public async Task <string> JoinGroup(Interfaces.IRepository repo, string u, string g)
{
string msg = "";
string groupId = g;
var group = await repo.GetGroupAsync(groupId);
if (group == null)
{
msg = "group does not exist";
return(msg);
}
UserDataModel user = await repo.GetUser(u);
if (user == null)
{
msg = "user does not exist";
return(msg);
}
if (group.MemberCount >= LibrarySettings.MAX_MEMBERS)
{
msg = group.Name + " reached maximum number of members";
}
else
{
// join group
user.Groups.Add(groupId);
await repo.UpdateUserAsync(user);
group.MemberCount++;
msg = u + " joined group " + group.Name;
await repo.UpdateGroupAsync(group);
}
return(msg);
}
public async Task <string> LeaveGroup(Interfaces.IRepository repo, string u, string g)
{
string msg = "";
string groupId = g;
var group = await repo.GetGroupAsync(groupId);
if (group == null)
{
msg = "group does not exist";
return(msg);
}
UserDataModel user = await repo.GetUser(u);
if (user == null)
{
msg = "user does not exist";
return(msg);
}
if (user.Groups.Contains(groupId))
{
// leave group
user.Groups.Remove(groupId);
await repo.UpdateUserAsync(user);
group.MemberCount--;
msg = u + " left group " + group.Name;
await repo.UpdateGroupAsync(group);
}
return(msg);
}