// Copyright 2023 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT package label import (	"errors"	"fmt"	"strings" 	"forgejo.org/modules/options" 	"gopkg.in/yaml.v3") type labelFile struct {	Labels []*Label `yaml:"labels"`} // ErrTemplateLoad represents a "ErrTemplateLoad" kind of error.type ErrTemplateLoad struct {	TemplateFile  string	OriginalError error} // IsErrTemplateLoad checks if an error is a ErrTemplateLoad.func IsErrTemplateLoad(err error) bool {	_, ok := err.(ErrTemplateLoad)	return ok} func (err ErrTemplateLoad) Error() string {	return fmt.Sprintf("failed to load label template file %q: %v", err.TemplateFile, err.OriginalError)} // LoadTemplateFile loads the label template file by given file name, returns a slice of Label structs.func LoadTemplateFile(fileName string) ([]*Label, error) {	data, err := options.Labels(fileName)	if err != nil {		return nil, ErrTemplateLoad{fileName, fmt.Errorf("LoadTemplateFile: %w", err)}	} 	if strings.HasSuffix(fileName, ".yaml") || strings.HasSuffix(fileName, ".yml") {		return parseYamlFormat(fileName, data)	}	return parseLegacyFormat(fileName, data)} func parseYamlFormat(fileName string, data []byte) ([]*Label, error) {	lf := &labelFile{} 	if err := yaml.Unmarshal(data, lf); err != nil {		return nil, err	} 	// Validate label data and fix colors	for _, l := range lf.Labels {		l.Color = strings.TrimSpace(l.Color)		if len(l.Name) == 0 || len(l.Color) == 0 {			return nil, ErrTemplateLoad{fileName, errors.New("label name and color are required fields")}		}		color, err := NormalizeColor(l.Color)		if err != nil {			return nil, ErrTemplateLoad{fileName, fmt.Errorf("bad HTML color code '%s' in label: %s", l.Color, l.Name)}		}		l.Color = color	} 	return lf.Labels, nil} func parseLegacyFormat(fileName string, data []byte) ([]*Label, error) {	lines := strings.Split(string(data), "\n")	list := make([]*Label, 0, len(lines))	for i := 0; i < len(lines); i++ {		line := strings.TrimSpace(lines[i])		if len(line) == 0 {			continue		} 		parts, description, _ := strings.Cut(line, ";") 		color, labelName, ok := strings.Cut(parts, " ")		if !ok {			return nil, ErrTemplateLoad{fileName, fmt.Errorf("line is malformed: %s", line)}		} 		color, err := NormalizeColor(color)		if err != nil {			return nil, ErrTemplateLoad{fileName, fmt.Errorf("bad HTML color code '%s' in line: %s", color, line)}		} 		list = append(list, &Label{			Name:        strings.TrimSpace(labelName),			Color:       color,			Description: strings.TrimSpace(description),		})	} 	return list, nil} // LoadTemplateDescription loads the labels from a template file, returns a description string by joining each Label.Name with commafunc LoadTemplateDescription(fileName string) (string, error) {	var buf strings.Builder	list, err := LoadTemplateFile(fileName)	if err != nil {		return "", err	} 	for i := 0; i < len(list); i++ {		if i > 0 {			buf.WriteString(", ")		}		buf.WriteString(list[i].Name)	}	return buf.String(), nil}