hyperion.ng/libsrc/hyperion/SettingsManager.cpp

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// proj
#include <hyperion/SettingsManager.h>
// util
#include <utils/JsonUtils.h>
#include <db/SettingsTable.h>
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// json schema process
#include <utils/jsonschema/QJsonFactory.h>
#include <utils/jsonschema/QJsonSchemaChecker.h>
// write config to filesystem
#include <utils/JsonUtils.h>
QJsonObject SettingsManager::schemaJson;
SettingsManager::SettingsManager(const quint8& instance, QObject* parent)
: QObject(parent)
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, _log(Logger::getInstance("SettingsManager"))
, _sTable(new SettingsTable(instance, this))
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{
// get schema
if(schemaJson.isEmpty())
{
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Q_INIT_RESOURCE(resource);
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try
{
schemaJson = QJsonFactory::readSchema(":/hyperion-schema");
}
catch(const std::runtime_error& error)
{
throw std::runtime_error(error.what());
}
}
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// get default config
QJsonObject defaultConfig;
if(!JsonUtils::readFile(":/hyperion_default.config", defaultConfig, _log))
throw std::runtime_error("Failed to read default config");
// transform json to string lists
QStringList keyList = defaultConfig.keys();
QStringList defValueList;
for(const auto key : keyList)
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{
if(defaultConfig[key].isObject())
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{
defValueList << QString(QJsonDocument(defaultConfig[key].toObject()).toJson(QJsonDocument::Compact));
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}
else if(defaultConfig[key].isArray())
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{
defValueList << QString(QJsonDocument(defaultConfig[key].toArray()).toJson(QJsonDocument::Compact));
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}
}
// fill database with default data if required
for(const auto key : keyList)
{
QString val = defValueList.takeFirst();
// prevent overwrite
if(!_sTable->recordExist(key))
_sTable->createSettingsRecord(key,val);
}
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// need to validate all data in database constuct the entire data object
// TODO refactor schemaChecker to accept QJsonArray in validate(); QJsonDocument container? To validate them per entry...
QJsonObject dbConfig;
for(const auto key : keyList)
{
QJsonDocument doc = _sTable->getSettingsRecord(key);
if(doc.isArray())
dbConfig[key] = doc.array();
else
dbConfig[key] = doc.object();
}
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// validate full dbconfig against schema, on error we need to rewrite entire table
QJsonSchemaChecker schemaChecker;
schemaChecker.setSchema(schemaJson);
QPair<bool,bool> valid = schemaChecker.validate(dbConfig);
// check if our main schema syntax is IO
if (!valid.second)
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{
foreach (auto & schemaError, schemaChecker.getMessages())
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Error(_log, "Schema Syntax Error: %s", QSTRING_CSTR(schemaError));
throw std::runtime_error("The config schema has invalid syntax. This should never happen! Go fix it!");
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}
if (!valid.first)
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{
Info(_log,"Table upgrade required...");
dbConfig = schemaChecker.getAutoCorrectedConfig(dbConfig);
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foreach (auto & schemaError, schemaChecker.getMessages())
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Warning(_log, "Config Fix: %s", QSTRING_CSTR(schemaError));
saveSettings(dbConfig);
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}
else
_qconfig = dbConfig;
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Debug(_log,"Settings database initialized")
}
const QJsonDocument SettingsManager::getSetting(const settings::type& type)
{
return _sTable->getSettingsRecord(settings::typeToString(type));
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}
bool SettingsManager::saveSettings(QJsonObject config, const bool& correct)
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{
// we need to validate data against schema
QJsonSchemaChecker schemaChecker;
schemaChecker.setSchema(schemaJson);
if (!schemaChecker.validate(config).first)
{
if(!correct)
{
Error(_log,"Failed to save configuration, errors during validation");
return false;
}
Warning(_log,"Fixing json data!");
config = schemaChecker.getAutoCorrectedConfig(config);
foreach (auto & schemaError, schemaChecker.getMessages())
Warning(_log, "Config Fix: %s", QSTRING_CSTR(schemaError));
}
// store the new config
_qconfig = config;
// extract keys and data
QStringList keyList = config.keys();
QStringList newValueList;
for(const auto key : keyList)
{
if(config[key].isObject())
{
newValueList << QString(QJsonDocument(config[key].toObject()).toJson(QJsonDocument::Compact));
}
else if(config[key].isArray())
{
newValueList << QString(QJsonDocument(config[key].toArray()).toJson(QJsonDocument::Compact));
}
}
// compare database data with new data to emit/save changes accordingly
for(const auto key : keyList)
{
QString data = newValueList.takeFirst();
if(_sTable->getSettingsRecordString(key) != data)
{
_sTable->createSettingsRecord(key, data);
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emit settingsChanged(settings::stringToType(key), QJsonDocument::fromJson(data.toLocal8Bit()));
}
}
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return true;
}