added user presets

main.go

@@ -72,6 +72,12 @@ type presetEntry struct {
 	Path string
 }
 
+type presetInfo struct {
+	Name   string
+	Path   string
+	Source string
+}
+
 func listEmbeddedPresets() ([]presetEntry, error) {
 	entries, err := fs.ReadDir(embeddedPresets, "Presets")
 	if err != nil {
@@ -106,6 +112,102 @@ func loadEmbeddedPreset(path string) (*Settings, error) {
 	return decodeSettingsJSON(raw)
 }
 
+func listUserPresets(dir string) ([]presetEntry, error) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return []presetEntry{}, nil
+		}
+		return nil, err
+	}
+	var presets []presetEntry
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		name := entry.Name()
+		if !strings.HasSuffix(strings.ToLower(name), ".json") {
+			continue
+		}
+		displayName := strings.TrimSuffix(name, filepath.Ext(name))
+		presets = append(presets, presetEntry{
+			Name: displayName,
+			Path: filepath.Join(dir, name),
+		})
+	}
+	sort.Slice(presets, func(i, j int) bool {
+		return presets[i].Name < presets[j].Name
+	})
+	return presets, nil
+}
+
+func buildPresetOptions(settings *Settings, userPresetDir string) ([]string, map[string]presetInfo) {
+	hidden := map[string]bool{}
+	for _, name := range settings.HiddenPresets {
+		hidden[name] = true
+	}
+
+	info := map[string]presetInfo{}
+	var names []string
+
+	embedded, err := listEmbeddedPresets()
+	if err != nil {
+		log.Println("Error loading embedded presets:", err)
+	} else {
+		for _, preset := range embedded {
+			if hidden[preset.Name] {
+				continue
+			}
+			info[preset.Name] = presetInfo{
+				Name:   preset.Name,
+				Path:   preset.Path,
+				Source: "embedded",
+			}
+			names = append(names, preset.Name)
+		}
+	}
+
+	userPresets, err := listUserPresets(userPresetDir)
+	if err != nil {
+		log.Println("Error loading user presets:", err)
+	} else {
+		for _, preset := range userPresets {
+			if _, exists := info[preset.Name]; exists {
+				continue
+			}
+			info[preset.Name] = presetInfo{
+				Name:   preset.Name,
+				Path:   preset.Path,
+				Source: "user",
+			}
+			names = append(names, preset.Name)
+		}
+	}
+
+	sort.Strings(names)
+	return append([]string{"No Preset"}, names...), info
+}
+
+func savePresetToFile(path string, settings *Settings) error {
+	raw, err := json.Marshal(settings)
+	if err != nil {
+		return err
+	}
+	var data map[string]any
+	if err := json.Unmarshal(raw, &data); err != nil {
+		return err
+	}
+	delete(data, "seed")
+	delete(data, "last_export_path")
+	delete(data, "image_view_state")
+
+	pretty, err := json.MarshalIndent(data, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, pretty, 0644)
+}
+
 func main() {
 	// Initialize the Fyne application and window
 	a := app.NewWithID("com.example.rpgcitymaker")
@@ -1651,26 +1753,38 @@ func main() {
 		updateGenerateBtnState()
 	}
 
-	presetEntries, err := listEmbeddedPresets()
-	if err != nil {
-		log.Println("Error loading embedded presets:", err)
-	}
-	presetNames := []string{"No Preset"}
-	presetPathByName := map[string]string{}
-	for _, preset := range presetEntries {
-		presetNames = append(presetNames, preset.Name)
-		presetPathByName[preset.Name] = preset.Path
-	}
-	presetSelect := widget.NewSelect(presetNames, func(name string) {
-		if name == "" || name == "No Preset" {
+	presetDir := filepath.Join(appConfigDir, "presets")
+	var presetInfoByName map[string]presetInfo
+	var suppressPresetApply bool
+	var removePresetBtn *widget.Button
+
+	presetSelect := widget.NewSelect([]string{"No Preset"}, func(name string) {
+		if suppressPresetApply {
 			return
 		}
-		path, ok := presetPathByName[name]
+		if name == "" || name == "No Preset" {
+			if removePresetBtn != nil {
+				removePresetBtn.Disable()
+			}
+			return
+		}
+		info, ok := presetInfoByName[name]
 		if !ok {
 			return
 		}
 		applyingPreset = true
-		imported, err := loadEmbeddedPreset(path)
+		var imported *Settings
+		var err error
+		if info.Source == "embedded" {
+			imported, err = loadEmbeddedPreset(info.Path)
+		} else {
+			raw, readErr := os.ReadFile(info.Path)
+			if readErr != nil {
+				err = readErr
+			} else {
+				imported, err = decodeSettingsJSON(raw)
+			}
+		}
 		if err != nil {
 			applyingPreset = false
 			dialog.ShowError(err, w)
@@ -1683,6 +1797,9 @@ func main() {
 				applyingPreset = false
 			})
 		})
+		if removePresetBtn != nil {
+			removePresetBtn.Enable()
+		}
 	})
 	presetSelect.SetSelected("No Preset")
 	clearPresetSelection = func() {
@@ -1691,6 +1808,121 @@ func main() {
 		}
 	}
 
+	refreshPresetOptions := func(selectName string) {
+		names, info := buildPresetOptions(settings, presetDir)
+		presetInfoByName = info
+		suppressPresetApply = true
+		presetSelect.Options = names
+		presetSelect.Refresh()
+
+		if selectName == "" {
+			selectName = presetSelect.Selected
+		}
+		if _, ok := presetInfoByName[selectName]; !ok {
+			selectName = "No Preset"
+		}
+		presetSelect.SetSelected(selectName)
+		if removePresetBtn != nil {
+			if selectName == "" || selectName == "No Preset" {
+				removePresetBtn.Disable()
+			} else {
+				removePresetBtn.Enable()
+			}
+		}
+		suppressPresetApply = false
+	}
+
+	addPresetBtn := widget.NewButton("Add Preset", func() {
+		nameEntry := widget.NewEntry()
+		nameEntry.SetPlaceHolder("Preset Name")
+
+		content := container.NewVBox(
+			widget.NewLabel("Preset Name:"),
+			nameEntry,
+		)
+
+		var addDialog *dialog.CustomDialog
+		saveBtn := widget.NewButton("Save", func() {
+			name := strings.TrimSpace(nameEntry.Text)
+			if name == "" || name == "No Preset" {
+				return
+			}
+			if strings.ContainsAny(name, "/\\") {
+				dialog.ShowError(fmt.Errorf("preset name cannot contain path separators"), w)
+				return
+			}
+			if _, exists := presetInfoByName[name]; exists {
+				dialog.ShowError(fmt.Errorf("preset name already exists"), w)
+				return
+			}
+			if err := os.MkdirAll(presetDir, 0755); err != nil {
+				dialog.ShowError(err, w)
+				return
+			}
+			filePath := filepath.Join(presetDir, name+".json")
+			if err := savePresetToFile(filePath, settings); err != nil {
+				dialog.ShowError(err, w)
+				return
+			}
+			refreshPresetOptions(name)
+			if addDialog != nil {
+				addDialog.Hide()
+			}
+		})
+		saveBtn.Disable()
+
+		nameEntry.OnChanged = func(text string) {
+			if strings.TrimSpace(text) == "" {
+				saveBtn.Disable()
+			} else {
+				saveBtn.Enable()
+			}
+		}
+
+		addDialog = dialog.NewCustom("Add Preset", "Cancel", content, w)
+		addDialog.SetButtons([]fyne.CanvasObject{
+			widget.NewButton("Cancel", func() {
+				addDialog.Hide()
+			}),
+			saveBtn,
+		})
+		addDialog.Show()
+	})
+
+	removePresetBtn = widget.NewButton("Remove Preset", func() {
+		name := presetSelect.Selected
+		if name == "" || name == "No Preset" {
+			return
+		}
+		info, ok := presetInfoByName[name]
+		if !ok {
+			return
+		}
+		if info.Source == "embedded" {
+			found := false
+			for _, existing := range settings.HiddenPresets {
+				if existing == name {
+					found = true
+					break
+				}
+			}
+			if !found {
+				settings.HiddenPresets = append(settings.HiddenPresets, name)
+				if err := settings.Save(); err != nil {
+					log.Println("Error saving hidden preset list:", err)
+				}
+			}
+		} else {
+			if err := os.Remove(info.Path); err != nil {
+				dialog.ShowError(err, w)
+				return
+			}
+		}
+		refreshPresetOptions("No Preset")
+	})
+	removePresetBtn.Disable()
+	refreshPresetOptions("No Preset")
+
 	buildingsTab := container.NewTabItem("Buildings", container.NewVBox(
 		numBuildingsSlider,
 		minBuildingSizeSlider,
@@ -1705,6 +1937,7 @@ func main() {
 	imageTab := container.NewTabItem("Image", container.NewVBox(
 		widget.NewLabel("Preset:"),
 		presetSelect,
+		container.NewGridWithColumns(2, addPresetBtn, removePresetBtn),
 		widget.NewSeparator(),
 		widget.NewLabel("Width:"),
 		widthEntry, widget.NewLabel("Height:"),