refactor to support commit file tree

pkg/gui/filetree/commit_file_change_node.go

@@ -0,0 +1,147 @@
+package filetree
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/jesseduffield/lazygit/pkg/commands/models"
+)
+
+type CommitFileChangeNode struct {
+	Children         []*CommitFileChangeNode
+	File             *models.CommitFile
+	Path             string // e.g. '/path/to/mydir'
+	CompressionLevel int    // equal to the number of forward slashes you'll see in the path when it's rendered in tree mode
+}
+
+// methods satisfying ListItem interface
+
+func (s *CommitFileChangeNode) ID() string {
+	return s.GetPath()
+}
+
+func (s *CommitFileChangeNode) Description() string {
+	return s.GetPath()
+}
+
+// methods satisfying INode interface
+
+func (s *CommitFileChangeNode) IsLeaf() bool {
+	return s.File != nil
+}
+
+func (s *CommitFileChangeNode) GetPath() string {
+	return s.Path
+}
+
+func (s *CommitFileChangeNode) GetChildren() []INode {
+	result := make([]INode, len(s.Children))
+	for i, child := range s.Children {
+		result[i] = child
+	}
+
+	return result
+}
+
+func (s *CommitFileChangeNode) SetChildren(children []INode) {
+	castChildren := make([]*CommitFileChangeNode, len(children))
+	for i, child := range children {
+		castChildren[i] = child.(*CommitFileChangeNode)
+	}
+
+	s.Children = castChildren
+}
+
+func (s *CommitFileChangeNode) GetCompressionLevel() int {
+	return s.CompressionLevel
+}
+
+func (s *CommitFileChangeNode) SetCompressionLevel(level int) {
+	s.CompressionLevel = level
+}
+
+// methods utilising generic functions for INodes
+
+func (s *CommitFileChangeNode) Sort() {
+	sortNode(s)
+}
+
+func (s *CommitFileChangeNode) ForEachFile(cb func(*models.CommitFile) error) error {
+	return forEachLeaf(s, func(n INode) error {
+		castNode := n.(*CommitFileChangeNode)
+		return cb(castNode.File)
+	})
+}
+
+func (s *CommitFileChangeNode) Any(test func(node *CommitFileChangeNode) bool) bool {
+	return any(s, func(n INode) bool {
+		castNode := n.(*CommitFileChangeNode)
+		return test(castNode)
+	})
+}
+
+func (n *CommitFileChangeNode) Flatten(collapsedPaths map[string]bool) []*CommitFileChangeNode {
+	results := flatten(n, collapsedPaths)
+	nodes := make([]*CommitFileChangeNode, len(results))
+	for i, result := range results {
+		nodes[i] = result.(*CommitFileChangeNode)
+	}
+
+	return nodes
+}
+
+func (node *CommitFileChangeNode) GetNodeAtIndex(index int, collapsedPaths map[string]bool) *CommitFileChangeNode {
+	return getNodeAtIndex(node, index, collapsedPaths).(*CommitFileChangeNode)
+}
+
+func (node *CommitFileChangeNode) GetIndexForPath(path string, collapsedPaths map[string]bool) (int, bool) {
+	return getIndexForPath(node, path, collapsedPaths)
+}
+
+func (node *CommitFileChangeNode) Size(collapsedPaths map[string]bool) int {
+	return size(node, collapsedPaths)
+}
+
+func (s *CommitFileChangeNode) Compress() {
+	// with these functions I try to only have type conversion code on the actual struct,
+	// but comparing interface values to nil is fraught with danger so I'm duplicating
+	// that code here.
+	if s == nil {
+		return
+	}
+
+	compressAux(s)
+}
+
+// This ignores the root
+func (node *CommitFileChangeNode) GetPathsMatching(test func(*CommitFileChangeNode) bool) []string {
+	return getPathsMatching(node, func(n INode) bool {
+		return test(n.(*CommitFileChangeNode))
+	})
+}
+
+func (s *CommitFileChangeNode) GetLeaves() []*CommitFileChangeNode {
+	leaves := getLeaves(s)
+	castLeaves := make([]*CommitFileChangeNode, len(leaves))
+	for i := range leaves {
+		castLeaves[i] = leaves[i].(*CommitFileChangeNode)
+	}
+
+	return castLeaves
+}
+
+// extra methods
+
+func (s *CommitFileChangeNode) AnyFile(test func(file *models.CommitFile) bool) bool {
+	return s.Any(func(node *CommitFileChangeNode) bool {
+		return node.IsLeaf() && test(node.File)
+	})
+}
+
+func (s *CommitFileChangeNode) NameAtDepth(depth int) string {
+	splitName := strings.Split(s.Path, string(os.PathSeparator))
+	name := filepath.Join(splitName[depth:]...)
+
+	return name
+}