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Ref T286, JSON utility functions

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This commit is contained in:
Klaus Basan
2018-07-03 19:35:01 +02:00
parent 3b371d3177
commit fa09a6e53b
2 changed files with 106 additions and 1 deletions
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84
src/blackmisc/json.cpp
View File

@@ -548,5 +548,89 @@ namespace BlackMisc
{
return (object.contains("data"));
}
QString firstJsonValueAsString(const QString &json)
{
static const QString empty;
if (json.isEmpty()) { return empty; }
const QJsonObject obj = jsonObjectFromString(json);
return firstJsonValueAsString(obj);
}
QString firstJsonValueAsString(const QJsonObject &json)
{
static const QString empty;
if (json.isEmpty()) { return empty; }
const QStringList keys1 = json.keys();
if (keys1.isEmpty()) { return empty; }
if (keys1.contains("value", Qt::CaseInsensitive))
{
return json.value("value").toString();
}
const QJsonObject jsonLevel1 = json.value(keys1.front()).toObject();
return jsonLevel1.value("value").toString();
}
QStringList firstJsonValueAsStringList(const QString &json)
{
static const QStringList empty;
if (json.isEmpty()) { return empty; }
const QJsonObject obj = jsonObjectFromString(json);
return firstJsonValueAsStringList(obj);
}
int firstJsonValueAsInt(const QString &json, int defaultValue, bool *ok)
{
if (ok) { *ok = false; }
if (json.isEmpty()) { return defaultValue; }
const QJsonObject obj = jsonObjectFromString(json);
return firstJsonValueAsInt(obj, defaultValue, ok);
}
int firstJsonValueAsInt(const QJsonObject &json, int defaultValue, bool *ok)
{
if (ok) { *ok = false; }
if (json.isEmpty()) { return defaultValue; }
const QStringList keys1 = json.keys();
if (keys1.isEmpty()) { return defaultValue; }
if (keys1.contains("value", Qt::CaseInsensitive))
{
if (ok) { *ok = true; }
return json.value("value").toInt(defaultValue);
}
const QJsonObject jsonLevel1 = json.value(keys1.front()).toObject();
if (!jsonLevel1.contains("value")) { return defaultValue; }
if (ok) { *ok = true; }
return jsonLevel1.value("value").toInt(defaultValue);
}
QStringList firstJsonValueAsStringList(const QJsonObject &json)
{
static const QStringList empty;
if (json.isEmpty()) { return empty; }
const QStringList keys1 = json.keys();
if (keys1.isEmpty()) { return empty; }
if (keys1.contains("value", Qt::CaseInsensitive))
{
return arrayToQStringList(json.value("value").toArray());
}
const QJsonObject jsonLevel1 = json.value(keys1.front()).toObject();
return arrayToQStringList(jsonLevel1.value("value").toArray());
}
QStringList arrayToQStringList(const QJsonArray &array)
{
QStringList sl;
if (array.isEmpty()) { return sl; }
for (int i = 0; i < array.size(); i++)
{
if (!array.at(i).isString()) { continue; }
sl.push_back(array.at(i).toString());
}
return sl;
}
} // ns
} // ns

23
src/blackmisc/json.h
View File

@@ -24,7 +24,7 @@
#include <QJsonObject>
#include <QJsonValue>
#include <QJsonValueRef>
#include <QString>
#include <QStringList>
#include <QtGlobal>
#include <type_traits>
#include <utility>
@@ -247,6 +247,27 @@ namespace BlackMisc
//! \ingroup JSON
BLACKMISC_EXPORT QJsonArray jsonArrayFromString(const QString &json);
//! First JSON string object marked as "value"
BLACKMISC_EXPORT QString firstJsonValueAsString(const QString &json);
//! First JSON string object marked as "value"
BLACKMISC_EXPORT QString firstJsonValueAsString(const QJsonObject &json);
//! First JSON string object marked as "value"
BLACKMISC_EXPORT int firstJsonValueAsInt(const QString &json, int defaultValue = -1, bool *ok = nullptr);
//! First JSON string object marked as "value"
BLACKMISC_EXPORT int firstJsonValueAsInt(const QJsonObject &json, int defaultValue = -1, bool *ok = nullptr);
//! First JSON string list object marked as "value"
BLACKMISC_EXPORT QStringList firstJsonValueAsStringList(const QString &json);
//! First JSON string list object marked as "value"
BLACKMISC_EXPORT QStringList firstJsonValueAsStringList(const QJsonObject &json);
//! JSON array to QStringList
BLACKMISC_EXPORT QStringList arrayToQStringList(const QJsonArray &array);
//! Creates an incremental json object from two existing objects
BLACKMISC_EXPORT QJsonObject getIncrementalObject(const QJsonObject &previousObject, const QJsonObject &currentObject);