From c3ba9fa85a620950329b9b378e0c360c1fac8bae Mon Sep 17 00:00:00 2001
From: moreal <dev.moreal@gmail.com>
Date: Thu, 16 May 2024 04:12:40 +0900
Subject: [PATCH] feat(api): provide tip index

---
 Mimir/Controllers/MetadataController.cs  | 19 +++++++++++++++++
 Mimir/Models/Metadata/GetTipResponse.cs  |  5 +++++
 Mimir/Program.cs                         |  1 +
 Mimir/Repositories/MetadataRepository.cs | 26 ++++++++++++++++++++++++
 4 files changed, 51 insertions(+)
 create mode 100644 Mimir/Controllers/MetadataController.cs
 create mode 100644 Mimir/Models/Metadata/GetTipResponse.cs
 create mode 100644 Mimir/Repositories/MetadataRepository.cs

diff --git a/Mimir/Controllers/MetadataController.cs b/Mimir/Controllers/MetadataController.cs
new file mode 100644
index 00000000..24791fd7
--- /dev/null
+++ b/Mimir/Controllers/MetadataController.cs
@@ -0,0 +1,19 @@
+using Microsoft.AspNetCore.Mvc;
+using Mimir.Models.Metadata;
+using Mimir.Repositories;
+
+namespace Mimir.Controllers;
+
+[ApiController]
+[Route("{network}")]
+public class MetadataController : ControllerBase
+{
+    [HttpGet("tip")]
+    public async Task<GetTipResponse> GetTip(
+        string network,
+        MetadataRepository metadataRepository
+    )
+    {
+        return new GetTipResponse(await metadataRepository.GetLatestBlockIndex(network));
+    }
+}
diff --git a/Mimir/Models/Metadata/GetTipResponse.cs b/Mimir/Models/Metadata/GetTipResponse.cs
new file mode 100644
index 00000000..d4156d2e
--- /dev/null
+++ b/Mimir/Models/Metadata/GetTipResponse.cs
@@ -0,0 +1,5 @@
+namespace Mimir.Models.Metadata;
+
+public record GetTipResponse(
+    long Index
+);
\ No newline at end of file
diff --git a/Mimir/Program.cs b/Mimir/Program.cs
index aae4bfaf..fa1c2b5a 100644
--- a/Mimir/Program.cs
+++ b/Mimir/Program.cs
@@ -27,6 +27,7 @@
 builder.Services.AddSingleton<ArenaRankingRepository>();
 builder.Services.AddSingleton<TableSheetsRepository>();
 builder.Services.AddSingleton<AvatarRepository>();
+builder.Services.AddSingleton<MetadataRepository>();
 builder.Services.AddControllers();
 builder.Services.AddHeadlessGQLClient()
     .ConfigureHttpClient((provider, client) =>
diff --git a/Mimir/Repositories/MetadataRepository.cs b/Mimir/Repositories/MetadataRepository.cs
new file mode 100644
index 00000000..bc274136
--- /dev/null
+++ b/Mimir/Repositories/MetadataRepository.cs
@@ -0,0 +1,26 @@
+using Mimir.Models.Avatar;
+using Mimir.Services;
+using MongoDB.Bson;
+using MongoDB.Driver;
+
+namespace Mimir.Repositories;
+
+public class MetadataRepository : BaseRepository<BsonDocument>
+{
+    public MetadataRepository(MongoDBCollectionService mongoDBCollectionService)
+        : base(mongoDBCollectionService)
+    {
+    }
+
+    protected override string GetCollectionName()
+    {
+        return "metadata";
+    }
+
+    public async Task<long> GetLatestBlockIndex(string network)
+    {
+        var filter = Builders<BsonDocument>.Filter.Eq("_id", "SyncContext");
+        var doc = await GetCollection(network).FindSync(filter).FirstAsync();
+        return doc.GetValue("LatestBlockIndex").AsInt64;
+    }
+}