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#include <node.h>
#include <Python.h>
#include "py_object_wrapper.h"
#include "utils.h"
#include "datetime.h"
#include "time.h"
Persistent<FunctionTemplate> PyObjectWrapper::py_function_template;
void PyObjectWrapper::Initialize() {
HandleScope scope;
PyDateTime_IMPORT;
Local<FunctionTemplate> fn_tpl = FunctionTemplate::New();
Local<ObjectTemplate> proto = fn_tpl->PrototypeTemplate();
Local<ObjectTemplate> obj_tpl = fn_tpl->InstanceTemplate();
obj_tpl->SetInternalFieldCount(1);
// this has first priority. see if the properties already exist on the python object
obj_tpl->SetNamedPropertyHandler(Get, Set);
// If we're calling `toString`, delegate to our version of ToString
proto->SetAccessor(String::NewSymbol("toString"), ToStringAccessor);
// likewise for valueOf
obj_tpl->SetAccessor(String::NewSymbol("valueOf"), ValueOfAccessor);
// Python objects can be called as functions.
obj_tpl->SetCallAsFunctionHandler(Call, Handle<Value>());
py_function_template = Persistent<FunctionTemplate>::New(fn_tpl);
}
Handle<Value> PyObjectWrapper::New(PyObject* obj) {
HandleScope scope;
Local<Value> jsObj;
try {
jsObj = ConvertToJavaScript(obj);
} catch (int e) {
if (PyErr_Occurred()) {
return ThrowPythonException();
}
}
if (PyErr_Occurred()) {
return ThrowPythonException();
}
return scope.Close(jsObj);
}
Handle<Value> PyObjectWrapper::Get(Local<String> key, const AccessorInfo& info) {
HandleScope scope;
PyObjectWrapper* wrapper = ObjectWrap::Unwrap<PyObjectWrapper>(info.Holder());
String::Utf8Value utf8_key(key);
string value(*utf8_key);
PyObject* result = wrapper->InstanceGet(value);
if(result) {
return scope.Close(PyObjectWrapper::New(result));
}
return Handle<Value>();
}
Handle<Value> PyObjectWrapper::Set(Local<String> key, Local<Value> value, const AccessorInfo& info) {
// we don't know what to do.
return Undefined();
}
Handle<Value> PyObjectWrapper::CallAccessor(Local<String> property, const AccessorInfo& info) {
HandleScope scope;
Local<FunctionTemplate> func = FunctionTemplate::New(Call);
return scope.Close(func->GetFunction());
}
Handle<Value> PyObjectWrapper::ToStringAccessor(Local<String> property, const AccessorInfo& info) {
HandleScope scope;
Local<FunctionTemplate> func = FunctionTemplate::New(ToString);
return scope.Close(func->GetFunction());
}
Handle<Value> PyObjectWrapper::ValueOfAccessor(Local<String> property, const AccessorInfo& info) {
HandleScope scope;
Local<FunctionTemplate> func = FunctionTemplate::New(ValueOf);
return scope.Close(func->GetFunction());
}
Handle<Value> PyObjectWrapper::Call(const Arguments& args) {
HandleScope scope;
PyObjectWrapper* pyobjwrap = ObjectWrap::Unwrap<PyObjectWrapper>(args.This());
Handle<Value> result = pyobjwrap->InstanceCall(args);
return scope.Close(result);
}
Handle<Value> PyObjectWrapper::ToString(const Arguments& args) {
HandleScope scope;
PyObjectWrapper* pyobjwrap = ObjectWrap::Unwrap<PyObjectWrapper>(args.This());
Local<String> result = String::New(pyobjwrap->InstanceToString(args).c_str());
return scope.Close(result);
}
Handle<Value> PyObjectWrapper::ValueOf(const Arguments& args) {
HandleScope scope;
PyObjectWrapper* pyobjwrap = ObjectWrap::Unwrap<PyObjectWrapper>(args.This());
PyObject* py_obj = pyobjwrap->InstanceGetPyObject();
if(PyCallable_Check(py_obj)) {
Local<FunctionTemplate> call = FunctionTemplate::New(Call);
return scope.Close(call->GetFunction());
} else if (PyNumber_Check(py_obj)) {
long long_result = PyLong_AsLong(py_obj);
return scope.Close(Integer::New(long_result));
} else if (PySequence_Check(py_obj)) {
int len = PySequence_Length(py_obj);
Local<Array> array = Array::New(len);
for(int i = 0; i < len; ++i) {
Handle<Object> jsobj = PyObjectWrapper::py_function_template->GetFunction()->NewInstance();
PyObject* py_obj_out = PySequence_GetItem(py_obj, i);
PyObjectWrapper* obj_out = new PyObjectWrapper(py_obj_out);
obj_out->Wrap(jsobj);
array->Set(i, jsobj);
}
return scope.Close(array);
} else if (PyMapping_Check(py_obj)) {
int len = PyMapping_Length(py_obj);
Local<Object> object = Object::New();
PyObject* keys = PyMapping_Keys(py_obj);
PyObject* values = PyMapping_Values(py_obj);
for(int i = 0; i < len; ++i) {
PyObject *key = PySequence_GetItem(keys, i);
PyObject *value = PySequence_GetItem(values, i);
Local<Object> jsobj = PyObjectWrapper::py_function_template->GetFunction()->NewInstance();
PyObjectWrapper* obj_out = new PyObjectWrapper(value);
obj_out->Wrap(jsobj);
}
Py_XDECREF(keys);
Py_XDECREF(values);
return scope.Close(object);
}
return Undefined();
}
Local<Value> PyObjectWrapper::ConvertToJavaScript(PyObject* obj) {
Local<Value> jsVal;
// undefined
if(obj == Py_None) {
jsVal = Local<Value>::New(Undefined());
}
// integer (can be 64b)
else if(PyInt_CheckExact(obj)) {
long i = PyInt_AsLong(obj);
jsVal = Local<Value>::New(Number::New((double) i));
}
// double
else if(PyFloat_CheckExact(obj)) {
double d = PyFloat_AsDouble(obj);
jsVal = Local<Value>::New(Number::New(d));
}
// long
else if(PyLong_CheckExact(obj)) {
double d = PyLong_AsDouble(obj);
jsVal = Local<Value>::New(Number::New(d));
}
// string
else if(PyString_CheckExact(obj)) {
jsVal = Local<Value>::New(String::New(PyString_AsString(obj)));
}
// bool
else if(PyBool_Check(obj)) {
int b = PyObject_IsTrue(obj);
jsVal = Local<Value>::New(Boolean::New(b));
}
// date
else if (PyDate_Check(obj)) {
time_t rawtime = 0;
struct tm * timeinfo = { 0 };
timeinfo = gmtime ( &rawtime );
int year = PyDateTime_GET_YEAR(obj);
int month = PyDateTime_GET_MONTH(obj);
int day = PyDateTime_GET_DAY(obj);
if ((day == 28) && (month == 2) && (year % 4 == 0) && (year % 100 == 0 && year % 400 != 0)) {
timeinfo->tm_mday = 29;
}
timeinfo->tm_year = year - 1900;
timeinfo->tm_mon = month - 1;
timeinfo->tm_mday = day;
int microseconds = 0;
if ( PyDateTime_Check(obj) ) {
PyObject *utcoffset = PyObject_CallMethod(obj, "utcoffset", NULL);
if(utcoffset != Py_None){
obj = PyNumber_Subtract(obj, utcoffset);
}
timeinfo->tm_hour = PyDateTime_DATE_GET_HOUR(obj);
timeinfo->tm_min = PyDateTime_DATE_GET_MINUTE(obj);
timeinfo->tm_sec = PyDateTime_DATE_GET_SECOND(obj);
timeinfo->tm_isdst = -1;
microseconds = PyDateTime_DATE_GET_MICROSECOND(obj);
} else if (PyTime_Check(obj) ) {
timeinfo->tm_hour = PyDateTime_TIME_GET_HOUR(obj);
timeinfo->tm_min = PyDateTime_TIME_GET_MINUTE(obj);
timeinfo->tm_sec = PyDateTime_TIME_GET_SECOND(obj);
timeinfo->tm_isdst = -1;
microseconds = PyDateTime_TIME_GET_MICROSECOND(obj);
} else {
timeinfo->tm_hour = 0;
timeinfo->tm_min = 0;
timeinfo->tm_sec = 0;
timeinfo->tm_isdst = -1;
}
time_t result = mktime(timeinfo) * 1000 + microseconds;
jsVal = v8::Date::New(result);
}
// dict
else if(PyDict_CheckExact(obj)) {
Local<Object> dict = v8::Object::New();
PyObject *key, *value;
Py_ssize_t pos = 0;
while (PyDict_Next(obj, &pos, &key, &value)) {
Handle<Value> jsKey = ConvertToJavaScript(key);
Handle<Value> jsValue = ConvertToJavaScript(value);
dict->Set(jsKey, jsValue);
}
jsVal = dict;
}
// list
else if(PyList_CheckExact(obj)) {
int size = PyList_Size(obj);
Local<Array> array = v8::Array::New(size);
PyObject* value;
for(int i = 0; i < size; i++ ){
value = PyList_GetItem(obj, i);
array->Set(i, ConvertToJavaScript(value));
}
jsVal = array;
} else {
Py_XINCREF(obj);
Local<Object> jsObj = py_function_template->GetFunction()->NewInstance();
PyObjectWrapper* wrapper = new PyObjectWrapper(obj);
wrapper->Wrap(jsObj);
jsVal = Local<Value>::New(jsObj);
}
return jsVal;
}
PyObject* PyObjectWrapper::ConvertToPython(const Handle<Value>& value) {
int len;
if (value->IsString()) {
return PyString_FromString(*String::Utf8Value(value->ToString()));
} else if (value->IsBoolean()) {
if (value->ToBoolean()->IsTrue()) {
return Py_True;
} else {
return Py_False;
}
} else if (value->IsNull() || value->IsUndefined()) {
return Py_None;
} else if (value->IsNumber()) {
return PyFloat_FromDouble(value->NumberValue());
} else if (value->IsDate()) {
Handle<Date> dt = Handle<Date>::Cast(value);
long sinceEpoch = dt->NumberValue();
long milliseconds = (sinceEpoch / 1000);
time_t timestamp = (time_t)(milliseconds);
struct tm* tmp = localtime(×tamp);
return PyDateTime_FromDateAndTime(
tmp->tm_year + 1900,
tmp->tm_mon + 1,
tmp->tm_mday,
tmp->tm_hour,
tmp->tm_min,
tmp->tm_sec,
sinceEpoch % 1000
);
} else if (value->IsObject()) {
if (value->IsArray()) {
Local<Array> array = Array::Cast(*value);
len = array->Length();
PyObject* py_list = PyList_New(len);
for (int i = 0; i < len; ++i) {
Local<Value> js_val = array->Get(i);
PyList_SET_ITEM(py_list, i, ConvertToPython(js_val));
}
return py_list;
} else {
Local<Object> obj = value->ToObject();
if(!obj->FindInstanceInPrototypeChain(PyObjectWrapper::py_function_template).IsEmpty()) {
PyObjectWrapper* python_object = ObjectWrap::Unwrap<PyObjectWrapper>(value->ToObject());
PyObject* pyobj = python_object->InstanceGetPyObject();
return pyobj;
} else {
Local<Array> property_names = obj->GetPropertyNames();
len = property_names->Length();
PyObject* py_dict = PyDict_New();
for (int i = 0; i < len; ++i) {
Local<String> str = property_names->Get(i)->ToString();
Local<Value> js_val = obj->Get(str);
PyDict_SetItemString(py_dict, *String::Utf8Value(str), ConvertToPython(js_val));
}
return py_dict;
}
}
return NULL;
} else if (value->IsArray()) {
Local<Array> array = Array::Cast(*value);
len = array->Length();
PyObject* py_list = PyList_New(len);
for (int i = 0; i < len; ++i) {
Local<Value> js_val = array->Get(i);
PyList_SET_ITEM(py_list, i, ConvertToPython(js_val));
}
return py_list;
} else if (value->IsUndefined()) {
Py_RETURN_NONE;
}
return NULL;
}
Handle<Value> PyObjectWrapper::InstanceCall(const Arguments& args) {
// for now, we don't do anything.
HandleScope scope;
int len = args.Length();
PyObject* args_tuple = PyTuple_New(len);
for (int i = 0; i < len; ++i) {
PyTuple_SET_ITEM(args_tuple, i, ConvertToPython(args[i]));
}
PyObject* result = PyObject_CallObject(mPyObject, args_tuple);
//Py_XDECREF(args_tuple);
if (PyErr_Occurred()) {
return ThrowPythonException();
}
if (result) {
Handle<Value> val = PyObjectWrapper::New(result);
Py_XDECREF(result);
return scope.Close(val);
} else {
return ThrowPythonException();
}
}
string PyObjectWrapper::InstanceToString(const Arguments& args) {
PyObject* as_string = PyObject_Str(mPyObject);
return PyString_AsString(as_string);
}
PyObject* PyObjectWrapper::InstanceGet(const string& key) {
if(PyObject_HasAttrString(mPyObject, key.c_str())) {
return PyObject_GetAttrString(mPyObject, key.c_str());
}
return (PyObject*)NULL;
}