declare type DateTime = Date;
declare type Url = string;
export declare namespace OpenGraph {
    type WebsiteType = "website";
    type ArticleType = "article";
    type ProductType = "product";
    type BookType = "book";
    type ProfileType = "profile";
    type MusicType = "music.song" | "music.album" | "music.playlist" | "music.radio_station";
    type VideoType = "video" | "video.movie" | "video.episode";
    type ObjectType = WebsiteType | ArticleType | ProductType | BookType | ProfileType | VideoType;
    interface Alternate {
        alternate: string;
    }
    interface Basic {
        title: string;
        image: Url | Image;
        url: Url;
        audio?: Url | Audio;
        description?: string;
        determiner?: string;
        locale?: string | Array<string | Alternate>;
        site_name?: string;
    }
    interface Image {
        url: string;
        secure_url?: Url;
        type?: string;
        width?: string;
        height?: string;
        alt?: string;
    }
    interface Audio {
        url: string;
        secure_url?: string;
        type?: string;
    }
    interface Website<T extends WebsiteType> extends Basic {
        type: T;
    }
    interface Article<T extends ArticleType> extends Basic {
        type: T;
        article: {
            published_time: DateTime;
            modified_time: DateTime;
            expiration_time: DateTime;
            author: Url | Url[];
            section: string;
            tag: string | string[];
        };
    }
    interface Amount {
        amount: number;
    }
    interface Currency {
        currency: string;
    }
    interface Product<T extends ProductType> extends Basic {
        type: T;
        product: {
            plural_title?: string;
            price: Array<Amount | Currency>;
        };
    }
    interface Book<T extends BookType> extends Basic {
        type: T;
        book: {
            author: Url | Url[];
            isbn: string;
            release_date: DateTime;
            tag: string | string[];
        };
    }
    interface Profile<T extends ProfileType> extends Basic {
        type: T;
        book: {
            first_name: string;
            last_name: string;
            username: string;
            gender: "male" | "female";
        };
    }
    interface Music<T extends MusicType> extends Basic {
        type: T;
        music: Url | Music.Props<T>;
    }
    interface Video<T extends VideoType> extends Basic {
        type: T;
        video: Url | Video.Props<T>;
    }
    namespace Music {
        interface Disc {
            disc: number;
        }
        interface Track {
            track: number;
        }
        export interface Song {
            duration: number;
            album: Url | Array<Url | Disc | Track>;
            musician: Url;
        }
        export interface Album {
            song: Url | Url[] | Array<Url | Disc | Track>;
            musician: Url;
            release_date: DateTime;
        }
        export interface Playlist {
            song: Url | Url[] | Array<Url | Disc | Track>;
            creator: Url;
        }
        export interface RadioStation {
            creator: Url;
        }
        export type Props<T extends MusicType> = T extends "music.song" ? Music.Song : T extends "music.album" ? Music.Album : T extends "music.playlist" ? Music.Playlist : T extends "music.radio_station" ? Music.RadioStation : never;
        export {};
    }
    namespace Video {
        interface Role {
            role: string;
        }
        export interface Base {
            url: string;
            secure_url?: string;
            type?: string;
            width?: string;
            height?: string;
        }
        export interface Movie extends Base {
            actor: string | string[] | Array<string | Role>;
            director: Url | Url[];
            writer: Url | Url[];
            duration: number;
            release_date: DateTime;
            tag: string | string[];
        }
        export interface Episode extends Base {
            actor: string | string[] | Array<string | Role>;
            director: string | string[];
            writer: string | string[];
            duration: number;
            release_date: DateTime;
            tag: string | string[];
            series: string;
        }
        export type Props<T extends VideoType> = T extends "video" ? Video.Base : T extends "video.movie" ? Video.Movie : T extends "video.episode" ? Video.Episode : never;
        export {};
    }
    export type Metadata<T extends ObjectType> = T extends WebsiteType ? Website<T> : T extends ArticleType ? Article<T> : T extends ProductType ? Product<T> : T extends BookType ? Book<T> : T extends ProfileType ? Profile<T> : T extends MusicType ? Music<T> : T extends VideoType ? Video<T> : never;
    interface Meta {
        property: string;
        content: string;
    }
    export const build: (object: any, iterator: (key: string, value: string) => any, parent?: string | undefined) => Meta[];
    export {};
}
export {};