result_t doDefine(v8::Local<v8::Object> &mod)
{
v8::Local<v8::Array> defs;
{
v8::Local<v8::Value> v;
v8::Local<v8::String> strDefs = v8::String::NewFromUtf8(isolate, "defs");
// get define array from default module
v = mod->GetHiddenValue(strDefs);
mod->DeleteHiddenValue(strDefs);
if (!v.IsEmpty() && v->IsArray())
defs = v8::Local<v8::Array>::Cast(v);
else
return 0;
}
int an = defs->Length(), i, j;
std::vector<v8::Local<v8::Object> > mods;
std::vector<std::string> modIds;
std::set<std::string> depns;
// cache string
v8::Local<v8::String> strRequire = v8::String::NewFromUtf8(isolate, "require");
v8::Local<v8::String> strExports = v8::String::NewFromUtf8(isolate, "exports");
v8::Local<v8::String> strDeps = v8::String::NewFromUtf8(isolate, "deps");
v8::Local<v8::String> strFactory = v8::String::NewFromUtf8(isolate, "factory");
v8::Local<v8::String> strId = v8::String::NewFromUtf8(isolate, "id");
// copy data to local
mods.resize(an);
modIds.resize(an);
for (i = 0; i < an; i++)
{
mods[i] = defs->Get(i)->ToObject();
modIds[i] = *v8::String::Utf8Value(mods[i]->Get(strId));
depns.insert(modIds[i]);
}
// two step
int doStep = 2;
bool bNext = false;
while (doStep)
{
bNext = true;
for (i = 0; i < an; i++)
{
if (!modIds[i].empty())
{
// get deps array
v8::Local<v8::Value> a1 = mods[i]->GetHiddenValue(strDeps);
if (a1.IsEmpty() || !a1->IsArray())
{
// not found deps array
depns.erase(modIds[i]);
modIds[i].clear();
bNext = false;
continue;
}
v8::Local<v8::Array> a = v8::Local<v8::Array>::Cast(a1);
int n = a->Length();
// check if the module depend a module defined in same script
for (j = 0; j < n; j++)
if (doStep == 2
&& depns.find(*v8::String::Utf8Value(a->Get(j)))
!= depns.end())
break;
if (j == n)
{
std::vector<v8::Local<v8::Value> > deps;
deps.resize(n);
for (j = 0; j < n; j++)
{
v8::String::Utf8Value id(a->Get(j));
if (!qstrcmp(*id, "require"))
deps[j] = mods[i]->Get(strRequire);
else if (!qstrcmp(*id, "exports"))
deps[j] = mods[i]->Get(strExports);
else if (!qstrcmp(*id, "module"))
deps[j] = mods[i];
else
{
// load module use require
result_t hr = global_base::require(*id, deps[j]);
if (hr < 0)
return hr;
}
}
v8::Local<v8::Value> v;
// get factory and remove hidden value.
v = mods[i]->GetHiddenValue(strFactory);
mods[i]->DeleteHiddenValue(strFactory);
mods[i]->DeleteHiddenValue(strDeps);
if (v->IsFunction())
{
v8::Local<v8::Function> func =
v8::Local<v8::Function>::Cast(v);
v = func->Call(func, n, deps.data());
if (v.IsEmpty())
return CALL_E_JAVASCRIPT;
}
// use the result as exports if the factory return something
if (!IsEmpty(v))
mods[i]->Set(strExports, v);
else
v = mods[i]->Get(strExports);
InstallModule(modIds[i], v);
// remove id name, we don't like to call it again
depns.erase(modIds[i]);
modIds[i].clear();
bNext = false;
}
}
}
if (bNext)
doStep--;
}
return 0;
}
bool V8HiddenValue::deleteHiddenValue(v8::Isolate* isolate, v8::Local<v8::Object> object, v8::Local<v8::String> key)
{
return object->DeleteHiddenValue(key);
}