var lines = content.Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var line in lines)
{
//Console.WriteLine(line);
if (line.StartsWith("- ")) // Identify Markdown list items
{
var urlPart = line.Substring(4).Trim(); // bug in server, has double -
var version = ExtractVersionFromUrl(urlPart);
//Console.WriteLine("VERSION: " + version);
//Console.WriteLine("IsNullOrEmpty: " + (string.IsNullOrEmpty(version)) + ", existingVersions:" + (existingVersions.Contains(version)));
if (string.IsNullOrEmpty(version) == false && existingVersions.Contains(version) == false)
{
var stream = InferStreamFromVersion(version);
Console.WriteLine(version + " , " + urlPart);
unofficialVersions.Add(new UnityVersion
{
Version = version,
Stream = stream,
ReleaseDate = DateTime.Now, // NOTE not correct, but we don't have known release date for unofficial versions (its only when they are found..)
//ReleaseDate = DateTime.MinValue // Release date is unavailable in the MD format, TODO add to md as #2021-01-01 ?
directURL = urlPart, // this is available only for unofficial releases
});
}
}
}
}
catch (Exception ex)
{
Console.WriteLine($"Error fetching unofficial versions: {ex.Message}");
}
return unofficialVersions;
}
// TODO fixme, f is not always LTS
private static UnityVersionStream InferStreamFromVersion(string version)
{
if (Tools.IsAlpha(version)) return UnityVersionStream.Alpha;
if (Tools.IsBeta(version)) return UnityVersionStream.Beta;
if (Tools.IsLTS(version)) return UnityVersionStream.LTS;
//if (version.Contains("a")) return UnityVersionStream.Alpha;
//if (version.Contains("b")) return UnityVersionStream.Beta;
//if (version.Contains("f")) return UnityVersionStream.LTS;
return UnityVersionStream.Tech; // Default to Tech if no identifier is found
}
/// <summary>
/// Extracts the Unity version from the given URL.
/// </summary>
/// <param name="url">The URL to parse.</param>
/// <returns>The Unity version string.</returns>
private static string ExtractVersionFromUrl(string url)
{
try
{
var versionStart = url.LastIndexOf('#') + 1;
return versionStart > 0 && versionStart < url.Length ? url.Substring(versionStart) : null;
}
catch
{
return null;
}
}
public static async Task<string> FetchDownloadUrl(string unityVersion)
{
if (string.IsNullOrEmpty(unityVersion))
{
return null;
}
// unity release api
string apiUrl = $"{BaseApiUrl}?limit=1&version={unityVersion}&architecture=X86_64&platform=WINDOWS";
try
{
string responseString = await Client.GetStringAsync(apiUrl);
return await ExtractDownloadUrlAsync(responseString, unityVersion);
}
catch (Exception e)
{
Console.WriteLine($"Error fetching download URL: {e.Message}");
return null;
}
}
private static async Task<string> ExtractDownloadUrlAsync(string json, string unityVersion)
{
//Console.WriteLine("json: " + json + " vers: " + unityVersion);
if (json.Contains("\"results\":[]"))
{
Console.WriteLine("No results found from releases API, checking unofficial list (if enabled), v=" + unityVersion);
// print unofficialReleaseURLs
foreach (var kvp in unofficialReleaseURLs)
{
Console.WriteLine($"Unofficial: {kvp.Key} => {kvp.Value}");
}
if (unofficialReleaseURLs.ContainsKey(unityVersion))
{
Console.WriteLine("Unofficial release found in the list: ");
string unityHash = Tools.ParseHashCodeFromURL(unofficialReleaseURLs[unityVersion]);
// Console.WriteLine(unityHash);
string downloadURL = Tools.ParseDownloadURLFromWebpage(unityVersion, unityHash, false, true);
// Console.WriteLine("direct download url: "+downloadURL);
return downloadURL;
}
return null;
}
int resultsIndex = json.IndexOf("\"results\":");
if (resultsIndex == -1) return null;
int downloadsIndex = json.IndexOf("\"downloads\":", resultsIndex);
if (downloadsIndex == -1) return null;
int urlIndex = json.IndexOf("\"url\":", downloadsIndex);
if (urlIndex == -1) return null;
int urlStart = json.IndexOf('"', urlIndex + 6) + 1;
int urlEnd = json.IndexOf('"', urlStart);
string downloadUrl = json.Substring(urlStart, urlEnd - urlStart);
int revisionIndex = json.IndexOf("\"shortRevision\":", resultsIndex);
string shortRevision = null;
if (revisionIndex != -1)
{
int revisionStart = json.IndexOf('"', revisionIndex + 16) + 1;
int revisionEnd = json.IndexOf('"', revisionStart);
shortRevision = json.Substring(revisionStart, revisionEnd - revisionStart);
}
if (!string.IsNullOrEmpty(downloadUrl) && !string.IsNullOrEmpty(shortRevision))
{
int revisionPosition = downloadUrl.LastIndexOf(shortRevision, StringComparison.Ordinal) + shortRevision.Length + 1;
string assistantUrl = downloadUrl.Substring(0, revisionPosition) + $"UnityDownloadAssistant-{unityVersion}.exe";
if (await CheckAssistantUrl(assistantUrl))
{
//Console.WriteLine("ExtractDownloadUrlAsync: Assistant download URL found.");
return assistantUrl;
}
else
{
Console.WriteLine("Assistant download URL not found, returning original download URL.");
return downloadUrl;
}
}
Console.WriteLine("Returning original download URL.");
return downloadUrl;
}
private static async Task<bool> CheckAssistantUrl(string assistantUrl)
{
try
{
using (HttpResponseMessage response = await Client.GetAsync(assistantUrl))
{
return response.IsSuccessStatusCode;
}
}
catch (Exception ex)
{
Console.WriteLine($"Request failed: {ex.Message}");
return false;
}
}
private static async Task<List<UnityVersion>> FetchNewVersions(List<UnityVersion> cachedVersions)
{
var newVersions = new List<UnityVersion>();
var cachedVersionSet = new HashSet<string>(cachedVersions.Select(v => v.Version));
int offset = 0;
int total = int.MaxValue;
bool foundNewVersionInBatch;
while (offset < total)
{
var batchUpdates = await FetchBatch(offset);
if (batchUpdates == null || batchUpdates.Count == 0) break;
foundNewVersionInBatch = false;
foreach (var version in batchUpdates)
{
if (!cachedVersionSet.Contains(version.Version))
{
newVersions.Add(version);
foundNewVersionInBatch = true;
}
}
if (!foundNewVersionInBatch)
{
// Exit if no new versions are found in the current batch
break;
}
offset += batchUpdates.Count;
// Apply delay if reaching batch limit
if (offset % (BatchSize * RequestsPerBatch) == 0)
{
await Task.Delay(DelayBetweenBatches);
}
}
return newVersions;
}
private static async Task<List<UnityVersion>> FetchBatch(int offset)
{
string url = $"{BaseApiUrl}?limit={BatchSize}&offset={offset}&architecture=X86_64&platform=WINDOWS";
try
{
string response = await Client.GetStringAsync(url);
return ParseUnityVersions(response);
}
catch (Exception e)
{
Console.WriteLine($"Error fetching batch: {e.Message}");
return null;
}
}
private static List<UnityVersion> ParseUnityVersions(string json)
{
var versions = new List<UnityVersion>();
int resultsIndex = json.IndexOf("\"results\":");
if (resultsIndex == -1) return versions;
string[] items = json.Substring(resultsIndex).Split(new[] { "{" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string item in items)
{
if (item.Contains("\"version\""))
{
var version = new UnityVersion
{
Version = GetStringValue(item, "version"),
ReleaseDate = DateTime.TryParse(GetStringValue(item, "releaseDate"), out var date) ? date : default,
Stream = Enum.TryParse<UnityVersionStream>(GetStringValue(item, "stream"), true, out var stream) ? stream : UnityVersionStream.Tech
};
//Console.WriteLine(version.Version);
versions.Add(version);
}
}
return versions;
}
private static List<UnityVersion> ParseCachedUnityVersions(string json)
{
var versions = new List<UnityVersion>();
// Remove square brackets at the beginning and end of the array
json = json.Trim(new[] { '[', ']' });
// Split each item based on the closing bracket and opening bracket of consecutive objects
string[] items = json.Split(new[] { "},{" }, StringSplitOptions.RemoveEmptyEntries);
foreach (string item in items)
{
// Ensure each item is properly enclosed in braces to handle edge cases
string cleanItem = "{" + item.Trim(new[] { '{', '}' }) + "}";
// Parse each UnityVersion object
if (cleanItem.Contains("\"version\""))
{
var version = new UnityVersion
{
Version = GetStringValue(cleanItem, "version"),
ReleaseDate = DateTime.TryParse(GetStringValue(cleanItem, "releaseDate"), out var date) ? date : default,
Stream = Enum.TryParse<UnityVersionStream>(GetStringValue(cleanItem, "stream"), true, out var stream) ? stream : UnityVersionStream.Tech
};
versions.Add(version);
}
}
return versions;
}
//private static string GetStringValue(string source, string propertyName)
//{
// int propertyIndex = source.IndexOf($"\"{propertyName}\":");
// if (propertyIndex == -1) return null;
// int valueStart = source.IndexOf('"', propertyIndex + propertyName.Length + 2) + 1;
// int valueEnd = source.IndexOf('"', valueStart);
// return source.Substring(valueStart, valueEnd - valueStart);
//}
private static string GetStringValue(string source, string propertyName)
{
int propertyIndex = source.IndexOf($"\"{propertyName}\":");
if (propertyIndex == -1) return null;
int valueStart = source.IndexOf('"', propertyIndex + propertyName.Length + 2) + 1;
int valueEnd = source.IndexOf('"', valueStart);
return source.Substring(valueStart, valueEnd - valueStart);
}
private static List<UnityVersion> LoadCachedVersions()
{
string configFilePath = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath;
string configDirectory = Path.GetDirectoryName(configFilePath);
if (configDirectory == null) return new List<UnityVersion>();
string cacheFilePath = Path.Combine(configDirectory, CacheFileName);
if (!File.Exists(cacheFilePath)) return new List<UnityVersion>();
Console.WriteLine("cache file: " + cacheFilePath);
string json = File.ReadAllText(cacheFilePath);
return ParseCachedUnityVersions(json);
}
private static void SaveCachedVersions(List<UnityVersion> versions)
{
string json = "[";
foreach (var version in versions)
{
json += $"{{\"version\":\"{version.Version}\",\"releaseDate\":\"{version.ReleaseDate:O}\",\"stream\":\"{version.Stream}\"}},";
}
json = json.TrimEnd(',') + "]";
string configFilePath = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath;
string configDirectory = Path.GetDirectoryName(configFilePath);
if (configDirectory == null) return;
string cacheFilePath = Path.Combine(configDirectory, CacheFileName);
//Console.WriteLine("Saving cachedrelease: " + cacheFilePath);
File.WriteAllText(cacheFilePath, json);
}
internal static async Task<string> CheckUnofficialVersionList(string version)
{
// fetch md page from unofficalReleasesURL
var content = await Client.GetStringAsync(unofficalReleasesURL);
// parse lines
var lines = content.Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var line in lines)
{
if (line.StartsWith("- ")) // Identify Markdown list items
{
var urlPart = line.Substring(4).Trim(); // bug in server, has double -
var foundVersion = ExtractVersionFromUrl(urlPart);
if (foundVersion == version)
{
Console.WriteLine("Found unofficial version in the list: " + foundVersion + " , " + urlPart);
return urlPart;
}
}
}
return null;
}
}
}
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