/// <summary>
/// Compile and register dyncode app api controller (for new or updated app api).
/// </summary>
/// <param name="values"></param>
/// <returns></returns>
public async ValueTask <bool> PrepareController(RouteValueDictionary values)
{
var wrapLog = Log.Call <bool>();
var apiFile = (string)values["apiFile"];
var dllName = (string)values["dllName"];
// If we have a key (that controller is compiled and registered, but not updated) controller was prepared before, so just return values.
// Alternatively remove older version of AppApi controller (if we got updated flag from file system watcher).
if (_compiledAppApiControllers.TryGetValue(apiFile, out var updated))
{
Log.Add($"_compiledAppApiControllers have value: {updated} for: {apiFile}.");
if (updated)
{
RemoveController(dllName, apiFile);
}
else
{
return(wrapLog(
$"ok, nothing to do, AppApi Controller is already compiled and added to ApplicationPart: {apiFile}.",
true));
}
}
Log.Add($"We need to prepare controller for: {apiFile}.");
// Check for AppApi file
if (!File.Exists(apiFile))
{
return(wrapLog($"Error, missing AppApi file {apiFile}.", false));
}
// note: this may look like something you could optimize/cache the result, but that's a bad idea
// because when the file changes, the type-object will be different, so please don't optimize :)
// Check for AppApi source code
var apiCode = await File.ReadAllTextAsync(apiFile);
if (string.IsNullOrWhiteSpace(apiCode))
{
return(wrapLog($"Error, missing AppApi code in file {apiFile}.", false));
}
// Build new AppApi Controller
Log.Add($"Compile assembly: {apiFile}, {dllName}");
var assembly = new Compiler().Compile(apiFile, dllName);
// Add new key to concurrent dictionary, before registering new AppAPi controller.
if (!_compiledAppApiControllers.TryAdd(apiFile, false))
{
return(wrapLog($"Error, while adding key {apiFile} to concurrent dictionary, so will not register AppApi Controller to avoid duplicate controller routes.", false));
}
// Register new AppApi Controller.
AddController(dllName, assembly);
return(wrapLog($"ok, Controller is compiled and added to ApplicationParts: {apiFile}.", true));
}
