implement save as and open buttons

MainWindow.cs

@@ -305,12 +305,12 @@ namespace Buypeeb {
 			}
 		}
 
-		private MessageDialog OkCancelDialogue(string message) {
+		private MessageDialog MsgBox(string message, ButtonsType buttonsType = ButtonsType.OkCancel) {
 			var md = new MessageDialog(
 				parent_window: this,
 				flags: DialogFlags.DestroyWithParent | DialogFlags.Modal,
 				type: MessageType.Question,
-				bt: ButtonsType.OkCancel,
+				bt: buttonsType,
 				format: message
 			);
 			md.KeepAbove = true;
@@ -393,7 +393,7 @@ namespace Buypeeb {
 
 		private void ButtonClearEndedClicked(object sender, EventArgs a) {
 			Console.WriteLine("ButtonClearEndedClicked");
-			var md = this.OkCancelDialogue("Are you sure you want to remove all ended auctions from the list?");
+			var md = this.MsgBox("Are you sure you want to remove all ended auctions from the list?");
 			var r = (ResponseType)md.Run();
 			md.Dispose();
 			if (r != ResponseType.Ok) {
@@ -418,12 +418,73 @@ namespace Buypeeb {
 			Console.WriteLine("ButtonClearAllClicked");
 		}
 
+		private void ButtonOpenClicked(object sender, EventArgs a) {
+			var od = new FileChooserDialog(
+				title: "Open userdata.json",
+				parent: this,
+				action: FileChooserAction.Open,
+				"Cancel", ResponseType.Cancel, "Open", ResponseType.Accept
+			);
+
+			var odf = new FileFilter();
+			odf.Name = "JSON files";
+			odf.AddMimeType("application/json");
+			odf.AddPattern("*.json");
+			od.AddFilter(odf);
+
+			if (od.Run() == (int)ResponseType.Accept) {
+				try {
+					string j = File.ReadAllText(od.Filename);
+					this.settings = JsonSerializer.Deserialize<Settings>(j);
+					this.RenderList();
+					this.UpdateItems();
+				}
+				catch (Exception e) {
+					Console.WriteLine(e);
+					MsgBox($"Failed to load {od.Filename}!\n{e.Message}");
+				}
+			}
+			od.Dispose();
+		}
+
 		private void ButtonSaveClicked(object sender, EventArgs a) {
 			this.SaveSettings();
 		}
 
+		private void ButtonSaveAsClicked(object sender, EventArgs a) {
+			var sd = new FileChooserDialog(
+				title: "Save userdata.json",
+				parent: this,
+				action: FileChooserAction.Save,
+				"Cancel", ResponseType.Cancel, "Save", ResponseType.Accept
+			);
+			sd.CurrentName = "userdata.json";
+
+			var sdf = new FileFilter();
+			sdf.Name = "JSON files";
+			sdf.AddMimeType("application/json");
+			sdf.AddPattern("*.json");
+			sd.AddFilter(sdf);
+
+			if (sd.Run() == (int)ResponseType.Accept) {
+				try {
+					if (!File.Exists(sd.Filename)) {
+						var fs = File.CreateText(sd.Filename);
+						fs.Close();
+					}
+					File.WriteAllText(sd.Filename, JsonSerializer.Serialize(this.settings));
+				}
+				catch (Exception e) {
+					Console.WriteLine(e);
+					MsgBox($"Failed to write {sd.Filename}!\n{e.Message}.", ButtonsType.Ok);
+				}
+			}
+
+			sd.Dispose();
+		}
+
 		private void ButtonQuitClicked(object sender, EventArgs a) {
-			var md = this.OkCancelDialogue("Are you sure you want to quit?");
+			var md = this.MsgBox("Are you sure you want to quit?");
 
 			ResponseType response = (ResponseType)md.Run();
 			md.Dispose();
@@ -448,7 +509,7 @@ namespace Buypeeb {
 		private void ButtonSelectedRemoveClicked(object sender, EventArgs a) {
 			var item = this.selectedItem;
 
-			var md = this.OkCancelDialogue($"Are you sure you want to remove the item \"{item.name}\"?"); // TODO: this looks bad being all on one line
+			var md = this.MsgBox($"Are you sure you want to remove the item \"{item.name}\"?"); // TODO: this looks bad being all on one line
 
 			ResponseType response = (ResponseType)md.Run();
 			md.Dispose();

ui/main.glade

@@ -152,12 +152,12 @@
                     <child>
                       <object class="GtkToolButton">
                         <property name="visible">True</property>
-                        <property name="sensitive">False</property>
                         <property name="can_focus">False</property>
                         <property name="tooltip_text" translatable="yes">Open</property>
                         <property name="label" translatable="yes">Open</property>
                         <property name="use_underline">True</property>
                         <property name="stock_id">gtk-open</property>
+                        <signal name="clicked" handler="ButtonOpenClicked" swapped="no"/>
                         <accelerator key="o" signal="clicked" modifiers="GDK_CONTROL_MASK"/>
                       </object>
                       <packing>
@@ -184,12 +184,12 @@
                     <child>
                       <object class="GtkToolButton">
                         <property name="visible">True</property>
-                        <property name="sensitive">False</property>
                         <property name="can_focus">False</property>
                         <property name="tooltip_text" translatable="yes">Export as...</property>
                         <property name="label" translatable="yes">Export as...</property>
                         <property name="use_underline">True</property>
                         <property name="stock_id">gtk-save-as</property>
+                        <signal name="clicked" handler="ButtonSaveAsClicked" swapped="no"/>
                         <accelerator key="e" signal="clicked" modifiers="GDK_SHIFT_MASK | GDK_CONTROL_MASK"/>
                       </object>
                       <packing>