public FunctionList Parse()
{
var logger = loggerFactory.CreateLogger <FunctionList>();
var functionsList = new FunctionList();
if (string.IsNullOrEmpty(operations) == false)
{
logger.LogInformation("raw operations presented {operations}", operations);
var ops = operations
.ToLowerInvariant()
.Split(';', StringSplitOptions.RemoveEmptyEntries);
var produceThumbnail = false;
foreach (var op in ops)
{
logger.LogInformation("trying op '{op}'", op);
var matched = false;
foreach (var builder in builders)
{
logger.LogInformation(" matching against {0}", builder.Key);
var regex = new Regex(builder.Key);
var match = regex.Match(op);
if (match.Success && "thumb".Equals(op))
{
produceThumbnail = true;
matched = true;
break;
}
else if (match.Success)
{
var func = builder.Value(match);
logger.LogInformation("adding operation '{0}' to list", op);
functionsList.Add(func);
matched = true;
break;
}
}
if (matched == false)
{
logger.LogInformation("invalid operation '{op}'", op);
throw new InvalidOperationException(string.Format("Operation '{0}' is not a valid transform", op));
}
}
if (produceThumbnail == true)
{
var func = builders["thumb"](null);
logger.LogInformation("adding final thumbnail operation to list");
functionsList.Add(func);
}
}
logger.LogInformation("all transforms parsed, there are {0}", functionsList.NumberOfOperations);
return(functionsList);
}
public FunctionProcessor(FunctionList functionsList, ILoggerFactory loggerFactory)
{
this.functionsList = functionsList.Functions;
this.loggerFactory = loggerFactory;
}