/// <summary>
/// Executes the the specified token on the specified scope
/// </summary>
/// <param name="token"></param>
/// <param name="scope"></param>
public static void ExecuteInScope(Token token, Scope scope)
{
// create properties
ConFileObject currentObj;
switch (token.Kind)
{
case TokenType.ObjectStart:
case TokenType.ActiveSwitch:
// Fetch our object
if (token.Kind == TokenType.ActiveSwitch)
{
// Fetch the object and Set as the active object
currentObj = scope.GetObject(token);
scope.SetActiveObject(currentObj);
}
else
{
// Get our method
var Method = token.TokenArgs.ReferenceType.GetMethod(
token.TokenArgs.PropertyName
);
// Fetch our new working object.
currentObj = Method.Invoke(token);
scope.AddObject(currentObj, token);
}
// Add file entry?
if (token.File != null)
{
// see if the object exists in file
if (token.File.Entries.Contains(currentObj))
token.File.AddEntry(currentObj, token);
}
break;
case TokenType.ObjectProperty:
// Get the last used object
ReferenceType type = token.TokenArgs.ReferenceType;
currentObj = scope.GetActiveObject(type);
// Make sure we have an object to work with and the object
// reference matches our current working object
if (currentObj == null)
{
// If we are here, we have an issue...
string error = $"Failed to set property \"{token.TokenArgs.ReferenceType.Name}.\""
+ $"{token.TokenArgs.PropertyName}. No object reference set!";
Logger.Error(error, token.File, token.Position);
throw new ParseException(error, token);
}
// Let the object parse its own lines...
try
{
currentObj.Parse(token);
}
catch (Exception e)
{
Logger.Error(e.Message, token.File, token.Position, e);
throw;
}
break;
case TokenType.RemComment:
case TokenType.BeginRem:
case TokenType.IfStart:
case TokenType.Run:
case TokenType.Include:
break;
case TokenType.Constant:
case TokenType.Variable:
Expression exp = new Expression(token);
scope.Expressions[exp.Name] = exp;
break;
case TokenType.None:
// Throw error if the line is not empty
if (!String.IsNullOrWhiteSpace(token.Value))
{
string message = $"Unable to parse file entry \"{token.Value}\" on line {token.Position}";
Logger.Error(message, token.File, token.Position);
throw new ParseException(message, token);
}
break;
}
}
/// <summary>
/// Parses the contents of a .con or .ai file, and converts the contents into C# objects
/// </summary>
/// <param name="fileContents">A dictionary of file contents [LineNumber => LineContents]</param>
/// <param name="workingFile">A reference to the ConFile that contains the contents</param>
internal static async Task ParseFileLines(
Dictionary<int, string> fileContents,
ConFile workingFile,
ExecuteInstruction run)
{
// ============
// First we convert our confile lines into parsed tokens
// ============
Token[] fileTokens = Tokenizer.Tokenize(workingFile, ref fileContents);
TokenArgs tokenArgs;
Scope currentScope = workingFile.Scope;
// ============
// Now we create an object reference of all objects in the Confile
// before parsing the object properties, which **can** reference an object
// in the same file before its defined
// NOTE: Do not create object references for .Active and .safeActive
// ============
foreach (Token token in fileTokens.Where(x => x.Kind == TokenType.ObjectStart).OrderBy(x => x.Position))
{
// Create the object
var Method = token.TokenArgs.ReferenceType.GetMethod(token.TokenArgs.PropertyName);
ConFileObject template = Method.Invoke(token);
// Finally, register the object with the ObjectManager
currentScope.AddObject(template, token);
Logger.Info($"Created {token.TokenArgs.ReferenceType} \"{template.Name}\"", workingFile, token.Position);
}
// ============
// Finally, we load all of the object properties, and assign them to their
// respective objects
// ============
// Create our needed objects
RemComment comment = null;
ConFileObject currentObj = null;
ReferenceType type;
var builder = new StringBuilder();
// We use a for loop here so we can skip rem blocks and statements
for (int i = 0; i < fileTokens.Length; i++)
{
// Grab token value
Token token = fileTokens[i];
try
{
switch (token.Kind)
{
case TokenType.ObjectStart:
case TokenType.ActiveSwitch:
// NOTE: the object was created before this loop!
currentObj = currentScope.GetObject(token);
currentScope.SetActiveObject(currentObj);
// === Objects are already added to the working file before hand === //
// Add object reference to file
workingFile.AddEntry(currentObj, token);
// Reset comment
comment = null;
// Log
Logger.Info($"Loading object properties for \"{currentObj.Name}\"",
workingFile, token.Position
);
break;
case TokenType.ObjectProperty:
// Convert args to an object
tokenArgs = token.TokenArgs;
// Get the last used object
type = tokenArgs.ReferenceType;
currentObj = currentScope.GetActiveObject(type);
// Make sure we have an object to work with and the object
// reference matches our current working object
if (currentObj == null)
{
// If we are here, we have an issue...
string error = $"Failed to set property \"{token.TokenArgs.ReferenceType.Name}.\""
+ $"{token.TokenArgs.PropertyName}. No object reference set!";
throw new ParseException(error, token);
}
// Let the object parse its own lines...
try
{
currentObj.Parse(token);
// Ensure comment is null
comment = null;
}
catch (Exception e)
{
Logger.Error(e.Message, workingFile, token.Position, e);
throw;
}
break;
case TokenType.RemComment:
// Create a new comment if we need to
if (comment == null)
{
comment = new RemComment(token);
}
// Add comment to the current string
comment.AppendLine(token.Value);
break;
case TokenType.BeginRem:
RemComment rem = new RemComment(token);
rem.IsRemBlock = true;
// Skip every line until we get to the endRem
builder.AppendLine(token.Value);
i = ScopeUntil(TokenType.EndRem, fileTokens, i, builder);
// Set rem value
rem.Value = builder.ToString().TrimEnd();
workingFile.AddEntry(rem, rem.Token);
// Clear the string builder
builder.Clear();
break;
case TokenType.IfStart:
Statement statement = new Statement(token);
if (token.Kind == TokenType.IfStart)
{
// Skip every line until we get to the endIf
builder.AppendLine(token.Value);
i = ScopeUntil(TokenType.EndIf, fileTokens, i, builder);
// Clear the string builder
statement.Token.Value = builder.ToString().TrimEnd();
builder.Clear();
}
// Add entry
workingFile.AddEntry(statement, statement.Token);
break;
case TokenType.Run:
case TokenType.Include:
// Just add to as a string
RunStatement stmt = new RunStatement(token);
workingFile.AddEntry(stmt, stmt.Token);
// Do we execute the statement?
if (run == ExecuteInstruction.Skip)
continue;
// Create new scope for execution
Scope runScope = currentScope;
// Are we executing in a new scope?
if (run == ExecuteInstruction.ExecuteInNewScope)
{
// For now, we just inherit the parent scope type
runScope = new Scope(currentScope, currentScope.ScopeType);
runScope.MissingObjectHandling = MissingObjectHandling.CheckParent;
}
// Get the filepath
string filePath = Path.GetDirectoryName(workingFile.FilePath);
string fileName = Path.Combine(filePath, stmt.FileName);
// Define file arguments
runScope.SetArguments(stmt.Arguments);
// Load the file
try
{
ConFile include = await LoadFileAsync(fileName, runScope, run);
workingFile.ExecutedIncludes.Add(include);
}
catch (FileNotFoundException) // Only acceptable exception
{
fileName = Path.GetFileName(fileName);
Logger.Warning($"Failed to run file \"{fileName}\". File Not Found",
workingFile, token.Position);
}
break;
case TokenType.Constant:
case TokenType.Variable:
// Set the new expression reference in Scope
Expression exp = new Expression(token);
currentScope.Expressions[exp.Name] = exp;
// Add expression to the confile as well
workingFile.AddEntry(exp, exp.Token);
break;
case TokenType.None:
// Dont attach comment to a property if we have an empty line here
if (comment != null)
{
workingFile.AddEntry(comment, comment.Token);
comment = null;
}
// Throw error if the line is not empty
if (!String.IsNullOrWhiteSpace(token.Value))
{
string message = $"Unable to parse file entry \"{token.Value}\" on line {token.Position}";
throw new ParseException(message, token);
}
break;
}
}
catch (Exception e)
{
Logger.Error(e.Message, token.File, token.Position, e);
throw;
}
}
// Finalize this confile
workingFile.Finish();
}