1 files changed, 40 insertions, 0 deletions
diff --git a/ShareGuard.Web/Api.cs b/ShareGuard.Web/Api.cs
new file mode 100644
index 0000000..990abc9
--- /dev/null
+++ b/ShareGuard.Web/Api.cs
@@ -0,0 +1,40 @@
+namespace ShareGuard.Web;
+
+public static class Api
+{
+    private const string TemplateFilePath = "./wg-quick-template.txt";
+
+    public static async Task Redeem(HttpContext context)
+    {
+        await using var db = new Database();
+        var link = db.Links.FirstOrDefault(link => link.Token == context.Request.RouteValues["token"]!.ToString()
+                                                   && link.PeerPublicKey == null);
+        if (link == null)
+        {
+            context.Response.StatusCode = StatusCodes.Status403Forbidden;
+            await context.Response.WriteAsync("Invalid token.");
+            return;
+        }
+
+        var form = await context.Request.ReadFormAsync();
+        var peerPublicKey = form["PublicKey"];
+        if (peerPublicKey.Count < 1)
+        {
+            context.Response.StatusCode = StatusCodes.Status400BadRequest;
+            await context.Response.WriteAsync("Bad request.");
+            return;
+        }
+
+        link.PeerPublicKey = peerPublicKey[0];
+
+        if (!File.Exists(TemplateFilePath))
+        {
+            context.Response.StatusCode = StatusCodes.Status204NoContent;
+            await context.Response.WriteAsync("Template is not set yet.");
+            return;
+        }
+
+        db.SaveChanges();
+        await context.Response.WriteAsync(File.ReadAllText(TemplateFilePath).Replace("{ip}", link.IpAddress));
+    }
+}
+\ No newline at end of file