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#pragma once
#include <mbgl/style/conversion.hpp>
#include <mbgl/util/feature.hpp>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/variant.hpp>
#include <string>
#include <unordered_map>
namespace mbgl {
namespace style {
namespace conversion {
class Value;
using ValueMap = std::unordered_map<std::string, Value>;
using ValueVector = std::vector<Value>;
class Value : public mbgl::variant<std::string,
float,
double,
bool,
mapbox::util::recursive_wrapper<ValueMap>,
mapbox::util::recursive_wrapper<ValueVector>> {
using variant::variant;
};
inline bool isUndefined(const Value&) {
// Variant is always intialized
return false;
}
inline bool isArray(const Value& value) {
return value.is<mapbox::util::recursive_wrapper<ValueVector>>();
}
inline std::size_t arrayLength(const Value& value) {
return value.get<mapbox::util::recursive_wrapper<ValueVector>>().get().size();
}
inline Value arrayMember(const Value& value, std::size_t i) {
return value.get<mapbox::util::recursive_wrapper<ValueVector>>().get()[i];
}
inline bool isObject(const Value& value) {
return value.is<mapbox::util::recursive_wrapper<ValueMap>>();
}
inline optional<Value> objectMember(const Value& value, const char* key) {
auto map = value.get<ValueMap>();
auto iter = map.find(key);
if (iter != map.end()) {
return iter->second;
} else {
return {};
}
}
using EachMemberFn = std::function<optional<Error>(const std::string&, const Value&)>;
optional<Error> eachMember(const Value& value, EachMemberFn&& fn) {
auto map = value.get<ValueMap>();
auto iter = map.begin();
while (iter != map.end()) {
optional<Error> result = fn(iter->first, iter->second);
if (result) {
return result;
}
++iter;
}
return {};
}
inline optional<bool> toBool(const Value& value) {
if (value.is<bool>()) {
return value.get<bool>();
} else {
return {};
}
}
inline optional<float> toNumber(const Value& value) {
if (value.is<float>()) {
return value.get<float>();
} else {
return {};
}
return {};
}
inline optional<double> toDouble(const Value& value) {
if (value.is<double>()) {
return value.get<double>();
}
return {};
}
inline optional<std::string> toString(const Value& value) {
if (value.is<std::string>()) {
return value.get<std::string>();
} else {
return {};
}
}
inline optional<mbgl::Value> toValue(const Value& value) {
if (value.is<bool>()) {
return { value.get<bool>() };
} else if (value.is<std::string>()) {
return { value.get<std::string>() };
} else if (value.is<float>()) {
return { double(value.get<float>()) };
} else {
return {};
}
}
} // namespace conversion
} // namespace style
} // namespace mbgl
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