How would we add a different selection strategy?

[camallen]

Say i wanted to use priority (in order) subject selection, how would this implementation be best achieved in the current API?

The use case is transcription workflow e.g. a book page number stored stored in the priority field of a subject) instead of random selection. There has been a many requests / discussions about supporting a transcriber starting at page 1 and progressing through the pages as they are sequentially wired.

[marten]

Essentially it'd mean a conditional on this line: https://github.com/zooniverse/designator/blob/master/lib/designator/subject_stream.ex#L12

That'd mean passing through information from the controller down to this point in the code so that it can set it up to iterate sequentially instead of randomly.