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#import "NSPredicate+MGLAdditions.h"
#import "MGLValueEvaluator.h"
class FilterEvaluator {
public:
NSArray* getPredicates(std::vector<mbgl::style::Filter> filters) {
NSMutableArray *predicates = [NSMutableArray arrayWithCapacity:filters.size()];
for (auto filter : filters) {
[predicates addObject:mbgl::style::Filter::visit(filter, FilterEvaluator())];
}
return predicates;
}
NSArray* getValues(std::vector<mbgl::Value> values) {
NSMutableArray *array = [NSMutableArray arrayWithCapacity:values.size()];
for (auto value : values) {
[array addObject:mbgl::Value::visit(value, ValueEvaluator())];
}
return array;
}
NSPredicate* operator()(mbgl::style::NullFilter filter) {
return nil;
}
NSPredicate* operator()(mbgl::style::EqualsFilter filter) {
return [NSPredicate predicateWithFormat:@"%K == %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::NotEqualsFilter filter) {
return [NSPredicate predicateWithFormat:@"%K != %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::GreaterThanFilter filter) {
return [NSPredicate predicateWithFormat:@"%K > %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::GreaterThanEqualsFilter filter) {
return [NSPredicate predicateWithFormat:@"%K >= %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::LessThanFilter filter) {
return [NSPredicate predicateWithFormat:@"%K < %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::LessThanEqualsFilter filter) {
return [NSPredicate predicateWithFormat:@"%K <= %@", @(filter.key.c_str()), mbgl::Value::visit(filter.value, ValueEvaluator())];
}
NSPredicate* operator()(mbgl::style::InFilter filter) {
return [NSPredicate predicateWithFormat:@"%K IN %@", @(filter.key.c_str()), getValues(filter.values)];
}
NSPredicate* operator()(mbgl::style::NotInFilter filter) {
return [NSPredicate predicateWithFormat:@"NOT %K IN %@", @(filter.key.c_str()), getValues(filter.values)];
}
NSPredicate* operator()(mbgl::style::AnyFilter filter) {
return [NSCompoundPredicate orPredicateWithSubpredicates:getPredicates(filter.filters)];
}
NSPredicate* operator()(mbgl::style::AllFilter filter) {
return [NSCompoundPredicate andPredicateWithSubpredicates:getPredicates(filter.filters)];
}
NSPredicate* operator()(mbgl::style::NoneFilter filter) {
NSArray *predicates = getPredicates(filter.filters);
if (predicates.count > 1) {
NSCompoundPredicate *predicate = [NSCompoundPredicate andPredicateWithSubpredicates:predicates];
return [NSCompoundPredicate notPredicateWithSubpredicate:predicate];
} else {
return [NSCompoundPredicate notPredicateWithSubpredicate:predicates.firstObject];
}
}
NSPredicate* operator()(mbgl::style::HasFilter filter) {
[NSException raise:@"Unsupported filter type"
format:@"Cannot convert mbgl::style::HasFilter to NSPredicate"];
return nil;
}
NSPredicate* operator()(mbgl::style::NotHasFilter filter) {
[NSException raise:@"Unsupported filter type"
format:@"Cannot convert mbgl::style::NotHasFilter to NSPredicate"];
return nil;
}
};
@implementation NSPredicate (MGLAdditions)
- (mbgl::style::Filter)mgl_filter
{
[NSException raise:@"Not supported"
format:@"NSPredicate doesn't implement ’-mgl_filter’. Try with NSComparisonPredicate or NSCompoundPredicate instead."];
return {};
}
+ (instancetype)mgl_predicateWithFilter:(mbgl::style::Filter)filter
{
FilterEvaluator evaluator;
return mbgl::style::Filter::visit(filter, evaluator);
}
@end
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