/// <summary>
/// Nominal implementation to retrieve a module.
/// </summary>
/// <param name="moduleName"></param>
/// <param name="modulePriority"></param>
/// <param name="moduleLoader"></param>
/// <returns></returns>
private Task <IBaristaModule> InitializeAndReturnModule(string moduleName, int modulePriority, IBaristaModuleLoader moduleLoader)
{
return(moduleLoader.GetModule(moduleName));
}
private bool FetchImportedModule(JavaScriptModuleRecord jsReferencingModuleRecord, JavaScriptValueSafeHandle specifier, out IntPtr dependentModule)
{
var moduleName = Context.CreateValue(specifier).ToString();
var referencingModuleRecord = m_moduleRecordFactory.GetBaristaModuleRecord(jsReferencingModuleRecord);
//If the current module name is equal to the fetching module name, return this value.
if (Name == moduleName || referencingModuleRecord != null && referencingModuleRecord.Name == moduleName)
{
//Top-level self-referencing module. Reference itself.
dependentModule = jsReferencingModuleRecord.DangerousGetHandle();
return(false);
}
else if (m_importedModules.ContainsKey(moduleName))
{
//The module has already been imported, return the existing JavaScriptModuleRecord
dependentModule = m_importedModules[moduleName].Handle.DangerousGetHandle();
return(false);
}
else if (m_moduleLoader != null)
{
Task <IBaristaModule> moduleLoaderTask = null;
try
{
moduleLoaderTask = m_moduleLoader.GetModule(moduleName);
}
catch (Exception ex)
{
var error = Context.CreateError($"An error occurred while attempting to load a module named {moduleName}: {ex.Message}");
Engine.JsSetException(error.Handle);
dependentModule = jsReferencingModuleRecord.DangerousGetHandle();
return(true);
}
if (moduleLoaderTask != null)
{
IBaristaModule module;
try
{
module = moduleLoaderTask.GetAwaiter().GetResult();
}
catch (Exception ex)
{
var error = Context.CreateError($"An error occurred while attempting to load a module named {moduleName}: {ex.Message}");
Engine.JsSetException(error.Handle);
dependentModule = jsReferencingModuleRecord.DangerousGetHandle();
return(true);
}
if (module != null)
{
var newModuleRecord = m_moduleRecordFactory.CreateBaristaModuleRecord(Context, specifier, this, false);
m_importedModules.Add(moduleName, newModuleRecord);
dependentModule = newModuleRecord.Handle.DangerousGetHandle();
switch (module)
{
//For the built-in Script Module type, parse the string returned by ExportDefault and install it as a module.
case IBaristaScriptModule scriptModule:
var script = scriptModule.ExportDefault(Context, newModuleRecord) as JsString;
if (script == null)
{
var error = Context.CreateError($"The module {moduleName} implements IBaristaScriptModule and is expected to return a string based module that exports a default value.");
Engine.JsSetException(error.Handle);
return(true);
}
newModuleRecord.ParseModuleSource(script.ToString());
return(false);
//Otherwise, install the module.
default:
var result = InstallModule(newModuleRecord, referencingModuleRecord, module, specifier);
return(result);
}
}
}
}
dependentModule = jsReferencingModuleRecord.DangerousGetHandle();
return(true);
}