Add config file

Elwig/Helpers/AppDbContext.cs

@@ -3,6 +3,7 @@ using Elwig.Models;
 
 namespace Elwig.Helpers {
     public class AppDbContext : DbContext {
+
         public DbSet<Country> Countries { get; set; }
         public DbSet<Member> Members { get; set; }
         public DbSet<BillingAddress> BillingAddresses { get; set; }
@@ -22,7 +23,7 @@ namespace Elwig.Helpers {
         public DbSet<WineVar> WineVarieties { get; set; }
 
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) {
-            optionsBuilder.UseSqlite("Data Source=\"C:\\Users\\lorenz\\Desktop\\wgprod.sqlite3\"; foreign keys=true");
+            optionsBuilder.UseSqlite($"Data Source=\"{App.Config.DatabasePath}\"; Foreign Keys=True; Mode=ReadWrite; Cache=Default");
             optionsBuilder.UseLazyLoadingProxies();
             base.OnConfiguring(optionsBuilder);
         }

Elwig/Helpers/Config.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Text;
+using IniParser;
+using IniParser.Model;
+
+namespace Elwig.Helpers {
+    public class Config {
+
+        private readonly string FileName;
+        public string DatabasePath;
+
+        public Config(string filename) {
+            FileName = filename;
+            Read();
+        }
+
+        public void Read() {
+            var parser = new FileIniDataParser();
+            IniData? ini = null;
+            try {
+                ini = parser.ReadFile(FileName, Encoding.UTF8);
+            } catch {}
+
+            if (ini == null || !ini.TryGetKey("database.path", out string db)) {
+                DatabasePath = App.DataPath + "database.sqlite3";
+            } else if (db.Length > 1 && db[1] == ':') {
+                DatabasePath = db;
+            } else {
+                DatabasePath = App.DataPath + db;
+            }
+        }
+
+        public void Write() {
+            throw new NotImplementedException();
+        }
+    }
+}