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- /*
- * JsonDetail.h, part of VCMI engine
- *
- * Authors: listed in file AUTHORS in main folder
- *
- * License: GNU General Public License v2.0 or later
- * Full text of license available in license.txt file, in main folder
- *
- */
- #pragma once
- #include "JsonNode.h"
- class JsonWriter
- {
- //prefix for each line (tabulation)
- std::string prefix;
- std::ostream &out;
- public:
- template<typename Iterator>
- void writeContainer(Iterator begin, Iterator end);
- void writeEntry(JsonMap::const_iterator entry);
- void writeEntry(JsonVector::const_iterator entry);
- void writeString(const std::string &string);
- void writeNode(const JsonNode &node);
- JsonWriter(std::ostream &output, const JsonNode &node);
- };
- //Tiny string class that uses const char* as data for speed, members are private
- //for ease of debugging and some compatibility with std::string
- class constString
- {
- const char *data;
- const size_t datasize;
- public:
- constString(const char * inputString, size_t stringSize):
- data(inputString),
- datasize(stringSize)
- {
- }
- inline size_t size() const
- {
- return datasize;
- };
- inline const char& operator[] (size_t position)
- {
- assert (position < datasize);
- return data[position];
- }
- };
- //Internal class for string -> JsonNode conversion
- class JsonParser
- {
- std::string errors; // Contains description of all encountered errors
- constString input; // Input data
- ui32 lineCount; // Currently parsed line, starting from 1
- size_t lineStart; // Position of current line start
- size_t pos; // Current position of parser
- //Helpers
- bool extractEscaping(std::string &str);
- bool extractLiteral(const std::string &literal);
- bool extractString(std::string &string);
- bool extractWhitespace(bool verbose = true);
- bool extractSeparator();
- bool extractElement(JsonNode &node, char terminator);
- //Methods for extracting JSON data
- bool extractArray(JsonNode &node);
- bool extractFalse(JsonNode &node);
- bool extractFloat(JsonNode &node);
- bool extractNull(JsonNode &node);
- bool extractString(JsonNode &node);
- bool extractStruct(JsonNode &node);
- bool extractTrue(JsonNode &node);
- bool extractValue(JsonNode &node);
- //Add error\warning message to list
- bool error(const std::string &message, bool warning=false);
- public:
- JsonParser(const char * inputString, size_t stringSize);
- /// do actual parsing. filename is name of file that will printed to console if any errors were found
- JsonNode parse(std::string fileName);
- /// returns true if parsing was successful
- bool isValid();
- };
- //Internal class for Json validation. Mostly compilant with json-schema v4 draft
- namespace Validation
- {
- /// struct used to pass data around during validation
- struct ValidationData
- {
- /// path from root node to current one.
- /// JsonNode is used as variant - either string (name of node) or as float (index in list)
- std::vector<JsonNode> currentPath;
- /// Stack of used schemas. Last schema is the one used currently.
- /// May contain multiple items in case if remote references were found
- std::vector<std::string> usedSchemas;
- /// generates error message
- std::string makeErrorMessage(const std::string &message);
- };
- typedef std::function<std::string(const JsonNode &)> TFormatValidator;
- typedef std::unordered_map<std::string, TFormatValidator> TFormatMap;
- typedef std::function<std::string(ValidationData &, const JsonNode &, const JsonNode &, const JsonNode &)> TFieldValidator;
- typedef std::unordered_map<std::string, TFieldValidator> TValidatorMap;
- /// map of known fields in schema
- const TValidatorMap & getKnownFieldsFor(JsonNode::JsonType type);
- const TFormatMap & getKnownFormats();
- std::string check(std::string schemaName, const JsonNode & data);
- std::string check(std::string schemaName, const JsonNode & data, ValidationData & validator);
- std::string check(const JsonNode & schema, const JsonNode & data, ValidationData & validator);
- }
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