feat(dtos): add PresentMapper.ToWire(ViewerPresent)

SVSim.EmulatedEntrypoint/Mapping/PresentMapper.cs

@@ -0,0 +1,30 @@
+using System.Globalization;
+using SVSim.Database.Models;
+using SVSim.EmulatedEntrypoint.Models.Dtos.Common;
+
+namespace SVSim.EmulatedEntrypoint.Mapping;
+
+internal static class PresentMapper
+{
+    /// <summary>
+    /// Project a ViewerPresent row onto the wire DTO. Field-by-field stringification matches
+    /// the prod capture at data_dumps/captures/traffic_event_crate_free_pack.ndjson:
+    ///   - present_id, reward_type, reward_detail_id, reward_count, condition_number,
+    ///     present_limit_type — STRINGS on the wire.
+    ///   - reward_limit_time, item_type — INTS on the wire.
+    ///   - create_time — "yyyy-MM-dd HH:mm:ss" string, gift's row-creation time (NOT now()).
+    /// </summary>
+    public static PresentDto ToWire(ViewerPresent row) => new()
+    {
+        PresentId        = row.PresentId,
+        RewardType       = row.RewardType.ToString(CultureInfo.InvariantCulture),
+        RewardDetailId   = row.RewardDetailId.ToString(CultureInfo.InvariantCulture),
+        RewardCount      = row.RewardCount.ToString(CultureInfo.InvariantCulture),
+        ConditionNumber  = row.ConditionNumber.ToString(CultureInfo.InvariantCulture),
+        PresentLimitType = row.PresentLimitType.ToString(CultureInfo.InvariantCulture),
+        RewardLimitTime  = (int)row.RewardLimitTime,
+        CreateTime       = row.CreatedAt.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture),
+        ItemType         = row.ItemType,
+        Message          = row.Message,
+    };
+}