api params to filter projects

apps/dnet-exporter-api/src/main/java/eu/dnetlib/openaire/community/CommunityApiController.java

@@ -138,9 +138,13 @@ public class CommunityApiController extends AbstractDnetController {
 		@ApiResponse(responseCode = "404", description = "not found"),
 		@ApiResponse(responseCode = "500", description = "unexpected error")
 	})
-	public Page<CommunityProject> getCommunityProjects(@PathVariable final String id, @PathVariable final Integer page, @PathVariable final Integer size)
+	public Page<CommunityProject> getCommunityProjects(@PathVariable final String id,
+		@PathVariable final Integer page,
+		@PathVariable final Integer size,
+		@RequestParam(required = false) final String funder,
+		@RequestParam(required = false) final String searchFilter)
 		throws CommunityException {
-		return communityService.getCommunityProjects(id, page, size);
+		return communityService.getCommunityProjects(id, funder, searchFilter, page, size);
 	}
 
 	@RequestMapping(value = "/community/{id}/projects", produces = {

apps/dnet-exporter-api/src/main/java/eu/dnetlib/openaire/community/CommunityService.java

@@ -1,6 +1,7 @@
 package eu.dnetlib.openaire.community;
 
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -10,6 +11,7 @@ import java.util.function.BiConsumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import javax.persistence.criteria.Predicate;
 import javax.transaction.Transactional;
 
 import org.apache.commons.lang3.StringUtils;
@@ -19,6 +21,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
+import org.springframework.data.jpa.domain.Specification;
 import org.springframework.stereotype.Service;
 
 import eu.dnetlib.openaire.community.model.DbCommunity;
@@ -129,15 +132,52 @@ public class CommunityService {
 	}
 
 	@Transactional
-	public Page<CommunityProject> getCommunityProjects(final String id, final int page, final int size) throws CommunityException {
+	public Page<CommunityProject> getCommunityProjects(final String id, final String funder, final String filter, final int page, final int size)
+		throws CommunityException {
+		if (StringUtils.isBlank(id)) { throw new CommunityException("Empty ID"); }
 		try {
+			if (StringUtils.isAllBlank(filter, funder)) {
 				return dbProjectRepository.findByCommunity(id, PageRequest.of(page, size)).map(CommunityMappingUtils::toCommunityProject);
+			} else {
+				final Specification<DbProject> projSpec = prepareProjectSpec(id, funder, filter);
+				return dbProjectRepository.findAll(projSpec, PageRequest.of(page, size)).map(CommunityMappingUtils::toCommunityProject);
+			}
 		} catch (final Throwable e) {
 			log.error(e);
 			throw new CommunityException(e);
 		}
 	}
 
+	private Specification<DbProject> prepareProjectSpec(final String community, final String funder, final String other) {
+		return (project, query, cb) -> {
+
+			final List<Predicate> andConds = new ArrayList<>();
+			andConds.add(cb.equal(project.get("community"), community));
+
+			if (StringUtils.isNotBlank(funder)) {
+				andConds.add(cb.equal(project.get("projectFunder"), funder));
+			}
+
+			if (StringUtils.isNotBlank(other)) {
+				final String s = other.toLowerCase().trim();
+
+				final List<Predicate> orConds = new ArrayList<>();
+				orConds.add(cb.equal(cb.lower(project.get("projectId")), s));
+				orConds.add(cb.equal(cb.lower(project.get("projectCode")), s));
+				orConds.add(cb.equal(cb.lower(project.get("projectAcronym")), s));
+				orConds.add(cb.like(cb.lower(project.get("projectName")), "%" + s + "%"));
+				if (StringUtils.isBlank(funder)) {
+					orConds.add(cb.equal(cb.lower(project.get("projectFunder")), s));
+				}
+
+				andConds.add(cb.or(orConds.toArray(new Predicate[orConds.size()])));
+			}
+
+			return cb.and(andConds.toArray(new Predicate[andConds.size()]));
+		};
+
+	}
+
 	@Transactional
 	public CommunityProject addCommunityProject(final String id, final CommunityProject project) throws CommunityException {
 		try {

apps/dnet-exporter-api/src/main/java/eu/dnetlib/openaire/community/repository/DbProjectRepository.java

@@ -4,12 +4,13 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 
 import eu.dnetlib.openaire.community.model.DbProject;
 import eu.dnetlib.openaire.community.model.DbProjectPK;
 
 @ConditionalOnProperty(value = "openaire.exporter.enable.community", havingValue = "true")
-public interface DbProjectRepository extends JpaRepository<DbProject, DbProjectPK> {
+public interface DbProjectRepository extends JpaRepository<DbProject, DbProjectPK>, JpaSpecificationExecutor<DbProject> {
 
 	Page<DbProject> findByCommunity(String community, Pageable page);