Show fetch exception at citation relation

[koppor]

Background

The API does not return the citing information, but their web page does

https://www.semanticscholar.org/paper/Decentralized-Application-Placement-in-Fog-Mann/6870975f7f4db00ad1e2fa041545b67c6e8ef73c

Steps to test

1. Add paper with DOI 10.1109/TPDS.2022.3148985
2. Open tab "Citaton relations"

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• Change in CHANGELOG.md described in a way that is understandable for the average user (if change is visible to the user)
• [/] Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (if change is visible to the user)
• [/] Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• [/] Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[trag-bot]

@trag-bot didn't find any issues in the code! ✅✨

[Siedlerchr]

Why another json library?

[Siedlerchr]

For optionals use kongs unirest json

[koppor]

Why another json library?

Because I know the author personally. And it is fast

[koppor]

For optionals use kongs unirest json

Show me. 😅

[Siedlerchr]

Because I know the author personally. And it is fast
Argument by authority is not a valid reason

see: eg.g
JSONObject result = item.getJSONObject("resultList").getJSONArray("result").getJSONObject(0);

jabref/jablib/src/main/java/org/jabref/logic/importer/fetcher/EuropePmcFetcher.java

Line 117 in e29044c

Optional.ofNullable(result.optString("pubModel")).ifPresent(pubModel -> entry.setField(StandardField.HOWPUBLISHED, pubModel));

[Siedlerchr]

Use kong's unirest json that allows you to use optionals

            JSONObject response = JsonReader.toJsonObject(inputStream);


      JSONObject journal = journalInfo.getJSONObject("journal");
                    Optional.ofNullable(journal.optString("title")).ifPresent(title -> entry.setField(StandardField.JOURNAL, title));
                    ```

[Siedlerchr]

no new json library
use kongs unirest json for this