Add config file

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();
+        }
+    }
+}