From f0e1abc9bf69256072fa04571ba1223f89d3407a Mon Sep 17 00:00:00 2001
From: "waffle.lord" <waffle.lord@hotmail.com>
Date: Thu, 21 Sep 2023 10:53:01 -0400
Subject: [PATCH] add mirror downloaders to only handle downloading of a mirror

---
 SPTInstaller/Interfaces/IMirrorDownloader.cs  |  9 +++++
 .../Models/{ => Mirrors}/DownloadMirror.cs    |  2 +-
 .../Downloaders/HttpMirrorDownloader.cs       | 15 +++++++++
 .../Downloaders/MegaMirrorDownloader.cs       | 33 +++++++++++++++++++
 .../Downloaders/MirrorDownloaderBase.cs       | 13 ++++++++
 5 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 SPTInstaller/Interfaces/IMirrorDownloader.cs
 rename SPTInstaller/Models/{ => Mirrors}/DownloadMirror.cs (71%)
 create mode 100644 SPTInstaller/Models/Mirrors/Downloaders/HttpMirrorDownloader.cs
 create mode 100644 SPTInstaller/Models/Mirrors/Downloaders/MegaMirrorDownloader.cs
 create mode 100644 SPTInstaller/Models/Mirrors/Downloaders/MirrorDownloaderBase.cs

diff --git a/SPTInstaller/Interfaces/IMirrorDownloader.cs b/SPTInstaller/Interfaces/IMirrorDownloader.cs
new file mode 100644
index 0000000..1540620
--- /dev/null
+++ b/SPTInstaller/Interfaces/IMirrorDownloader.cs
@@ -0,0 +1,9 @@
+using SPTInstaller.Models.Mirrors;
+using System.Threading.Tasks;
+
+namespace SPTInstaller.Interfaces;
+public interface IMirrorDownloader
+{
+    public DownloadMirror MirrorInfo { get; }
+    public Task<FileInfo?> Download(IProgress<double> progress);
+}
diff --git a/SPTInstaller/Models/DownloadMirror.cs b/SPTInstaller/Models/Mirrors/DownloadMirror.cs
similarity index 71%
rename from SPTInstaller/Models/DownloadMirror.cs
rename to SPTInstaller/Models/Mirrors/DownloadMirror.cs
index 40a83fd..b44a00a 100644
--- a/SPTInstaller/Models/DownloadMirror.cs
+++ b/SPTInstaller/Models/Mirrors/DownloadMirror.cs
@@ -1,4 +1,4 @@
-namespace SPTInstaller.Models;
+namespace SPTInstaller.Models.Mirrors;
 
 public class DownloadMirror
 {
diff --git a/SPTInstaller/Models/Mirrors/Downloaders/HttpMirrorDownloader.cs b/SPTInstaller/Models/Mirrors/Downloaders/HttpMirrorDownloader.cs
new file mode 100644
index 0000000..5a7ca2d
--- /dev/null
+++ b/SPTInstaller/Models/Mirrors/Downloaders/HttpMirrorDownloader.cs
@@ -0,0 +1,15 @@
+using SPTInstaller.Helpers;
+using System.Threading.Tasks;
+
+namespace SPTInstaller.Models.Mirrors.Downloaders;
+public class HttpMirrorDownloader : MirrorDownloaderBase
+{
+    public HttpMirrorDownloader(DownloadMirror mirror) : base(mirror)
+    {
+    }
+
+    public override async Task<FileInfo?> Download(IProgress<double> progress)
+    {
+        return await DownloadCacheHelper.DownloadFileAsync("patcher.zip", MirrorInfo.Link, progress);
+    }
+}
diff --git a/SPTInstaller/Models/Mirrors/Downloaders/MegaMirrorDownloader.cs b/SPTInstaller/Models/Mirrors/Downloaders/MegaMirrorDownloader.cs
new file mode 100644
index 0000000..e4d08c1
--- /dev/null
+++ b/SPTInstaller/Models/Mirrors/Downloaders/MegaMirrorDownloader.cs
@@ -0,0 +1,33 @@
+using CG.Web.MegaApiClient;
+using SPTInstaller.Helpers;
+using System.Threading.Tasks;
+
+namespace SPTInstaller.Models.Mirrors.Downloaders;
+public class MegaMirrorDownloader : MirrorDownloaderBase
+{
+    public MegaMirrorDownloader(DownloadMirror mirrorInfo) : base(mirrorInfo)
+    {
+    }
+
+    public override async Task<FileInfo?> Download(IProgress<double> progress)
+    {
+        var megaClient = new MegaApiClient();
+        await megaClient.LoginAnonymousAsync();
+
+        // if mega fails to connect, just return
+        if (!megaClient.IsLoggedIn)
+            return null;
+
+        try
+        {
+            using var megaDownloadStream = await megaClient.DownloadAsync(new Uri(MirrorInfo.Link), progress);
+
+            return await DownloadCacheHelper.DownloadFileAsync("patcher.zip", megaDownloadStream);
+        }
+        catch
+        {
+            //most likely a 509 (Bandwidth limit exceeded) due to mega's user quotas.
+            return null;
+        }
+    }
+}
diff --git a/SPTInstaller/Models/Mirrors/Downloaders/MirrorDownloaderBase.cs b/SPTInstaller/Models/Mirrors/Downloaders/MirrorDownloaderBase.cs
new file mode 100644
index 0000000..2fb6dcb
--- /dev/null
+++ b/SPTInstaller/Models/Mirrors/Downloaders/MirrorDownloaderBase.cs
@@ -0,0 +1,13 @@
+using SPTInstaller.Interfaces;
+using System.Threading.Tasks;
+
+namespace SPTInstaller.Models.Mirrors.Downloaders;
+public abstract class MirrorDownloaderBase : IMirrorDownloader
+{
+    public DownloadMirror MirrorInfo { get; private set; }
+    public abstract Task<FileInfo?> Download(IProgress<double> progress);
+    public MirrorDownloaderBase(DownloadMirror mirrorInfo)
+    {
+        MirrorInfo = mirrorInfo;
+    }
+}