lewis.moe
Monorepo for Tangled
appview/validator: add model validation for label defs
Signed-off-by: oppiliappan <me@oppi.li>
+77
appview/validator/label.go
+77
appview/validator/label.go
···
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package validator
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import (
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"fmt"
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"regexp"
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"strings"
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"github.com/bluesky-social/indigo/atproto/syntax"
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"golang.org/x/exp/slices"
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"tangled.sh/tangled.sh/core/api/tangled"
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"tangled.sh/tangled.sh/core/appview/db"
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)
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var (
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// Label name should be alphanumeric with hyphens/underscores, but not start/end with them
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labelNameRegex = regexp.MustCompile(`^[a-zA-Z0-9]([a-zA-Z0-9_-]*[a-zA-Z0-9])?$`)
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// Color should be a valid hex color
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colorRegex = regexp.MustCompile(`^#[a-fA-F0-9]{6}$`)
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// You can only label issues and pulls presently
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validScopes = []syntax.NSID{tangled.RepoIssueNSID, tangled.RepoPullNSID}
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)
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func (v *Validator) ValidateLabelDefinition(label *db.LabelDefinition) error {
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if label.Name == "" {
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return fmt.Errorf("label name is empty")
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}
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if len(label.Name) > 40 {
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return fmt.Errorf("label name too long (max 40 graphemes)")
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}
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if len(label.Name) < 1 {
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return fmt.Errorf("label name too short (min 1 grapheme)")
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}
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if !labelNameRegex.MatchString(label.Name) {
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return fmt.Errorf("label name contains invalid characters (use only letters, numbers, hyphens, and underscores)")
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}
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if !label.ValueType.IsConcreteType() {
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return fmt.Errorf("invalid value type: %q (must be one of: null, boolean, integer, string)", label.ValueType)
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}
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if label.ValueType.IsNull() && label.ValueType.IsEnumType() {
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return fmt.Errorf("null type cannot be used in conjunction with enum type")
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}
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// validate scope (nsid format)
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if label.Scope == "" {
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return fmt.Errorf("scope is required")
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}
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if _, err := syntax.ParseNSID(string(label.Scope)); err != nil {
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return fmt.Errorf("failed to parse scope: %w", err)
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}
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if !slices.Contains(validScopes, label.Scope) {
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return fmt.Errorf("invalid scope: scope must be one of %q", validScopes)
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}
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// validate color if provided
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if label.Color != nil {
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color := strings.TrimSpace(*label.Color)
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if color == "" {
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// empty color is fine, set to nil
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label.Color = nil
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} else {
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if !colorRegex.MatchString(color) {
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return fmt.Errorf("color must be a valid hex color (e.g. #79FFE1 or #000)")
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}
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// expand 3-digit hex to 6-digit hex
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if len(color) == 4 { // #ABC
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color = fmt.Sprintf("#%c%c%c%c%c%c", color[1], color[1], color[2], color[2], color[3], color[3])
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}
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// convert to uppercase for consistency
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color = strings.ToUpper(color)
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label.Color = &color
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}
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}
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return nil
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}