Include another file in json files

[pooyan-dadvand]

There are several cases that we need (or it would be better) to include another json file in our project parameters and materials.

[pooyan-dadvand]

@KratosMultiphysics/technical-committee we arrived to the conclusion to use define keywords of inclusion:

• @include_json
• @include_csv
• @include_grf

or similar ones for other formats.

The implementation should be done in a new Jsonfstream which substitutes the included files and give back the complete string to the actual Parameters class.

[AriadnaCortesDanes]

The implementation could be done in different ways

• As a list of elements "@include_json" : ["file_name1.json", file_name2.json"]
• Unique element "@include_json" : "file_name.json"

This case is more simple but does not allow to include more than one json file (due to "duplicate key")

[pooyan-dadvand]

I would go for the unique one until we find a use case for the list. @KratosMultiphysics/technical-committee and @KratosMultiphysics/implementation-committee what you think?

[rubenzorrilla]

I would go for the unique one until we find a use case for the list. @KratosMultiphysics/technical-committee and @KratosMultiphysics/implementation-committee what you think?

Agree. Besides, taking into account how we write information in our GUIs, I've the feeling that we'll never need concatenating a list of json files.

[roigcarlo]

Closing, this is implemented in #10004