[Business Approvals Kit - Feature]: Ability to set node message using PowerFX

[Grant-Archibald-MS]

Is your feature request related to a problem? Please describe.

Provide the ability to set the message of a node using a Power FX Expression

Describe the solution you'd like

The following changes will would be required:

• Need a new message in the Dataverse tables for node definition, node runtime and node instance
• Designer new message for each node (Start with static text first)
• Cloud flow query message to include in Approval

Extend the static text to:

• Post a message as json with the ID of the node instance
• Use the plugin to query the node variables and add the variables using Update Variable
• Evaluate the Message using a Dataverse Plugin to evaluate the expression
• Pass in the node instance id, query the parameters then call RecalcEngine of PowerFx and return the message

Power Fx is a C# Plugin with PowerFx.Interpreter var powerFxConfig = new PowerFxConfig(Features.PowerFxV1); _engine = new RecalcEngine(powerFxConfig); _engine.UpdateVariable(key, value.ToString()); var newValue = _engine.Eval(text.Substring(1));

https://github.com/Grant-Archibald-MS/PowerAutomate-TestEngineModule/blob/main/src/testengine.module.powerautomate/ValueContainerConvertor.cs

Describe alternatives you've considered

No response

Additional context?

No response

AB#3240

[Grant-Archibald-MS]

Discussion with @Ramakrishnan24689 is there is a Power FX PCF control to edit the Power FX formula