From cf2cfa4853944ce0af6b6c22a089b937dd59ccaf Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 14 Jun 2020 22:18:25 +0800
Subject: feat(back): Add backup service and run it when start.

---
 Timeline/Services/DatabaseBackupService.cs | 35 ++++++++++++++++++++++++++++++
 Timeline/Services/PathProvider.cs          |  6 +++++
 2 files changed, 41 insertions(+)
 create mode 100644 Timeline/Services/DatabaseBackupService.cs

(limited to 'Timeline/Services')

diff --git a/Timeline/Services/DatabaseBackupService.cs b/Timeline/Services/DatabaseBackupService.cs
new file mode 100644
index 00000000..a76b2a0d
--- /dev/null
+++ b/Timeline/Services/DatabaseBackupService.cs
@@ -0,0 +1,35 @@
+using System.Globalization;
+using System.IO;
+
+namespace Timeline.Services
+{
+    public interface IDatabaseBackupService
+    {
+        void BackupNow();
+    }
+
+    public class DatabaseBackupService : IDatabaseBackupService
+    {
+        private readonly IPathProvider _pathProvider;
+        private readonly IClock _clock;
+
+        public DatabaseBackupService(IPathProvider pathProvider, IClock clock)
+        {
+            _pathProvider = pathProvider;
+            _clock = clock;
+        }
+
+        public void BackupNow()
+        {
+            var databasePath = _pathProvider.GetDatabaseFilePath();
+            if (File.Exists(databasePath))
+            {
+                var backupDirPath = _pathProvider.GetDatabaseBackupDirectory();
+                Directory.CreateDirectory(backupDirPath);
+                var fileName = _clock.GetCurrentTime().ToString("yyyy-MM-ddTHH-mm-ss", CultureInfo.InvariantCulture);
+                var path = Path.Combine(backupDirPath, fileName);
+                File.Copy(databasePath, path);
+            }
+        }
+    }
+}
diff --git a/Timeline/Services/PathProvider.cs b/Timeline/Services/PathProvider.cs
index ac7cd800..1baba5c0 100644
--- a/Timeline/Services/PathProvider.cs
+++ b/Timeline/Services/PathProvider.cs
@@ -8,6 +8,7 @@ namespace Timeline.Services
     {
         public string GetWorkingDirectory();
         public string GetDatabaseFilePath();
+        public string GetDatabaseBackupDirectory();
     }
 
     public class PathProvider : IPathProvider
@@ -32,5 +33,10 @@ namespace Timeline.Services
         {
             return Path.Combine(_workingDirectory, ApplicationConfiguration.DatabaseFileName);
         }
+
+        public string GetDatabaseBackupDirectory()
+        {
+            return Path.Combine(_workingDirectory, ApplicationConfiguration.DatabaseBackupDirectoryName);
+        }
     }
 }
-- 
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