/**
 * Describes information needed to start a chat
 * @module
 */
interface OpenChatRequest {
    /**
     * An optional message used when initiating chat
     */
    message?: string;
}
/**
 * Used when starting a chat with one person
 *
 * @see OpenGroupChatRequest for use when a chat with more than one person
 */
export interface OpenSingleChatRequest extends OpenChatRequest {
    /**
     * The [Microsoft Entra UPN](https://learn.microsoft.com/entra/identity/hybrid/connect/plan-connect-userprincipalname) (usually but not always an e-mail address)
     * of the user with whom to begin a chat
     */
    user: string;
}
/**
 * Used when starting a chat with more than one person
 *
 * @see OpenSingleChatRequest for use in a chat with only one person
 */
export interface OpenGroupChatRequest extends OpenChatRequest {
    /**
     * Array containing [Microsoft Entra UPNs](https://learn.microsoft.com/entra/identity/hybrid/connect/plan-connect-userprincipalname) (usually but not always an e-mail address)
     * of users with whom to begin a chat
     */
    users: string[];
    /**
     * The display name of a conversation for 3 or more users (chats with fewer than three users will ignore this field)
     */
    topic?: string;
}
/**
 * Contains functionality to start chat with others
 */
/**
 * Allows the user to open a chat with a single user and allows
 * for the user to specify the message they wish to send.
 *
 * @param openChatRequest: {@link OpenSingleChatRequest}- a request object that contains a user's email as well as an optional message parameter.
 *
 * @returns Promise resolved upon completion
 */
export declare function openChat(openChatRequest: OpenSingleChatRequest): Promise<void>;
/**
 * Allows the user to create a chat with multiple users (2+) and allows
 * for the user to specify a message and name the topic of the conversation. If
 * only 1 user is provided into users array default back to origin openChat.
 *
 * @param openChatRequest: {@link OpenGroupChatRequest} - a request object that contains a list of user emails as well as optional parameters for message and topic (display name for the group chat).
 *
 * @returns Promise resolved upon completion
 */
export declare function openGroupChat(openChatRequest: OpenGroupChatRequest): Promise<void>;
/**
 * Checks if the chat capability is supported by the host
 * @returns boolean to represent whether the chat capability is supported
 *
 * @throws Error if {@linkcode app.initialize} has not successfully completed
 */
export declare function isSupported(): boolean;
export {};