/// <summary>
/// Initializes a new instance of the <see cref="MessagesViewModel" /> class.
/// </summary>
/// <param name="id">The identifier.</param>
/// <param name="currentUser">The current user.</param>
/// <param name="messageFunc">The message function.</param>
/// <param name="groupId">The group identifier.</param>
private MessagesViewModel(int id, User currentUser, MessageCollection.MessageFunc messageFunc, int?groupId = null)
: base(TimeSpan.FromMinutes(5))
{
this.Id = id;
this.CurrentUser = currentUser.ThrowIfNull(nameof(currentUser));
this.MessageCollection = new MessageCollection(messageFunc.ThrowIfNull(nameof(messageFunc)));
this.GroupId = groupId;
this.LastRefresh = DateTimeOffset.UtcNow;
}
/// <summary>
/// Creates an instance, asynchronously.
/// </summary>
/// <param name="id">The identifier.</param>
/// <param name="messageFunc">The message function.</param>
/// <param name="groupId">The group identifier.</param>
/// <returns>
/// A created instance task.
/// </returns>
public static async Task <MessagesViewModel> CreateAsync(int id, MessageCollection.MessageFunc messageFunc, int?groupId = null)
{
User currentUser = await YammerService.Instance.GetCurrentUserAsync();
return(new MessagesViewModel(id, currentUser, messageFunc, groupId));
}
