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/**
* \file json.cpp
*/
#include <QDateTime>
#include <QStringList>
#include "json.h"
namespace QtJson {
static QString dateFormat, dateTimeFormat;
static bool prettySerialize = false;
static QString sanitizeString(QString str);
static QByteArray join(const QList<QByteArray> &list, const QByteArray &sep);
static QVariant parseValue(const QString &json, int &index, bool &success);
static QVariant parseObject(const QString &json, int &index, bool &success);
static QVariant parseArray(const QString &json, int &index, bool &success);
static QVariant parseString(const QString &json, int &index, bool &success);
static QVariant parseNumber(const QString &json, int &index);
static int lastIndexOfNumber(const QString &json, int index);
static void eatWhitespace(const QString &json, int &index);
static int lookAhead(const QString &json, int index);
static int nextToken(const QString &json, int &index);
template<typename T>
QByteArray serializeMap(const T &map, bool &success, int _level = 0) {
QByteArray newline;
QByteArray tabs;
QByteArray tabsFields;
if (prettySerialize && !map.isEmpty()) {
newline = "\n";
for (uint l=1; l<_level; l++) {
tabs += " ";
}
tabsFields = tabs + " ";
}
QByteArray str = "{" + newline;
QList<QByteArray> pairs;
for (typename T::const_iterator it = map.begin(), itend = map.end(); it != itend; ++it) {
bool otherSuccess = true;
QByteArray serializedValue = serialize(it.value(), otherSuccess, _level);
if (serializedValue.isNull()) {
success = false;
break;
}
pairs << tabsFields + sanitizeString(it.key()).toUtf8() + ":" + (prettySerialize ? " " : "") + serializedValue;
}
str += join(pairs, "," + newline) + newline;
str += tabs + "}";
return str;
}
void insert(QVariant &v, const QString &key, const QVariant &value);
void append(QVariant &v, const QVariant &value);
template<typename T>
void cloneMap(QVariant &json, const T &map) {
for (typename T::const_iterator it = map.begin(), itend = map.end(); it != itend; ++it) {
insert(json, it.key(), (*it));
}
}
template<typename T>
void cloneList(QVariant &json, const T &list) {
for (typename T::const_iterator it = list.begin(), itend = list.end(); it != itend; ++it) {
append(json, (*it));
}
}
/**
* parse
*/
QVariant parse(const QString &json) {
bool success = true;
return parse(json, success);
}
/**
* parse
*/
QVariant parse(const QString &json, bool &success) {
success = true;
// Return an empty QVariant if the JSON data is either null or empty
if (!json.isNull() || !json.isEmpty()) {
QString data = json;
// We'll start from index 0
int index = 0;
// Parse the first value
QVariant value = parseValue(data, index, success);
// Return the parsed value
return value;
} else {
// Return the empty QVariant
return QVariant();
}
}
/**
* clone
*/
QVariant clone(const QVariant &data) {
QVariant v;
if (data.type() == QVariant::Map) {
cloneMap(v, data.toMap());
} else if (data.type() == QVariant::Hash) {
cloneMap(v, data.toHash());
} else if (data.type() == QVariant::List) {
cloneList(v, data.toList());
} else if (data.type() == QVariant::StringList) {
cloneList(v, data.toStringList());
} else {
v = QVariant(data);
}
return v;
}
/**
* insert value (map case)
*/
void insert(QVariant &v, const QString &key, const QVariant &value) {
if (!v.canConvert<QVariantMap>()) v = QVariantMap();
QVariantMap *p = (QVariantMap *)v.data();
p->insert(key, clone(value));
}
/**
* append value (list case)
*/
void append(QVariant &v, const QVariant &value) {
if (!v.canConvert<QVariantList>()) v = QVariantList();
QVariantList *p = (QVariantList *)v.data();
p->append(value);
}
QByteArray serialize(const QVariant &data) {
bool success = true;
return serialize(data, success);
}
QByteArray serialize(const QVariant &data, bool &success, int _level /*= 0*/) {
QByteArray newline;
QByteArray tabs;
QByteArray tabsFields;
if (prettySerialize) {
newline = "\n";
for (uint l=0; l<_level; l++) {
tabs += " ";
}
tabsFields = tabs + " ";
}
QByteArray str;
success = true;
if (!data.isValid()) { // invalid or null?
str = "null";
} else if ((data.type() == QVariant::List) ||
(data.type() == QVariant::StringList)) { // variant is a list?
QList<QByteArray> values;
const QVariantList list = data.toList();
Q_FOREACH(const QVariant& v, list) {
bool otherSuccess = true;
QByteArray serializedValue = serialize(v, otherSuccess, _level+1);
if (serializedValue.isNull()) {
success = false;
break;
}
values << tabsFields + serializedValue;
}
if (!values.isEmpty()) {
str = "[" + newline + join( values, "," + newline ) + newline + tabs + "]";
} else {
str = "[]";
}
} else if (data.type() == QVariant::Hash) { // variant is a hash?
str = serializeMap<>(data.toHash(), success, _level+1);
} else if (data.type() == QVariant::Map) { // variant is a map?
str = serializeMap<>(data.toMap(), success, _level+1);
} else if ((data.type() == QVariant::String) ||
(data.type() == QVariant::ByteArray)) {// a string or a byte array?
str = sanitizeString(data.toString()).toUtf8();
} else if (data.type() == QVariant::Double) { // double?
double value = data.toDouble(&success);
if (success) {
str = QByteArray::number(value, 'g');
if (!str.contains(".") && ! str.contains("e")) {
str += ".0";
}
}
} else if (data.type() == QVariant::Bool) { // boolean value?
str = data.toBool() ? "true" : "false";
} else if (data.type() == QVariant::ULongLong) { // large unsigned number?
str = QByteArray::number(data.value<qulonglong>());
} else if (data.canConvert<qlonglong>()) { // any signed number?
str = QByteArray::number(data.value<qlonglong>());
} else if (data.canConvert<long>()) { //TODO: this code is never executed because all smaller types can be converted to qlonglong
str = QString::number(data.value<long>()).toUtf8();
} else if (data.type() == QVariant::DateTime) { // datetime value?
str = sanitizeString(dateTimeFormat.isEmpty()
? data.toDateTime().toString()
: data.toDateTime().toString(dateTimeFormat)).toUtf8();
} else if (data.type() == QVariant::Date) { // date value?
str = sanitizeString(dateTimeFormat.isEmpty()
? data.toDate().toString()
: data.toDate().toString(dateFormat)).toUtf8();
} else if (data.canConvert<QString>()) { // can value be converted to string?
// this will catch QUrl, ... (all other types which can be converted to string)
str = sanitizeString(data.toString()).toUtf8();
} else {
success = false;
}
if (success) {
return str;
}
return QByteArray();
}
QString serializeStr(const QVariant &data) {
return QString::fromUtf8(serialize(data));
}
QString serializeStr(const QVariant &data, bool &success) {
return QString::fromUtf8(serialize(data, success));
}
/**
* \enum JsonToken
*/
enum JsonToken {
JsonTokenNone = 0,
JsonTokenCurlyOpen = 1,
JsonTokenCurlyClose = 2,
JsonTokenSquaredOpen = 3,
JsonTokenSquaredClose = 4,
JsonTokenColon = 5,
JsonTokenComma = 6,
JsonTokenString = 7,
JsonTokenNumber = 8,
JsonTokenTrue = 9,
JsonTokenFalse = 10,
JsonTokenNull = 11
};
static QString sanitizeString(QString str) {
str.replace(QLatin1String("\\"), QLatin1String("\\\\"));
str.replace(QLatin1String("\""), QLatin1String("\\\""));
str.replace(QLatin1String("\b"), QLatin1String("\\b"));
str.replace(QLatin1String("\f"), QLatin1String("\\f"));
str.replace(QLatin1String("\n"), QLatin1String("\\n"));
str.replace(QLatin1String("\r"), QLatin1String("\\r"));
str.replace(QLatin1String("\t"), QLatin1String("\\t"));
return QString(QLatin1String("\"%1\"")).arg(str);
}
static QByteArray join(const QList<QByteArray> &list, const QByteArray &sep) {
QByteArray res;
Q_FOREACH(const QByteArray &i, list) {
if (!res.isEmpty()) {
res += sep;
}
res += i;
}
return res;
}
/**
* parseValue
*/
static QVariant parseValue(const QString &json, int &index, bool &success) {
// Determine what kind of data we should parse by
// checking out the upcoming token
switch(lookAhead(json, index)) {
case JsonTokenString:
return parseString(json, index, success);
case JsonTokenNumber:
return parseNumber(json, index);
case JsonTokenCurlyOpen:
return parseObject(json, index, success);
case JsonTokenSquaredOpen:
return parseArray(json, index, success);
case JsonTokenTrue:
nextToken(json, index);
return QVariant(true);
case JsonTokenFalse:
nextToken(json, index);
return QVariant(false);
case JsonTokenNull:
nextToken(json, index);
return QVariant();
case JsonTokenNone:
break;
}
// If there were no tokens, flag the failure and return an empty QVariant
success = false;
return QVariant();
}
/**
* parseObject
*/
static QVariant parseObject(const QString &json, int &index, bool &success) {
QVariantMap map;
int token;
// Get rid of the whitespace and increment index
nextToken(json, index);
// Loop through all of the key/value pairs of the object
bool done = false;
while (!done) {
// Get the upcoming token
token = lookAhead(json, index);
if (token == JsonTokenNone) {
success = false;
return QVariantMap();
} else if (token == JsonTokenComma) {
nextToken(json, index);
} else if (token == JsonTokenCurlyClose) {
nextToken(json, index);
return map;
} else {
// Parse the key/value pair's name
QString name = parseString(json, index, success).toString();
if (!success) {
return QVariantMap();
}
// Get the next token
token = nextToken(json, index);
// If the next token is not a colon, flag the failure
// return an empty QVariant
if (token != JsonTokenColon) {
success = false;
return QVariant(QVariantMap());
}
// Parse the key/value pair's value
QVariant value = parseValue(json, index, success);
if (!success) {
return QVariantMap();
}
// Assign the value to the key in the map
map[name] = value;
}
}
// Return the map successfully
return QVariant(map);
}
/**
* parseArray
*/
static QVariant parseArray(const QString &json, int &index, bool &success) {
QVariantList list;
nextToken(json, index);
bool done = false;
while(!done) {
int token = lookAhead(json, index);
if (token == JsonTokenNone) {
success = false;
return QVariantList();
} else if (token == JsonTokenComma) {
nextToken(json, index);
} else if (token == JsonTokenSquaredClose) {
nextToken(json, index);
break;
} else {
QVariant value = parseValue(json, index, success);
if (!success) {
return QVariantList();
}
list.push_back(value);
}
}
return QVariant(list);
}
/**
* parseString
*/
static QVariant parseString(const QString &json, int &index, bool &success) {
QString s;
QChar c;
eatWhitespace(json, index);
c = json[index++];
bool complete = false;
while(!complete) {
if (index == json.size()) {
break;
}
c = json[index++];
if (c == '\"') {
complete = true;
break;
} else if (c == '\\') {
if (index == json.size()) {
break;
}
c = json[index++];
if (c == '\"') {
s.append('\"');
} else if (c == '\\') {
s.append('\\');
} else if (c == '/') {
s.append('/');
} else if (c == 'b') {
s.append('\b');
} else if (c == 'f') {
s.append('\f');
} else if (c == 'n') {
s.append('\n');
} else if (c == 'r') {
s.append('\r');
} else if (c == 't') {
s.append('\t');
} else if (c == 'u') {
int remainingLength = json.size() - index;
if (remainingLength >= 4) {
QString unicodeStr = json.mid(index, 4);
int symbol = unicodeStr.toInt(0, 16);
s.append(QChar(symbol));
index += 4;
} else {
break;
}
}
} else {
s.append(c);
}
}
if (!complete) {
success = false;
return QVariant();
}
return QVariant(s);
}
/**
* parseNumber
*/
static QVariant parseNumber(const QString &json, int &index) {
eatWhitespace(json, index);
int lastIndex = lastIndexOfNumber(json, index);
int charLength = (lastIndex - index) + 1;
QString numberStr;
numberStr = json.mid(index, charLength);
index = lastIndex + 1;
bool ok;
if (numberStr.contains('.')) {
return QVariant(numberStr.toDouble(NULL));
} else if (numberStr.startsWith('-')) {
int i = numberStr.toInt(&ok);
if (!ok) {
qlonglong ll = numberStr.toLongLong(&ok);
return ok ? ll : QVariant(numberStr);
}
return i;
} else {
uint u = numberStr.toUInt(&ok);
if (!ok) {
qulonglong ull = numberStr.toULongLong(&ok);
return ok ? ull : QVariant(numberStr);
}
return u;
}
}
/**
* lastIndexOfNumber
*/
static int lastIndexOfNumber(const QString &json, int index) {
int lastIndex;
for(lastIndex = index; lastIndex < json.size(); lastIndex++) {
if (QString("0123456789+-.eE").indexOf(json[lastIndex]) == -1) {
break;
}
}
return lastIndex -1;
}
/**
* eatWhitespace
*/
static void eatWhitespace(const QString &json, int &index) {
for(; index < json.size(); index++) {
if (QString(" \t\n\r").indexOf(json[index]) == -1) {
break;
}
}
}
/**
* lookAhead
*/
static int lookAhead(const QString &json, int index) {
int saveIndex = index;
return nextToken(json, saveIndex);
}
/**
* nextToken
*/
static int nextToken(const QString &json, int &index) {
eatWhitespace(json, index);
if (index == json.size()) {
return JsonTokenNone;
}
QChar c = json[index];
index++;
switch(c.toLatin1()) {
case '{': return JsonTokenCurlyOpen;
case '}': return JsonTokenCurlyClose;
case '[': return JsonTokenSquaredOpen;
case ']': return JsonTokenSquaredClose;
case ',': return JsonTokenComma;
case '"': return JsonTokenString;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '-': return JsonTokenNumber;
case ':': return JsonTokenColon;
}
index--; // ^ WTF?
int remainingLength = json.size() - index;
// True
if (remainingLength >= 4) {
if (json[index] == 't' && json[index + 1] == 'r' &&
json[index + 2] == 'u' && json[index + 3] == 'e') {
index += 4;
return JsonTokenTrue;
}
}
// False
if (remainingLength >= 5) {
if (json[index] == 'f' && json[index + 1] == 'a' &&
json[index + 2] == 'l' && json[index + 3] == 's' &&
json[index + 4] == 'e') {
index += 5;
return JsonTokenFalse;
}
}
// Null
if (remainingLength >= 4) {
if (json[index] == 'n' && json[index + 1] == 'u' &&
json[index + 2] == 'l' && json[index + 3] == 'l') {
index += 4;
return JsonTokenNull;
}
}
return JsonTokenNone;
}
void setDateTimeFormat(const QString &format) {
dateTimeFormat = format;
}
void setDateFormat(const QString &format) {
dateFormat = format;
}
QString getDateTimeFormat() {
return dateTimeFormat;
}
QString getDateFormat() {
return dateFormat;
}
void setPrettySerialize(bool enabled) {
prettySerialize = enabled;
}
bool isPrettySerialize() {
return prettySerialize;
}
QQueue<BuilderJsonObject *> BuilderJsonObject::created_list;
BuilderJsonObject::BuilderJsonObject() {
// clean objects previous "created"
while (!BuilderJsonObject::created_list.isEmpty()) {
delete BuilderJsonObject::created_list.dequeue();
}
}
BuilderJsonObject::BuilderJsonObject(JsonObject &json) {
BuilderJsonObject();
obj = json;
}
BuilderJsonObject *BuilderJsonObject::set(const QString &key, const QVariant &value) {
obj[key] = value;
return this;
}
BuilderJsonObject *BuilderJsonObject::set(const QString &key, BuilderJsonObject *builder) {
return set(key, builder->create());
}
BuilderJsonObject *BuilderJsonObject::set(const QString &key, BuilderJsonArray *builder) {
return set(key, builder->create());
}
JsonObject BuilderJsonObject::create() {
BuilderJsonObject::created_list.enqueue(this);
return obj;
}
QQueue<BuilderJsonArray *> BuilderJsonArray::created_list;
BuilderJsonArray::BuilderJsonArray() {
// clean objects previous "created"
while (!BuilderJsonArray::created_list.isEmpty()) {
delete BuilderJsonArray::created_list.dequeue();
}
}
BuilderJsonArray::BuilderJsonArray(JsonArray &json) {
BuilderJsonArray();
array = json;
}
BuilderJsonArray *BuilderJsonArray::add(const QVariant &element) {
array.append(element);
return this;
}
BuilderJsonArray *BuilderJsonArray::add(BuilderJsonObject *builder) {
return add(builder->create());
}
BuilderJsonArray *BuilderJsonArray::add(BuilderJsonArray *builder) {
return add(builder->create());
}
JsonArray BuilderJsonArray::create() {
BuilderJsonArray::created_list.enqueue(this);
return array;
}
BuilderJsonObject *objectBuilder() {
return new BuilderJsonObject();
}
BuilderJsonObject *objectBuilder(JsonObject &json) {
return new BuilderJsonObject(json);
}
BuilderJsonArray *arrayBuilder() {
return new BuilderJsonArray();
}
BuilderJsonArray *arrayBuilder(JsonArray &json) {
return new BuilderJsonArray(json);
}
} //end namespace