1 files changed, 57 insertions, 0 deletions
diff --git a/core/src/Model/Workflow/Evaluation.hpp b/core/src/Model/Workflow/Evaluation.hpp
new file mode 100644
index 0000000..be2e862
--- /dev/null
+++ b/core/src/Model/Workflow/Evaluation.hpp
@@ -0,0 +1,57 @@
+#pragma once
+
+#include "Model/Workflow/Workflow.hpp"
+
+#include <cstddef>
+#include <cstdint>
+#include <string>
+#include <vector>
+
+class WorkflowEvaluationError {
+public:
+	enum MessageType : int16_t {
+		Error,
+		Warning,
+	};
+
+	enum PinType : int16_t {
+		NoPin,
+		InputPin,
+		OutputPin,
+	};
+
+public:
+	std::string Message;
+	size_t NodeId;
+	int PinId;
+	PinType PinType;
+	MessageType Type;
+};
+
+class WorkflowEvaluationContext {
+private:
+	struct RuntimeNode;
+	struct RuntimeConnection;
+
+	Workflow* mWorkflow;
+	std::vector<RuntimeNode> mRuntimeNodes;
+	std::vector<RuntimeConnection> mRuntimeConnections;
+	std::vector<WorkflowEvaluationError> mErrors;
+	std::vector<WorkflowEvaluationError> mWarnings;
+
+public:
+	WorkflowEvaluationContext(Workflow& workflow);
+
+	BaseValue* GetConnectionValue(size_t id, bool constant);
+	BaseValue* GetConnectionValue(const WorkflowNode::InputPin& inputPin);
+	void SetConnectionValue(size_t id, std::unique_ptr<BaseValue> value);
+	void SetConnectionValue(const WorkflowNode::OutputPin& outputPin, std::unique_ptr<BaseValue> value);
+
+	void ReportError(std::string message, const WorkflowNode& node, int pinId, bool inputPin);
+	void ReportError(std::string message, const WorkflowNode& node);
+	void ReportWarning(std::string message, const WorkflowNode& node, int pinId, bool inputPin);
+	void ReportWarning(std::string message, const WorkflowNode& node);
+
+	/// Run until all possible paths have been evaluated.
+	void Run();
+};