ParamConstraint.h

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#pragma once
#include "DataType.h"
#include <string>
#include <vector>
 
namespace Hazelnp
{
    struct ParamConstraint
    {
    public:
        //! Empty constructor
        ParamConstraint() = default;
 
        //! Constructs a require constraint.  
        //! Think of the default value like of a list ofparameters. Like {"--width", "800"}
        static ParamConstraint Require(const std::vector<std::string>& defaultValue = {}, bool required = true)
        {
            ParamConstraint pc;
            pc.defaultValue = defaultValue;
            pc.required = required;
 
            return pc;
        }
 
        //! Constructs a type-safety constraint
        static ParamConstraint TypeSafety(DATA_TYPE requiredType, bool constrainType = true)
        {
            ParamConstraint pc;
            pc.constrainType = constrainType;
            pc.requiredType = requiredType;
 
            return pc;
        }
 
        //! Whole constructor
        ParamConstraint(bool constrainType, DATA_TYPE requiredType, const std::vector<std::string>& defaultValue, bool required)
            :
            constrainType{ constrainType },
            requiredType{ requiredType },
            defaultValue{ defaultValue },
            required{ required }
        {
            return;
        }
 
        //! Should this parameter be forced to be of a certain type?  
        //! Remember to set `constrainTo` to the wanted type
        bool constrainType = false;
 
        //! Constrain the parameter to this value. Requires `constrainType` to be set to true.
        DATA_TYPE requiredType = DATA_TYPE::VOID;
 
        //! The default value for this parameter.  
        //! Gets applied if this parameter was not given.  
        //! Think of this like a list of parameters. Like {"--width", "800"}
        std::vector<std::string> defaultValue;
 
        //! If set to true, and no default value set,
        //! an error will be produced if this parameter is not supplied by the user.
        bool required = false;
 
    private:
        //! The parameter this constraint is for.
        //! This value is automatically set by Hazelnupp.
        std::string key;
 
        friend class Hazelnupp;
    };
}