osb/source/core/StarFormattedJson.hpp

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2023-06-20 04:33:09 +00:00
#ifndef STAR_JSON_COMMENTS_HPP
#define STAR_JSON_COMMENTS_HPP
#include <list>
#include "StarJson.hpp"
namespace Star {
STAR_CLASS(FormattedJson);
struct ObjectElement;
struct ObjectKeyElement;
struct ValueElement;
struct WhitespaceElement;
struct ColonElement;
struct CommaElement;
typedef Variant<ValueElement, ObjectKeyElement, WhitespaceElement, ColonElement, CommaElement> JsonElement;
struct ValueElement {
ValueElement(FormattedJson const& json);
FormattedJsonPtr value;
bool operator==(ValueElement const& v) const;
};
struct ObjectKeyElement {
String key;
bool operator==(ObjectKeyElement const& v) const;
};
struct WhitespaceElement {
String whitespace;
bool operator==(WhitespaceElement const& v) const;
};
struct ColonElement {
bool operator==(ColonElement const&) const;
};
struct CommaElement {
bool operator==(CommaElement const&) const;
};
std::ostream& operator<<(std::ostream& os, JsonElement const& elem);
// Class representing formatted JSON data. Preserves whitespace and comments.
class FormattedJson {
public:
typedef List<JsonElement> ElementList;
typedef size_t ElementLocation;
static FormattedJson parse(String const& string);
static FormattedJson parseJson(String const& string);
static FormattedJson ofType(Json::Type type);
FormattedJson();
FormattedJson(Json const&);
Json const& toJson() const;
FormattedJson get(String const& key) const;
FormattedJson get(size_t index) const;
// Returns a new FormattedJson with the given values added or erased.
// Prepend, insert and append update the value in-place if the key already
// exists.
FormattedJson prepend(String const& key, FormattedJson const& value) const;
FormattedJson insertBefore(String const& key, FormattedJson const& value, String const& beforeKey) const;
FormattedJson insertAfter(String const& key, FormattedJson const& value, String const& afterKey) const;
FormattedJson append(String const& key, FormattedJson const& value) const;
FormattedJson set(String const& key, FormattedJson const& value) const;
FormattedJson eraseKey(String const& key) const;
FormattedJson insert(size_t index, FormattedJson const& value) const;
FormattedJson append(FormattedJson const& value) const;
FormattedJson set(size_t index, FormattedJson const& value) const;
FormattedJson eraseIndex(size_t index) const;
// Returns the number of elements in a Json array, or entries in an object.
size_t size() const;
bool contains(String const& key) const;
Json::Type type() const;
bool isType(Json::Type type) const;
String typeName() const;
String toFormattedDouble() const;
String toFormattedInt() const;
String repr() const;
String printJson() const;
ElementList const& elements() const;
// Equality ignores whitespace and formatting. It just compares the Json
// values.
bool operator==(FormattedJson const& v) const;
bool operator!=(FormattedJson const& v) const;
private:
friend class FormattedJsonBuilderStream;
static FormattedJson object(ElementList const& elements);
static FormattedJson array(ElementList const& elements);
FormattedJson objectInsert(String const& key, FormattedJson const& value, ElementLocation loc) const;
void appendElement(JsonElement const& elem);
FormattedJson const& getFormattedJson(ElementLocation loc) const;
FormattedJson formattedAs(String const& formatting) const;
Json m_jsonValue;
ElementList m_elements;
// Used to preserve the formatting of numbers, i.e. -0 vs 0, 1.0 vs 1:
Maybe<String> m_formatting;
Maybe<ElementLocation> m_lastKey, m_lastValue;
Map<String, pair<ElementLocation, ElementLocation>> m_objectEntryLocations;
List<ElementLocation> m_arrayElementLocations;
};
std::ostream& operator<<(std::ostream& os, FormattedJson const& json);
}
template <> struct fmt::formatter<Star::FormattedJson> : ostream_formatter {};
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#endif