commit 34db0a709cadb849b27980faa7a454a790a54262 · julien.rbrt.fr/tangled-core

+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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       }