new API action for providing KonText defaults (namely "viewattrs" for now)

[tomachalek]

PUT /corpora/{corpusId}/kontextDefaults

PUT /corpora/{subdir}/{corpusId}/kontextDefaults

The action should infer default view properties for a corpus, store them to the database.

A response should contain values stored to database and the format should be a JSON with the schema matching actual user-corpus options stored in db or like in case of default options stored for corpus in db (the discussed API function will actually serve as a source of those defaults).

For now, we are interested only in attrs (i.e. positional attributes shown by default in concordances.

{
  "viewattrs": {
    "attrs": "word,lemma,tag"
  } 
}

The algorithm of selecting the attributes should be as follows:

• look for entries in kontext_simple_query_default_attrs
  • in case there are some, use those
  • else
    • select word
    • look for lemma - if exists, then select
• look for defined tagsets (tables tagset and corpus_tagset) and use respective attributes