fix: check if fields present in author before adding mention

ewan-escience commented 1 month ago

Prevent undefined authors in mentions

Changes proposed in this pull request:

Prevent Crossref mentions form having undefined authors by checking if the fields are present first
Try to use the name field if either given or family is missing
Apply the same logic to the Crossref scraper

How to test:

docker compose down --volumes && docker compose build --parallel && docker compose up --scale data-generation=0
Create some page, add a mention with DOI 10.1103/physrevd.108.072003
Check the last author, this should be ATLAS Collaboration
The words undefined or null should not be part of the authors
Run the mention scraper: docker compose exec scrapers java -cp /usr/myjava/scrapers.jar nl.esciencecenter.rsd.scraper.doi.MainMentions
The last author should be unchanged
The words undefined or null should not be part of the authors