/// <summary>
/// Initializes a new command class
/// </summary>
/// <param name="commandManager"></param>
/// <param name="classSymbol"></param>
/// <param name="attributeSyntax"></param>
/// <param name="verb"></param>
private CommandClass(
CommandManagerClass commandManager,
INamedTypeSymbol classSymbol,
AttributeSyntax attributeSyntax,
string? verb = null)
{
CommandManager = commandManager ?? throw new ArgumentNullException(nameof(commandManager));
ClassSymbol = classSymbol ?? throw new ArgumentNullException(nameof(classSymbol));
AttributeSyntax = attributeSyntax ?? throw new ArgumentNullException(nameof(attributeSyntax));
Verb = verb;
}
/// <summary>
/// Attempts to create a new <see cref="CommandClass" />.
/// </summary>
/// <param name="commandManager"></param>
/// <param name="classSymbol"></param>
/// <param name="attributeSyntax"></param>
/// <param name="verb"></param>
/// <returns></returns>
public static Result<CommandClass, Diagnostic> Create(
CommandManagerClass commandManager,
INamedTypeSymbol classSymbol,
AttributeSyntax attributeSyntax,
string? verb = null)
{
if (verb is not null && string.IsNullOrWhiteSpace(verb))
{
return Result.Err<CommandClass, Diagnostic>(Diagnostic.Create(
DiagnosticDescriptors.InvalidVerbPassedToCommandManagerAttribute,
attributeSyntax.GetLocation()));
}
return Result.Ok<CommandClass, Diagnostic>(new CommandClass(
commandManager,
classSymbol,
attributeSyntax,
verb));
}
public void Execute(GeneratorExecutionContext context)
{
var commonSymbols = new CommonSymbols(context.Compilation);
var commandManagetAttributeCode = SourceText.From(CodeConstants.CommandManagerAttribute.Code, Encoding.UTF8);
context.AddSource(CodeConstants.CommandManagerAttribute.CodeFileName, commandManagetAttributeCode);
if (context.SyntaxReceiver is SyntaxReceiver receiver)
{
foreach (var commandManagerDeclaration in receiver.CommandManagerClasses)
{
var commandManagerClass = CommandManagerClass.Initialize(
context.Compilation,
context.Compilation.GetSemanticModel(commandManagerDeclaration.SyntaxTree),
commandManagerDeclaration,
commonSymbols,
context.CancellationToken);
if (commandManagerClass.IsErr)
{
context.ReportDiagnostic(commandManagerClass.Err.Value);
}
else
{
var code = commandManagerClass.Ok.Value.GenerateCommandManager();
if (code.IsErr)
{
context.ReportDiagnostic(code.Err.Value);
}
else
{
var managerName = commandManagerDeclaration.Identifier.ValueText;
context.AddSource($"{managerName}.GeneratedCommandManager.cs", SourceText.From(code.Ok.Value, Encoding.UTF8));
}
}
}
}
}
