EditingValue.cpp

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#include "editing/EditingValue.h"
 
#include <type_traits>
 
namespace eve::editing {
 
Value::Type Value::type() const { return static_cast<Type>(storage_.index()); }
 
namespace {
 
struct ValueBudget {
    size_t elements    = 0;
    size_t stringBytes = 0;
};
 
bool checkValue(const Value& value, size_t depth, size_t maxDepth, size_t maxElements, size_t maxStringBytes,
                ValueBudget& budget) {
    if (depth > maxDepth) return false;
    return std::visit(
        [&](const auto& current) -> bool {
            using T = std::decay_t<decltype(current)>;
            if constexpr (std::is_same_v<T, std::string>) {
                budget.stringBytes += current.size();
                return budget.stringBytes <= maxStringBytes;
            } else if constexpr (std::is_same_v<T, Value::Array>) {
                budget.elements += current.size();
                if (budget.elements > maxElements) return false;
                for (const auto& entry : current)
                    if (!checkValue(entry, depth + 1, maxDepth, maxElements, maxStringBytes, budget)) return false;
                return true;
            } else if constexpr (std::is_same_v<T, Value::Object>) {
                budget.elements += current.size();
                if (budget.elements > maxElements) return false;
                for (const auto& [key, entry] : current) {
                    budget.stringBytes += key.size();
                    if (budget.stringBytes > maxStringBytes ||
                        !checkValue(entry, depth + 1, maxDepth, maxElements, maxStringBytes, budget))
                        return false;
                }
                return true;
            } else {
                return true;
            }
        },
        value.storage());
}
 
}  // namespace
 
bool Value::isWithinLimits(size_t maxDepth, size_t maxElements, size_t maxStringBytes) const {
    if (maxDepth == 0) return false;
    ValueBudget budget;
    return checkValue(*this, 1, maxDepth, maxElements, maxStringBytes, budget);
}
 
}  // namespace eve::editing