public override SolidityFunction CreateDecisionFunction()
{
//Define function's header
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName} memory", true);
//Add declaration of helper varaibles
function.AddToBody(new SolidityStatement($"{OutputStructName} memory output", true));
function.AddToBody(new SolidityStatement($"bool matchedRule = false", true));
//For each row representing rule create condition for if statement
var rules = GetAllConditions();
foreach (var rule in rules.Select((value, i) => new { i, value }))
{
var noMatchCheck = GetMatchOrNotBody(rule.i);
string conditionBody = noMatchCheck;
conditionBody += "matchedRule = true;";
function.AddToBody(AddBodyBasedOnRule(rule.value, conditionBody));
}
//Add the rest of the function
var undefinedOutputCheck = new SolidityIfElse();
undefinedOutputCheck.AddConditionBlock("!matchedRule", new SolidityStatement("revert('Undefined output')", true));
function.AddToBody(undefinedOutputCheck);
function.AddToBody(new SolidityStatement("return output", true));
return(function);
}
public override IList <SolidityComponent> GetElementCode(List <ElementConverter> nextElements, IList <SequenceFlow> outgoingSeqFlows, IList <SolidityStruct> dataModel = null)
{
var logicFunction = new SolidityFunction(gateway.Id + "Logic", SolidityVisibility.Internal);
var body = CreateParallelism(nextElements);
if (gateway.Incoming.Count == 1)
{
logicFunction.AddToBody(body);
return(new List <SolidityComponent> {
logicFunction
});
}
else
{
var incomingFlowsVar = new SolidityStatement("int " + incVaribaleName + " = 0");
var ifElseBlock = new SolidityIfElse();
string ifElseCondition = incVaribaleName + "==" + gateway.Incoming.Count.ToString();
body.Add(incVaribaleName + " = 0");
ifElseBlock.AddConditionBlock(ifElseCondition, body);
logicFunction.AddToBody(ifElseBlock);
return(new List <SolidityComponent> {
incomingFlowsVar, logicFunction
});
}
}
SolidityModifier CreateAddressGuard()
{
//Initialize the modifier using the generated name
SolidityModifier addressGuard = new SolidityModifier(ConversionTemplates.AddressGuardModifierName(GetElementCallName()));
addressGuard.AddParameters(processConverter.GetIdentifiersAsParameters());
//Address is force assigned
if (userTaskElement.Assignee.Address != null)
{
SolidityStatement requireStatement = new SolidityStatement($"require(msg.sender=={GetAssigneeAddress()})");
addressGuard.AddToBody(requireStatement);
}
//Address is not force assigned, it will be assigned to the first caller of the first task method containing this assignee
else if (userTaskElement.Assignee.Name != null)
{
var addressPosition = $"{ConverterConfig.ADDRESS_MAPPING_VAR_NAME}[\"{userTaskElement.Assignee.Name}\"]";
var ifElseBlock = new SolidityIfElse();
//Assigns the address, if address has not been been yet assigned to the assignee
ifElseBlock.AddConditionBlock($"{addressPosition} == address(0x0)", new SolidityStatement($"{addressPosition} = msg.sender"));
//Checks whether the sender has the required address
SolidityStatement requireStatement = new SolidityStatement($"require(msg.sender=={addressPosition})");
addressGuard.AddToBody(ifElseBlock);
addressGuard.AddToBody(requireStatement);
}
return(addressGuard);
}
private string GetPriorityComparisonBody()
{
var priorityComparison = new SolidityIfElse();
string ifCondition = string.Empty;
//Make function of cycles comparing priorities
foreach (var outputVarable in Decision.DecisionTable.Outputs.Select((value, i) => new { i, value }))
{
ifCondition += $"priorities[i].{outputVarable.value.Name} == currentOutput.{outputVarable.value.Name}";
if (outputVarable.i + 1 < Decision.DecisionTable.Outputs.Count)
{
ifCondition += " && ";
}
}
priorityComparison.AddConditionBlock(ifCondition, new SolidityStatement("return currentOutput", true));
string elseCondition = string.Empty;
foreach (var outputVarable in Decision.DecisionTable.Outputs.Select((value, i) => new { i, value }))
{
elseCondition += $"priorities[i].{outputVarable.value.Name} == newOutput.{outputVarable.value.Name}";
if (outputVarable.i + 1 < Decision.DecisionTable.Outputs.Count)
{
elseCondition += " && ";
}
}
priorityComparison.AddConditionBlock(elseCondition, new SolidityStatement("return newOutput", true));
return(priorityComparison.ToString());
}
public override SolidityFunction CreateDecisionFunction()
{
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName} memory", true);
//Add declaration of helper varaibles
var prioritiesFormatted = GetPriorities(Decision);
var noUniqueOutputs = Regex.Matches(prioritiesFormatted, $"{OutputStructName}").Count;
function.AddToBody(new SolidityStatement($"{OutputStructName}[{noUniqueOutputs}] memory priorities = {prioritiesFormatted}", true));
function.AddToBody(new SolidityStatement($"{OutputStructName} memory output", true));
function.AddToBody(new SolidityStatement($"bool matchedRule = false", true));
var rules = GetAllConditions();
foreach (var rule in rules.Skip(PriorityOffset).Select((value, i) => new { i, value }))
{
string priorityCheck = GetPriorityCheckBody(rule.i + PriorityOffset);
function.AddToBody(AddBodyBasedOnRule(rule.value, priorityCheck));
}
//Add the rest of the function
var undefinedOutputCheck = new SolidityIfElse();
undefinedOutputCheck.AddConditionBlock("!matchedRule", new SolidityStatement("revert('Undefined output')", true));
function.AddToBody(undefinedOutputCheck);
function.AddToBody(new SolidityStatement("return output", true));
return(function);
}
//Returns output for section representing situation if there is the match or not
private string GetMatchOrNotBody(int ruleIndex)
{
//Assign maximum/minimum if this is the first met condition
var noMatchCheck = new SolidityIfElse();
string noMatchCheckBody = string.Empty;
foreach (var outputEntry in Decision.DecisionTable.Rules[ruleIndex].OutputEntries.Select((value, i) => new { i, value }))
{
var dataType = Decision.DecisionTable.Outputs[outputEntry.i].TypeRef;
var convertedValue = ConvertToSolidityValue(outputEntry.value.Text, dataType);
noMatchCheckBody += $"output.{Decision.DecisionTable.Outputs[outputEntry.i].Name.Replace(".", "__")} = {convertedValue};";
if (outputEntry.i + 1 < Decision.DecisionTable.Rules[ruleIndex].OutputEntries.Count())
{
noMatchCheckBody += "\n";
}
}
noMatchCheck.AddConditionBlock("!matchedRule", new SolidityStatement(noMatchCheckBody, false));
//Assign maximum/minimum if the values are greater/lesser
string matchCheckBody = string.Empty;
foreach (var outputEntry in Decision.DecisionTable.Rules[ruleIndex].OutputEntries.Select((value, i) => new { i, value }))
{
var outputsCheck = new SolidityIfElse();
var dataType = Decision.DecisionTable.Outputs[outputEntry.i].TypeRef;
var convertedValue = ConvertToSolidityValue(outputEntry.value.Text, dataType);
string outputsCheckCondition = $"output.{Decision.DecisionTable.Outputs[outputEntry.i].Name} {Sign} {convertedValue}";
string outputsCheckBody = $"output.{Decision.DecisionTable.Outputs[outputEntry.i].Name.Replace(".", "__")} = {convertedValue};";
outputsCheck.AddConditionBlock(outputsCheckCondition, new SolidityStatement(outputsCheckBody, false));
matchCheckBody += outputsCheck.ToString();
}
noMatchCheck.AddConditionBlock(string.Empty, new SolidityStatement(matchCheckBody, false));
return(noMatchCheck.ToString());
}
SolidityFunction CreateMainFunction()
{
var logicFunction = new SolidityFunction($"{GetElementCallName()}", SolidityVisibility.Internal);
var body = CreateCallsToOutgoing();
logicFunction.AddParameters(processConverter.GetIdentifiersAsParameters());
if (gatewayElement.Incoming.Count == 1)
{
logicFunction.AddToBody(body);
}
else
{
//Increment the incoming variable
logicFunction.AddToBody(new SolidityStatement($"{incrementVariableName} += 1"));
var ifElseBlock = new SolidityIfElse();
string ifElseCondition = $"{incrementVariableName}=={gatewayElement.Incoming.Count}";
//reset the incoming flow count
body.Add(incrementVariableName + " = 0");
ifElseBlock.AddConditionBlock(ifElseCondition, body);
logicFunction.AddToBody(ifElseBlock);
}
return(logicFunction);
}
public override SolidityFunction CreateDecisionFunction()
{
//Define function's header
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName} memory", true);
//Add declaration of helper varaibles
function.AddToBody(new SolidityStatement($"{OutputStructName} memory output", true));
function.AddToBody(new SolidityStatement($"bool matchedRule = false", true));
//For each row representing rule create condition for if statement
var rules = GetAllConditions();
foreach (var rule in rules.Select((value, i) => new { i, value }))
{
//Add to sum if the conditions are met
string conditionBody = string.Empty;
foreach (var outputEntry in Decision.DecisionTable.Rules[rule.i].OutputEntries.Select((value, i) => new { i, value }))
{
conditionBody += $"output.{Decision.DecisionTable.Outputs[outputEntry.i].Name.Replace(".", "__")} += {outputEntry.value.Text};\n";
}
conditionBody += "matchedRule = true;";
//If the row is empty then do not put the logic into conditional statement
function.AddToBody(AddBodyBasedOnRule(rule.value, conditionBody));
}
//Add the rest of the function
var undefinedOutputCheck = new SolidityIfElse();
undefinedOutputCheck.AddConditionBlock("!matchedRule", new SolidityStatement("revert('Undefined output')", true));
function.AddToBody(undefinedOutputCheck);
function.AddToBody(new SolidityStatement("return output", true));
return(function);
}
public override SolidityFunction CreateDecisionFunction()
{
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName} memory", true);
//Add declaration of helper varaibles
function.AddToBody(new SolidityStatement($"{OutputStructName} memory output", true));
function.AddToBody(new SolidityStatement($"bool matchedRule = false", true));
//Add checks of conditions for matches and their bodies
var rules = GetAllConditions();
foreach (var rule in rules.Select((value, i) => new { i, value }))
{
var conditionCheck = GetConditionCheck(rule.i);
function.AddToBody(AddBodyBasedOnRule(rule.value, conditionCheck.ToString()));
}
//Add the rest of the function
var undefinedOutputCheck = new SolidityIfElse();
undefinedOutputCheck.AddConditionBlock("!matchedRule", new SolidityStatement("revert('Undefined output')", true));
function.AddToBody(undefinedOutputCheck);
function.AddToBody(new SolidityStatement("return output", true));
return(function);
}
SolidityIfElse CreateIfElseBlock(IList <SequenceFlow> outgoingSequenceFlows)
{
var ifElseBlock = new SolidityIfElse();
foreach (var sequenceFlow in outgoingSequenceFlows)
{
var targetConverter = processConverter.GetConverterOfElement(sequenceFlow.TargetId);
ifElseBlock.AddConditionBlock(sequenceFlow.Condition, targetConverter.GetStatementForPrevious(gatewayElement));
}
return(ifElseBlock);
}
private SolidityIfElse GetConditionCheck(int ruleIndex)
{
var conditionCheck = new SolidityIfElse();
//Assign output if there is already the match
string matchBody = GetMatchBody(ruleIndex);
conditionCheck.AddConditionBlock("!matchedRule", new SolidityStatement(matchBody, false));
//Assign output if there is no match yet
conditionCheck.AddConditionBlock("", new SolidityStatement("revert('Undefined output')", true));
return(conditionCheck);
}
public void OneConditionTest()
{
SolidityIfElse ifelse = new SolidityIfElse();
ifelse.AddConditionBlock("a == 2", new SolidityStatement("a = 0"));
string expected = "if(a == 2){\n" +
"\ta = 0;\n" +
"}\n";
Assert.Equal(expected, ifelse.ToString());
}
//Returns output for section representing situation if there is the match or not
private string GetPriorityCheckBody(int ruleIndex)
{
var priorityCheck = new SolidityIfElse();
//Assign output if there is already match
string matchBody = GetMatchBody(ruleIndex);
priorityCheck.AddConditionBlock("!matchedRule", new SolidityStatement(matchBody, false));
//Assign output if there is no match yet
string noMatchBody = GetNoMatchBody(ruleIndex);
priorityCheck.AddConditionBlock("", new SolidityStatement(noMatchBody, true));
return(priorityCheck.ToString());
}
SolidityFunction CreateTouchFunction(TaskConverter attachedToConverter)
{
var function = new SolidityFunction($"touch{GetElementCallName()}", SolidityVisibility.Public, "bool");
function.AddParameters(processConverter.GetIdentifiersAsParameters());
function.AddModifier($"{ConversionTemplates.StateGuardModifierName(attachedToConverter.GetElementCallName())}({processConverter.GetIdentifierNames()})");
var solidityCondition = new SolidityIfElse();
solidityCondition.AddConditionBlock($"now > {GetTimerCondition()}", CreateTouchFunctionLogic(attachedToConverter));
function.AddToBody(solidityCondition);
function.AddToBody(new SolidityStatement("return true"));
return(function);
}
//Adds either if-else statement or a general statement
protected SolidityComponent AddBodyBasedOnRule(string ruleValue, string body)
{
//If the row is empty then do not put the logic into conditional statement
if (string.IsNullOrEmpty(ruleValue))
{
return(new SolidityStatement(body, false));
}
else
{
var condition = new SolidityIfElse();
condition.AddConditionBlock(ruleValue, new SolidityStatement(body, false));
return(condition);
}
}
SolidityIfElse CreateIfElseBlock(List <ElementConverter> nextElements, IList <SequenceFlow> outgoingSeqFlows)
{
var ifElseBlock = new SolidityIfElse();
foreach (var seqFlow in outgoingSeqFlows)
{
foreach (var nextElement in nextElements)
{
if (seqFlow.TargetId == nextElement.GetElementId())
{
ifElseBlock.AddConditionBlock(seqFlow.Condition, nextElement.GetStatementForPrevious(gateway));
}
}
}
return(ifElseBlock);
}
SolidityModifier CreateAddressGuard()
{
SolidityModifier addressGuard = new SolidityModifier("is" + GetTaskName() + "Authorized");
if (userTask.Assignee.Address != null)
{
SolidityStatement requireStatement = new SolidityStatement("require(msg.sender==" + GetAssigneeAddress() + ")");
addressGuard.AddToBody(requireStatement);
}
else if (userTask.Assignee.Name != null)
{
var addressPosition = Helpers.ADDRESS_MAPPING_VAR_NAME + "[\"" + userTask.Assignee.Name + "\"]";
var ifElseBlock = new SolidityIfElse();
ifElseBlock.AddConditionBlock(addressPosition + " == address(0x0)", new SolidityStatement(addressPosition + " = msg.sender"));
SolidityStatement requireStatement = new SolidityStatement("require(msg.sender==" + addressPosition + ")");
addressGuard.AddToBody(ifElseBlock);
addressGuard.AddToBody(requireStatement);
}
return(addressGuard);
}
//Returns string representation of section checking existence of matched output in the priority list
private string GetPirorityListCheck(int ruleIndex)
{
var priorityListCheck = new SolidityIfElse();
string priorityListCheckBody = "existsInOutput[i] = true;\n" +
"outputSize++;\n" +
"matchedRule = true;\n" +
"break;";
string priorityListCheckCond = "!existsInOutput[i]";
foreach (var outputEntry in Decision.DecisionTable.Rules[ruleIndex].OutputEntries.Select((value, i) => new { i, value }))
{
var comparisonVar = $"priorities[i].{Decision.DecisionTable.Outputs[outputEntry.i].Name}";
var comparisonType = Decision.DecisionTable.Outputs[outputEntry.i].TypeRef;
var comparisonEntry = outputEntry.value.Text;
var comparison = ConvertExpressionToCondition(comparisonVar, comparisonType, comparisonEntry, true);
priorityListCheckCond += $" && {comparison}";
}
priorityListCheck.AddConditionBlock(priorityListCheckCond, new SolidityStatement(priorityListCheckBody, false));
return(priorityListCheck.ToString());
}
//Retruns for loop component initializing the output
private SolidityFor GetInitializationForLoop(int noUniqueOutputs)
{
var initForLoop = new SolidityFor("i", $"{noUniqueOutputs}");
//Add only outputs that meet the conditions
var initCheck = new SolidityIfElse();
string initCheckBody = $"output[j] = {OutputStructName}(";
foreach (var output in Decision.DecisionTable.Outputs.Select((value, i) => new { i, value }))
{
initCheckBody += $"priorities[i].{output.value.Name}";
if (output.i + 1 < Decision.DecisionTable.Outputs.Count)
{
initCheckBody += ", ";
}
}
initCheckBody += ");\n";
initCheckBody += "j++;";
initCheck.AddConditionBlock("existsInOutput[i]", new SolidityStatement(initCheckBody, false));
initForLoop.AddToBody(new SolidityStatement(initCheck.ToString(), false));
return(initForLoop);
}
SolidityFunction CreateProcessReturnFunction()
{
var function = new SolidityFunction(ConversionTemplates.CallActivityReturnFunctionName(GetElementCallName()), SolidityVisibility.Internal);
function.AddParameters(processConverter.GetIdentifiersAsParameters());
var nextElementStatement = CreateNextElementStatement();
var incrementStatement = new SolidityStatement($"{ConversionTemplates.CallActivityCounter(GetElementCallName())}++");
var checkConditionBlock = new SolidityIfElse();
var calledStartEventConverter = processConverter.ContractConverter.GetStartEventConverter(callActivity);
var callSubprocessStatement = calledStartEventConverter.GetStatementForPrevious(callActivity);
checkConditionBlock.AddConditionBlock($"{ConversionTemplates.CallActivityCounter(GetElementCallName())} >= {GetCountTarget(callActivity)}",
nextElementStatement);
switch (callActivity.InstanceType)
{
case InstanceType.Single:
function.AddToBody(nextElementStatement);
break;
case InstanceType.Sequential:
//increment the counter, check if counter reached limit.
//If counter reached limit, then call the next element. If not, call the subprocess again.
function.AddToBody(incrementStatement);
checkConditionBlock.AddConditionBlock("", callSubprocessStatement);
function.AddToBody(checkConditionBlock);
break;
case InstanceType.Parallel:
//increment the counter, check if counter reached limit.
//If counter reached limit, then call the next element. If not, do nothing.
function.AddToBody(incrementStatement);
function.AddToBody(checkConditionBlock);
break;
}
return(function);
}
public override SolidityFunction CreateDecisionFunction()
{
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName} memory", true);
//Add declaration of helper varaibles
function.AddToBody(new SolidityStatement($"{OutputStructName} memory output", true));
var emptyRule = false;
//Add checks of conditions for matches and their bodies
var rules = GetAllConditions();
foreach (var rule in rules.Select((value, i) => new { i, value }))
{
//Assign output if there is already the match
string conditionBody = GetConditionBody(rule.i);
//If the row is empty then do not put the logic into conditional statement
if (string.IsNullOrEmpty(rule.value))
{
var condition = new SolidityStatement(conditionBody, false);
function.AddToBody(condition);
emptyRule = true;
break;
}
else
{
var condition = new SolidityIfElse();
condition.AddConditionBlock(rule.value, new SolidityStatement(conditionBody, false));
function.AddToBody(condition);
}
}
//Add the rest of the function
if (!emptyRule)
{
function.AddToBody(new SolidityStatement("revert('Undefined output')", true));
}
return(function);
}
public override SolidityFunction CreateDecisionFunction()
{
//Define function's header
FunctionName = Regex.Replace(Decision.Id, @" ", "").ToLowerCamelCase();
SolidityFunction function = new SolidityFunction(FunctionName, SolidityVisibility.Internal, $"{OutputStructName}[] memory", true);
//Add declaration of helper varaibles
var prioritiesFormatted = GetPriorities();
var noUniqueOutputs = Regex.Matches(prioritiesFormatted, $"{OutputStructName}").Count;
function.AddToBody(new SolidityStatement($"{OutputStructName}[{noUniqueOutputs}] memory priorities = {prioritiesFormatted}", true));
function.AddToBody(new SolidityStatement($"bool[{noUniqueOutputs}] memory existsInOutput", true));
function.AddToBody(new SolidityStatement($"uint outputSize = 0", true));
function.AddToBody(new SolidityStatement($"bool matchedRule = false", true));
var rules = GetAllConditions();
foreach (var rule in rules.Skip(PriorityOffset).Select((value, i) => new { i, value }))
{
string priorityListCheck = GetPirorityListCheck(rule.i + PriorityOffset);
var priorityCheckLoop = new SolidityFor("i", $"{noUniqueOutputs}");
priorityCheckLoop.AddToBody(new SolidityStatement(priorityListCheck, false));
function.AddToBody(AddBodyBasedOnRule(rule.value, priorityCheckLoop.ToString()));
}
//Initialization of output list
function.AddToBody(new SolidityStatement("uint j = 0", true));
function.AddToBody(new SolidityStatement($"{OutputStructName}[] memory output = new {OutputStructName}[](outputSize)", true));
var initForLoop = GetInitializationForLoop(noUniqueOutputs);
function.AddToBody(initForLoop);
//Add the rest of the function
var undefinedOutputCheck = new SolidityIfElse();
undefinedOutputCheck.AddConditionBlock("!matchedRule", new SolidityStatement("revert('Undefined output')", true));
function.AddToBody(undefinedOutputCheck);
function.AddToBody(new SolidityStatement("return output", true));
return(function);
}
List <SolidityComponent> CreateCallNextBody()
{
var components = new List <SolidityComponent>();
var callNextStatement = GetChangeActiveStateStatement(false);
callNextStatement.Add(processConverter.GetStatementOfNextElement(userTaskElement));
if (userTaskElement.InstanceType != InstanceType.Single)
{
//The tasks will run until it gets interrupted by some boundary event
if (userTaskElement.LoopCardinality == -1 || (userTaskElement.LoopCardinality == 0 && userTaskElement.LoopCollection == null))
{
return(components);
}
var ifStatement = new SolidityIfElse();
var counterVariableName = ConversionTemplates.MultiInstanceCounterVariable(GetElementCallName());
components.Add(new SolidityStatement($"{counterVariableName}++"));
counterVariablePresent = true;
if (userTaskElement.LoopCardinality > 0)
{
ifStatement.AddConditionBlock($"{counterVariableName} >= {userTaskElement.LoopCardinality}", callNextStatement);
}
else if (userTaskElement.LoopCollection != null)
{
ifStatement.AddConditionBlock($"{counterVariableName} >= {GetCountTarget(userTaskElement)}", callNextStatement);
}
components.Add(ifStatement);
}
else
{
components.Add(callNextStatement);
}
return(components);
}
