[Error]
enum NativeError {
  "Initialization",
  "Database",
  "Network",
};

enum MessageAck {
    "Received",
    "Seen",
    "Sent",
};

enum Formatting {
    "Unknown",
    "Mention",
    "HashTag",
    "BotCommand",
    "Url",
    "Email",
    "Bold",
    "Italic",
    "Code",
    "Pre",  // language:string
    "TextUrl",  // url:string
    "MentionName",  // user_id:long
    "Phone",
    "CashTag",
    "Underline",
    "Strike",
    "Blockquote",
    "BankCard",
    "Spoiler",
    "CustomEmoji",  // document_id:long
};

dictionary TextFormat {
    Formatting format;
    i32 offset;
    i32 length;
    string? extra;
};

dictionary Message {
    i32 id;
    string sender;
    string text;
    timestamp date;
    timestamp? edit_date;
    sequence<TextFormat> formatting;
};

dictionary MessagePreview {
    string sender;
    string text;
    timestamp date;
    MessageAck ack;
};

dictionary Dialog {
    string id;
    string title;
    MessagePreview? last_message;
    boolean pinned;
};

interface LoginProcedure {
    constructor();
    [Throws=NativeError]
    void request_login_code(string phone);
    [Throws=NativeError]
    void sign_in(string code);
};

namespace talaria {
    [Throws=NativeError]
    void init_database(string path);
    [Throws=NativeError]
    void init_client();
    [Throws=NativeError]
    boolean need_login();
    [Throws=NativeError]
    sequence<Dialog> get_dialogs();
    [Throws=NativeError]
    sequence<Message> get_messages(string packed);
    [Throws=NativeError]
    Message send_message(string packed, string text);
};