Fetcher OttoBib

src/main/java/org/jabref/logic/importer/fetcher/IsbnFetcher.java

@@ -18,7 +18,7 @@
 import org.slf4j.LoggerFactory;
 
 /**
- * Fetcher for ISBN trying ebook.de first and then chimbori.com
+ * Fetcher for ISBN trying ebook.de first, chimbori.com and then ottobib
  */
 public class IsbnFetcher implements EntryBasedFetcher, IdBasedFetcher {
 
@@ -47,12 +47,19 @@ public Optional<BibEntry> performSearchById(String identifier) throws FetcherExc
 
         IsbnViaEbookDeFetcher isbnViaEbookDeFetcher = new IsbnViaEbookDeFetcher(importFormatPreferences);
         Optional<BibEntry> bibEntry = isbnViaEbookDeFetcher.performSearchById(identifier);
+
         // nothing found at ebook.de, try chimbori.com
         if (!bibEntry.isPresent()) {
             LOGGER.debug("No entry found at ebook.de try chimbori.com");
             IsbnViaChimboriFetcher isbnViaChimboriFetcher = new IsbnViaChimboriFetcher(importFormatPreferences);
             bibEntry = isbnViaChimboriFetcher.performSearchById(identifier);
+        }
 
+        //nothing found at ebook.de and chimbori.com, try ottobib
+        if (!bibEntry.isPresent()) {
+            LOGGER.debug("No entry found at ebook.de and chimbori.com try ottobib");
+            IsbnViaOttoBibFetcher isbnViaOttoBibFetcher = new IsbnViaOttoBibFetcher(importFormatPreferences);
+            bibEntry = isbnViaOttoBibFetcher.performSearchById(identifier);
         }
 
         return bibEntry;

src/main/java/org/jabref/logic/importer/fetcher/IsbnViaOttoBibFetcher.java

@@ -0,0 +1,91 @@
+package org.jabref.logic.importer.fetcher;
+
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.List;
+import java.util.Optional;
+
+import org.jabref.logic.importer.FetcherException;
+import org.jabref.logic.importer.ImportFormatPreferences;
+import org.jabref.logic.importer.ParseException;
+import org.jabref.model.entry.BibEntry;
+import org.jabref.model.strings.StringUtil;
+
+import com.mashape.unirest.http.HttpResponse;
+import com.mashape.unirest.http.Unirest;
+import com.mashape.unirest.http.exceptions.UnirestException;
+
+/**
+ * Fetcher for ISBN using https://www.ottobib.com
+ */
+public class IsbnViaOttoBibFetcher extends AbstractIsbnFetcher {
+
+    public IsbnViaOttoBibFetcher(ImportFormatPreferences importFormatPreferences) {
+        super(importFormatPreferences);
+    }
+
+    @Override
+    public String getName() {
+        return "ISBN (OttoBib)";
+    }
+
+    /**
+     * @return null, because the identifier is passed using form data. This method is not used.
+     */
+    @Override
+    public URL getURLForID(String identifier) throws URISyntaxException, MalformedURLException, FetcherException {
+        return null;
+    }
+
+    @Override
+    public Optional<BibEntry> performSearchById(String identifier) throws FetcherException {
+        if (StringUtil.isBlank(identifier)) {
+            return Optional.empty();
+        }
+
+        this.ensureThatIsbnIsValid(identifier);
+
+        HttpResponse<String> postResponse;
+
+        String BASE_URL = "https://www.ottobib.com/isbn/" + identifier + "/bibtex";
+
+        try {
+            postResponse = Unirest.post(BASE_URL)
+                    .asString();
+        } catch (UnirestException e) {
+            throw new FetcherException("Could not retrieve data from ottobib.com", e);
+        }
+        if (postResponse.getStatus() != 200) {
+            throw new FetcherException("Error while retrieving data from ottobib.com: " + postResponse.getBody());
+        }
+
+        List<BibEntry> fetchedEntries;
+        try {
+            fetchedEntries = getParser().parseEntries(postResponse.getRawBody());
+        } catch (ParseException e) {
+            throw new FetcherException("An internal parser error occurred", e);
+        }
+        if (fetchedEntries.isEmpty()) {
+            return Optional.empty();
+        } else if (fetchedEntries.size() > 1) {
+            LOGGER.info("Fetcher " + getName() + "found more than one result for identifier " + identifier
+                    + ". We will use the first entry.");
+        }
+
+        BibEntry entry = fetchedEntries.get(0);
+
+        // ottobib does not return an ISBN.
+        entry.setField("isbn", identifier);
+
+        doPostCleanup(entry);
+
+        return Optional.of(entry);
+    }
+
+    @Override
+    public void doPostCleanup(BibEntry entry) {
+
+    }
+
+}

src/test/java/org/jabref/logic/importer/WebFetchersTest.java

@@ -7,6 +7,7 @@
 import org.jabref.logic.importer.fetcher.AbstractIsbnFetcher;
 import org.jabref.logic.importer.fetcher.IsbnViaChimboriFetcher;
 import org.jabref.logic.importer.fetcher.IsbnViaEbookDeFetcher;
+import org.jabref.logic.importer.fetcher.IsbnViaOttoBibFetcher;
 import org.jabref.logic.importer.fetcher.MrDLibFetcher;
 
 import org.junit.jupiter.api.BeforeEach;
@@ -36,6 +37,7 @@ void getIdBasedFetchersReturnsAllFetcherDerivingFromIdBasedFetcher() throws Exce
         // Remove special ISBN fetcher since we don't want to expose them to the user
         expected.remove(IsbnViaChimboriFetcher.class);
         expected.remove(IsbnViaEbookDeFetcher.class);
+        expected.remove(IsbnViaOttoBibFetcher.class);
         assertEquals(expected, getClasses(idFetchers));
     }