app frame + storage

app.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type model struct {
+	project  string
+	todosDir string
+	count    int
+}
+
+func newModel(project string) (model, error) {
+	absolute, err := filepath.Abs(project)
+	if err != nil {
+		return model{}, fmt.Errorf("resolve project directory %q: %w", project, err)
+	}
+	info, err := os.Stat(absolute)
+	if err != nil {
+		return model{}, fmt.Errorf("project directory %q: %w", absolute, err)
+	}
+	if !info.IsDir() {
+		return model{}, fmt.Errorf("project path %q is not a directory", absolute)
+	}
+
+	dir := filepath.Join(absolute, ".pi", "todos")
+	entries, err := os.ReadDir(dir)
+	if errors.Is(err, os.ErrNotExist) {
+		return model{project: absolute, todosDir: dir}, nil
+	}
+	if err != nil {
+		return model{}, fmt.Errorf("read todo directory %q: %w", dir, err)
+	}
+	count := 0
+	for _, entry := range entries {
+		if !entry.IsDir() && strings.HasSuffix(entry.Name(), ".md") {
+			count++
+		}
+	}
+	return model{project: absolute, todosDir: dir, count: count}, nil
+}
+
+func (m model) Init() tea.Cmd { return nil }
+
+func (m model) Update(message tea.Msg) (tea.Model, tea.Cmd) {
+	if key, ok := message.(tea.KeyMsg); ok {
+		switch key.String() {
+		case "q", "ctrl+c":
+			return m, tea.Quit
+		}
+	}
+	return m, nil
+}
+
+func (m model) View() string {
+	var state string
+	if m.count == 0 {
+		state = "No todos yet. Pi stores todo items in this directory."
+	} else {
+		state = fmt.Sprintf("Found %d todo file(s). Browsing is coming in the next ticket.", m.count)
+	}
+	return fmt.Sprintf("TodoApp\n\nProject: %s\nTodos:   %s\n\n%s\n\nPress q or Ctrl+C to quit.\n", m.project, m.todosDir, state)
+}