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#include <mbgl/style/conversion/tileset.hpp>
#include <mbgl/util/geo.hpp>
namespace mbgl {
namespace style {
namespace conversion {
bool validateLatitude(const double lat) {
return lat <= 90 && lat >= -90;
}
optional<Tileset> Converter<Tileset>::operator()(const Convertible& value, Error& error) const {
Tileset result;
auto tiles = objectMember(value, "tiles");
if (!tiles) {
error = { "source must have tiles" };
return {};
}
if (!isArray(*tiles)) {
error = { "source tiles must be an array" };
return {};
}
for (std::size_t i = 0; i < arrayLength(*tiles); i++) {
optional<std::string> urlTemplate = toString(arrayMember(*tiles, i));
if (!urlTemplate) {
error = { "source tiles member must be a string" };
return {};
}
result.tiles.push_back(std::move(*urlTemplate));
}
auto schemeValue = objectMember(value, "scheme");
if (schemeValue) {
optional<std::string> scheme = toString(*schemeValue);
if (scheme && *scheme == "tms") {
result.scheme = Tileset::Scheme::TMS;
}
}
auto minzoomValue = objectMember(value, "minzoom");
if (minzoomValue) {
optional<float> minzoom = toNumber(*minzoomValue);
if (!minzoom || *minzoom < 0 || *minzoom > std::numeric_limits<uint8_t>::max()) {
error = { "invalid minzoom" };
return {};
}
result.zoomRange.min = *minzoom;
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom || *maxzoom < 0 || *maxzoom > std::numeric_limits<uint8_t>::max()) {
error = { "invalid maxzoom" };
return {};
}
result.zoomRange.max = *maxzoom;
}
auto attributionValue = objectMember(value, "attribution");
if (attributionValue) {
optional<std::string> attribution = toString(*attributionValue);
if (!attribution) {
error = { "source attribution must be a string" };
return {};
}
result.attribution = std::move(*attribution);
}
auto boundsValue = objectMember(value, "bounds");
if (boundsValue) {
if (!isArray(*boundsValue) || arrayLength(*boundsValue) != 4) {
error = { "bounds must be an array with left, bottom, top, and right values" };
return {};
}
optional<double> left = toDouble(arrayMember(*boundsValue, 0));
optional<double> bottom = toDouble(arrayMember(*boundsValue, 1));
optional<double> right = toDouble(arrayMember(*boundsValue, 2));
optional<double> top = toDouble(arrayMember(*boundsValue, 3));
if (!left || !right || !bottom || !top) {
error = { "bounds array must contain numeric longitude and latitude values" };
return {};
}
if (!validateLatitude(*bottom) || !validateLatitude(*top) || top <= bottom){
error = { "bounds latitude values must be between -90 and 90 with bottom less than top" };
return {};
}
if(*left >= *right) {
error = { "bounds left longitude should be less than right longitude" };
return {};
}
result.bounds = LatLngBounds::hull({ *bottom, *left }, { *top, *right });
}
return result;
}
} // namespace conversion
} // namespace style
} // namespace mbgl
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