static void HandleItemsIteratorSession(object iterator, List <SearchItem> allItems, string id, SearchContext context, SearchFlags options)
{
if (iterator != null && options.HasAny(SearchFlags.Synchronous))
{
using (var stackedEnumerator = new SearchEnumerator <SearchItem>(iterator))
{
while (stackedEnumerator.MoveNext())
{
if (stackedEnumerator.Current != null)
{
allItems.Add(stackedEnumerator.Current);
}
}
}
}
else
{
var session = context.sessions.GetProviderSession(context, id);
session.Reset(context, iterator, k_MaxFetchTimeMs);
session.Start();
var sessionEnded = !session.FetchSome(allItems, k_MaxFetchTimeMs);
if (options.HasAny(SearchFlags.FirstBatchAsync))
{
session.SendItems(context.subset != null ? allItems.Intersect(context.subset) : allItems);
allItems.Clear();
}
if (sessionEnded)
{
session.Stop();
}
}
}
public virtual void Reset(object itemEnumerator, long maxFetchTimePerUpdate = k_MaxTimePerUpdate)
{
// Remove and add the event handler in case it was already removed.
Stop();
this.maxFetchTimePerUpdate = maxFetchTimePerUpdate;
if (itemEnumerator != null)
{
lock (this)
m_ItemsEnumerator = new SearchEnumerator <T>(itemEnumerator);
Utils.tick += OnUpdate;
}
}
/// <summary>
/// Hard reset an async search session.
/// </summary>
/// <param name="itemEnumerator">The enumerator that will yield new search results. This object can be an IEnumerator or IEnumerable</param>
/// <param name="maxFetchTimePerProviderMs">The amount of time allowed to yield new results.</param>
/// <remarks>Normally async search sessions are re-used per search provider.</remarks>
public void Reset(SearchContext context, object itemEnumerator, long maxFetchTimePerProviderMs = k_MaxTimePerUpdate)
{
// Remove and add the event handler in case it was already removed.
Stop();
searchInProgress = true;
m_Context = context;
maxFetchTimePerUpdate = maxFetchTimePerProviderMs;
if (itemEnumerator != null)
{
lock (this)
m_ItemsEnumerator = new SearchEnumerator <SearchItem>(itemEnumerator);
Utils.tick += OnUpdate;
}
}
/// <summary>
/// Initiate a search and return all search items matching the search context. Other items can be found later using the asynchronous searches.
/// </summary>
/// <param name="context">The current search context</param>
/// <param name="options">Options defining how the query will be performed</param>
/// <returns>A list of search items matching the search query.</returns>
public static List <SearchItem> GetItems(SearchContext context, SearchFlags options = SearchFlags.Default)
{
// Stop all search sessions every time there is a new search.
context.sessions.StopAllAsyncSearchSessions();
context.searchFinishTime = context.searchStartTime = DateTime.Now.Ticks;
context.sessionEnded -= OnSearchEnded;
context.sessionEnded += OnSearchEnded;
if (options.HasAny(SearchFlags.WantsMore))
{
context.wantsMore = true;
}
if (options.HasAny(SearchFlags.Synchronous))
{
context.options |= SearchFlags.Synchronous;
}
int fetchProviderCount = 0;
var allItems = new List <SearchItem>(3);
foreach (var provider in context.providers)
{
try
{
var watch = new System.Diagnostics.Stopwatch();
watch.Start();
fetchProviderCount++;
var iterator = provider.fetchItems(context, allItems, provider);
if (iterator != null && options.HasAny(SearchFlags.Synchronous))
{
using (var stackedEnumerator = new SearchEnumerator <SearchItem>(iterator))
{
while (stackedEnumerator.MoveNext())
{
if (stackedEnumerator.Current != null)
{
allItems.Add(stackedEnumerator.Current);
}
}
}
}
else
{
var session = context.sessions.GetProviderSession(context, provider.id);
session.Reset(context, iterator, k_MaxFetchTimeMs);
session.Start();
var sessionEnded = !session.FetchSome(allItems, k_MaxFetchTimeMs);
if (options.HasAny(SearchFlags.FirstBatchAsync))
{
session.SendItems(context.subset != null ? allItems.Intersect(context.subset) : allItems);
allItems.Clear();
}
if (sessionEnded)
{
session.Stop();
}
}
provider.RecordFetchTime(watch.Elapsed.TotalMilliseconds);
}
catch (Exception ex)
{
Debug.LogException(new Exception($"Failed to get fetch {provider.name} provider items.", ex));
}
}
if (fetchProviderCount == 0)
{
OnSearchEnded(context);
context.sessions.StopAllAsyncSearchSessions();
}
if (context.subset != null)
{
allItems = new List <SearchItem>(allItems.Intersect(context.subset));
}
if (!options.HasAny(SearchFlags.Sorted))
{
return(allItems);
}
allItems.Sort(SortItemComparer);
return(allItems.GroupBy(i => i.id).Select(i => i.First()).ToList());
}