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Added error msg when isbn entry was not found #7036

Merged
merged 3 commits into from
Oct 22, 2020
Merged

Added error msg when isbn entry was not found #7036

merged 3 commits into from
Oct 22, 2020

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tmrd993
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@tmrd993 tmrd993 commented Oct 22, 2020

Fixes #7000
Added an error message that gets shown when the entered ISBN leads to no results on ebook.de and ottobib.

Screenshot of change:
errormessage

  • Change in CHANGELOG.md described (if applicable)
  • Tests created for changes (if applicable)
  • Manually tested changed features in running JabRef (always required)
  • Screenshots added in PR description (for UI changes)
  • Checked documentation: Is the information available and up to date? If not created an issue at https://github.com/JabRef/user-documentation/issues or, even better, submitted a pull request to the documentation repository.

// inspect the "no results" error message (if there is one)
Element potentialErrorMessageDiv = html.select("div#flash-notice.notice.add-bottom").first();
if (potentialErrorMessageDiv.hasText() && potentialErrorMessageDiv.text().contains("No Results")) {
LOGGER.error("ISBN " + identifier + " not found at ottobib");
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Suggested change
LOGGER.error("ISBN " + identifier + " not found at ottobib");
LOGGER.error("ISBN { } not found at ottobib", identifier);

This is the recommended way

@@ -59,6 +62,13 @@ public String getName() {
bibEntry = isbnViaOttoBibFetcher.performSearchById(identifier);
}

// nothing found at ebook.de and ottobib
if (!bibEntry.isPresent()) {
FXDialog noEntryFoundDialog = new FXDialog(AlertType.ERROR);
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This is not the right place. You cannot put GUI code into logic/model classes.
See https://devdocs.jabref.org/getting-into-the-code/high-level-documentation

The right place to check if the results are empty would be here: Than you have it generic as well for all kind of fetchers

Optional<BibEntry> result = fetcherWorker.getValue();

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oops, my mistake. I'll fix it later today. I have another question about the ottobib fetcher though, should getting no results throw an exception? Ottobib seems like a special case since supplying an ISBN that leads to no entry doesn't give a 404 but instead leads to a special page with an error message.

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I thought about throwing a fetcher exception as well. But on the other hand we have optional for those cases.
So I would not throw an exception.
@tobiasdiez

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@calixtus calixtus Oct 22, 2020

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Thanks for your work so far.

Exceptions are only for exceptional program states. An unkown ISBN is a possible case in Ottobib. Thats probably why Ottobib does not show 404, but a page saying: unkown ISBN.
See: https://github.com/HugoMatilla/Effective-JAVA-Summary#57-use-exceptions-only-for-exceptional-conditions

} else if (result.isEmpty()) {
String fetcher = selectedItemProperty().getValue().getName();
String searchId = idText.getValue();
dialogService.showErrorDialogAndWait(Localization.lang("Fetcher '%0' did not find an entry for id '%1'.", fetcher, searchId));
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Can I leave this error message or should it be unique?

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Yes, looks good so far

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@Siedlerchr Siedlerchr left a comment

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Thanks again for your contribution.👍
I only have a minor suggestion regarding the changelog

} else if (result.isEmpty()) {
String fetcher = selectedItemProperty().getValue().getName();
String searchId = idText.getValue();
dialogService.showErrorDialogAndWait(Localization.lang("Fetcher '%0' did not find an entry for id '%1'.", fetcher, searchId));
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Yes, looks good so far

CHANGELOG.md Outdated Show resolved Hide resolved
Co-authored-by: Christoph <[email protected]>
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@calixtus calixtus left a comment

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Looks good! Thank you for your contribution. Took the liberty to commit the changes Chris suggested, so we can merge this.

@calixtus calixtus changed the title add error msg when isbn entry not found Added error msg when isbn entry was not found Oct 22, 2020
@calixtus calixtus merged commit 590e2c3 into JabRef:master Oct 22, 2020
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Nothing happens creating entry from specific ISBN
3 participants