content

var (
	// MaxTitleRunes is the maximum allowed length of a content title in runes
	MaxTitleRunes = 200
	// MaxTagRunes is the maximum allowed length of a single tag in runes
	MaxTagRunes = 50
	// MaxMetaDescriptionRunes is the maximum allowed length of a content meta
	// description in runes (mirrors the SEO domain's 160-character limit).
	MaxMetaDescriptionRunes = 160
	// ErrContentNotFound is returned when content cannot be found
	ErrContentNotFound = errors.New("content not found")
	// ErrInvalidTitle is returned when title validation fails
	ErrInvalidTitle = errors.New("title is required and must be between 1 and 200 characters")
	// ErrEmptyContent is returned when content is empty
	ErrEmptyContent = errors.New("content is required")
	// ErrContentTooLong is returned when content exceeds maximum length
	ErrContentTooLong = errors.New("content must be less than 100000 characters")
	// ErrInvalidStatus is returned when status is not valid
	ErrInvalidStatus = errors.New("status must be either 'draft' or 'published'")
	// ErrInvalidSlug is returned when slug validation fails
	ErrInvalidSlug = errors.New("slug must be between 1 and 200 characters and contain only lowercase letters, numbers, hyphens, and dots")
	// ErrSlugAlreadyExists is returned when slug already exists
	ErrSlugAlreadyExists = errors.New("slug already exists")
	// ErrSlugImmutable is returned when a slug change is rejected because the
	// content is published (slugs stay editable only while the content is a draft)
	ErrSlugImmutable = errors.New("slug cannot be changed after publication")
	// ErrUnauthorized is returned when user doesn't have permission to access content
	ErrUnauthorized = errors.New("unauthorized access to content")
	// ErrHTMLInTitle is returned when title contains HTML
	ErrHTMLInTitle = errors.New("title must not contain HTML tags")
	// ErrInvalidTipTapContent is returned when content is not valid TipTap JSON
	ErrInvalidTipTapContent = errors.New("content must be valid TipTap JSON structure")
	// ErrHTMLInPlainText is returned when a plain text field contains HTML
	ErrHTMLInPlainText = errors.New("field must not contain HTML tags")
	// ErrInvalidFilterField is returned when a custom field filter has an empty field name
	ErrInvalidFilterField = errors.New("filter field must not be empty")
	// ErrInvalidFilterOperator is returned when a custom field filter has an unrecognized operator
	ErrInvalidFilterOperator = errors.New("invalid filter operator")
	// ErrInvalidFilterValue is returned when a custom field filter has an empty value
	ErrInvalidFilterValue = errors.New("filter value must not be empty")
	// ErrInvalidSortOrder is returned when a sort order is not one of the
	// recognised values (asc, desc). The empty string means "use the default"
	// and is always valid.
	ErrInvalidSortOrder = errors.New("sort order must be 'asc' or 'desc'")
	// ErrUnknownSystemFieldKey is returned when a system field key is not in the schema
	ErrUnknownSystemFieldKey = errors.New("unknown system field key")
	// ErrSystemFieldValidation is returned when a system field value fails schema validation
	ErrSystemFieldValidation = errors.New("system field validation failed")
	// ErrCustomFieldValidation is returned when a custom field value fails schema validation
	// (missing required field, wrong type, out-of-range, etc.). It wraps the per-field
	// detail so HTTP layers can map it to a 400 VALIDATION_ERROR via errors.Is.
	ErrCustomFieldValidation = errors.New("custom field validation failed")
	// ErrTranslationGroupNotFound is returned when a translation group ID does not exist
	ErrTranslationGroupNotFound = errors.New("translation group not found")
	// ErrTranslationAlreadyExists is returned when a translation for a language already exists in a group
	ErrTranslationAlreadyExists = errors.New("translation for this language already exists in this group")
	// ErrInvalidLanguage is returned when the language code is not in the configured languages
	ErrInvalidLanguage = errors.New("language is not in the configured languages list")
	// ErrInvalidFormat is returned when the content format is not one of the supported values
	ErrInvalidFormat = errors.New("format must be one of: tiptap, markdown, html")
	// ErrForbiddenPostType is returned when the caller's role cannot manage the
	// requested post type (config-defined role with a restricted manage list).
	ErrForbiddenPostType = errors.New("role cannot manage this post type")
	// ErrForbiddenPublish is returned when the caller's role has no publish
	// capability but attempts the publish operation.
	ErrForbiddenPublish = errors.New("role cannot publish content")
)