1 files changed, 82 insertions, 0 deletions
diff --git a/src/SMAPI.Mods.SaveBackup/ModEntry.cs b/src/SMAPI.Mods.SaveBackup/ModEntry.cs
new file mode 100644
index 00000000..e9e62752
--- /dev/null
+++ b/src/SMAPI.Mods.SaveBackup/ModEntry.cs
@@ -0,0 +1,82 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using StardewModdingAPI.Mods.SaveBackup.Framework;
+using StardewValley;
+
+namespace StardewModdingAPI.Mods.SaveBackup
+{
+    /// <summary>The main entry point for the mod.</summary>
+    public class ModEntry : Mod
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The name of the save archive to create.</summary>
+        private readonly string FileName = $"{DateTime.UtcNow:yyyy-MM-dd} - SMAPI {Constants.ApiVersion} with Stardew Valley {Game1.version}.zip";
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>The mod entry point, called after the mod is first loaded.</summary>
+        /// <param name="helper">Provides simplified APIs for writing mods.</param>
+        public override void Entry(IModHelper helper)
+        {
+            try
+            {
+                // read config
+                ModConfig config = this.Helper.ReadConfig<ModConfig>();
+
+                // init backup folder
+                DirectoryInfo folder = new DirectoryInfo(Path.Combine(this.Helper.DirectoryPath, "backups"));
+                folder.Create();
+
+                // back up saves
+                {
+                    FileInfo file = new FileInfo(Path.Combine(folder.FullName, this.FileName));
+                    if (!file.Exists)
+                    {
+                        this.Monitor.Log($"Adding {file.Name}...", LogLevel.Trace);
+                        ZipFile.CreateFromDirectory(Constants.SavesPath, file.FullName, CompressionLevel.Fastest, includeBaseDirectory: false);
+                    }
+                }
+
+                // prune old saves
+                foreach (FileInfo file in this.GetOldBackups(folder, config.BackupsToKeep))
+                {
+                    try
+                    {
+                        this.Monitor.Log($"Deleting {file.Name}...", LogLevel.Trace);
+                        file.Delete();
+                    }
+                    catch (Exception ex)
+                    {
+                        this.Monitor.Log($"Error deleting old save backup '{file.Name}': {ex}");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                this.Monitor.Log($"Error backing up saves: {ex}");
+            }
+        }
+
+
+        /*********
+        ** Private methods
+        *********/
+        /// <summary>Get backups ordered by creation date.</summary>
+        /// <param name="folder">The folder to search.</param>
+        /// <param name="skip">The number of backups to skip.</param>
+        private IEnumerable<FileInfo> GetOldBackups(DirectoryInfo folder, int skip)
+        {
+            return folder
+                .GetFiles()
+                .OrderByDescending(p => p.CreationTimeUtc)
+                .Skip(skip);
+        }
+    }
+}