SPMS.API/Controllers/MessageController.cs

@@ -41,7 +41,7 @@ public class MessageController : ControllerBase
     }
 
     [HttpPost("info")]
-    [SwaggerOperation(Summary = "메시지 상세 조회", Description = "메시지 코드로 상세 정보를 조회합니다. 템플릿 변수 목록을 포함합니다.")]
+    [SwaggerOperation(Summary = "메시지 상세 조회", Description = "메시지 코드로 상세 정보를 조회합니다. 서비스 정보(service_name, service_code), 작성자(created_by_name), 발송 상태(latest_send_status), 템플릿 변수 목록을 포함합니다.")]
     public async Task<IActionResult> GetInfoAsync([FromBody] MessageInfoRequestDto request)
     {
         var serviceId = GetServiceId();
@@ -67,7 +67,7 @@ public class MessageController : ControllerBase
     }
 
     [HttpPost("preview")]
-    [SwaggerOperation(Summary = "메시지 미리보기", Description = "메시지 템플릿에 변수를 치환하여 미리보기를 생성합니다.")]
+    [SwaggerOperation(Summary = "메시지 미리보기", Description = "메시지 템플릿에 변수를 치환하여 미리보기를 생성합니다. 응답에 link_type을 포함합니다.")]
     public async Task<IActionResult> PreviewAsync([FromBody] MessagePreviewRequestDto request)
     {
         var serviceId = GetServiceId();

SPMS.Application/DTOs/Message/MessageInfoResponseDto.cs

@@ -31,6 +31,18 @@ public class MessageInfoResponseDto
     [JsonPropertyName("is_active")]
     public bool IsActive { get; set; }
 
+    [JsonPropertyName("service_name")]
+    public string ServiceName { get; set; } = string.Empty;
+
+    [JsonPropertyName("service_code")]
+    public string ServiceCode { get; set; } = string.Empty;
+
+    [JsonPropertyName("created_by_name")]
+    public string CreatedByName { get; set; } = string.Empty;
+
+    [JsonPropertyName("latest_send_status")]
+    public string LatestSendStatus { get; set; } = "pending";
+
     [JsonPropertyName("created_at")]
     public DateTime CreatedAt { get; set; }
 }

SPMS.Application/DTOs/Message/MessagePreviewRequestDto.cs

@@ -1,11 +1,12 @@
-using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
 
 namespace SPMS.Application.DTOs.Message;
 
 public class MessagePreviewRequestDto
 {
-    [Required]
+    [JsonPropertyName("message_code")]
     public string MessageCode { get; set; } = string.Empty;
 
+    [JsonPropertyName("variables")]
     public Dictionary<string, string>? Variables { get; set; }
 }

SPMS.Application/DTOs/Message/MessagePreviewResponseDto.cs

@@ -1,9 +1,21 @@
+using System.Text.Json.Serialization;
+
 namespace SPMS.Application.DTOs.Message;
 
 public class MessagePreviewResponseDto
 {
+    [JsonPropertyName("title")]
     public string Title { get; set; } = string.Empty;
+
+    [JsonPropertyName("body")]
     public string Body { get; set; } = string.Empty;
+
+    [JsonPropertyName("image_url")]
     public string? ImageUrl { get; set; }
+
+    [JsonPropertyName("link_url")]
     public string? LinkUrl { get; set; }
+
+    [JsonPropertyName("link_type")]
+    public string? LinkType { get; set; }
 }

SPMS.Application/Services/MessageService.cs

@@ -107,7 +107,7 @@ public class MessageService : IMessageService
         if (string.IsNullOrWhiteSpace(request.MessageCode))
             throw new SpmsException(ErrorCodes.BadRequest, "메시지 코드는 필수입니다.", 400);
 
-        var message = await _messageRepository.GetByMessageCodeAndServiceAsync(request.MessageCode, serviceId);
+        var message = await _messageRepository.GetByMessageCodeWithDetailsAsync(request.MessageCode, serviceId);
         if (message == null)
             throw new SpmsException(ErrorCodes.MessageNotFound, "존재하지 않는 메시지 코드입니다.", 404);
 
@@ -119,6 +119,8 @@ public class MessageService : IMessageService
             data = JsonSerializer.Deserialize<JsonElement>(message.CustomData);
         }
 
+        var (totalSend, successCount) = await _messageRepository.GetSendStatsAsync(message.Id);
+
         return new MessageInfoResponseDto
         {
             MessageCode = message.MessageCode,
@@ -130,6 +132,10 @@ public class MessageService : IMessageService
             Data = data,
             Variables = variables,
             IsActive = !message.IsDeleted,
+            ServiceName = message.Service.ServiceName,
+            ServiceCode = message.Service.ServiceCode,
+            CreatedByName = message.CreatedByAdmin.Name,
+            LatestSendStatus = DetermineSendStatus(totalSend, successCount),
             CreatedAt = message.CreatedAt
         };
     }
@@ -163,7 +169,8 @@ public class MessageService : IMessageService
             Title = title,
             Body = body,
             ImageUrl = message.ImageUrl,
-            LinkUrl = message.LinkUrl
+            LinkUrl = message.LinkUrl,
+            LinkType = message.LinkType
         };
     }
 

SPMS.Domain/Interfaces/IMessageRepository.cs

@@ -14,6 +14,8 @@ public interface IMessageRepository : IRepository<Message>
     Task<(IReadOnlyList<MessageListProjection> Items, int TotalCount)> GetPagedForListAsync(
         long? serviceId, int page, int size,
         string? keyword = null, bool? isActive = null, string? sendStatus = null);
+    Task<Message?> GetByMessageCodeWithDetailsAsync(string messageCode, long serviceId);
+    Task<(int TotalSendCount, int SuccessCount)> GetSendStatsAsync(long messageId);
 }
 
 public class MessageListProjection

SPMS.Infrastructure/Persistence/Repositories/MessageRepository.cs

@@ -54,6 +54,29 @@ public class MessageRepository : Repository<Message>, IMessageRepository
         return (items, totalCount);
     }
 
+    public async Task<Message?> GetByMessageCodeWithDetailsAsync(string messageCode, long serviceId)
+    {
+        return await _dbSet
+            .Include(m => m.Service)
+            .Include(m => m.CreatedByAdmin)
+            .FirstOrDefaultAsync(m => m.MessageCode == messageCode && m.ServiceId == serviceId && !m.IsDeleted);
+    }
+
+    public async Task<(int TotalSendCount, int SuccessCount)> GetSendStatsAsync(long messageId)
+    {
+        var stats = await _context.PushSendLogs
+            .Where(l => l.MessageId == messageId)
+            .GroupBy(_ => 1)
+            .Select(g => new
+            {
+                Total = g.Count(),
+                Success = g.Count(l => l.Status == PushResult.Success)
+            })
+            .FirstOrDefaultAsync();
+
+        return stats != null ? (stats.Total, stats.Success) : (0, 0);
+    }
+
     public async Task<(IReadOnlyList<MessageListProjection> Items, int TotalCount)> GetPagedForListAsync(
         long? serviceId, int page, int size,
         string? keyword = null, bool? isActive = null, string? sendStatus = null)