Add pagination for indicators

src/main/java/ru/ulstu/aspirant/controller/AspirantController.java

@@ -1,18 +1,26 @@
 package ru.ulstu.aspirant.controller;
 
+import org.springframework.data.domain.Page;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import ru.ulstu.aspirant.model.Report;
 import ru.ulstu.aspirant.service.AspirantService;
 import ru.ulstu.indicator.model.Indicator;
+import ru.ulstu.model.OffsetablePageRequest;
 
 import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
 
 @Controller
 @RequestMapping("aspirant")
 public class AspirantController {
+    private static final Integer DEFAULT_PAGE_SIZE = 1;
+    private static final Integer DEFAULT_PAGE_NUMBER = 1;
     private final AspirantService aspirantService;
 
     public AspirantController(AspirantService aspirantService) {
@@ -20,9 +28,22 @@ public class AspirantController {
     }
 
     @GetMapping("aspirantReport")
-    public String createReport(Model model) {
-        List<Indicator> indicators = aspirantService.getIndicatorsByCourse();
+    public String createReport(Model model,
+                               @RequestParam Optional<Integer> page,
+                               @RequestParam Optional<Integer> size) {
+        int currentPage = page.orElse(DEFAULT_PAGE_NUMBER);
+        int pageSize = size.orElse(DEFAULT_PAGE_SIZE);
+
+        Page<Indicator> indicators = aspirantService.getIndicatorsByCourse(new OffsetablePageRequest(currentPage - 1, pageSize));
         model.addAttribute("indicators", indicators);
+        int totalPages = indicators.getTotalPages();
+        if (totalPages > 0) {
+            List<Integer> pageNumbers = IntStream.rangeClosed(1, totalPages)
+                    .boxed()
+                    .collect(Collectors.toList());
+            model.addAttribute("pageNumbers", pageNumbers);
+        }
+
         model.addAttribute("report", new Report());
         return "aspirant/editReport";
     }

src/main/java/ru/ulstu/aspirant/service/AspirantService.java

@@ -1,5 +1,7 @@
 package ru.ulstu.aspirant.service;
 
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import ru.ulstu.admin.model.AspirantForm;
 import ru.ulstu.aspirant.model.Aspirant;
@@ -48,4 +50,8 @@ public class AspirantService {
         Aspirant aspirant = getAspirantByUser(UserUtils.getCurrentUserLogin());
         return indicatorService.getIndicatorsByCourse(aspirant.getCourse());
     }
+
+    public Page<Indicator> getIndicatorsByCourse(Pageable pageable) {
+        return indicatorService.getIndicatorsByCourse(pageable);
+    }
 }

src/main/java/ru/ulstu/indicator/service/IndicatorService.java

@@ -1,5 +1,7 @@
 package ru.ulstu.indicator.service;
 
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
 import ru.ulstu.admin.model.IndicatorForm;
 import ru.ulstu.indicator.model.Course;
@@ -39,4 +41,8 @@ public class IndicatorService {
     public List<Indicator> getIndicatorsByCourse(Course course) {
         return indicatorRepository.findAllByCourse(course);
     }
+
+    public Page<Indicator> getIndicatorsByCourse(Pageable pageable) {
+        return indicatorRepository.findAll(pageable);
+    }
 }

src/main/resources/templates/aspirant/editReport.html

@@ -99,6 +99,15 @@
         </button>
         <a href="/aspirant/reports" class="btn btn-outline-dark">Отмена</a>
     </form>
+    <div th:if="${indicators.totalPages > 0}" class="pagination">
+        <span style="float: left; padding: 5px 5px;">Страницы:</span>
+    </div>
+    <div th:if="${indicators.totalPages > 0}" class="pagination"
+         th:each="pageNumber : ${pageNumbers}">
+        <a th:href="@{/aspirant/aspirantReport(size=${indicators.size}, page=${pageNumber})}"
+           th:text=${pageNumber}
+           th:class="${pageNumber == indicators.number+1} ? active"></a>
+    </div>
     <link rel="stylesheet" href="/webjars/font-awesome/4.7.0/css/font-awesome.min.css"/>
     <link rel="stylesheet" href="/webjars/bootstrap-glyphicons/bdd2cbfba0/css/bootstrap-glyphicons.css"/>
 </div>