// NOTE: Flaw in design resulting in need for specification of user-defined message type in service
/// <summary>
/// Retrieves a list of message listings' details that make up an inbox. Each message listing contains these details in this order:
/// Message ID, read status of the message, sent date, first name, and last name
/// </summary>
/// <param name="dao">Object used to access messages from a database</param>
/// <param name="receiverID">ID of the user who is retrieving messages from their inbox</param>
/// <param name="isGeneral">Boolean value indicating whether a message is a general message or not</param>
/// <returns>A list of message listing details</returns>
public IList <IList <string> > GetInbox(MessageDAO dao, int receiverID, bool isGeneral)
{
return(dao.ReadInboxFromDB(receiverID, isGeneral));
}