foxwitch.net
1package validator
2
3import (
4 "fmt"
5 "regexp"
6 "strings"
7
8 "github.com/bluesky-social/indigo/atproto/syntax"
9 "golang.org/x/exp/slices"
10 "tangled.sh/tangled.sh/core/api/tangled"
11 "tangled.sh/tangled.sh/core/appview/db"
12)
13
14var (
15 // Label name should be alphanumeric with hyphens/underscores, but not start/end with them
16 labelNameRegex = regexp.MustCompile(`^[a-zA-Z0-9]([a-zA-Z0-9_-]*[a-zA-Z0-9])?$`)
17 // Color should be a valid hex color
18 colorRegex = regexp.MustCompile(`^#[a-fA-F0-9]{6}$`)
19 // You can only label issues and pulls presently
20 validScopes = []syntax.NSID{tangled.RepoIssueNSID, tangled.RepoPullNSID}
21)
22
23func (v *Validator) ValidateLabelDefinition(label *db.LabelDefinition) error {
24 if label.Name == "" {
25 return fmt.Errorf("label name is empty")
26 }
27 if len(label.Name) > 40 {
28 return fmt.Errorf("label name too long (max 40 graphemes)")
29 }
30 if len(label.Name) < 1 {
31 return fmt.Errorf("label name too short (min 1 grapheme)")
32 }
33 if !labelNameRegex.MatchString(label.Name) {
34 return fmt.Errorf("label name contains invalid characters (use only letters, numbers, hyphens, and underscores)")
35 }
36
37 if !label.ValueType.IsConcreteType() {
38 return fmt.Errorf("invalid value type: %q (must be one of: null, boolean, integer, string)", label.ValueType)
39 }
40
41 if label.ValueType.IsNull() && label.ValueType.IsEnumType() {
42 return fmt.Errorf("null type cannot be used in conjunction with enum type")
43 }
44
45 // validate scope (nsid format)
46 if label.Scope == "" {
47 return fmt.Errorf("scope is required")
48 }
49 if _, err := syntax.ParseNSID(string(label.Scope)); err != nil {
50 return fmt.Errorf("failed to parse scope: %w", err)
51 }
52 if !slices.Contains(validScopes, label.Scope) {
53 return fmt.Errorf("invalid scope: scope must be one of %q", validScopes)
54 }
55
56 // validate color if provided
57 if label.Color != nil {
58 color := strings.TrimSpace(*label.Color)
59 if color == "" {
60 // empty color is fine, set to nil
61 label.Color = nil
62 } else {
63 if !colorRegex.MatchString(color) {
64 return fmt.Errorf("color must be a valid hex color (e.g. #79FFE1 or #000)")
65 }
66 // expand 3-digit hex to 6-digit hex
67 if len(color) == 4 { // #ABC
68 color = fmt.Sprintf("#%c%c%c%c%c%c", color[1], color[1], color[2], color[2], color[3], color[3])
69 }
70 // convert to uppercase for consistency
71 color = strings.ToUpper(color)
72 label.Color = &color
73 }
74 }
75
76 return nil
77}