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#import "NSCompoundPredicate+MGLAdditions.h"
#import "NSPredicate+MGLAdditions.h"
#import "NSExpression+MGLAdditions.h"
@implementation NSCompoundPredicate (MGLAdditions)
- (std::vector<mbgl::style::Filter>)mgl_subfilters
{
std::vector<mbgl::style::Filter>filters;
for (NSPredicate *predicate in self.subpredicates) {
filters.push_back(predicate.mgl_filter);
}
return filters;
}
- (mbgl::style::Filter)mgl_filter
{
switch (self.compoundPredicateType) {
case NSNotPredicateType: {
// Translate a nested NSComparisonPredicate with operator type NSInPredicateOperatorType into a flat mbgl::NotIn filter.
NSArray<NSComparisonPredicate *> *comparisonPredicates = [self.subpredicates filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"class == %@", [NSComparisonPredicate class]]];
NSArray<NSComparisonPredicate *> *notInPredicates = [comparisonPredicates filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(NSComparisonPredicate *_Nonnull predicate, NSDictionary<NSString *,id> * _Nullable bindings) {
return predicate.predicateOperatorType == NSInPredicateOperatorType;
}]];
if (notInPredicates.count) {
auto filter = mbgl::style::NotInFilter();
filter.key = notInPredicates.firstObject.leftExpression.keyPath.UTF8String;
filter.values = notInPredicates.firstObject.rightExpression.mgl_filterValues;
return filter;
} else {
auto filter = mbgl::style::NoneFilter();
filter.filters = [self mgl_subfilters];
return filter;
}
}
case NSAndPredicateType: {
auto filter = mbgl::style::AllFilter();
filter.filters = [self mgl_subfilters];
return filter;
}
case NSOrPredicateType: {
auto filter = mbgl::style::AnyFilter();
filter.filters = [self mgl_subfilters];
return filter;
}
}
[NSException raise:@"Compound predicate type not handled"
format:@""];
return {};
}
@end
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