/// <summary>
/// Searches.
/// </summary>
/// <param name="set">The database set.</param>
/// <param name="q">The query arguments.</param>
/// <param name="mapQuery">The map query handler.</param>
/// <param name="cancellationToken">The optional token to monitor for cancellation requests.</param>
/// <returns>A collection of entity.</returns>
public static async Task <CollectionResult <T> > SearchAsync <T>(DbSet <T> set, QueryData q, Action <QueryPredication <T> > mapQuery, CancellationToken cancellationToken = default) where T : BaseResourceEntity
{
if (set == null)
{
return(null);
}
if (q == null)
{
return(new CollectionResult <T>(await set.ListEntities(new QueryArgs()).ToListAsync(cancellationToken), 0));
}
if (q.Count == 1 && q.ContainsKey("id"))
{
var ids = q.GetValues("id").Where(ele => !string.IsNullOrWhiteSpace(ele));
var list = new List <T>();
foreach (var id in ids)
{
var entity = await set.GetByIdAsync(id, false, cancellationToken);
list.Add(entity);
}
var result = new CollectionResult <T>(list, 0, list.Count);
return(result);
}
QueryArgs args = q;
var col = set.ListEntities(args, l =>
{
var info = new QueryPredication <T>(l, q);
mapQuery?.Invoke(info);
return(info.Data);
});
if (col is null)
{
return(new CollectionResult <T>(null, args.Offset));
}
return(new CollectionResult <T>(await col.ToListAsync(cancellationToken), args.Offset));
}
