/// <summary>
/// Gets the content of aggregate keys
/// </summary>
/// <param name="script"></param>
/// <param name="keyBuffName"></param>
/// <returns></returns>
private string GetAggregateKeyExtraction(DonutScript script, string keyBuffName)
{
var rootIgn = script.GetRootIntegration();
var ignKeys = rootIgn.AggregateKeys;
if (ignKeys == null || !ignKeys.Any())
{
throw new Exception("Integration has no aggregate keys!");
}
var keys = ignKeys.Where(x => x.Operation != null);
// if (keys == null || !keys.Any())
// {
// throw new Exception("Integration has no evaluable aggregate keys!");
// }
var buffer = new StringBuilder();
int iKey = 0;
buffer.AppendLine($"var {keyBuffName} = new Dictionary<string, object>();");
foreach (var key in keys)
{
var keyName = $"aggKey{iKey}";
var evalFnName = $"{keyName}_fn";
var evalFn = key.Operation.GetCallCode(evalFnName).ToString();
//var keyVar = $"var {keyName} = {evalFnName}(document[\"{key.Arguments}\"]);";
var keyLine = $"{keyBuffName}[\"{key.Name}\"] = {evalFnName}(document[\"{key.Arguments}\"]);";
buffer.AppendLine(evalFn);
buffer.AppendLine(keyLine);
iKey++;
}
buffer.AppendLine($"var groupKey = Context.AddMetaGroup({keyBuffName});");
return(buffer.ToString());
}
/// <summary>
/// Generates a donutfile
/// </summary>
/// <param name="namespace"></param>
/// <param name="script"></param>
/// <returns></returns>
public string GenerateDonut(string @namespace, DonutScript script)
{
string donutTemplate;
var baseName = script.Type.GetClassName();
var conutextName = script.Type.GetContextName();
_expVisitor.Clear();
_expVisitor.SetScript(script);
var encoding = System.Text.Encoding.UTF8;
using (StreamReader reader = new StreamReader(GetTemplate("Donutfile.txt"), encoding))
{
donutTemplate = reader.ReadToEnd();
if (string.IsNullOrEmpty(donutTemplate))
{
throw new Exception("Template empty!");
}
var donutComment = $"//Generated on {DateTime.UtcNow} UTC\n";
donutComment += $"//Root collection on {script.GetRootIntegration().Collection}\n";
donutTemplate = $"{donutComment}\n" + donutTemplate;
donutTemplate = donutTemplate.Replace("$Namespace", @namespace);
donutTemplate = donutTemplate.Replace("$ClassName", baseName);
donutTemplate = donutTemplate.Replace("$ContextTypeName", conutextName);
var prepareScript = GeneratePrepareExtractionContent(script);
donutTemplate = donutTemplate.Replace("$PrepareExtraction", prepareScript);
donutTemplate = ProcessFeaturePrepContent(donutTemplate, script); //donutTemplate.Replace("$ExtractionBody", GetFeaturePrepContent(donutTemplate, script));
donutTemplate = donutTemplate.Replace("$CompleteExtraction", GetFeatureExtractionCompletion(script));
var propertiesContent = GenerateDonutPropertiesContent(!string.IsNullOrEmpty(prepareScript));
donutTemplate = donutTemplate.Replace("$DonutProperties", propertiesContent);
donutTemplate = donutTemplate.Replace("$OnFinished", GenerateOnDounutFinishedContent(script));
donutTemplate += "\n\n" +
"/* Donut script: \n" + script.ToString() +
"\n*/";
//Items: $ClassName, $ContextTypeName, $ExtractionBody, $OnFinished
}
return(donutTemplate);
}