add view layout and a basic content render

notes.go

@@ -1 +1,142 @@
+/*
+this pakckage basically handles notes which are the individual files for spaced
+repetition in mend
+- ruinivist, 3Jan26
+*/
+
 package main
+
+import (
+	"os"
+	"strings"
+
+	"github.com/charmbracelet/bubbles/viewport"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/glamour"
+)
+
+type NoteView struct {
+	// the actual content
+	path    string
+	title   string   // the first line is always # title
+	content string   // strip the first line from file rest is content
+	hints   []string //a hint is anything that matches (hint: <text>) in content
+	// display layer
+	err        error
+	loading    bool
+	vp         viewport.Model
+	mdRenderer *glamour.TermRenderer
+}
+
+// ================== messages ===================
+type loadNote struct {
+	path string
+}
+
+type loadedNote struct {
+	title   string
+	content string
+	hints   []string
+	err     error
+}
+
+func NewNoteView() *NoteView {
+	mdRenderer, _ := glamour.NewTermRenderer(
+		glamour.WithAutoStyle(),
+	)
+	return &NoteView{
+		loading:    true,
+		mdRenderer: mdRenderer,
+		vp:         viewport.New(0, 0),
+	}
+}
+
+func (m *NoteView) Init() tea.Cmd {
+	return nil
+}
+
+func (m *NoteView) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		m.vp.Width = msg.Width
+		m.vp.Height = msg.Height
+		return m, nil
+
+	case loadNote:
+		if m.path == msg.path {
+			return m, nil //noop
+		}
+		m.path = msg.path
+		m.loading = true
+		return m, fetchContent(msg.path)
+
+	case loadedNote:
+		m.loading = false
+		m.title = msg.title
+		m.content = msg.content
+		m.hints = msg.hints
+		m.err = msg.err
+		m.vp.SetContent(m.renderNote())
+		return m, nil
+	}
+	return m, nil
+}
+
+func (m NoteView) View() string {
+	if m.loading {
+		return "Loading note..."
+	}
+
+	if m.err != nil {
+		return "Error: " + m.err.Error()
+	}
+
+	return m.vp.View()
+}
+
+func fetchContent(path string) tea.Cmd {
+	return func() tea.Msg {
+		data, err := os.ReadFile(path)
+		if err != nil {
+			return loadedNote{err: err}
+		}
+
+		content := string(data)
+		lines := strings.Split(content, "\n")
+
+		var title string
+
+		// title
+		if len(lines) > 0 && strings.HasPrefix(lines[0], "# ") {
+			title = strings.TrimPrefix(lines[0], "# ")
+			content = strings.Join(lines[1:], "\n")
+		}
+
+		// hints
+		hints := extractHints(content)
+		content = strings.TrimSpace(content)
+
+		return loadedNote{
+			title:   title,
+			content: content,
+			hints:   hints,
+		}
+	}
+}
+
+func extractHints(content string) []string {
+	hints := make([]string, 0)
+	return hints // to add later
+}
+
+func (m NoteView) renderNote() string {
+	title, err1 := m.mdRenderer.Render(m.title)
+	content, err2 := m.mdRenderer.Render(m.content)
+
+	if err1 != nil || err2 != nil {
+		// some error return raw
+		return m.title + "\n\n" + m.content
+	}
+
+	return title + "\n\n" + content
+}