#91 using RestTemplate & show error on timetable loading exception

src/main/java/ru/ulstu/user/controller/UserMvcController.java

@@ -51,6 +51,6 @@ public class UserMvcController extends OdinController<UserListDto, UserDto> {
 
     @GetMapping("/dashboard")
     public void getUsersDashboard(ModelMap modelMap) {
-        modelMap.addAttribute("users", userService.getUsersInfo());
+        modelMap.addAllAttributes(userService.getUsersInfo());
     }
 }

src/main/java/ru/ulstu/user/service/UserService.java

@@ -42,10 +42,10 @@ import ru.ulstu.user.repository.UserRepository;
 import ru.ulstu.user.repository.UserRoleRepository;
 import ru.ulstu.user.util.UserUtils;
 import ru.ulstu.utils.timetable.TimetableService;
+import ru.ulstu.utils.timetable.errors.TimetableClientException;
 import ru.ulstu.utils.timetable.model.Lesson;
 
 import javax.mail.MessagingException;
-import java.io.IOException;
 import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -358,14 +358,16 @@ public class UserService implements UserDetailsService {
         }
     }
 
-    public List<UserInfoNow> getUsersInfo() {
+    public Map<String, Object> getUsersInfo() {
         List<UserInfoNow> usersInfoNow = new ArrayList<>();
+        String err = "";
+
         for (User user : userRepository.findAll()) {
             Lesson lesson = null;
             try {
                 lesson = timetableService.getCurrentLesson(user.getUserAbbreviate());
-            } catch (IOException e) {
-                e.printStackTrace();
+            } catch (TimetableClientException e) {
+                err = "Не удалось загрузить расписание";
             }
             usersInfoNow.add(new UserInfoNow(
                     lesson,
@@ -374,6 +376,6 @@ public class UserService implements UserDetailsService {
                     userSessionService.isOnline(user))
             );
         }
-        return usersInfoNow;
+        return ImmutableMap.of("users", usersInfoNow, "error", err);
     }
 }

src/main/java/ru/ulstu/utils/timetable/TimetableService.java

@@ -1,15 +1,12 @@
 package ru.ulstu.utils.timetable;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.client.RestTemplate;
+import ru.ulstu.utils.timetable.errors.TimetableClientException;
 import ru.ulstu.utils.timetable.model.Lesson;
 import ru.ulstu.utils.timetable.model.TimetableResponse;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.net.HttpURLConnection;
-import java.net.URL;
-import java.net.URLEncoder;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
@@ -17,10 +14,10 @@ import java.util.Date;
 import java.util.List;
 
 public class TimetableService {
-    private static final String TIMETABLE_URL = "http://timetable.athene.tech";
+    private static final String TIMETABLE_URL = "http://timetable.athene.tech/api/1.0/timetable?filter=%s";
     private SimpleDateFormat lessonTimeFormat = new SimpleDateFormat("hh:mm");
 
-    private long[] lessonsStarts = new long[]{
+    private long[] lessonsStarts = new long[] {
             lessonTimeFormat.parse("8:00:00").getTime(),
             lessonTimeFormat.parse("9:40:00").getTime(),
             lessonTimeFormat.parse("11:30:00").getTime(),
@@ -30,7 +27,8 @@ public class TimetableService {
             lessonTimeFormat.parse("18:10:00").getTime(),
     };
 
-    public TimetableService() throws ParseException { }
+    public TimetableService() throws ParseException {
+    }
 
     private int getCurrentDay() {
         Calendar calendar = Calendar.getInstance();
@@ -42,6 +40,7 @@ public class TimetableService {
         long lessonDuration = 90 * 60000;
         Date now = new Date();
         long timeNow = now.getTime() % (24 * 60 * 60 * 1000L);
+
         for (int i = 0; i < lessonsStarts.length; i++) {
             if (timeNow > lessonsStarts[i] && timeNow < lessonsStarts[i] + lessonDuration) {
                 return i;
@@ -56,31 +55,26 @@ public class TimetableService {
         return (cal.get(Calendar.WEEK_OF_YEAR) + 1) % 2;
     }
 
-    private TimetableResponse getTimetableForUser(String userFIO) throws IOException {
-        URL url = new URL(TIMETABLE_URL + "/api/1.0/timetable?filter=" + URLEncoder.encode(userFIO, "UTF-8"));
-        HttpURLConnection con = (HttpURLConnection) url.openConnection();
-        con.setRequestMethod("GET");
+    private TimetableResponse getTimetableForUser(String userFIO) throws RestClientException {
+        RestTemplate restTemplate = new RestTemplate();
+        return restTemplate.getForObject(String.format(TIMETABLE_URL, userFIO), TimetableResponse.class);
+    }
 
-        BufferedReader in = new BufferedReader(
-                new InputStreamReader(con.getInputStream()));
-        String inputLine;
-        StringBuilder content = new StringBuilder();
-        while ((inputLine = in.readLine()) != null) {
-            content.append(inputLine);
+    public Lesson getCurrentLesson(String userFio)  {
+        TimetableResponse response;
+        try {
+            response = getTimetableForUser(userFio);
+        } catch (RestClientException e) {
+            e.printStackTrace();
+            throw new TimetableClientException(userFio);
         }
-        in.close();
-
-        return new ObjectMapper().readValue(content.toString(), TimetableResponse.class);
-    }
 
-    public Lesson getCurrentLesson(String userFio) throws IOException {
-        TimetableResponse response = getTimetableForUser(userFio);
         int lessonNumber = getCurrentLessonNumber();
         if (lessonNumber < 0) {
             return null;
         }
 
-        List<Object> lessons = response
+        List<Lesson> lessons = response
                 .getResponse()
                 .getWeeks()
                 .get(getCurrentWeek())

src/main/java/ru/ulstu/utils/timetable/errors/TimetableClientException.java

@@ -0,0 +1,7 @@
+package ru.ulstu.utils.timetable.errors;
+
+public class TimetableClientException extends RuntimeException {
+    public TimetableClientException(String message) {
+        super(message);
+    }
+}

src/main/java/ru/ulstu/utils/timetable/model/Day.java

@@ -1,12 +1,13 @@
 package ru.ulstu.utils.timetable.model;
 
+import java.util.ArrayList;
 import java.util.List;
 
 
-public class Day {
+public class Day  {
 
     private Integer day;
-    private List<List<Object>> lessons = null;
+    private List<List<Lesson>> lessons = new ArrayList<>();
 
     public Integer getDay() {
         return day;
@@ -16,11 +17,11 @@ public class Day {
         this.day = day;
     }
 
-    public List<List<Object>> getLessons() {
+    public List<List<Lesson>> getLessons() {
         return lessons;
     }
 
-    public void setLessons(List<List<Object>> lessons) {
+    public void setLessons(List<List<Lesson>> lessons) {
         this.lessons = lessons;
     }
 }

src/main/java/ru/ulstu/utils/timetable/model/Lesson.java

@@ -1,14 +1,11 @@
 package ru.ulstu.utils.timetable.model;
 
-public class Lesson {
+public class Lesson  {
     private String group;
     private String nameOfLesson;
     private String teacher;
     private String room;
 
-    public Lesson() {
-    }
-
     public String getGroup() {
         return group;
     }

src/main/java/ru/ulstu/utils/timetable/model/Response.java

@@ -1,10 +1,11 @@
 package ru.ulstu.utils.timetable.model;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Response {
 
-    private List<Week> weeks = null;
+    private List<Week> weeks = new ArrayList<>();
 
     public List<Week> getWeeks() {
         return weeks;

src/main/java/ru/ulstu/utils/timetable/model/TimetableResponse.java

@@ -1,6 +1,6 @@
 package ru.ulstu.utils.timetable.model;
 
-public class TimetableResponse {
+public class TimetableResponse  {
     private Response response;
     private String error;
 

src/main/java/ru/ulstu/utils/timetable/model/Week.java

@@ -1,10 +1,12 @@
 package ru.ulstu.utils.timetable.model;
 
+import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
 
-public class Week {
+public class Week implements Serializable {
 
-    private List<Day> days = null;
+    private List<Day> days = new ArrayList<>();
 
     public List<Day> getDays() {
         return days;

src/main/resources/application.properties

@@ -24,7 +24,7 @@ spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFact
 # JPA Settings
 spring.datasource.url=jdbc:postgresql://localhost:5432/ng-tracker
 spring.datasource.username=postgres
-spring.datasource.password=postgres
+spring.datasource.password=password
 spring.datasource.driverclassName=org.postgresql.Driver
 spring.jpa.hibernate.ddl-auto=validate
 # Liquibase Settings
@@ -34,6 +34,6 @@ liquibase.change-log=classpath:db/changelog-master.xml
 # Application Settings
 ng-tracker.base-url=http://127.0.0.1:8080
 ng-tracker.undead-user-login=admin
-ng-tracker.dev-mode=true
+ng-tracker.dev-mode=false
 ng-tracker.use-https=false
 ng-tracker.check-run=false

src/main/resources/templates/users/dashboard.html

@@ -3,15 +3,18 @@
       xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
       layout:decorator="default" xmlns:th="http://www.w3.org/1999/xhtml">
 <head>
+    <script src="/js/core.js"></script>
 </head>
 <body>
-
 <div class="container" layout:fragment="content">
     <section id="services">
         <div class="container">
             <div class="col-lg-12 text-center">
                 <h2 class="section-heading text-uppercase">Пользователи</h2>
             </div>
+            <div class="text-center">
+                <h2 th:text="${error}">teste</h2>
+            </div>
             <div class="row justify-content-center" id="dashboard">
                 <th:block th:each="user : ${users}">
                     <div th:replace="users/fragments/userDashboardFragment :: userDashboard(user=${user})"/>
@@ -19,6 +22,14 @@
             </div>
         </div>
     </section>
+    <script th:inline="javascript">
+        /*<![CDATA[*/
+        $(document).ready(function () {
+            var error = /*[[${error}]]*/
+            showFeedbackMessage(error, MessageTypesEnum.WARNING)
+        });
+        /*]]>*/
+    </script>
 </div>
 </body>
 </html>