Elwig: Add BackupService

Elwig/Helpers/Config.cs

@@ -48,8 +48,17 @@ namespace Elwig.Helpers {
         public string? DatabaseLog = null;
         public string? Branch = null;
         public WeighingMode? WeighingMode;
+
+        public bool BackupAuto = true;
+        public string BackupPath = Path.Combine(App.DataPath, "backups");
+        public int BackupRetainHours = 36;
+        public int BackupRetainDays = 8;
+        public int BackupRetainWeeks = 6;
+        public int BackupRetainMonths = 18;
+
         public string? UpdateUrl = null;
         public bool UpdateAuto = false;
+
         public string? SyncUrl = null;
         public string SyncUsername = "";
         public string SyncPassword = "";
@@ -85,8 +94,17 @@ namespace Elwig.Helpers {
             Debug = TrueValues.Contains(config["general:debug"]?.ToLower());
             var weighing = config["general:weighing"];
             WeighingMode = weighing != null && Enum.TryParse<WeighingMode>(weighing, true, out var w) ? w : null;
+
+            BackupAuto = !FalseValues.Contains(config["backup:auto"]?.ToLower());
+            BackupPath = Path.Combine(Path.GetDirectoryName(DatabaseFile) ?? App.DataPath, config["backup:path"] ?? "backups");
+            BackupRetainHours = int.TryParse(config["backup:retain_hours"], out var hours) ? hours : 36;
+            BackupRetainDays = int.TryParse(config["backup:retain_days"], out var days) ? days : 8;
+            BackupRetainWeeks = int.TryParse(config["backup:retain_weeks"], out var weeks) ? weeks : 6;
+            BackupRetainMonths = int.TryParse(config["backup:retain_months"], out var months) ? months : 18;
+
             UpdateUrl = config["update:url"];
             UpdateAuto = TrueValues.Contains(config["update:auto"]?.ToLower());
+
             SyncUrl = config["sync:url"];
             SyncUsername = config["sync:username"] ?? "";
             SyncPassword = config["sync:password"] ?? "";

Elwig/Helpers/Export/Database.cs

@@ -18,73 +18,85 @@ namespace Elwig.Helpers.Export {
         }
 
         public static async Task ExportSqlite(string filename, bool zipFile) {
-            if (zipFile) {
-                File.Delete(filename);
-                using var zip = ZipFile.Open(filename, ZipArchiveMode.Create);
+            var tmp = filename + ".tmp";
+            try {
+                File.Delete(tmp);
+                if (zipFile) {
+                    using var zip = ZipFile.Open(tmp, ZipArchiveMode.Create);
 
-                var version = zip.CreateEntry("version", CompressionLevel.NoCompression);
-                using (var writer = new StreamWriter(version.Open(), Utils.UTF8)) {
-                    await writer.WriteAsync("elwig:1");
+                    var version = zip.CreateEntry("version", CompressionLevel.NoCompression);
+                    using (var writer = new StreamWriter(version.Open(), Utils.UTF8)) {
+                        await writer.WriteAsync("elwig:1");
+                    }
+
+                    var (applId, userVers, schemaVers, size) = await GetMeta();
+                    var meta = zip.CreateEntry("meta.json", CompressionLevel.NoCompression);
+                    using (var writer = new StreamWriter(meta.Open(), Utils.UTF8)) {
+                        var obj = new JsonObject {
+                            ["timestamp"] = $"{DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ}",
+                            ["zwstid"] = App.ZwstId,
+                            ["device"] = Environment.MachineName,
+                            ["database"] = new JsonObject {
+                                ["application_id"] = applId,
+                                ["user_version"] = userVers,
+                                ["schema_version"] = schemaVers,
+                                ["file_size"] = size,
+                            },
+                        };
+                        await writer.WriteAsync(obj.ToJsonString(Utils.JsonOpts));
+                    }
+
+                    var db = zip.CreateEntryFromFile(App.Config.DatabaseFile, "database.sqlite3", CompressionLevel.SmallestSize);
+                } else {
+                    File.Copy(App.Config.DatabaseFile, tmp);
                 }
-
-                var (applId, userVers, schemaVers, size) = await GetMeta();
-                var meta = zip.CreateEntry("meta.json", CompressionLevel.NoCompression);
-                using (var writer = new StreamWriter(meta.Open(), Utils.UTF8)) {
-                    var obj = new JsonObject {
-                        ["timestamp"] = $"{DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ}",
-                        ["zwstid"] = App.ZwstId,
-                        ["device"] = Environment.MachineName,
-                        ["database"] = new JsonObject {
-                            ["application_id"] = applId,
-                            ["user_version"] = userVers,
-                            ["schema_version"] = schemaVers,
-                            ["file_size"] = size,
-                        },
-                    };
-                    await writer.WriteAsync(obj.ToJsonString(Utils.JsonOpts));
-                }
-
-                var db = zip.CreateEntryFromFile(App.Config.DatabaseFile, "database.sqlite3", CompressionLevel.SmallestSize);
-            } else {
-                File.Copy(App.Config.DatabaseFile, filename, true);
+                File.Move(tmp, filename, true);
+            } finally {
+                File.Delete(tmp);
             }
         }
 
         public static async Task ExportSql(string filename, bool zipFile) {
-            if (zipFile) {
-                File.Delete(filename);
-                using var zip = ZipFile.Open(filename, ZipArchiveMode.Create);
+            var tmp = filename + ".tmp";
+            try {
+                File.Delete(tmp);
+                if (zipFile) {
+                    using var zip = ZipFile.Open(tmp, ZipArchiveMode.Create);
 
-                var version = zip.CreateEntry("version", CompressionLevel.NoCompression);
-                using (var writer = new StreamWriter(version.Open(), Utils.UTF8)) {
-                    await writer.WriteAsync("elwig:1");
-                }
+                    var version = zip.CreateEntry("version", CompressionLevel.NoCompression);
+                    using (var writer = new StreamWriter(version.Open(), Utils.UTF8)) {
+                        await writer.WriteAsync("elwig:1");
+                    }
 
-                var (applId, userVers, schemaVers, size) = await GetMeta();
-                var meta = zip.CreateEntry("meta.json", CompressionLevel.NoCompression);
-                using (var writer = new StreamWriter(meta.Open(), Utils.UTF8)) {
-                    var obj = new JsonObject {
-                        ["timestamp"] = $"{DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ}",
-                        ["zwstid"] = App.ZwstId,
-                        ["device"] = Environment.MachineName,
-                        ["database"] = new JsonObject {
-                            ["application_id"] = applId,
-                            ["user_version"] = userVers,
-                            ["schema_version"] = schemaVers,
-                            ["file_size"] = size,
-                        },
-                    };
-                    await writer.WriteAsync(obj.ToJsonString(Utils.JsonOpts));
-                }
+                    var (applId, userVers, schemaVers, size) = await GetMeta();
+                    var meta = zip.CreateEntry("meta.json", CompressionLevel.NoCompression);
+                    using (var writer = new StreamWriter(meta.Open(), Utils.UTF8)) {
+                        var obj = new JsonObject {
+                            ["timestamp"] = $"{DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ}",
+                            ["zwstid"] = App.ZwstId,
+                            ["device"] = Environment.MachineName,
+                            ["database"] = new JsonObject {
+                                ["application_id"] = applId,
+                                ["user_version"] = userVers,
+                                ["schema_version"] = schemaVers,
+                                ["file_size"] = size,
+                            },
+                        };
+                        await writer.WriteAsync(obj.ToJsonString(Utils.JsonOpts));
+                    }
 
-                var sql = zip.CreateEntry("database.sql", CompressionLevel.SmallestSize);
-                using (var writer = new StreamWriter(sql.Open(), Utils.UTF8)) {
+                    var sql = zip.CreateEntry("database.sql", CompressionLevel.SmallestSize);
+                    using (var writer = new StreamWriter(sql.Open(), Utils.UTF8)) {
+                        await ExportSql(writer);
+                    }
+                } else {
+                    using var stream = File.OpenWrite(tmp);
+                    using var writer = new StreamWriter(stream, Utils.UTF8);
                     await ExportSql(writer);
                 }
-            } else {
-                using var stream = File.OpenWrite(filename);
-                using var writer = new StreamWriter(stream, Utils.UTF8);
-                await ExportSql(writer);
+                File.Move(tmp, filename, true);
+            } finally {
+                File.Delete(tmp);
             }
         }
 

Elwig/Helpers/Extensions.cs

@@ -1,6 +1,7 @@
 using Microsoft.Data.Sqlite;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.IO.Compression;
 using System.IO.Hashing;
@@ -171,5 +172,12 @@ namespace Elwig.Helpers {
             grid.Children.Add(tb);
         }
 
+        public static (int Year, int Week) GetYearAndWeek(this DateTime date) {
+            return (ISOWeek.GetYear(date), ISOWeek.GetWeekOfYear(date));
+        }
+
+        public static (int Year, int Tertial) GetYearAndTertial(this DateTime date) {
+            return (date.Month <= 7 ? date.Year - 1 : date.Year, date.Month == 12 || date.Month <= 3 ? 2 : date.Month <= 7 ? 3 : 1);
+        }
     }
 }

Elwig/Helpers/Printing/Pdf.cs

@@ -1,20 +1,17 @@
 using Elwig.Services;
 using Elwig.Windows;
 using System;
-using System.Threading.Tasks;
 
 namespace Elwig.Helpers.Printing {
     public static class Pdf {
 
-        public static Task Init(Action? evtHandler = null) {
+        public static void Init(Action? evtHandler = null) {
             PdfiumNative.FPDF_InitLibrary();
             evtHandler?.Invoke();
-            return Task.CompletedTask;
         }
 
-        public static Task Cleanup() {
+        public static void Cleanup() {
             PdfiumNative.FPDF_DestroyLibrary();
-            return Task.CompletedTask;
         }
 
         public static void Show(TempFile file, string title) {
@@ -31,14 +28,13 @@ namespace Elwig.Helpers.Printing {
             });
         }
 
-        public static Task Print(string path, int copies = 1, bool doublePaged = false) {
+        public static void Print(string path, int copies = 1, bool doublePaged = false) {
             try {
                 var printer = new PdfPrinter();
                 printer.Print(path, copies, doublePaged);
             } catch (Exception exc) {
                 InteractionService.ShowException("Fehler beim Drucken", "Beim Drucken ist ein Fehler aufgetreten", exc);
             }
-            return Task.CompletedTask;
         }
     }
 }