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#include "cru/base/PropertyTree.h"
#include "cru/base/Exception.h"
namespace cru {
std::string PropertySubTreeRef::CombineKey(std::string_view left,
std::string_view right) {
return PropertyTree::CombineKey(left, right);
}
PropertySubTreeRef::PropertySubTreeRef(PropertyTree* tree, std::string path)
: tree_(tree), path_(std::move(path)) {
Expects(tree);
}
PropertySubTreeRef PropertySubTreeRef::GetParent() const {
for (Index i = path_.size() - 1; i >= 0; i--) {
if (path_[i] == '.') {
return PropertySubTreeRef(tree_, path_.substr(0, i));
}
}
return PropertySubTreeRef(tree_, {});
}
PropertySubTreeRef PropertySubTreeRef::GetChild(const std::string& key) const {
return PropertySubTreeRef(tree_, CombineKey(path_, key));
}
std::string PropertySubTreeRef::GetValue(const std::string& key) const {
return tree_->GetValue(CombineKey(path_, key));
}
void PropertySubTreeRef::SetValue(const std::string& key, std::string value) {
tree_->SetValue(CombineKey(path_, key), std::move(value));
}
void PropertySubTreeRef::DeleteValue(const std::string& key) {
tree_->DeleteValue(CombineKey(path_, key));
}
std::string PropertyTree::CombineKey(std::string_view left,
std::string_view right) {
return std::string(left) + std::string(left.empty() ? "" : ".") +
std::string(right);
}
PropertyTree::PropertyTree(std::unordered_map<std::string, std::string> values)
: values_(std::move(values)) {}
std::string PropertyTree::GetValue(const std::string& key) const {
auto it = values_.find(key);
if (it == values_.end()) {
throw Exception("Property tree has no value.");
}
return it->second;
}
void PropertyTree::SetValue(const std::string& key, std::string value) {
values_[key] = std::move(value);
}
void PropertyTree::DeleteValue(const std::string& key) {
auto it = values_.find(key);
if (it != values_.end()) {
values_.erase(it);
}
}
PropertySubTreeRef PropertyTree::GetSubTreeRef(const std::string& path) {
return PropertySubTreeRef(this, path);
}
} // namespace cru
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