import { type LocalizedFieldValue } from '../utilities/normalizedFieldValues';
import type { SeoEditorConfiguration } from './appearance/seo';
import type { DescriptionLengthValidator } from './validators/description_length';
import type { FileSizeValidator } from './validators/file_size';
import type { ImageAspectRatioValidator } from './validators/image_aspect_ratio';
import type { ImageDimensionsValidator } from './validators/image_dimensions';
import type { RequiredSeoFieldsValidator } from './validators/required_seo_fields';
import type { TitleLengthValidator } from './validators/title_length';
export type SeoFieldValue = {
    title?: string | null;
    description?: string | null;
    image?: string | null;
    twitter_card?: 'summary' | 'summary_large_image' | null;
    no_index?: boolean;
} | null;
export declare function isSeoFieldValue(value: unknown): value is SeoFieldValue;
export declare function isLocalizedSeoFieldValue(value: unknown): value is LocalizedFieldValue<SeoFieldValue>;
export type SeoFieldValidators = {
    /** SEO field has to specify one or more properties, or it won't be valid */
    required_seo_fields?: RequiredSeoFieldsValidator;
    /** Accept assets only within a specified file size range */
    file_size?: FileSizeValidator;
    /** Accept assets only within a specified height and width range */
    image_dimensions?: ImageDimensionsValidator;
    /** Accept assets only within a specified aspect ratio range */
    image_aspect_ratio?: ImageAspectRatioValidator;
    /** Limits the length of the title for a SEO field */
    title_length?: TitleLengthValidator;
    /** Limits the length of the description for a SEO field */
    description_length?: DescriptionLengthValidator;
};
export type SeoFieldAppearance = {
    editor: 'seo';
    parameters: SeoEditorConfiguration;
} | {
    /** Plugin ID */
    editor: string;
    /** Plugin configuration */
    parameters: Record<string, unknown>;
};