hyperion.ng/include/utils/jsonschema/QJsonFactory.h

140 lines
3.5 KiB
C
Raw Normal View History

#pragma once
#include <iostream>
#include <string>
#include <stdexcept>
#include <sstream>
// JSON-Schema includes
#include <utils/jsonschema/QJsonSchemaChecker.h>
#include <QFile>
#include <QString>
#include <QJsonObject>
#include <QJsonDocument>
#include <QRegularExpression>
class QJsonFactory
{
public:
static int load(const QString& schema, const QString& config, QJsonObject& json)
{
// Load the schema and the config trees
QJsonObject schemaTree = readSchema(schema);
QJsonObject configTree = readConfig(config);
// create the validator
QJsonSchemaChecker schemaChecker;
schemaChecker.setSchema(schemaTree);
bool valid = schemaChecker.validate(configTree);
for (std::list<std::string>::const_iterator i = schemaChecker.getMessages().begin(); i != schemaChecker.getMessages().end(); ++i)
{
std::cout << *i << std::endl;
}
if (!valid)
{
std::cerr << "Validation failed for configuration file: " << config.toStdString() << std::endl;
return -3;
}
json = configTree;
return 0;
}
static QJsonObject readConfig(const QString& path)
{
QFile file(path);
QJsonParseError error;
if (!file.open(QIODevice::ReadOnly))
{
std::stringstream sstream;
sstream << "Configuration file not found: '" << path.toStdString() << "' (" << file.errorString().toStdString() << ")";
throw std::runtime_error(sstream.str());
}
QString config = QString(file.readAll());
config.remove(QRegularExpression("([^:]?\\/\\/.*)"));
QJsonDocument doc = QJsonDocument::fromJson(config.toUtf8(), &error);
file.close();
if (error.error != QJsonParseError::NoError)
{
// report to the user the failure and their locations in the document.
int errorLine(0), errorColumn(0);
for( int i=0, count=qMin( error.offset,config.size()); i<count; ++i )
{
++errorColumn;
if(config.at(i) == '\n' )
{
errorColumn = 0;
++errorLine;
}
}
std::stringstream sstream;
sstream << "Failed to parse configuration: " << error.errorString().toStdString() << " at Line: " << errorLine << ", Column: " << errorColumn;
throw std::runtime_error(sstream.str());
}
return doc.object();
}
static QJsonObject readSchema(const QString& path)
{
QFile schemaData(path);
QJsonParseError error;
if (!schemaData.open(QIODevice::ReadOnly))
{
std::stringstream sstream;
sstream << "Schema not found: '" << path.toStdString() << "' (" << schemaData.errorString().toStdString() << ")";
throw std::runtime_error(sstream.str());
}
QByteArray schema = schemaData.readAll();
QJsonDocument doc = QJsonDocument::fromJson(schema, &error);
schemaData.close();
if (error.error != QJsonParseError::NoError)
{
// report to the user the failure and their locations in the document.
int errorLine(0), errorColumn(0);
for( int i=0, count=qMin( error.offset,schema.size()); i<count; ++i )
{
++errorColumn;
if(schema.at(i) == '\n' )
{
errorColumn = 0;
++errorLine;
}
}
std::stringstream sstream;
sstream << "ERROR: Json schema wrong: " << error.errorString().toStdString() << " at Line: " << errorLine << ", Column: " << errorColumn;
throw std::runtime_error(sstream.str());
}
return doc.object();
}
static void writeJson(const QString& filename, QJsonObject& jsonTree)
{
QJsonDocument doc;
doc.setObject(jsonTree);
QByteArray configData = doc.toJson(QJsonDocument::Indented);
QFile configFile(filename);
configFile.open(QIODevice::WriteOnly | QIODevice::Truncate);
configFile.write(configData);
configFile.close();
}
};