Variables in ShellSwitch command attributes

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Would be great if Pimatic variables could be used in ShellSwitch attributes onCommand, offCommand and getStateCommand. Example:

{
      "id": "mySwitch",
      "name": "mySwitch",
      "class": "ShellSwitch",
      "onCommand": "myOnCommand $myVariable",
      "offCommand": "myOfCommand $myVariable",
      "getStateCommand": "mygetCommand $myVariable",
      "interval": 5000
   }

For onCommand and offCommand we can realize the same behaviour with two rules, but there is not other solution for getStateCommand. Would be more comfortable if no rules needed and could be realized as in the example.

@developer Is this difficult to implement? Would be very helpfull to reduce the amount of rules.

{
      "id": "mySwitch",
      "name": "mySwitch",
      "class": "ShellSwitch",
      "onCommand": "myOnCommand ${myVariable}",
      "offCommand": "myOffCommand ${myVariable}",
      "getStateCommand": "mygetCommand ${myVariable}",
      "interval": 5000
   }`

@Heizelmann said:

Is this difficult to implement?

No. The problem is, however, the shell command syntax collides with expression syntax used in pimatic.

I am still interested in a solution. Maybe new ideas or a workaround by scripting? I am not an expert in this.