//Determine whether or not to filter the input time series per the input criteria -
private List<TimeSeriesViewModel> filterTimeSeries(List<TimeSeriesViewModel> series, clientFilterAndSearchCriteria filterAndSearchCriteria)
{
//Validate/initialize input parameters...
if (null == series || 0 >= series.Count || filterAndSearchCriteria.isEmpty())
{
//Null or empty time series list and/or criteria - return early
return series;
}
//Prior to applying the criteria - copy the input time series
List<TimeSeriesViewModel> listFiltered = null;
//Initialize the LINQ predicate...
System.Linq.Expressions.Expression<Func<TimeSeriesViewModel, bool>> predicate;
//Apply search string (case-insensitive), if indicated...
//NOTE: The search string main contain space-delimited sub strings (e.g., 'SNOTEL 784' )
string search = filterAndSearchCriteria.search;
if (! String.IsNullOrWhiteSpace(search))
{
//Initialize the LINQ predicate...
//NOTE: Initializing the predicate to always return false and then adding ORs
// will select only those timeseries with values matching the search criteria
predicate = LinqPredicateBuilder.Create<TimeSeriesViewModel>(item => false);
//Scan datasources...
StringComparer comparer = StringComparer.CurrentCultureIgnoreCase;
foreach ( var datasource in filterAndSearchCriteria.dataSources)
{
if (! datasource.searchable)
{
continue; //NOT searchable - continue
}
//Searchable... add value to predicate...
if (null != datasource.dataSource)
{
//Value in TimeSeriesViewModel property...
var source = datasource.dataSource;
//Add TimeSeriesViewModel property to LINQ predicate
//NOTE: MUST specify a case-insensitive contains...
// Use null coalescing operator (??) to avoid null reference errors...
// source: http://stackoverflow.com/questions/16490509/how-to-assign-empty-string-if-the-value-is-null-in-linq-query
predicate = predicate.Or(item => (item.GetType().GetProperty(source).GetValue(item, null) ?? String.Empty).ToString().Contains(search, StringComparison.CurrentCultureIgnoreCase, new SearchStringComparer()));
}
else if (null != datasource.title)
{
//Lookup value from title...
// Use null coalescing operator (??) to avoid null reference errors...
// source: http://stackoverflow.com/questions/16490509/how-to-assign-empty-string-if-the-value-is-null-in-linq-query
predicate = predicate.Or(item => (LookupValueFromTitle(datasource, item) ?? String.Empty).ToString().Contains(search, StringComparison.CurrentCultureIgnoreCase, new SearchStringComparer()));
}
}
//Apply search criteria to current timeseries
var queryable = series.AsQueryable();
try
{
listFiltered = queryable.Where(predicate).ToList();
}
catch (Exception ex)
{
string msg = ex.Message;
//Error in filtering - set filtered list to unfiltered list...
listFiltered = series;
}
}
//Apply filters (case-insensitive), if indicated...
List<clientFilter> filters = filterAndSearchCriteria.filters;
if (0 < filters.Count)
{
//Initialize the LINQ predicate...
//NOTE: Initializing the predicate to always return true and then adding ANDs
// will select only those timeseries with values matching the filter(s)
predicate = LinqPredicateBuilder.Create<TimeSeriesViewModel>(item => true);
//Set the queryable collection - listFiltered (if search criteria already applied, otherwise series)
var queryable = (null != listFiltered) ? listFiltered.AsQueryable() : series.AsQueryable();
foreach (var filter in filters)
{
var source = filter.dataSource;
var value = filter.value;
//Add TimeSeriesViewModel property to LINQ predicate
//NOTE: MUST specify a case-insensitive equals...
predicate = predicate.And(item => item.GetType().GetProperty(source).GetValue(item, null).ToString().Equals(value, StringComparison.CurrentCultureIgnoreCase));
}
//Apply search criteria to current timeseries
listFiltered = queryable.Where(predicate).ToList();
}
//Processing complete - return
return listFiltered;
}
public List<ClusteredPin> transformSeriesDataCartIntoClusteredPin(List<TimeSeriesViewModel> series, clientFilterAndSearchCriteria filterAndSearchCriteria)
{
List<ClusteredPin> clusterPins = new List<ClusteredPin>();
bool bUseFilter = ! (null == filterAndSearchCriteria || filterAndSearchCriteria.isEmpty());
if ( bUseFilter) {
//Retrieve COPIES of all time series which match filter criteria...
series = filterTimeSeries(series, filterAndSearchCriteria);
}
for (int i = 0; i < series.Count; i++)
{
var cl = new ClusteredPin();
cl.Loc = new LatLong(series[i].Latitude, series[i].Longitude);
cl.assessmentids.Add(series[i].SeriesId);
cl.PinType = "point";
//Retain the service code, title and highest value count for later reference...
string key = series[i].ServCode;
string title = series[i].ServTitle;
cl.ServiceCodeToTitle[key] = title;
clusterPins.Add(cl);
}
return clusterPins;
}