/// <summary>
/// Save current day-chunk arrangement if there are changes
/// </summary>
public void SaveChunks(bool force = false)
{
if (!force && !VM.Chunks.Any(c => c.IsDirty))
{
return;
}
var gday = Globals.DayChunks.Days.FirstOrDefault(d => d.Date == Date);
if (gday == null)
{
gday = new MultiDayChunkSet.DayChunkSet {
Date = Date
}; Globals.DayChunks.Days.Add(gday);
}
bool isFirst = true;
gday.Chunks.Clear();
foreach (var c in VM.Chunks)
{
c.IsDirty = false;
long[] boxIds = null;
if (!isFirst)
{
boxIds = c.Items.Select(i => i.Persistent.Box.RowId).ToArray();
}
gday.Chunks.Add(new MultiDayChunkSet.Chunk {
Title = c.Title, BoxIds = boxIds
});
isFirst = false;
}
Globals.UI.SaveDayChunks();
}
/// <summary>
/// loose hashing algorithm to detect changes in a set of displayable data
/// </summary>
static int HashContent(List <AgendaEntry> agendaItems, MultiDayChunkSet.DayChunkSet chunkList)
{
if (chunkList == null || agendaItems == null)
{
return(0);
}
unchecked
{
int hash = 0;
foreach (var a in agendaItems)
{
hash += (int)a.Box.RowId + a.Box.Title.GetHashCode() + a.Box.BoxTime.GetHashCode();
}
foreach (var c in chunkList.Chunks)
{
int titleHash = c.Title.GetHashCode();
hash += titleHash;
if (c.BoxIds != null && c.BoxIds.Length > 0)
{
hash += (int)c.BoxIds.Sum(id => id + titleHash);
}
}
hash += chunkList.Date.GetHashCode();
return(hash);
}
}
