public async Task AddRemove(Context ctx, PKMember target, Groups.AddRemoveOperation op)
{
ctx.CheckSystem().CheckOwnMember(target);
var groups = (await ctx.ParseGroupList(ctx.System.Id))
.Select(g => g.Id)
.Distinct()
.ToList();
await using var conn = await _db.Obtain();
var existingGroups = (await _repo.GetMemberGroups(conn, target.Id).ToListAsync())
.Select(g => g.Id)
.Distinct()
.ToList();
List <GroupId> toAction;
if (op == Groups.AddRemoveOperation.Add)
{
toAction = groups
.Where(group => !existingGroups.Contains(group))
.ToList();
await _repo.AddGroupsToMember(conn, target.Id, toAction);
}
else if (op == Groups.AddRemoveOperation.Remove)
{
toAction = groups
.Where(group => existingGroups.Contains(group))
.ToList();
await _repo.RemoveGroupsFromMember(conn, target.Id, toAction);
}
else
{
return; // otherwise toAction "may be unassigned"
}
await ctx.Reply(MiscUtils.GroupAddRemoveResponse <GroupId>(groups, toAction, op));
}
