Introduce Vexer platform scaffolding and enrich Concelier merge

src/StellaOps.Vexer.Storage.Mongo/MongoVexExportStore.cs

@@ -0,0 +1,46 @@
+using System.Threading;
+using System.Threading.Tasks;
+using MongoDB.Driver;
+using StellaOps.Vexer.Core;
+
+namespace StellaOps.Vexer.Storage.Mongo;
+
+public sealed class MongoVexExportStore : IVexExportStore
+{
+    private readonly IMongoCollection<VexExportManifestRecord> _collection;
+
+    public MongoVexExportStore(IMongoDatabase database)
+    {
+        ArgumentNullException.ThrowIfNull(database);
+        VexMongoMappingRegistry.Register();
+        _collection = database.GetCollection<VexExportManifestRecord>(VexMongoCollectionNames.Exports);
+        EnsureIndexes(_collection);
+    }
+
+    public async ValueTask<VexExportManifest?> FindAsync(VexQuerySignature signature, VexExportFormat format, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(signature);
+        var id = VexExportManifestRecord.CreateId(signature, format);
+        var filter = Builders<VexExportManifestRecord>.Filter.Eq(x => x.Id, id);
+        var entity = await _collection.Find(filter).FirstOrDefaultAsync(cancellationToken).ConfigureAwait(false);
+        return entity?.ToDomain();
+    }
+
+    public async ValueTask SaveAsync(VexExportManifest manifest, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(manifest);
+        var entity = VexExportManifestRecord.FromDomain(manifest);
+        var filter = Builders<VexExportManifestRecord>.Filter.Eq(x => x.Id, entity.Id);
+        await _collection.ReplaceOneAsync(filter, entity, new ReplaceOptions { IsUpsert = true }, cancellationToken)
+            .ConfigureAwait(false);
+    }
+
+    private static void EnsureIndexes(IMongoCollection<VexExportManifestRecord> collection)
+    {
+        var keys = Builders<VexExportManifestRecord>.IndexKeys
+            .Ascending(x => x.QuerySignature)
+            .Ascending(x => x.Format);
+        var model = new CreateIndexModel<VexExportManifestRecord>(keys);
+        _ = collection.Indexes.CreateOne(model);
+    }
+}