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-rw-r--r--modules/label/parser.go118
1 files changed, 118 insertions, 0 deletions
diff --git a/modules/label/parser.go b/modules/label/parser.go
new file mode 100644
index 0000000..511bac8
--- /dev/null
+++ b/modules/label/parser.go
@@ -0,0 +1,118 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package label
+
+import (
+ "errors"
+ "fmt"
+ "strings"
+
+ "code.gitea.io/gitea/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 comma
+func 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
+}