Conditional stitching to specific datasources

[kbrandwijk]

I have been thinking about scenarios to use stitching on the GrAMPS-level, and the only use case I can come up with is when I want to stitch to another datasource. However, to keep datasources as independent as possible, I would like to add the feature to:

• Specify which datasource I want to stitch to (based on its unique namespace)
• Only apply that stitching if the datasource is part of my collection of datasources

To achieve this, I propose adding a key to the stitching object like this:

context: 'myDatasource',
model: ...,
schema: ...,
resolvers: ...,
stitching: {
  xckd: {
    typeDefs: ...,
    resolvers: ...
  },
  myOtherDatasource: {
    typeDefs: ...,
    resolvers: ...
  }
}

So if I setup my GrAMPS like this:

const gramps = gramps({ datasources: [myDatacource, xckd] })

That only the stitching on myDatasource to xckd is applied, and not to myOtherDatasource, because those types, and that data, is not available.