Added component search endpoint.

src/main/java/nl/andrewl/railsignalapi/dao/ComponentRepository.java

@@ -3,7 +3,9 @@ package nl.andrewl.railsignalapi.dao;
 import nl.andrewl.railsignalapi.model.RailSystem;
 import nl.andrewl.railsignalapi.model.component.Component;
 import nl.andrewl.railsignalapi.model.component.Position;
+import org.springframework.data.domain.Page;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.stereotype.Repository;
 
@@ -11,7 +13,7 @@ import java.util.List;
 import java.util.Optional;
 
 @Repository
-public interface ComponentRepository<T extends Component> extends JpaRepository<T, Long> {
+public interface ComponentRepository<T extends Component> extends JpaRepository<T, Long>, JpaSpecificationExecutor<T> {
 	Optional<T> findByIdAndRailSystemId(long id, long rsId);
 
 	boolean existsByNameAndRailSystem(String name, RailSystem rs);

src/main/java/nl/andrewl/railsignalapi/rest/ComponentsApiController.java

@@ -4,12 +4,15 @@ import lombok.RequiredArgsConstructor;
 import nl.andrewl.railsignalapi.rest.dto.PathNodeUpdatePayload;
 import nl.andrewl.railsignalapi.rest.dto.component.in.ComponentPayload;
 import nl.andrewl.railsignalapi.rest.dto.component.out.ComponentResponse;
+import nl.andrewl.railsignalapi.rest.dto.component.out.SimpleComponentResponse;
 import nl.andrewl.railsignalapi.service.ComponentCreationService;
 import nl.andrewl.railsignalapi.service.ComponentService;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.web.PageableDefault;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
-import javax.validation.Valid;
 import java.util.List;
 
 @RestController
@@ -24,6 +27,15 @@ public class ComponentsApiController {
 		return componentService.getComponents(rsId);
 	}
 
+	@GetMapping(path = "/search")
+	public Page<SimpleComponentResponse> searchComponents(
+			@RequestParam(name = "q", required = false) String searchQuery,
+			@PageableDefault(sort = "name")
+			Pageable pageable
+	) {
+		return componentService.search(searchQuery, pageable);
+	}
+
 	@GetMapping(path = "/{cId}")
 	public ComponentResponse getComponent(@PathVariable long rsId, @PathVariable long cId) {
 		return componentService.getComponent(rsId, cId);

src/main/java/nl/andrewl/railsignalapi/service/ComponentService.java

@@ -8,6 +8,9 @@ import nl.andrewl.railsignalapi.model.component.Component;
 import nl.andrewl.railsignalapi.model.component.PathNode;
 import nl.andrewl.railsignalapi.rest.dto.PathNodeUpdatePayload;
 import nl.andrewl.railsignalapi.rest.dto.component.out.ComponentResponse;
+import nl.andrewl.railsignalapi.rest.dto.component.out.SimpleComponentResponse;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -38,6 +41,16 @@ public class ComponentService {
 		return ComponentResponse.of(c);
 	}
 
+	@Transactional(readOnly = true)
+	public Page<SimpleComponentResponse> search(String searchQuery, Pageable pageable) {
+		return componentRepository.findAll((root, query, cb) -> {
+			if (searchQuery != null && !searchQuery.isBlank()) {
+				return cb.like(cb.lower(root.get("name")), '%' + searchQuery.toLowerCase() + '%');
+			}
+			return cb.and();
+		}, pageable).map(SimpleComponentResponse::new);
+	}
+
 	@Transactional
 	public void removeComponent(long rsId, long componentId) {
 		var c = componentRepository.findByIdAndRailSystemId(componentId, rsId)

src/main/java/nl/andrewl/railsignalapi/service/SwitchService.java

@@ -9,6 +9,9 @@ import nl.andrewl.railsignalapi.model.component.Switch;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+/**
+ * Service for managing switches.
+ */
 @Service
 @RequiredArgsConstructor
 public class SwitchService {