JabRef · Siedlerchr · Nov 6, 2023 · Oct 23, 2023 · Oct 23, 2023 · Oct 29, 2023
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -13,6 +13,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 
 - We added a dropdown menu to let users change the reference library during AUX file import. [#10472](https://github.com/JabRef/jabref/issues/10472)
 - We added a button to let users reset the cite command to the default value. [#10569](https://github.com/JabRef/jabref/issues/10569)
+- We added [scholar.archive.org](https://scholar.archive.org/) as a new fetcher. [#10498](https://github.com/JabRef/jabref/issues/10498)
 
 ### Changed
 

diff --git a/src/main/java/org/jabref/logic/importer/WebFetchers.java b/src/main/java/org/jabref/logic/importer/WebFetchers.java
@@ -37,6 +37,7 @@
 import org.jabref.logic.importer.fetcher.OpenAccessDoi;
 import org.jabref.logic.importer.fetcher.ResearchGate;
 import org.jabref.logic.importer.fetcher.RfcFetcher;
+import org.jabref.logic.importer.fetcher.ScholarArchiveFetcher;
 import org.jabref.logic.importer.fetcher.ScienceDirect;
 import org.jabref.logic.importer.fetcher.SemanticScholar;
 import org.jabref.logic.importer.fetcher.SpringerFetcher;
@@ -126,6 +127,7 @@ public static SortedSet<SearchBasedFetcher> getSearchBasedFetchers(ImportFormatP
         set.add(new ResearchGate(importFormatPreferences));
         set.add(new BiodiversityLibrary(importerPreferences));
         set.add(new LOBIDFetcher(importerPreferences));
+        set.add(new ScholarArchiveFetcher());
         return set;
     }
 

diff --git a/src/main/java/org/jabref/logic/importer/fetcher/ScholarArchiveFetcher.java b/src/main/java/org/jabref/logic/importer/fetcher/ScholarArchiveFetcher.java
@@ -0,0 +1,158 @@
+package org.jabref.logic.importer.fetcher;
+
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.IntStream;
+
+import org.jabref.logic.importer.FetcherException;
+import org.jabref.logic.importer.PagedSearchBasedParserFetcher;
+import org.jabref.logic.importer.ParseException;
+import org.jabref.logic.importer.Parser;
+import org.jabref.logic.importer.fetcher.transformers.ScholarArchiveQueryTransformer;
+import org.jabref.logic.importer.util.JsonReader;
+import org.jabref.logic.net.URLDownload;
+import org.jabref.model.entry.AuthorList;
+import org.jabref.model.entry.BibEntry;
+import org.jabref.model.entry.field.StandardField;
+import org.jabref.model.entry.types.EntryType;
+import org.jabref.model.entry.types.StandardEntryType;
+
+import jakarta.ws.rs.core.MediaType;
+import kong.unirest.json.JSONArray;
+import kong.unirest.json.JSONException;
+import kong.unirest.json.JSONObject;
+import org.apache.http.client.utils.URIBuilder;
+import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ScholarArchiveFetcher implements PagedSearchBasedParserFetcher {
+
+    public static final String FETCHER_NAME = "ScholarArchive";
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ScholarArchiveFetcher.class);
+
+    private static final String API_URL = "https://scholar.archive.org/search";
+
+    /**
+     * Gets the query URL by luceneQuery and pageNumber.
+     *
+     * @param luceneQuery the search query
+     * @param pageNumber  the number of the page indexed from 0
+     * @return URL
+     */
+    @Override
+    public URL getURLForQuery(QueryNode luceneQuery, int pageNumber) throws URISyntaxException, MalformedURLException, FetcherException {
+        URIBuilder uriBuilder = new URIBuilder(API_URL);
+        uriBuilder.addParameter("q", new ScholarArchiveQueryTransformer().transformLuceneQuery(luceneQuery).orElse(""));
+        uriBuilder.addParameter("from", String.valueOf(getPageSize() * pageNumber));
+        uriBuilder.addParameter("size", String.valueOf(getPageSize()));
+        uriBuilder.addParameter("format", "json");
+
+        LOGGER.debug("using URL for search {}", uriBuilder.build());
+        return uriBuilder.build().toURL();
+    }
+
+    @Override
+    public URLDownload getUrlDownload(URL url) {
+        URLDownload download = new URLDownload(url);
+        download.addHeader("Accept", MediaType.APPLICATION_JSON);
+        return download;
+    }
+
+    /**
+     * Gets the list of BibEntry by given Json response from scholar archive fetcher API
+     *
+     * @return Parser, list of BibEntry
+     */
+    @Override
+    public Parser getParser() {
+        return inputStream -> {
+            JSONObject response = JsonReader.toJsonObject(inputStream);
+            List<BibEntry> entries = new ArrayList<>();
+            if (response.has("results")) {
+                JSONArray results = response.getJSONArray("results");
+                for (int i = 0; i < results.length(); i++) {
+                    JSONObject jsonEntry = results.getJSONObject(i);
+                    BibEntry entry = parseJSONtoBibtex(jsonEntry);
+                    entries.add(entry);
+                }
+            }
+
+            return entries;
+        };
+    }
+
+    @Override
+    public String getName() {
+        return FETCHER_NAME;
+    }
+
+    private BibEntry parseJSONtoBibtex(JSONObject jsonEntry) throws ParseException {
+        try {
+            BibEntry entry = new BibEntry();
+            EntryType entryType = StandardEntryType.InCollection;
+            JSONObject biblio = jsonEntry.optJSONObject("biblio");
+
+            JSONArray abstracts = jsonEntry.getJSONArray("abstracts");
+            String foundAbstract = IntStream.range(0, abstracts.length())
+                                            .mapToObj(abstracts::getJSONObject)
+                                            .map(object -> object.optString("body"))
+                                            .findFirst().orElse("");
+
+            String url = Optional.ofNullable(jsonEntry.optJSONObject("fulltext")).map(fullText -> fullText.optString("access_url")).orElse("");
+
+            // publication type
+            String type = biblio.optString("release_type");
+            entry.setField(StandardField.TYPE, type);
+            if (type.toLowerCase().contains("book")) {
+                entryType = StandardEntryType.Book;
+            } else if (type.toLowerCase().contains("article")) {
+                entryType = StandardEntryType.Article;
+            }
+            entry.setType(entryType);
+
+            entry.setField(StandardField.TITLE, biblio.optString("title"));
+            entry.setField(StandardField.JOURNAL, biblio.optString("container_name"));
+            entry.setField(StandardField.DOI, biblio.optString("doi"));
+            entry.setField(StandardField.ISSUE, biblio.optString("issue"));
+            entry.setField(StandardField.LANGUAGE, biblio.optString("lang_code"));
+            entry.setField(StandardField.PUBLISHER, biblio.optString("publisher"));
+
+            entry.setField(StandardField.YEAR, String.valueOf(biblio.optInt("release_year")));
+            entry.setField(StandardField.VOLUME, String.valueOf(biblio.optInt("volume_int")));
+            entry.setField(StandardField.ABSTRACT, foundAbstract);
+            entry.setField(StandardField.URL, url);
+
+            String dateString = biblio.optString("date");
+            entry.setField(StandardField.DATE, dateString);
+
+            // Authors are in contrib_names
+            if (biblio.has("contrib_names")) {
+                JSONArray authors = biblio.getJSONArray("contrib_names");
+                List<String> authorList = new ArrayList<>();
+                for (int i = 0; i < authors.length(); i++) {
+                    authorList.add(authors.getString(i));
+                }
+                AuthorList parsedAuthors = AuthorList.parse(String.join(" and ", authorList));
+                entry.setField(StandardField.AUTHOR, parsedAuthors.getAsLastFirstNamesWithAnd(false));
+            }
+
+            if (biblio.has("issns")) {
+                JSONArray issn = biblio.getJSONArray("issns");
+                List<String> issnList = new ArrayList<>();
+                for (int i = 0; i < issn.length(); i++) {
+                    issnList.add(issn.getString(i));
+                }
+                entry.setField(StandardField.ISSN, String.join(" ", issnList));
+            }
+            return entry;
+        } catch (JSONException exception) {
+            throw new ParseException("ScholarArchive API JSON format has changed", exception);
+        }
+    }
+}
diff --git a/...n/java/org/jabref/logic/importer/fetcher/transformers/ScholarArchiveQueryTransformer.java b/...n/java/org/jabref/logic/importer/fetcher/transformers/ScholarArchiveQueryTransformer.java
@@ -0,0 +1,71 @@
+package org.jabref.logic.importer.fetcher.transformers;
+
+/**
+ * This class extends the AbstractQueryTransformer to provide specific implementations
+ * for transforming standard queries into ones suitable for the Scholar Archive's unique format.
+ */
+public class ScholarArchiveQueryTransformer extends AbstractQueryTransformer {
+
+    @Override
+    protected String getLogicalAndOperator() {
+        return " AND ";
+    }
+
+    @Override
+    protected String getLogicalOrOperator() {
+        return " OR ";
+    }
+
+    @Override
+    protected String getLogicalNotOperator() {
+        return "NOT ";
+    }
+
+    @Override
+    protected String handleAuthor(String author) {
+        return createKeyValuePair("contrib_names", author);
+    }
+
+    @Override
+    protected String handleTitle(String title) {
+        return createKeyValuePair("title", title);
+    }
+
+    @Override
+    protected String handleJournal(String journalTitle) {
+        return createKeyValuePair("container_name", journalTitle);
+    }
+
+    /**
+     * Handles the year query by formatting it specifically for a range search in the Scholar Archive.
+     * This method is for an exact year match.
+     *
+     * @param year the publication year to be searched in the Scholar Archive.
+     * @return A string query segment formatted for the year search.
+     */
+    @Override
+    protected String handleYear(String year) {
+        return "publication.startDate:[" + year + " TO " + year + "]";
+    }
+
+    /**
+     * Handles a year range query, transforming it for the Scholar Archive's query format.
+     * If only a start year is provided, the range will extend to the current year.
+     *
+     * @param yearRange the range of years to be searched in the Scholar Archive, usually in the format "startYear-endYear".
+     * @return A string query segment formatted for the year range search.
+     */
+    @Override
+    protected String handleYearRange(String yearRange) {
+        parseYearRange(yearRange);
+        if (endYear == Integer.MAX_VALUE) {
+            // If no specific end year is set, it assumes the range extends to the current year.
+            return yearRange;
+        }
+        return "publication.startDate:[" + startYear + " TO " + endYear + "]";
+    }
+}
+
+
+
+
diff --git a/src/test/java/org/jabref/gui/slr/ManageStudyDefinitionViewModelTest.java b/src/test/java/org/jabref/gui/slr/ManageStudyDefinitionViewModelTest.java
@@ -51,6 +51,7 @@ public void emptyStudyConstructorFillsDatabasesCorrectly() {
                 new StudyCatalogItem("Medline/PubMed", false),
                 new StudyCatalogItem("ResearchGate", false),
                 new StudyCatalogItem("SAO/NASA ADS", false),
+                new StudyCatalogItem("ScholarArchive", false),
                 new StudyCatalogItem("SemanticScholar", false),
                 new StudyCatalogItem("Springer", true),
                 new StudyCatalogItem("zbMATH", false)
@@ -59,21 +60,7 @@ public void emptyStudyConstructorFillsDatabasesCorrectly() {
 
     @Test
     public void studyConstructorFillsDatabasesCorrectly(@TempDir Path tempDir) {
-        List<StudyDatabase> databases = List.of(
-                new StudyDatabase("ACM Portal", true));
-        Study study = new Study(
-                List.of("Name"),
-                "title",
-                List.of("Q1"),
-                List.of(),
-                databases
-        );
-        ManageStudyDefinitionViewModel manageStudyDefinitionViewModel = new ManageStudyDefinitionViewModel(
-                study,
-                tempDir,
-                importFormatPreferences,
-                importerPreferences,
-                dialogService);
+        ManageStudyDefinitionViewModel manageStudyDefinitionViewModel = getManageStudyDefinitionViewModel(tempDir);
         assertEquals(List.of(
                 new StudyCatalogItem("ACM Portal", true),
                 new StudyCatalogItem("ArXiv", false),
@@ -92,9 +79,28 @@ public void studyConstructorFillsDatabasesCorrectly(@TempDir Path tempDir) {
                 new StudyCatalogItem("Medline/PubMed", false),
                 new StudyCatalogItem("ResearchGate", false),
                 new StudyCatalogItem("SAO/NASA ADS", false),
+                new StudyCatalogItem("ScholarArchive", false),
                 new StudyCatalogItem("SemanticScholar", false),
                 new StudyCatalogItem("Springer", false),
                 new StudyCatalogItem("zbMATH", false)
         ), manageStudyDefinitionViewModel.getCatalogs());
     }
+
+    private ManageStudyDefinitionViewModel getManageStudyDefinitionViewModel(Path tempDir) {
+        List<StudyDatabase> databases = List.of(
+                new StudyDatabase("ACM Portal", true));
+        Study study = new Study(
+                List.of("Name"),
+                "title",
+                List.of("Q1"),
+                List.of(),
+                databases
+        );
+        return new ManageStudyDefinitionViewModel(
+                study,
+                tempDir,
+                importFormatPreferences,
+                importerPreferences,
+                dialogService);
+    }
 }
diff --git a/src/test/java/org/jabref/logic/importer/fetcher/ScholarArchiveFetcherTest.java b/src/test/java/org/jabref/logic/importer/fetcher/ScholarArchiveFetcherTest.java
@@ -0,0 +1,51 @@
+package org.jabref.logic.importer.fetcher;
+
+import java.util.List;
+
+import org.jabref.logic.importer.FetcherException;
+import org.jabref.model.entry.BibEntry;
+import org.jabref.model.entry.field.StandardField;
+import org.jabref.model.entry.types.StandardEntryType;
+import org.jabref.testutils.category.FetcherTest;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@FetcherTest
+public class ScholarArchiveFetcherTest {
+    private ScholarArchiveFetcher fetcher;
+    private BibEntry bibEntry;
+
+    @BeforeEach
+    public void setUp() {
+        fetcher = new ScholarArchiveFetcher();
+        bibEntry = new BibEntry(StandardEntryType.InCollection)
+                .withField(StandardField.TITLE, "Query expansion using associated queries")
+                .withField(StandardField.AUTHOR, "Billerbeck, Bodo and Scholer, Falk and Williams, Hugh E. and Zobel, Justin")
+                .withField(StandardField.VOLUME, "0")
+                .withField(StandardField.DOI, "10.1145/956863.956866")
+                .withField(StandardField.JOURNAL, "Proceedings of the twelfth international conference on Information and knowledge management - CIKM '03")
+                .withField(StandardField.PUBLISHER, "ACM Press")
+                .withField(StandardField.TYPE, "paper-conference")
+                .withField(StandardField.YEAR, "2003")
+                .withField(StandardField.URL, "https://web.archive.org/web/20170810164449/http://goanna.cs.rmit.edu.au/~jz/fulltext/cikm03.pdf");
+    }
+
+    @Test
+    public void getNameReturnsCorrectName() {
+        assertEquals("ScholarArchive", fetcher.getName());
+    }
+
+    @Test
+    public void performSearchReturnsExpectedResults() throws FetcherException {
+        List<BibEntry> fetchedEntries = fetcher.performSearch("query");
+        fetchedEntries.forEach(entry -> entry.clearField(StandardField.ABSTRACT));
+        assertTrue(fetchedEntries.contains(bibEntry), "Found the following entries " + fetchedEntries);
+    }
+}
+
+
+