Add validator lib

Signed-off-by: Bryan Frimin <bryan@getprobo.com>
2025-11-03 08:19:09 +01:00
parent 288c59a5f2
commit f9216d30b2
102 changed files with 7409 additions and 1068 deletions
--- a/pkg/validator/validator_format.go
+++ b/pkg/validator/validator_format.go
@@ -0,0 +1,255 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package validator
+
+import (
+	"net/url"
+	"regexp"
+
+	"go.probo.inc/probo/pkg/gid"
+)
+
+var (
+	emailRegex  = regexp.MustCompile(`^[a-zA-Z0-9._%+\-]+@[a-zA-Z0-9.\-]+\.[a-zA-Z]{2,}$`)
+	gidRegex    = regexp.MustCompile(`^gid://[a-zA-Z0-9\-_]+/[a-zA-Z0-9\-_]+/[a-zA-Z0-9\-_]+$`)
+	uuidRegex   = regexp.MustCompile(`^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$`)
+	domainRegex = regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)*[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$`)
+)
+
+// Email validates that a string is a valid email address.
+func Email() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidEmail, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		if !emailRegex.MatchString(str) {
+			return newValidationError(ErrorCodeInvalidEmail, "invalid email address")
+		}
+
+		return nil
+	}
+}
+
+// URL validates that a string is a valid URL with http or https scheme.
+func URL() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidURL, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		parsedURL, err := url.Parse(str)
+		if err != nil {
+			return newValidationError(ErrorCodeInvalidURL, "invalid URL format")
+		}
+
+		if parsedURL.Scheme != "http" && parsedURL.Scheme != "https" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must use http or https scheme")
+		}
+
+		if parsedURL.Host == "" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must have a host")
+		}
+
+		return nil
+	}
+}
+
+// HTTPUrl validates that a string is a valid HTTP URL (not HTTPS).
+func HTTPUrl() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidURL, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		parsedURL, err := url.Parse(str)
+		if err != nil {
+			return newValidationError(ErrorCodeInvalidURL, "invalid URL format")
+		}
+
+		if parsedURL.Scheme != "http" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must use http scheme")
+		}
+
+		if parsedURL.Host == "" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must have a host")
+		}
+
+		return nil
+	}
+}
+
+// HTTPSUrl validates that a string is a valid HTTPS URL (not HTTP).
+func HTTPSUrl() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidURL, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		parsedURL, err := url.Parse(str)
+		if err != nil {
+			return newValidationError(ErrorCodeInvalidURL, "invalid URL format")
+		}
+
+		if parsedURL.Scheme != "https" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must use https scheme")
+		}
+
+		if parsedURL.Host == "" {
+			return newValidationError(ErrorCodeInvalidURL, "URL must have a host")
+		}
+
+		return nil
+	}
+}
+
+// UUID validates that a string is a valid UUID.
+func UUID() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidFormat, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		if !uuidRegex.MatchString(str) {
+			return newValidationError(ErrorCodeInvalidFormat, "invalid UUID format")
+		}
+
+		return nil
+	}
+}
+
+// GID validates that a string is a valid GID using gid.ParseGID.
+// Optionally validates the entity type if provided.
+//
+// Example usage:
+//   - GID() validates any GID format
+//   - GID(100) validates GID with entity type 100
+//   - GID(100, 200) validates GID with entity type 100 or 200
+func GID(entityTypes ...uint16) ValidatorFunc {
+	return func(value any) *ValidationError {
+		if value == nil {
+			return nil
+		}
+
+		var gidValue gid.GID
+
+		switch v := value.(type) {
+		case gid.GID:
+			gidValue = v
+		case *gid.GID:
+			if v == nil {
+				return nil
+			}
+			gidValue = *v
+		default:
+			return newValidationError(ErrorCodeInvalidGID, "value must be a GID")
+		}
+
+		if len(entityTypes) > 0 {
+			parsedEntityType := gidValue.EntityType()
+			valid := false
+			for _, expected := range entityTypes {
+				if parsedEntityType == expected {
+					valid = true
+					break
+				}
+			}
+			if !valid {
+				return newValidationError(ErrorCodeInvalidGID, "GID has invalid entity type")
+			}
+		}
+
+		return nil
+	}
+}
+
+// Domain validates that a string is a valid domain name.
+func Domain() ValidatorFunc {
+	return func(value any) *ValidationError {
+		actualValue, isNil := dereferenceValue(value)
+		if isNil {
+			return nil
+		}
+
+		str, ok := actualValue.(string)
+		if !ok {
+			return newValidationError(ErrorCodeInvalidFormat, "value must be a string")
+		}
+
+		if str == "" {
+			return nil
+		}
+
+		if len(str) > 253 {
+			return newValidationError(ErrorCodeInvalidFormat, "domain name too long (max 253 characters)")
+		}
+
+		if !domainRegex.MatchString(str) {
+			return newValidationError(ErrorCodeInvalidFormat, "invalid domain name format")
+		}
+
+		return nil
+	}
+}