feat(tui): add shared WizardState seeded from config and registry

internal/tui/state.go

@@ -0,0 +1,86 @@
+package tui
+
+import (
+	"sort"
+
+	"github.com/MDietermann/ArduinoArchSetup/internal/config"
+	"github.com/MDietermann/ArduinoArchSetup/internal/module"
+)
+
+// Theme is a named colorscheme presented in the wizard. Plan 3 wires these
+// names to actual theme modules; for now they are display-only strings.
+type Theme struct {
+	ID   string
+	Name string
+}
+
+// BuiltinThemes is the fixed list the wizard shows. Keep in sync with the
+// themes shipped by Plan 3's theme module.
+var BuiltinThemes = []Theme{
+	{ID: "gruvbox", Name: "Gruvbox Dark"},
+	{ID: "catppuccin", Name: "Catppuccin Mocha"},
+	{ID: "tokyonight", Name: "Tokyo Night"},
+	{ID: "nord", Name: "Nord"},
+	{ID: "dracula", Name: "Dracula"},
+}
+
+// ModuleChoice is one row in the module selector.
+type ModuleChoice struct {
+	ID          string
+	Name        string
+	Description string
+	Selected    bool
+}
+
+// WizardState is the payload the wizard fills in and the dashboard reads.
+type WizardState struct {
+	ThemeID     string
+	Modules     []ModuleChoice
+	Parallelism int  // advanced; reserved for a future concurrent engine
+	HaltOnError bool // advanced
+	Confirmed   bool // true once the user hits Confirm on the last screen
+}
+
+// NewWizardState builds an initial state from the running config and the
+// registered modules. Pre-ticks all modules except those disabled in the
+// overlay, defaults the theme to the first built-in theme.
+func NewWizardState(cfg config.Config, reg *module.Registry) WizardState {
+	disabled := map[string]bool{}
+	for _, id := range cfg.DisabledModules {
+		disabled[id] = true
+	}
+	mods := reg.All()
+	choices := make([]ModuleChoice, 0, len(mods))
+	for _, m := range mods {
+		meta := m.Meta()
+		choices = append(choices, ModuleChoice{
+			ID:          meta.ID,
+			Name:        meta.Name,
+			Description: meta.Description,
+			Selected:    !disabled[meta.ID],
+		})
+	}
+	sort.Slice(choices, func(i, j int) bool { return choices[i].ID < choices[j].ID })
+
+	theme := BuiltinThemes[0].ID
+	if override, ok := cfg.ThemeOverrides["__active"]; ok && override != "" {
+		theme = override
+	}
+
+	return WizardState{
+		ThemeID:     theme,
+		Modules:     choices,
+		Parallelism: 1,
+	}
+}
+
+// SelectedIDs returns only the checked module IDs.
+func (s WizardState) SelectedIDs() []string {
+	out := make([]string, 0, len(s.Modules))
+	for _, m := range s.Modules {
+		if m.Selected {
+			out = append(out, m.ID)
+		}
+	}
+	return out
+}