Add pkg/util/dirtree

Update dir_tree tool to use it
Update filepicker bubble to use it

pkg/agents/toolbox/dir_tree.go

@@ -3,12 +3,11 @@ package toolbox
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"strconv"
-	"strings"
 
 	toolutil "git.mlow.ca/mlow/lmcli/pkg/agents/toolbox/util"
 	"git.mlow.ca/mlow/lmcli/pkg/api"
+	"git.mlow.ca/mlow/lmcli/pkg/util/dirtree"
 )
 
 const TREE_DESCRIPTION = `Retrieve a tree-like view of a directory's contents.
@@ -85,58 +84,25 @@ func tree(path string, depth int) api.CallResult {
 		return api.CallResult{Message: reason}
 	}
 
-	var treeOutput strings.Builder
-	treeOutput.WriteString(path + "\n")
-	err := buildTree(&treeOutput, path, "", depth)
+	tree := dirtree.NewTree(path)
+	err := tree.Root.LoadChildren(true, depth, nil)
 	if err != nil {
 		return api.CallResult{
 			Message: err.Error(),
 		}
 	}
 
-	return api.CallResult{Result: treeOutput.String()}
-}
-
-func buildTree(output *strings.Builder, path string, prefix string, depth int) error {
-	files, err := os.ReadDir(path)
+	nodes := dirtree.FlattenTree(tree.Root, true)
+	rendered := dirtree.RenderNodes(nodes, dirtree.Standard, -1, func(n *dirtree.Node) string {
+		if n.IsDir() {
+			return fmt.Sprintf("%s/", n.Name)
+		} else {
+			info, err := os.Stat(n.Path)
 			if err != nil {
-		return err
+				return fmt.Sprintf("%s (ERR: %s bytes)", n.Name, err.Error())
 			}
-
-	for i, file := range files {
-		if strings.HasPrefix(file.Name(), ".") {
-			// Skip hidden files and directories
-			continue
+			return fmt.Sprintf("%s (%d bytes)", n.Name, info.Size())
 		}
-
-		isLast := i == len(files)-1
-		var branch string
-		if isLast {
-			branch = "└── "
-		} else {
-			branch = "├── "
-		}
-
-		info, _ := file.Info()
-		size := info.Size()
-		sizeStr := fmt.Sprintf(" (%d bytes)", size)
-
-		output.WriteString(prefix + branch + file.Name())
-		if file.IsDir() {
-			output.WriteString("/\n")
-			if depth > 0 {
-				var nextPrefix string
-				if isLast {
-					nextPrefix = prefix + "    "
-				} else {
-					nextPrefix = prefix + "│   "
-				}
-				buildTree(output, filepath.Join(path, file.Name()), nextPrefix, depth-1)
-			}
-		} else {
-			output.WriteString(sizeStr + "\n")
-		}
-	}
-
-	return nil
+	})
+	return api.CallResult{Result: rendered}
 }

pkg/tui/bubbles/filepicker/filepicker.go

@@ -0,0 +1,113 @@
+package filepicker
+
+import (
+	"git.mlow.ca/mlow/lmcli/pkg/util/dirtree"
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
+)
+
+type Model struct {
+	tree         *dirtree.Tree
+	cursor       int
+	displayNodes []*dirtree.Node // Flattened view of visible nodes
+}
+
+func New(path string) Model {
+	m := Model{
+		tree: dirtree.NewTree(path),
+	}
+
+	m.tree.Root.LoadChildren(false, 0, nil)
+	m.updateRenderTree()
+	return m
+}
+
+func (m *Model) updateRenderTree() {
+	m.displayNodes = dirtree.FlattenTree(m.tree.Root, false)
+}
+
+func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
+	switch msg := msg.(type) {
+	case tea.KeyMsg:
+		switch msg.String() {
+		case "j":
+			if m.cursor < len(m.displayNodes)-1 {
+				m.cursor++
+			}
+		case "k":
+			if m.cursor > 0 {
+				m.cursor--
+			}
+		case "l", "right":
+			current := m.displayNodes[m.cursor]
+			if current.IsDir() {
+				current.Expanded = true
+				current.LoadChildren(false, 0, nil)
+				m.updateRenderTree()
+			}
+		case "h", "left":
+			current := m.displayNodes[m.cursor]
+			if current.IsDir() && current.Expanded {
+				current.Expanded = false
+				m.updateRenderTree()
+			} else {
+				// Find and collapse parent
+				if !current.IsRoot() {
+					current.Parent().Expanded = false
+					m.updateRenderTree()
+					// Move cursor to parent
+					for i, node := range m.displayNodes {
+						if node == current.Parent() {
+							m.cursor = i
+							break
+						}
+					}
+				}
+			}
+		case " ":
+			current := m.displayNodes[m.cursor]
+			if current.IsSelected() {
+				current.Deselect(true)
+			} else {
+				current.Select(true, 0)
+			}
+			m.updateRenderTree()
+		case "H":
+			m.tree.ShowHidden = !m.tree.ShowHidden
+			m.tree.Root.LoadChildren(false, 0, nil)
+		}
+	}
+	return m, nil
+}
+
+func (m Model) Init() tea.Cmd {
+	return nil
+}
+
+func (m Model) View() string {
+	// Define styles
+	dirStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("12")) // Blue for directories
+	fileStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("7")) // White for files
+	selectedStyle := lipgloss.NewStyle().Bold(true)
+
+	renderNode := func(node *dirtree.Node) string {
+		var nodeName string
+		if node.IsDir() {
+			caret := "▶ "
+			if node.Expanded {
+				caret = "▼ "
+			}
+			nodeName = caret + node.Name + "/"
+			nodeName = dirStyle.Render(nodeName)
+		} else {
+			nodeName = fileStyle.Render(node.Name)
+		}
+
+		if node.IsSelected() {
+			nodeName = selectedStyle.Render(nodeName)
+		}
+		return nodeName
+	}
+
+	return dirtree.RenderNodes(m.displayNodes, dirtree.Compact, m.cursor, renderNode)
+}

pkg/tui/bubbles/filepicker/model.go

@@ -1,299 +0,0 @@
-package filepicker
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"strings"
-
-	tea "github.com/charmbracelet/bubbletea"
-	"github.com/charmbracelet/lipgloss"
-)
-
-type Node struct {
-	path     string
-	name     string
-	isDir    bool
-	expanded bool
-	children []*Node
-}
-
-type Model struct {
-	root         *Node
-	cursor       int
-	showHidden   bool
-	displayLines []*Node // Flattened view of visible nodes
-	rootPath     string
-
-	SelectedPaths []string
-	expandedPaths map[string]bool // Track expanded paths
-}
-
-func New(path string) Model {
-	root := &Node{
-		path:     path,
-		name:     filepath.Base(path),
-		isDir:    true,
-		expanded: true,
-	}
-
-	m := Model{
-		root:          root,
-		rootPath:      path,
-		SelectedPaths: make([]string, 0),
-		showHidden:    false,
-		expandedPaths: make(map[string]bool),
-	}
-
-	m.loadDirectory(root)
-	m.updateDisplayLines()
-	return m
-}
-
-func (m *Model) loadDirectory(node *Node) error {
-	// Save current expanded state of children
-	for _, child := range node.children {
-		if child.expanded {
-			m.expandedPaths[child.path] = true
-		}
-	}
-
-	entries, err := os.ReadDir(node.path)
-	if err != nil {
-		return err
-	}
-
-	node.children = make([]*Node, 0)
-	for _, entry := range entries {
-		if !m.showHidden && strings.HasPrefix(entry.Name(), ".") {
-			continue
-		}
-
-		childPath := filepath.Join(node.path, entry.Name())
-		child := &Node{
-			path:     childPath,
-			name:     entry.Name(),
-			isDir:    entry.IsDir(),
-			expanded: m.expandedPaths[childPath], // Restore expanded state
-		}
-		node.children = append(node.children, child)
-	}
-	return nil
-}
-
-func (m *Model) updateDisplayLines() {
-	m.displayLines = make([]*Node, 0)
-	m.flattenTree(m.root, 0)
-}
-
-func (m *Model) flattenTree(node *Node, depth int) {
-	m.displayLines = append(m.displayLines, node)
-	if node.isDir && node.expanded {
-		for _, child := range node.children {
-			m.flattenTree(child, depth+1)
-		}
-	}
-}
-
-func (m Model) Update(msg tea.Msg) (Model, tea.Cmd) {
-	switch msg := msg.(type) {
-	case tea.KeyMsg:
-		switch msg.String() {
-		case "j":
-			if m.cursor < len(m.displayLines)-1 {
-				m.cursor++
-			}
-		case "k":
-			if m.cursor > 0 {
-				m.cursor--
-			}
-		case "l":
-			current := m.displayLines[m.cursor]
-			if current.isDir {
-				current.expanded = true
-				m.expandedPaths[current.path] = true
-				m.loadDirectory(current)
-				m.updateDisplayLines()
-			}
-		case "h":
-			current := m.displayLines[m.cursor]
-			if current.isDir && current.expanded {
-				current.expanded = false
-				delete(m.expandedPaths, current.path)
-				m.updateDisplayLines()
-			} else {
-				// Find and collapse parent
-				parent := m.findParent(current)
-				if parent != nil && parent.path != m.rootPath {
-					parent.expanded = false
-					delete(m.expandedPaths, parent.path)
-					m.updateDisplayLines()
-					// Move cursor to parent
-					for i, node := range m.displayLines {
-						if node == parent {
-							m.cursor = i
-							break
-						}
-					}
-				}
-			}
-		case " ":
-			current := m.displayLines[m.cursor]
-			if m.isSelected(current.path) {
-				m.SelectedPaths = removeString(m.SelectedPaths, current.path)
-			} else {
-				m.SelectedPaths = append(m.SelectedPaths, current.path)
-			}
-		case "H":
-			m.showHidden = !m.showHidden
-			m.reloadTree()
-		}
-	}
-	return m, nil
-}
-
-func (m Model) Init() tea.Cmd {
-	return nil
-}
-
-func (m Model) View() string {
-	var sb strings.Builder
-
-	// Define styles
-	dirStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("12"))    // Blue for directories
-	fileStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("7"))    // White for files
-	cursorStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("yellow"))
-	selectedStyle := lipgloss.NewStyle().Bold(true)
-
-	// Track the parent-child relationships for proper indentation
-	levelIsLast := make(map[int]bool)
-
-	for i, node := range m.displayLines {
-		// Calculate depth and prefix
-		depth := 0
-		if node != m.root {
-			depth = strings.Count(node.path[len(m.rootPath):], string(os.PathSeparator))
-		}
-
-		// Build the prefix (tree structure)
-		var prefix strings.Builder
-
-		if node != m.root {
-			// For each level up to current depth, add the appropriate prefix
-			for d := 0; d < depth; d++ {
-				if levelIsLast[d] {
-					prefix.WriteString("    ")
-				} else {
-					prefix.WriteString("│   ")
-				}
-			}
-
-			// Find if this node is the last among its siblings
-			parent := m.findParent(node)
-			if parent != nil {
-				isLast := parent.children[len(parent.children)-1] == node
-				levelIsLast[depth] = isLast
-
-				if isLast {
-					prefix.WriteString("└── ")
-				} else {
-					prefix.WriteString("├── ")
-				}
-			}
-		}
-
-		// Cursor indicator
-		cursor := " "
-		if i == m.cursor {
-			cursor = cursorStyle.Render(">")
-		}
-
-		// Node name with optional caret for directories
-		var nodeName string
-		if node.isDir {
-			caret := "▶ "
-			if node.expanded {
-				caret = "▼ "
-			}
-			nodeName = caret + node.name
-			if node != m.root {
-				nodeName += "/"
-			}
-			nodeName = dirStyle.Render(nodeName)
-		} else {
-			nodeName = fileStyle.Render(node.name)
-		}
-
-		// Apply bold style if selected
-		if m.isSelected(node.path) {
-			nodeName = selectedStyle.Render(nodeName)
-		}
-
-		// Build the line
-		line := fmt.Sprintf("%s %s%s\n",
-			cursor,
-			prefix.String(),
-			nodeName)
-
-		sb.WriteString(line)
-	}
-
-	return sb.String()
-}
-
-func (m *Model) reloadTree() {
-	// Save expanded state before reloading
-	m.saveExpandedState(m.root)
-
-	m.root.children = nil
-	m.loadDirectory(m.root)
-	m.updateDisplayLines()
-}
-
-func (m *Model) saveExpandedState(node *Node) {
-	if node.isDir && node.expanded {
-		m.expandedPaths[node.path] = true
-		for _, child := range node.children {
-			m.saveExpandedState(child)
-		}
-	}
-}
-
-func (m *Model) findParent(node *Node) *Node {
-	var findParentRec func(*Node) *Node
-
-	findParentRec = func(current *Node) *Node {
-		if current == nil {
-			return nil
-		}
-		for _, child := range current.children {
-			if child == node {
-				return current
-			}
-			if result := findParentRec(child); result != nil {
-				return result
-			}
-		}
-		return nil
-	}
-
-	return findParentRec(m.root)
-}
-
-func (m Model) isSelected(path string) bool {
-	for _, selected := range m.SelectedPaths {
-		if selected == path {
-			return true
-		}
-	}
-	return false
-}
-
-func removeString(slice []string, s string) []string {
-	for i, v := range slice {
-		if v == s {
-			return append(slice[:i], slice[i+1:]...)
-		}
-	}
-	return slice
-}

pkg/util/dirtree/render.go

@@ -0,0 +1,82 @@
+package dirtree
+
+import "strings"
+
+// FlattenTree returns []*Node consistent with each node's `Expanded` state
+func FlattenTree(node *Node, expandAll bool) []*Node {
+	lines := make([]*Node, 0)
+	var flatten func(n *Node)
+	flatten = func(node *Node) {
+		lines = append(lines, node)
+		if node.isDir && (node.Expanded || expandAll) {
+			for _, child := range node.children {
+				flatten(child)
+			}
+		}
+	}
+	flatten(node)
+	return lines
+}
+
+type TreeFormat struct {
+	Space    string
+	Span     string
+	Node     string
+	NodeLast string
+}
+
+var (
+	Standard = TreeFormat{
+		Space:    "    ",
+		Span:     "│   ",
+		Node:     "├── ",
+		NodeLast: "└── ",
+	}
+	Compact = TreeFormat{
+		Space:    "  ",
+		Span:     "│ ",
+		Node:     "├ ",
+		NodeLast: "└ ",
+	}
+)
+
+func RenderNodes(displayNodes []*Node, format TreeFormat, cursor int, renderNode func(*Node) string) string {
+	var sb strings.Builder
+	levelIsLast := make(map[int]bool)
+	for i, node := range displayNodes {
+		// Cursor indicator
+		if cursor >= 0 {
+			if i == cursor {
+				sb.WriteString("> ")
+			} else {
+				sb.WriteString("  ")
+			}
+		}
+
+		// Tree structure
+		if node.depth > 0 {
+			for d := 1; d < node.depth; d++ {
+				if levelIsLast[d] {
+					sb.WriteString(format.Space)
+				} else {
+					sb.WriteString(format.Span)
+				}
+			}
+
+			// Find if this node is the last among its siblings
+			isLast := node.parent.children[len(node.parent.children)-1] == node
+			levelIsLast[node.depth] = isLast
+
+			if isLast {
+				sb.WriteString(format.NodeLast)
+			} else {
+				sb.WriteString(format.Node)
+			}
+		}
+
+		// Render the node
+		sb.WriteString(renderNode(node))
+		sb.WriteString("\n")
+	}
+	return sb.String()
+}

pkg/util/dirtree/tree.go

@@ -0,0 +1,132 @@
+package dirtree
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Tree struct {
+	Root       *Node
+	ShowHidden bool
+}
+
+type Node struct {
+	tree     *Tree
+	parent   *Node
+	children []*Node
+	depth    int
+	Path     string
+	Name     string
+	Expanded bool
+	isDir    bool
+	selected bool
+}
+
+func NewTree(path string) *Tree {
+	tree := &Tree{
+		ShowHidden: false,
+	}
+	tree.Root = &Node{
+		tree:     tree,
+		parent:   nil,
+		Path:     path,
+		Name:     filepath.Base(path),
+		isDir:    true,
+		Expanded: true,
+	}
+	return tree
+}
+
+func (node *Node) IsRoot() bool {
+	return node.tree.Root == node
+}
+
+func (node *Node) Parent() *Node {
+	return node.parent
+}
+
+func (node *Node) IsSelected() bool {
+	return node.selected
+}
+
+func (node *Node) IsDir() bool {
+	return node.isDir
+}
+
+func (node *Node) Select(recurse bool, maxDepth int) {
+	node.selected = true
+	if node.isDir && recurse {
+		node.LoadChildren(recurse, maxDepth, func (n *Node) {
+			n.selected = true
+		})
+	}
+}
+
+func (node *Node) Deselect(recurse bool) {
+	node.selected = false
+	if node.isDir && recurse {
+		for _, child := range node.children {
+			child.Deselect(recurse)
+		}
+	}
+}
+
+func (node *Node) LoadChildren(recurse bool, maxDepth int, visitFunc func (node *Node)) error {
+	startDepth := node.depth
+	var loadChildren func(node *Node) error
+	loadChildren = func(node *Node) error {
+		// Load new entries
+		entries, err := os.ReadDir(node.Path)
+		if err != nil {
+			return err
+		}
+
+		// Save current children before loading
+		oldChildren := make(map[string]*Node)
+		for _, child := range node.children {
+			oldChildren[child.Path] = child
+		}
+
+		node.children = make([]*Node, 0)
+		for _, entry := range entries {
+			if !node.tree.ShowHidden && strings.HasPrefix(entry.Name(), ".") {
+				continue
+			}
+
+			child := &Node{
+				tree:   node.tree,
+				parent: node,
+				depth:  node.depth + 1,
+				Name:   entry.Name(),
+				isDir:  entry.IsDir(),
+				Path:   filepath.Join(node.Path, entry.Name()),
+			}
+
+			oldChild, exists := oldChildren[child.Path]
+			if child.isDir {
+				// Preserve child's grandchildren and expanded/selected state
+				if exists && (oldChild.Expanded || len(oldChild.children) > 0) {
+					child.Expanded = oldChild.Expanded
+					child.selected = oldChild.selected
+					child.children = oldChild.children
+					for i := range child.children {
+						child.children[i].parent = child
+					}
+					loadChildren(child)
+				} else if recurse && (maxDepth <= 0 || node.depth - startDepth < maxDepth) {
+					loadChildren(child)
+				}
+			} else if exists {
+				child.selected = oldChild.selected
+			}
+
+			node.children = append(node.children, child)
+			if visitFunc != nil {
+				visitFunc(child)
+			}
+		}
+		return nil
+	}
+	return loadChildren(node)
+}