Validating input from Plaster parameters

[erikgraa]

Hi!

I have scoured over the documentation and cannot find any reference of being able to leverage e.g. ValidatePattern in parameters.

For instance, when one has a text parameter, it could be useful to have the user re-try inputting a value until it satisfies some regular expression.

Example showing how it could work with an optional pattern attribute.

<parameter name='ModuleName' type='text' prompt='Enter the name of the module' pattern='^[\w\s]+$' />
<parameter name='Version' type='text' prompt='Enter the version of the module' pattern='^\d\.\d$' />

I might have missed something, or is this functionality at present unimplemented?

[erikgraa]

See #430 for a suggestion on how this can be accomplished.