/// <summary>
/// Created By: Luke Frahm 4/22/2016
/// Update an existing announcement as changed by user and pass it to data access.
/// </summary>
/// <param name="announcement">Announcement object with all object details.</param>
/// <returns>Boolean based on result from data access layer.</returns>
public bool UpdateAnnouncement(Announcements announcement)
{
bool success;
try
{
success = AnnouncementAccessor.UpdateAnnouncement(announcement);
}
catch (Exception)
{
throw;
}
return(success);
}
/// <summary>
/// Created By: Luke Frahm 4/22/2016
/// Retrieve a list of all announcements from a group.
/// </summary>
/// <param name="groupID">The ID of the group to query for announcements.</param>
/// <returns>List of announcements based on result from data access layer.</returns>
public List <Announcements> GetAnnouncementsByGroupID(int groupID)
{
var announcements = new List <Announcements>();
try
{
announcements = AnnouncementAccessor.RetrieveAnnouncementsByGroupID(groupID);
}
catch (Exception)
{
throw;
}
return(announcements);
}
/// <summary>
/// Created By: Luke Frahm 4/22/2016
/// Take a new announcement created by user and pass it to data access.
/// </summary>
/// <param name="announcement">Announcement object with all object details.</param>
/// <returns>Boolean based on result from data access layer.</returns>
public bool CreateAnnouncement(int groupID, string Content, string username)
{
bool success;
try
{
var user = UserAccessor.RetrieveUserByUsername(username);
success = AnnouncementAccessor.CreateAnnouncement(groupID, Content, user);
}
catch (Exception)
{
success = false;
}
return(success);
}
/// <summary>
/// Created By: Luke Frahm 4/22/2016
/// Retrieve a list of most recent 10 announcements from a group.
/// </summary>
/// <param name="userID">User ID from logged in user to retrieve announcements at time of log in.</param>
/// <returns>List of announcements based on result from data access layer.</returns>
public List <Announcements> GetAnnouncementsByGroupIDTop10(int userID)
{
// create group manager and IEnumerable<Group> to hold group
GroupManager gm = new GroupManager();
var gl = gm.GetUserGroups(userID);
// initialize Lists to hold announcements
var allAnnouncments = new List <Announcements>();
var announcements = new List <Announcements>();
try
{
// search in each group the user belongs to
foreach (var g in gl)
{
// search and add 10 most recent announcements for the group
announcements = AnnouncementAccessor.RetrieveAnnouncementsByGroupIDTop10(g.GroupID);
// add these announcements to a list to be sent back: this holds all messages for all groups
foreach (var a in announcements)
{
allAnnouncments.Add(a);
}
}
}
catch (Exception)
{
throw;
}
// sort announcements by date: most recent at top
allAnnouncments.Sort((x, y) => x.Date.CompareTo(y.Date));
allAnnouncments.Reverse();
announcements.Clear();
for (int i = 0; i < 10 && i < allAnnouncments.Count; i++)
{
announcements.Add(allAnnouncments.ElementAt(i));
}
return(announcements);
}
