private JsObject EvaluateModuleInternal(string script, IBaristaModuleLoader moduleLoader = null)
{
var mainModule = m_moduleRecordFactory.CreateBaristaModuleRecord(this, "", null, true, moduleLoader);
//Set the global value - this is akin to node.js's 'global' variable (https://nodejs.org/api/globals.html#globals_global)
//It's preferable for barista not to use this, however, right now I don't see a way to actually 'Set' values dynamically in a module namespace
Object.DefineProperty(GlobalObject, "global", new JsPropertyDescriptor()
{
Configurable = false, Enumerable = false, Writable = false, Value = GlobalObject
});
//Now start the parsing.
try
{
//First, parse our main module script.
mainModule.ParseModuleSource(script);
//Now we're ready, evaluate the main module.
Engine.JsModuleEvaluation(mainModule.Handle);
//Evaluate any pending promises.
CurrentScope.ResolvePendingPromises();
//Retrieve the module namespace.
var moduleNamespace = Engine.JsGetModuleNamespace(mainModule.Handle);
//Return the module namespace as an object.
return(new JsObject(Engine, this, moduleNamespace));
}
finally
{
mainModule.Dispose();
}
}
private string EvaluateModuleInternal(string script, IBaristaModuleLoader moduleLoader = null)
{
var subModuleId = Guid.NewGuid();
var subModuleName = subModuleId.ToString();
//Define a shim script that will set a global to the result of the script run as a module.
//This is because JsModuleEvaluation always returns undefined, and there is no other way
//To obtain access to variables defined in the module's namespace.
//If there is a promise task queue defined, have the script auto-resolve any promises.
string mainModuleScript;
if (m_promiseTaskQueue == null)
{
mainModuleScript = $@"
import child from '{subModuleName}';
global.$EXPORTS = child;
";
}
else
{
mainModuleScript = $@"
import child from '{subModuleName}';
(async () => await child)().then((result) => {{ global.$EXPORTS = result; }}, (reject) => {{ global.$ERROR = reject }});
";
}
var mainModule = m_moduleRecordFactory.CreateBaristaModuleRecord(this, "", null, true, moduleLoader);
var subModule = m_moduleRecordFactory.CreateBaristaModuleRecord(this, subModuleName, mainModule, false, moduleLoader);
//Set the global value.
Object.DefineProperty(GlobalObject, "global", new JsPropertyDescriptor()
{
Configurable = false, Enumerable = false, Writable = false, Value = GlobalObject
});
//Now start the parsing.
try
{
//First, parse our main module script.
mainModule.ParseModuleSource(mainModuleScript);
//Now Parse the user-provided script.
subModule.ParseModuleSource(script);
//Now we're ready, evaluate the main module.
Engine.JsModuleEvaluation(mainModule.Handle);
//Evaluate any pending promises.
CurrentScope.ResolvePendingPromises();
if (m_promiseTaskQueue != null && GlobalObject.HasOwnProperty("$ERROR"))
{
var errorValue = GlobalObject.GetProperty("$ERROR");
throw new JsScriptException(JsErrorCode.ScriptException, errorValue.Handle);
}
//Return the name of the global.
return("$EXPORTS");
}
finally
{
mainModule.Dispose();
}
}
