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#import "MGLGeoJSONSource.h"
#import "MGLSource_Private.h"
#import "MGLFeature_Private.h"
#import "NSURL+MGLAdditions.h"
#include <mbgl/style/sources/geojson_source.hpp>
NSString * const MGLGeoJSONClusterOption = @"MGLGeoJSONCluster";
NSString * const MGLGeoJSONClusterRadiusOption = @"MGLGeoJSONClusterRadius";
NSString * const MGLGeoJSONClusterMaximumZoomLevelOption = @"MGLGeoJSONClusterMaximumZoomLevel";
NSString * const MGLGeoJSONMaximumZoomLevelOption = @"MGLGeoJSONMaximumZoomLevel";
NSString * const MGLGeoJSONBufferOption = @"MGLGeoJSONBuffer";
NSString * const MGLGeoJSONToleranceOption = @"MGLGeoJSONOptionsClusterTolerance";
@interface MGLGeoJSONSource ()
@property (nonatomic, readwrite) NSDictionary *options;
@end
@implementation MGLGeoJSONSource
- (instancetype)initWithSourceIdentifier:(NSString *)sourceIdentifier geoJSONData:(NSData *)data
{
if (self = [super initWithSourceIdentifier:sourceIdentifier])
{
_geoJSONData = data;
}
return self;
}
- (instancetype)initWithSourceIdentifier:(NSString *)sourceIdentifier geoJSONData:(NSData *)data options:(NS_DICTIONARY_OF(NSString *, id) *)options
{
if (self = [super initWithSourceIdentifier:sourceIdentifier])
{
_geoJSONData = data;
_options = options;
}
return self;
}
- (instancetype)initWithSourceIdentifier:(NSString *)sourceIdentifier URL:(NSURL *)url
{
if (self = [super initWithSourceIdentifier:sourceIdentifier])
{
_URL = url;
}
return self;
}
- (instancetype)initWithSourceIdentifier:(NSString *)sourceIdentifier URL:(NSURL *)url options:(NS_DICTIONARY_OF(NSString *, id) *)options
{
if (self = [super initWithSourceIdentifier:sourceIdentifier])
{
_URL = url;
_options = options;
}
return self;
}
- (mbgl::style::GeoJSONOptions)geoJSONOptions
{
auto mbglOptions = mbgl::style::GeoJSONOptions();
if (self.options[MGLGeoJSONMaximumZoomLevelOption]) {
id value = self.options[MGLGeoJSONMaximumZoomLevelOption];
[self validateValue:value];
mbglOptions.maxzoom = [value integerValue];
}
if (self.options[MGLGeoJSONBufferOption]) {
id value = self.options[MGLGeoJSONBufferOption];
[self validateValue:value];
mbglOptions.buffer = [value integerValue];
}
if (self.options[MGLGeoJSONToleranceOption]) {
id value = self.options[MGLGeoJSONToleranceOption];
[self validateValue:value];
mbglOptions.tolerance = [value doubleValue];
}
if (self.options[MGLGeoJSONClusterRadiusOption]) {
id value = self.options[MGLGeoJSONClusterRadiusOption];
[self validateValue:value];
mbglOptions.clusterRadius = [value integerValue];
}
if (self.options[MGLGeoJSONClusterMaximumZoomLevelOption]) {
id value = self.options[MGLGeoJSONClusterMaximumZoomLevelOption];
[self validateValue:value];
mbglOptions.clusterMaxZoom = [value integerValue];
}
if (self.options[MGLGeoJSONClusterOption]) {
id value = self.options[MGLGeoJSONClusterOption];
[self validateValue:value];
mbglOptions.cluster = [value boolValue];
}
return mbglOptions;
}
- (void)validateValue:(id)value
{
if (! [value isKindOfClass:[NSNumber class]])
{
[NSException raise:@"Value not handled" format:@"%@ is not an NSNumber", value];
}
}
- (std::unique_ptr<mbgl::style::Source>)mbglSource
{
auto source = std::make_unique<mbgl::style::GeoJSONSource>(self.sourceIdentifier.UTF8String, [self geoJSONOptions]);
if (self.URL) {
NSURL *url = self.URL.mgl_URLByStandardizingScheme;
source->setURL(url.absoluteString.UTF8String);
} else {
NSString *string = [[NSString alloc] initWithData:self.geoJSONData encoding:NSUTF8StringEncoding];
const auto geojson = mapbox::geojson::parse(string.UTF8String).get<mapbox::geojson::feature_collection>();
source->setGeoJSON(geojson);
_features = MGLFeaturesFromMBGLFeatures(geojson);
}
return std::move(source);
}
@end
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