Merge branch 'merge'

Check for unique logins

server/build.gradle

@@ -17,8 +17,13 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-web'
 	runtimeOnly 'mysql:mysql-connector-java'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+	// JSON web token
+	implementation 'io.jsonwebtoken:jjwt-api:0.11.2'
+	runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.2',
+			'io.jsonwebtoken:jjwt-jackson:0.11.2'
 }
 
 test {
 	useJUnitPlatform()
-}
+}

server/src/main/java/com/vpr/server/Event.java

@@ -1,117 +0,0 @@
-package com.vpr.server;
-
-import javax.persistence.*;
-import java.sql.Time;
-import java.util.List;
-
-// @Entity creates a table out of this class with Hibernate
-@Entity(name = "Event")
-public class Event {
-    // Generate the primary key
-    @Id
-    @GeneratedValue(strategy=GenerationType.IDENTITY)
-    private long id;
-
-    @Column(name="name", nullable=false)
-    private String name;
-
-    @Column(name="priority", nullable=false)
-    private Integer priority;
-
-    @Column(name="is_full_day", nullable=false)
-    private boolean isFullDay;
-
-    @Column(name="is_private", nullable=false)
-    private boolean isPrivate;
-
-    @Column(name="start")
-    private Time start;
-
-    @Column(name="end")
-    private Time end;
-
-    @OneToMany(mappedBy = "event")
-    private List<UserEvent> userEvent;
-
-    /*********************
-     * Getter and Setter *
-     *********************/
-
-    public long getId() {
-        return id;
-    }
-
-    public void setId(long id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Integer getPriority() {
-        return priority;
-    }
-
-    public void setPriority(Integer priority) {
-        this.priority = priority;
-    }
-
-    public boolean isFullDay() {
-        return isFullDay;
-    }
-
-    public void setFullDay(boolean fullDay) {
-        isFullDay = fullDay;
-    }
-
-    public boolean isPrivate() {
-        return isPrivate;
-    }
-
-    public void setPrivate(boolean aPrivate) {
-        isPrivate = aPrivate;
-    }
-
-    public Time getStart() {
-        return start;
-    }
-
-    public void setStart(Time start) {
-        this.start = start;
-    }
-
-    public Time getEnd() {
-        return end;
-    }
-
-    public void setEnd(Time end) {
-        this.end = end;
-    }
-
-    public List<UserEvent> getUserEvent() {
-        return userEvent;
-    }
-
-    public void setUserEvent(List<UserEvent> userEvent) {
-        this.userEvent = userEvent;
-    }
-
-    // toString
-    @Override
-    public String toString() {
-        return "Event{" +
-                "id=" + id +
-                ", name='" + name + '\'' +
-                ", priority=" + priority +
-                ", isFullDay=" + isFullDay +
-                ", start=" + start +
-                ", end=" + end +
-                ", userEvent=" + userEvent +
-                '}';
-    }
-}

server/src/main/java/com/vpr/server/EventRepository.java

@@ -1,32 +0,0 @@
-package com.vpr.server;
-
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.CrudRepository;
-
-import java.util.List;
-
-// This will be AUTO IMPLEMENTED by Spring into a Bean called eventRepository
-// CRUD refers Create, Read, Update, Delete
-
-public interface EventRepository extends CrudRepository<Event, Integer> {
-    @Query(value = "SELECT e.id AS eid, e.name AS ename, e.start, e.end, e.priority , e.is_full_day, " +
-            "ue.date, " +
-            "u.id AS uid, u.forename, u.name AS uname " +
-            "FROM event e " +
-            "INNER JOIN user_event ue " +
-            "ON e.id = ue.event_id " +
-            "INNER JOIN user u " +
-            "ON ue.user_id = u.id " +
-            "WHERE u.id = ?1 " +
-            "OR e.is_private = 0",
-            nativeQuery = true)
-    Object[] findAllVisibleByUserId(long id);
-
-    @Query(value = "SELECT * " +
-            "FROM event e " +
-            "INNER JOIN user_event ue " +
-            "ON e.id = ue.event_id " +
-            "WHERE ue.user_id = ?1",
-            nativeQuery = true)
-    Object[] findAllByUserId(long id);
-}

server/src/main/java/com/vpr/server/MainController.java

@@ -1,134 +0,0 @@
-package com.vpr.server;
-
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.*;
-
-import java.sql.Date;
-import java.sql.Time;
-import java.text.SimpleDateFormat;
-import java.util.Optional;
-
-@Controller // This means that this class is a Controller
-@RequestMapping(path="/vpr") // This means URL's start with /demo (after Application path)
-public class MainController {
-
-    // This means to get the bean called userRepository
-    // Which is auto-generated by Spring, we will use it to handle the data
-    @Autowired
-    private com.vpr.server.UserRepository userRepository;
-
-    @Autowired
-    private EventRepository eventRepository;
-
-    @Autowired
-    private UserEventRepository userEventRepository;
-
-    // POST-request at /add with request parameter
-    // @ResponseBody means the returned String is the response, not a view name
-    @PostMapping(path="/add-user")
-    public @ResponseBody String addNewUser (
-            @RequestParam String name,
-            @RequestParam String forename,
-            @RequestParam String password,
-            @RequestParam String isAdmin
-            ) {
-
-        com.vpr.server.User user = new com.vpr.server.User();
-
-        // TODO set correct token and password
-        user.setName(name);
-        user.setForename(forename);
-        user.setPassword(password);
-        user.setToken("test");
-        user.setAdmin(isAdmin.equals("1"));
-
-        userRepository.save(user);
-        return "Saved";
-    }
-
-    @PostMapping(path="/add-event")
-    public @ResponseBody String addEvent (
-            @RequestParam Integer userId,
-            @RequestParam String date,
-            @RequestParam String name,
-            @RequestParam String start,
-            @RequestParam String end,
-            @RequestParam Integer prority,
-            @RequestParam Boolean isFullDay,
-            @RequestParam Boolean isPrivate
-    ) {
-
-        com.vpr.server.Event event = new com.vpr.server.Event();
-
-        event.setName(name);
-
-        try {
-            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("hh:mm");
-            long ms = simpleDateFormat.parse(start).getTime();
-            event.setStart(new Time(ms));
-        }catch (Exception e){
-            event.setStart(null);
-        }
-
-        try {
-            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("hh:mm");
-            long ms = simpleDateFormat.parse(end).getTime();
-            event.setEnd(new Time(ms));
-        }catch (Exception e){
-            event.setEnd(null);
-        }
-
-        event.setPriority(prority);
-        event.setFullDay(isFullDay);
-        event.setPrivate(isPrivate);
-
-
-        eventRepository.save(event);
-
-
-        com.vpr.server.UserEvent userEvent = new com.vpr.server.UserEvent();
-
-        try {
-            System.out.println("date " + date);
-            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
-            userEvent.setDate(new java.sql.Date(simpleDateFormat.parse(date).getTime()));
-        }catch (Exception e){
-            System.out.println("DATE FORMAT NOT CORRECT");
-        }
-
-        userEvent.setEvent(event);
-
-        long uId = Long.valueOf(userId);
-        User user = userRepository.findById(uId);
-        userEvent.setUser(user);
-
-        System.out.println(userEvent);
-        System.out.println(user);
-
-        userEventRepository.save(userEvent);
-        return "Saved";
-    }
-
-    // GET-request at /all-users
-    // returns JSON-data
-    @GetMapping(path="/all-users")
-    public @ResponseBody Object[] getAllUsers() {
-        return userRepository.findAllUsernames();
-    }
-
-    // POST-request at /all-events
-    // returns JSON-data
-    @PostMapping(path="/all-events")
-    public @ResponseBody Object[] getAllEvents(@RequestParam long userId) {
-        return eventRepository.findAllVisibleByUserId(userId);
-    }
-
-
-    @GetMapping(path="/all-events-test")
-    public @ResponseBody Iterable<com.vpr.server.Event> getAllEventsTest() {
-        return eventRepository.findAll();
-    }
-
-
-}

server/src/main/java/com/vpr/server/ServerApplication.java

@@ -1,4 +1,5 @@
- package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

server/src/main/java/com/vpr/server/controller/AuthController.java

@@ -0,0 +1,16 @@
+//Marco Kühn//
+package com.vpr.server.controller;
+
+import com.vpr.server.data.User;
+import com.vpr.server.repository.UserRepository;
+
+public class AuthController {
+
+    public User getAuthUserFromHeader(String authorizationHeader, UserRepository userRepository){
+        String[] splitAuthHeader = authorizationHeader.split("\\s");
+        if(splitAuthHeader.length == 2){
+            return userRepository.findByToken(splitAuthHeader[1]);
+        }
+        return null;
+    }
+}

server/src/main/java/com/vpr/server/controller/EventController.java

@@ -0,0 +1,253 @@
+//Marc Beyer//
+package com.vpr.server.controller;
+
+import com.vpr.server.dao.interfaces.EventDAO;
+import com.vpr.server.data.Event;
+import com.vpr.server.data.User;
+import com.vpr.server.data.UserEvent;
+import com.vpr.server.json.JSONMapper;
+import com.vpr.server.json.Validator;
+import com.vpr.server.repository.EventRepository;
+import com.vpr.server.repository.UserEventRepository;
+import com.vpr.server.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Date;
+import java.util.List;
+
+@Controller
+@RequestMapping(path = "/event")
+public class EventController {
+    @Autowired
+    private UserRepository userRepository;
+    @Autowired
+    private EventRepository eventRepository;
+    @Autowired
+    private UserEventRepository userEventRepository;
+
+    @Autowired
+    private EventDAO eventDAO;
+
+    /******************
+     * POST-ENDPOINTS *
+     ******************/
+
+    @PostMapping(path = "/add")
+    public @ResponseBody
+    ResponseEntity<String> addEvent(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam long userId,
+            @RequestParam String date,
+            @RequestParam String name,
+            @RequestParam String start,
+            @RequestParam String end,
+            @RequestParam Integer priority,
+            @RequestParam Boolean isFullDay,
+            @RequestParam Boolean isPrivate
+    ) {
+        User authUser = userRepository.findByToken(authorizationHeader.split("\\s")[1]);
+        if (authUser == null || (!authUser.isAdmin() && authUser.getId() != userId)) {
+            return new ResponseEntity<>("Du hast keine Rechte um den Termin zu erstellen", HttpStatus.UNAUTHORIZED);
+        }
+
+        ResponseEntity<String> BAD_REQUEST = createEventAndUserEvent(userId, date, name, start, end, priority, isFullDay, isPrivate);
+        if (BAD_REQUEST != null) return BAD_REQUEST;
+
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+    @PostMapping(path = "/del")
+    public @ResponseBody
+    ResponseEntity<String> delEvent(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam long eventId,
+            @RequestParam long userId,
+            @RequestParam String date
+    ) {
+        User authUser = userRepository.findByToken(authorizationHeader.split("\\s")[1]);
+        if (authUser == null || (!authUser.isAdmin() && authUser.getId() != userId)) {
+            return new ResponseEntity<>("Du hast keine Rechte um den Termin zu löschen", HttpStatus.UNAUTHORIZED);
+        }
+
+        eventRepository.deleteUserEventsById(userId, eventId, date);
+        if (eventDAO.getAllEventsWithId(eventId).size() == 0) {
+            eventRepository.deleteById(eventId);
+        }
+
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+
+    @PostMapping(path = "/all")
+    public @ResponseBody
+    ResponseEntity<String> getAllEvents(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam String startDate,
+            @RequestParam String endDate
+    ) {
+        User authUser = userRepository.findByToken(authorizationHeader.split("\\s")[1]);
+        if (authUser == null) {
+            return new ResponseEntity<>("Bitte erneut einloggen", HttpStatus.UNAUTHORIZED);
+        }
+
+        List<Event> eventList = eventDAO.getAllEventsInTimespan(authUser.getId(), startDate, endDate);
+
+        return new ResponseEntity<>(JSONMapper.eventListToJSON(eventList), HttpStatus.OK);
+    }
+
+
+    @PostMapping(path = "/edit")
+    public @ResponseBody
+    ResponseEntity<String> editEvent(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam Long eventId,
+            @RequestParam Long userId,
+            @RequestParam String date,
+            @RequestParam String newDate,
+            @RequestParam String newName,
+            @RequestParam String newStart,
+            @RequestParam String newEnd,
+            @RequestParam Integer newPriority,
+            @RequestParam Boolean newIsFullDay,
+            @RequestParam Boolean newIsPrivate
+    ) {
+        User authUser = userRepository.findByToken(authorizationHeader.split("\\s")[1]);
+        if (authUser == null || (!authUser.isAdmin() && authUser.getId() != userId)) {
+            return new ResponseEntity<>(
+                    "Du hast keine Rechte um den Termin zu bearbeiten",
+                    HttpStatus.UNAUTHORIZED
+            );
+        }
+
+        List<Event> eventList = eventDAO.getAllEventsWithIdAndDate(userId, eventId, date);
+
+        if (eventList == null || eventList.size() == 0) {
+            return new ResponseEntity<>("Der Termin exestiert nicht in der Datenbank", HttpStatus.BAD_REQUEST);
+        }
+        if (eventList.size() > 1) {
+            return new ResponseEntity<>(
+                    "Der Termin ist doppelt vorhanden. " +
+                            "(Um das zu lösen versuche den Termin zu löschen und erneut zu erstellen)",
+                    HttpStatus.BAD_REQUEST
+            );
+        }
+
+        ResponseEntity<String> error = createEventAndUserEvent(
+                userId,
+                newDate,
+                newName,
+                newStart,
+                newEnd,
+                newPriority,
+                newIsFullDay,
+                newIsPrivate,
+                eventId
+        );
+
+        if (error != null) return error;
+
+        eventRepository.deleteUserEventsById(userId, eventId, date);
+        if (eventDAO.getAllEventsWithId(eventId).size() == 0) {
+            eventRepository.deleteById(eventId);
+        }
+
+
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+    private ResponseEntity<String> createEventAndUserEvent(
+            long userId,
+            String date,
+            String name,
+            String start,
+            String end,
+            Integer priority,
+            Boolean isFullDay,
+            Boolean isPrivate
+    ) {
+        return createEventAndUserEvent(
+                userId,
+                date,
+                name,
+                start,
+                end,
+                priority,
+                isFullDay,
+                isPrivate,
+                -1
+        );
+    }
+
+    private ResponseEntity<String> createEventAndUserEvent(
+            long userId,
+            String date,
+            String name,
+            String start,
+            String end,
+            Integer priority,
+            Boolean isFullDay,
+            Boolean isPrivate,
+            long oldEventId
+    ) {
+        User user = userRepository.findById(userId);
+        if (user == null) {
+            return new ResponseEntity<>("UserId nicht korrekt", HttpStatus.BAD_REQUEST);
+        }
+
+        try {
+            Event event = new Event();
+
+            event.setName(Validator.ValidateEventName(name));
+            event.setStart(Validator.ValidateEventTime(start));
+            event.setEnd(Validator.ValidateEventTime(end));
+            event.setPriority(priority);
+            event.setFullDay(isFullDay);
+            event.setPrivate(isPrivate);
+
+            UserEvent userEvent = new UserEvent();
+
+            userEvent.setDate(Validator.ValidateEventDate(date));
+            userEvent.setEvent(event);
+            userEvent.setUser(user);
+
+            List<UserEvent> userEvents = userEventRepository.findByUserIdAndDate(user.getId(), userEvent.getDate());
+
+            boolean isFullDayButDayHasEvents = event.isFullDay() && userEvents.size() > 0;
+            boolean userEventIsSelf = userEvents.size() == 1 &&
+                    isSelf(userEvent.getDate(), userId, oldEventId, userEvents.get(0));
+
+            if (isFullDayButDayHasEvents && !userEventIsSelf) {
+                return new ResponseEntity<>(
+                        "Es gibt bereits Termine am " + userEvent.getDate(),
+                        HttpStatus.BAD_REQUEST
+                );
+            } else {
+                for (UserEvent ue : userEvents) {
+                    if (ue.getEvent().isFullDay() && !isSelf(userEvent.getDate(), userId, oldEventId, ue)) {
+                        return new ResponseEntity<>(
+                                "Der Tag " + userEvent.getDate() + " ist schon mit '"
+                                        + ue.getEvent().getName() + "' belegt",
+                                HttpStatus.BAD_REQUEST
+                        );
+                    }
+                }
+            }
+
+            eventRepository.save(event);
+            userEventRepository.save(userEvent);
+        } catch (IllegalArgumentException exception) {
+            return new ResponseEntity<>(exception.getMessage(), HttpStatus.BAD_REQUEST);
+        }
+        return null;
+    }
+
+    private boolean isSelf(Date date, long userId, long eventId, UserEvent userEvent){
+        return date.equals(userEvent.getDate()) &&
+                userId == userEvent.getUser().getId() &&
+                eventId == userEvent.getEvent().getId();
+    }
+}

server/src/main/java/com/vpr/server/controller/MainController.java

@@ -0,0 +1,31 @@
+//Marc Beyer//
+package com.vpr.server.controller;
+
+import com.vpr.server.repository.EventRepository;
+import com.vpr.server.repository.UserEventRepository;
+import com.vpr.server.repository.UserRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.server.ResponseStatusException;
+
+@Controller // This means that this class is a Controller
+@RequestMapping(path = "/vpr") // This means URL's start with /demo (after Application path)
+public class MainController {
+
+    @GetMapping(path = "/status-test")
+    public String statusTest(){
+        throw new ResponseStatusException(HttpStatus.I_AM_A_TEAPOT, "TestTestTest");
+    }
+
+    @PostMapping(path = "/header-test")
+    public ResponseEntity<String> headerTest(@RequestHeader("Authorization") String authorizationHeader){
+        System.out.println("authorizationHeader: " + authorizationHeader);
+        return new ResponseEntity<>(authorizationHeader, HttpStatus.OK);
+    }
+}

server/src/main/java/com/vpr/server/controller/UserController.java

@@ -0,0 +1,232 @@
+//Marc Beyer//
+package com.vpr.server.controller;
+
+import com.vpr.server.dao.interfaces.UserDAO;
+import com.vpr.server.data.User;
+import com.vpr.server.json.JSONMapper;
+import com.vpr.server.repository.UserRepository;
+import com.vpr.server.security.Hasher;
+import com.vpr.server.security.Token;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.*;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.InvalidKeySpecException;
+import java.util.Arrays;
+import java.util.List;
+
+@Controller
+@RequestMapping(path = "/user")
+public class UserController {
+    @Autowired
+    private UserRepository userRepository;
+    @Autowired
+    private UserDAO userDAO;
+
+    private final AuthController authController;
+
+    public UserController() {
+        this.authController = new AuthController();
+    }
+
+    /******************
+     * POST-ENDPOINTS *
+     ******************/
+
+    @PostMapping(path = "/add")
+    public @ResponseBody
+    ResponseEntity<String> addNewUser(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam String name,
+            @RequestParam String forename,
+            @RequestParam String login,
+            @RequestParam String password,
+            @RequestParam Boolean isAdmin
+    ) {
+        User authUser = authController.getAuthUserFromHeader(authorizationHeader, userRepository);
+        if (authUser == null || !authUser.isAdmin()) {
+            return new ResponseEntity<>("Du hast keine Rechte um einen User an zu legen", HttpStatus.UNAUTHORIZED);
+        }
+
+        if (userRepository.findByLogin(login) != null) {
+            return new ResponseEntity<>("Login exestiert bereits", HttpStatus.BAD_REQUEST);
+        }
+
+        byte[] salt = Hasher.GenerateSalt();
+        byte[] hash;
+        try {
+            hash = Hasher.HashPassword(password, salt);
+        } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
+            e.printStackTrace();
+            return new ResponseEntity<>("Fehler beim hashen", HttpStatus.INTERNAL_SERVER_ERROR);
+        }
+
+        User user = new User();
+
+        user.setName(name);
+        user.setForename(forename);
+        user.setLogin(login);
+        user.setPassword(hash);
+        user.setSalt(salt);
+        user.setToken("");
+        user.setAdmin(isAdmin);
+
+        userRepository.save(user);
+        return new ResponseEntity<>("" + user.getId(), HttpStatus.OK);
+    }
+
+    @PostMapping(path = "/login")
+    public @ResponseBody
+    ResponseEntity<String> login(
+            @RequestParam String login,
+            @RequestParam String password
+    ) {
+        if(userRepository.findAllUsernames().length == 0){
+            byte[] salt = Hasher.GenerateSalt();
+            byte[] hash;
+            try {
+                hash = Hasher.HashPassword(password, salt);
+            } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
+                e.printStackTrace();
+                return new ResponseEntity<>("Fehler beim hashen", HttpStatus.INTERNAL_SERVER_ERROR);
+            }
+
+            User user = new User();
+            user.setName("Admin");
+            user.setForename(login);
+            user.setLogin(login);
+            user.setPassword(hash);
+            user.setSalt(salt);
+            user.setToken("");
+            user.setAdmin(true);
+
+            userRepository.save(user);
+        }
+        System.out.println(login + " tries to login.");
+        User user = userRepository.findByLogin(login);
+        if (user == null) {
+            System.out.println("Login for " + login + " failed.");
+            return new ResponseEntity<>("Falscher login", HttpStatus.UNAUTHORIZED);
+        }
+
+        byte[] salt = user.getSalt();
+        byte[] hash;
+        try {
+            hash = Hasher.HashPassword(password, salt);
+        } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
+            e.printStackTrace();
+            return new ResponseEntity<>("Fehler beim hashen", HttpStatus.INTERNAL_SERVER_ERROR);
+        }
+
+        if (Arrays.equals(user.getPassword(), hash)) {
+            String token = Token.Generate(user.getLogin());
+            user.setToken(token);
+            userRepository.save(user);
+
+            System.out.println(user.getLogin() + " is now logged in.");
+            System.out.println(Token.Verify(Token.Generate(user.getLogin()), user.getLogin()));
+
+            return new ResponseEntity<>(token + " " + user.getId(), HttpStatus.OK);
+        }
+        System.out.println(user.getLogin() + " failed to logged in.");
+        System.out.println("entered : " + javax.xml.bind.DatatypeConverter.printHexBinary(hash));
+        System.out.println("required: " + javax.xml.bind.DatatypeConverter.printHexBinary(user.getPassword()));
+
+        return new ResponseEntity<>("Falscher login", HttpStatus.UNAUTHORIZED);
+    }
+
+    @PostMapping(path = "/login-with-token")
+    public @ResponseBody
+    ResponseEntity<String> loginWithToken(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam long userId
+    ) {
+        User authUser = authController.getAuthUserFromHeader(authorizationHeader, userRepository);
+        if (authUser == null || authUser.getId() != userId) {
+            return new ResponseEntity<>("Falscher auth-token", HttpStatus.UNAUTHORIZED);
+        }
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+    @PostMapping(path = "/del")
+    public @ResponseBody
+    ResponseEntity<String> deleteUser(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam long userId
+    ) {
+        User authUser = authController.getAuthUserFromHeader(authorizationHeader, userRepository);
+        if (authUser == null || !authUser.isAdmin()) {
+            return new ResponseEntity<>("Du hast keine Rechte um den User zu löschen", HttpStatus.UNAUTHORIZED);
+        }
+        User user = userRepository.findById(userId);
+        if (user == null) {
+            return new ResponseEntity<>("User nicht in der Datenbank vorhanden", HttpStatus.BAD_REQUEST);
+        }
+        if(!userDAO.deleteAllUserEvents(user.getId())){
+            return new ResponseEntity<>("User konnte nicht gelöscht werden", HttpStatus.INTERNAL_SERVER_ERROR);
+        }
+        userRepository.delete(user);
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+    @PostMapping(path = "/edit")
+    public @ResponseBody ResponseEntity<String> editUser(
+            @RequestHeader("Authorization") String authorizationHeader,
+            @RequestParam long userId,
+            @RequestParam String name,
+            @RequestParam String forename,
+            @RequestParam String login,
+            @RequestParam(required = false) String password,
+            @RequestParam Boolean isAdmin
+    ) {
+        User authUser = authController.getAuthUserFromHeader(authorizationHeader, userRepository);
+        if (authUser == null || (!authUser.isAdmin() && authUser.getId() != userId)) {
+            return new ResponseEntity<>("Du hast keine Rechte um den User zu editieren", HttpStatus.UNAUTHORIZED);
+        }
+        if(isAdmin && !authUser.isAdmin()){
+            return new ResponseEntity<>("Du hast keine Rechte um dich zum Admin zu machen", HttpStatus.UNAUTHORIZED);
+        }
+        User user = userRepository.findById(userId);
+        if (user == null) {
+            return new ResponseEntity<>("User nicht in der Datenbank vorhanden", HttpStatus.BAD_REQUEST);
+        }
+
+        User userWithLogin = userRepository.findByLogin(login);
+        if (userWithLogin != null && userWithLogin.getId() != userId) {
+            return new ResponseEntity<>("Login exestiert bereits", HttpStatus.BAD_REQUEST);
+        }
+
+        if(password != null){
+            byte[] salt = Hasher.GenerateSalt();
+            byte[] hash;
+            try {
+                hash = Hasher.HashPassword(password, salt);
+                user.setPassword(hash);
+                user.setSalt(salt);
+            } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
+                e.printStackTrace();
+                return new ResponseEntity<>("Fehler beim hashen", HttpStatus.INTERNAL_SERVER_ERROR);
+            }
+        }
+
+        user.setName(name);
+        user.setForename(forename);
+        user.setLogin(login);
+        user.setToken("");
+        user.setAdmin(isAdmin);
+
+        userRepository.save(user);
+        return new ResponseEntity<>("", HttpStatus.OK);
+    }
+
+    @PostMapping(path = "/all")
+    public @ResponseBody
+    ResponseEntity<String> getAllUser() {
+        List<User> userList = userDAO.getAllUser();
+
+        return new ResponseEntity<>(JSONMapper.userListToJSON(userList), HttpStatus.OK);
+    }
+}

server/src/main/java/com/vpr/server/dao/implementation/EventDAOImplementation.java

@@ -0,0 +1,49 @@
+//Marc Beyer//
+package com.vpr.server.dao.implementation;
+
+import com.vpr.server.dao.interfaces.EventDAO;
+import com.vpr.server.data.Event;
+import org.springframework.stereotype.Repository;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.transaction.Transactional;
+import java.util.List;
+
+@Repository
+@Transactional
+public class EventDAOImplementation implements EventDAO {
+
+    @PersistenceContext
+    private EntityManager manager;
+
+    @Override
+    public List<Event> getAllEvents() {
+        return manager.createNamedQuery("getAllEvents", Event.class).getResultList();
+    }
+
+    @Override
+    public List<Event> getAllEventsWithId(long eventId) {
+        return manager.createNamedQuery("getAllEventsWithId", Event.class)
+                .setParameter("eventId", eventId)
+                .getResultList();
+    }
+
+    @Override
+    public List<Event> getAllEventsInTimespan(long userId, String startDate, String endDate) {
+        return manager.createNamedQuery("getAllEventsInTimespan", Event.class)
+                .setParameter("userId", userId)
+                .setParameter("startDate", startDate)
+                .setParameter("endDate", endDate)
+                .getResultList();
+    }
+
+    @Override
+    public List<Event> getAllEventsWithIdAndDate(long userId, long eventId, String date) {
+        return manager.createNamedQuery("getAllEventsWithIdAndDate", Event.class)
+                .setParameter("userId", userId)
+                .setParameter("eventId", eventId)
+                .setParameter("date", date)
+                .getResultList();
+    }
+}

server/src/main/java/com/vpr/server/dao/implementation/UserDAOImplementation.java

@@ -0,0 +1,37 @@
+//Marc Beyer//
+package com.vpr.server.dao.implementation;
+
+import com.vpr.server.dao.interfaces.UserDAO;
+import com.vpr.server.data.User;
+import org.springframework.stereotype.Repository;
+
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import javax.transaction.Transactional;
+import java.util.List;
+
+@Repository
+@Transactional
+public class UserDAOImplementation implements UserDAO {
+
+    @PersistenceContext
+    private EntityManager manager;
+
+    @Override
+    public List<User> getAllUser() {
+        return manager.createNamedQuery("getAllUser", User.class).getResultList();
+    }
+
+    @Override
+    public boolean deleteAllUserEvents(long userId) {
+        try {
+            manager.createNamedQuery("deleteAllUserEvents", User.class)
+                    .setParameter("userId", userId)
+                    .executeUpdate();
+
+            return true;
+        }catch (Exception e){
+            return false;
+        }
+    }
+}

server/src/main/java/com/vpr/server/dao/interfaces/EventDAO.java

@@ -0,0 +1,17 @@
+//Marc Beyer//
+package com.vpr.server.dao.interfaces;
+
+import com.vpr.server.data.Event;
+
+import java.util.List;
+
+public interface EventDAO {
+
+    List<Event> getAllEvents();
+
+    List<Event> getAllEventsInTimespan(long userId, String startDate, String endDate);
+
+    List<Event> getAllEventsWithIdAndDate(long userId, long eventId, String date);
+
+    List<Event> getAllEventsWithId(long eventId);
+}

server/src/main/java/com/vpr/server/dao/interfaces/UserDAO.java

@@ -0,0 +1,12 @@
+//Marc Beyer//
+package com.vpr.server.dao.interfaces;
+
+import com.vpr.server.data.User;
+
+import java.util.List;
+
+public interface UserDAO {
+    List<User> getAllUser();
+
+    boolean deleteAllUserEvents(long userId);
+}

server/src/main/java/com/vpr/server/data/DateEvent.java

@@ -1,4 +1,5 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.data;
 
 import java.sql.Date;
 import java.sql.Time;

server/src/main/java/com/vpr/server/data/Event.java

@@ -0,0 +1,174 @@
+//Marc Beyer//
+package com.vpr.server.data;
+
+import javax.persistence.*;
+import java.io.Serializable;
+import java.sql.Time;
+import java.util.List;
+
+@Entity(name = "Event") // @Entity creates a table out of this class with Hibernate
+@Table(name = "event")
+@NamedNativeQueries({
+    @NamedNativeQuery(
+        name = "getAllEvents",
+        query = "SELECT * FROM event",
+        resultClass = Event.class
+    ),
+    @NamedNativeQuery(
+            name = "getAllEventsInTimespan",
+            query = "SELECT * " +
+                    "FROM event e " +
+                    "INNER JOIN user_event ue " +
+                    "ON e.id = ue.event_id " +
+                    "WHERE (ue.user_id = :userId OR e.is_private = 0) " +
+                    "AND ue.date >= :startDate " +
+                    "AND ue.date < :endDate " +
+                    "ORDER BY ue.date, e.priority DESC, e.start",
+            resultClass = Event.class
+    ),
+    @NamedNativeQuery(
+            name = "getAllEventsWithIdAndDate",
+            query = "SELECT * " +
+                    "FROM event e " +
+                    "INNER JOIN user_event ue " +
+                    "ON e.id = ue.event_id " +
+                    "WHERE ue.user_id = :userId " +
+                    "AND ue.event_id = :eventId " +
+                    "AND ue.date = :date",
+            resultClass = Event.class
+    ),
+    @NamedNativeQuery(
+            name = "getAllEventsWithId",
+            query = "SELECT * " +
+                    "FROM event e " +
+                    "INNER JOIN user_event ue " +
+                    "ON e.id = ue.event_id " +
+                    "WHERE ue.event_id = :eventId",
+            resultClass = Event.class
+    )
+})
+public class Event implements Serializable {
+    // Generate the primary key
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private long id;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+
+    @Column(name = "priority", nullable = false)
+    private Integer priority;
+
+    @Column(name = "is_full_day", nullable = false)
+    private boolean isFullDay;
+
+    @Column(name = "is_private", nullable = false)
+    private boolean isPrivate;
+
+    @Column(name = "start")
+    private Time start;
+
+    @Column(name = "end")
+    private Time end;
+
+    @OneToMany(mappedBy = "event")
+    private List<UserEvent> userEvent;
+
+    /*********************
+     * Getter and Setter *
+     *********************/
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getPriority() {
+        return priority;
+    }
+
+    public void setPriority(Integer priority) {
+        this.priority = priority;
+    }
+
+    public boolean isFullDay() {
+        return isFullDay;
+    }
+
+    public void setFullDay(boolean fullDay) {
+        isFullDay = fullDay;
+    }
+
+    public boolean isPrivate() {
+        return isPrivate;
+    }
+
+    public void setPrivate(boolean aPrivate) {
+        isPrivate = aPrivate;
+    }
+
+    public Time getStart() {
+        return start;
+    }
+
+    public void setStart(Time start) {
+        this.start = start;
+    }
+
+    public Time getEnd() {
+        return end;
+    }
+
+    public void setEnd(Time end) {
+        this.end = end;
+    }
+
+    public List<UserEvent> getUserEvent() {
+        return userEvent;
+    }
+
+    public void setUserEvent(List<UserEvent> userEvent) {
+        this.userEvent = userEvent;
+    }
+
+    // toString
+    @Override
+    public String toString() {
+        return "Event{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", priority=" + priority +
+                ", isFullDay=" + isFullDay +
+                ", start=" + start +
+                ", end=" + end +
+                ", userEvent=" + userEvent +
+                '}';
+    }
+
+    @Override
+    public boolean equals(Object obj){
+        if(!(obj instanceof Event)){
+            return false;
+        }
+
+        Event event = (Event) obj;
+        System.out.println(event.getId() + " " + getId());
+        return event.getId() == getId();
+    }
+
+    @Override
+    public int hashCode(){
+        return (int)getId();
+    }
+}

server/src/main/java/com/vpr/server/data/User.java

@@ -1,10 +1,29 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.data;
 
 import javax.persistence.*;
 import java.util.List;
 
 // @Entity creates a table out of this class with Hibernate
-@Entity
+@Entity(name = "User")
+@Table(name = "user")
+
+@SqlResultSetMapping(name="deleteResult", columns = {
+        @ColumnResult(name = "count")
+})
+
+@NamedNativeQueries({
+    @NamedNativeQuery(
+        name = "getAllUser",
+        query = "SELECT * FROM user",
+        resultClass = User.class
+    ),
+    @NamedNativeQuery(
+        name = "deleteAllUserEvents",
+        query = "DELETE FROM user_event WHERE user_id = :userId",
+            resultSetMapping = "deleteResult"
+    )
+})
 public class User {
     // Generate the primary key
     @Id
@@ -17,8 +36,14 @@ public class User {
     @Column(name="forename", nullable=false)
     private String forename;
 
+    @Column(name="login", nullable=false)
+    private String login;
+
     @Column(name="password", nullable=false)
-    private String password;
+    private byte[] password;
+
+    @Column(name="salt", nullable=false)
+    private byte[] salt;
 
     @Column(name="token")
     private String token;
@@ -57,14 +82,30 @@ public class User {
         this.forename = forename;
     }
 
-    public String getPassword() {
+    public String getLogin() {
+        return login;
+    }
+
+    public void setLogin(String login) {
+        this.login = login;
+    }
+
+    public byte[] getPassword() {
         return password;
     }
 
-    public void setPassword(String password) {
+    public void setPassword(byte[] password) {
         this.password = password;
     }
 
+    public byte[] getSalt() {
+        return salt;
+    }
+
+    public void setSalt(byte[] salt) {
+        this.salt = salt;
+    }
+
     public String getToken() {
         return token;
     }
@@ -88,4 +129,19 @@ public class User {
     public void setEventList(List<UserEvent> userEvent) {
         this.userEvent = userEvent;
     }
+
+    @Override
+    public boolean equals(Object obj){
+        if(!(obj instanceof User)){
+            return false;
+        }
+
+        User user = (User) obj;
+        return user.getId() == getId();
+    }
+
+    @Override
+    public int hashCode(){
+        return (int)getId();
+    }
 }

server/src/main/java/com/vpr/server/data/UserEvent.java

@@ -1,8 +1,8 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.data;
 
 import javax.persistence.*;
 import java.sql.Date;
-import java.util.List;
 
 // @Entity creates a table out of this class with Hibernate
 // @Table defines the table-name
@@ -61,4 +61,41 @@ public class UserEvent {
                 ", date=" + date +
                 '}';
     }
-}
+
+    @Override
+    public boolean equals(Object obj){
+        System.out.println("equals");
+        if(!(obj instanceof UserEvent)){
+            System.out.println("not an userevent");
+            return false;
+        }
+
+        UserEvent userEvent = (UserEvent) obj;
+
+        System.out.println("date " + userEvent.getDate().equals(getDate()));
+        System.out.println("user " + userEvent.getUser().equals(getUser()));
+        System.out.println("event " + userEvent.getEvent().equals(getEvent()));
+
+        return userEvent.getDate().equals(getDate()) &&
+                userEvent.getUser().equals(getUser()) &&
+                userEvent.getEvent().equals(getEvent());
+    }
+
+    @Override
+    public int hashCode(){
+        long hash = getUser().hashCode() +
+                getEvent().hashCode() +
+                getDate().hashCode();
+
+        return (int)hash;
+    }
+}
+
+
+
+
+
+
+
+
+

server/src/main/java/com/vpr/server/data/UserEventId.java

@@ -1,4 +1,5 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.data;
 
 import java.io.Serializable;
 import java.sql.Date;

server/src/main/java/com/vpr/server/json/JSONMapper.java

@@ -0,0 +1,80 @@
+//Marco Kühn//
+package com.vpr.server.json;
+
+import com.vpr.server.data.Event;
+import com.vpr.server.data.User;
+import com.vpr.server.data.UserEvent;
+
+import java.sql.Time;
+import java.util.ArrayList;
+import java.util.List;
+
+public class JSONMapper {
+
+    public static String userToJSON(User user) {
+        return "{" +
+                "\"userId\": " + user.getId() + ", " +
+                "\"forename\": \"" + user.getForename() + "\", " +
+                "\"name\": \"" + user.getName() + "\", " +
+                "\"login\": \"" + user.getLogin() + "\"," +
+                "\"admin\": " + user.isAdmin() +
+                "}";
+    }
+
+    public static String userListToJSON(List<User> userList) {
+        StringBuilder userListJSON = new StringBuilder();
+        for (User user : userList) {
+            userListJSON.append(", ");
+            userListJSON.append(userToJSON(user));
+        }
+        userListJSON.delete(0, 2);
+
+        return "[" + userListJSON + "]";
+    }
+
+    public static List<String> eventToJSON(Event event) {
+        List<String> eventListJSON = new ArrayList<>();
+
+        for (UserEvent userEvent : event.getUserEvent()) {
+
+            String eventJSON = "{" +
+                    "\"ownerId\": " + userEvent.getUser().getId() + ", " +
+                    "\"ownerName\": \"" + userEvent.getUser().getForename() + " " + userEvent.getUser().getName() + "\", " +
+                    "\"date\": \"" + userEvent.getDate() + "\", " +
+                    "\"id\": " + event.getId() + "," +
+                    "\"name\": \"" + event.getName() + "\"," +
+                    "\"priority\": " + event.getPriority() + "," +
+                    "\"fullDay\": " + event.isFullDay() + "," +
+                    "\"private\": " + event.isPrivate() + "," +
+                    "\"start\": " + timeToJSON(event.getStart()) + "," +
+                    "\"end\": " + timeToJSON(event.getEnd()) +
+                    "}";
+
+            eventListJSON.add(eventJSON);
+        }
+
+        return eventListJSON;
+    }
+
+    public static String eventListToJSON(List<Event> eventList) {
+        StringBuilder eventListJSON = new StringBuilder();
+        for (Event event : eventList) {
+            List<String> eventsJSON = eventToJSON(event);
+            for (String eventJSON : eventsJSON) {
+                eventListJSON.append(", ");
+                eventListJSON.append(eventJSON);
+            }
+        }
+        eventListJSON.delete(0, 2);
+
+        return "[" + eventListJSON + "]";
+    }
+
+    public static String timeToJSON(Time time) {
+        if (time == null) {
+            return "null";
+        }
+
+        return "\"" + time + "\"";
+    }
+}

server/src/main/java/com/vpr/server/json/Validator.java

@@ -0,0 +1,44 @@
+//Marc Beyer//
+package com.vpr.server.json;
+
+import java.sql.Date;
+import java.sql.Time;
+import java.text.SimpleDateFormat;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Validator {
+    public static String ValidateEventName(String name) throws IllegalArgumentException {
+        if (name.length() < 3) {
+            System.out.println("NAME TO SHORT");
+            throw new IllegalArgumentException("Der Name ist zu kurz");
+        }
+        Pattern pattern = Pattern.compile("[A-Za-z\u00e4\u00f6\u00fc\u00c4\u00d6\u00dc\u00df0-9 =!?+*/$.:,;_<>()-]*");
+        Matcher matcher = pattern.matcher(name);
+        if(!matcher.matches()){
+            System.out.println("NAME HAS ILLEGALCHARS");
+            throw new IllegalArgumentException("Der Name enthält nicht erlaubte Zeichen");
+        }
+        return name;
+    }
+
+    public static Time ValidateEventTime(String time) throws IllegalArgumentException {
+        try {
+            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("hh:mm");
+            long ms = simpleDateFormat.parse(time).getTime();
+            return new Time(ms);
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public static Date ValidateEventDate(String date) throws IllegalArgumentException {
+        try {
+            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
+            return new Date(simpleDateFormat.parse(date).getTime());
+        } catch (Exception e) {
+            System.out.println("DATE FORMAT NOT CORRECT");
+            throw new IllegalArgumentException("Datumformat nicht korrekt");
+        }
+    }
+}

server/src/main/java/com/vpr/server/repository/EventRepository.java

@@ -0,0 +1,75 @@
+//Marc Beyer//
+package com.vpr.server.repository;
+
+import com.vpr.server.data.Event;
+import org.springframework.data.jpa.repository.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+
+import javax.transaction.Transactional;
+
+// This will be AUTO IMPLEMENTED by Spring into a Bean called eventRepository
+// CRUD refers Create, Read, Update, Delete
+
+public interface EventRepository extends CrudRepository<Event, Integer> {
+    @Query(
+            value = "SELECT e.id AS eid, e.name AS ename, e.start, e.end, e.priority , e.is_full_day, " +
+            "ue.date, " +
+            "u.id AS uid, u.forename, u.name AS uname " +
+            "FROM event e " +
+            "INNER JOIN user_event ue " +
+            "ON e.id = ue.event_id " +
+            "INNER JOIN user u " +
+            "ON ue.user_id = u.id " +
+            "WHERE u.id = ?1 " +
+            "OR e.is_private = 0",
+            nativeQuery = true
+    )
+    Object[] findAllVisibleByUserId(long id);
+
+    @Query(
+            value = "SELECT * " +
+            "FROM event e " +
+            "INNER JOIN user_event ue " +
+            "ON e.id = ue.event_id " +
+            "WHERE ue.user_id = ?1",
+            nativeQuery = true
+    )
+    Object[] findAllByUserId(long id);
+
+
+    @Query(
+            value = "SELECT ue.user_id as userId, ue.event_id as eventId, ue.date as date " +
+                    "FROM event e " +
+                    "INNER JOIN user_event ue " +
+                    "ON e.id = ue.event_id " +
+                    "WHERE ue.event_id = ?1 " +
+                    "AND ue.user_id = ?2 " +
+                    "AND ue.date = ?3",
+            nativeQuery = true
+    )
+    UserEventInterface findUserEventByEventIdUserIdAndDate(long eventId, long userId, String date);
+
+    interface UserEventInterface{
+        long getEventId();
+        long getUserId();
+        long getDate();
+    }
+
+    @Modifying
+    @Transactional
+    @Query(
+            value = "DELETE ue FROM user_event ue WHERE ue.event_id = :eventId AND ue.user_id = :userId AND ue.date = :date",
+            nativeQuery = true
+    )
+    void deleteUserEventsById(long userId, long eventId, String date);
+
+
+    @Modifying
+    @Transactional
+    @Query(
+            value = "DELETE e FROM event e WHERE e.id = ?1",
+            nativeQuery = true
+    )
+    void deleteById(long id);
+}

server/src/main/java/com/vpr/server/repository/UserEventRepository.java

@@ -1,6 +1,7 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.repository;
 
-import org.springframework.data.jpa.repository.Query;
+import com.vpr.server.data.UserEvent;
 import org.springframework.data.repository.CrudRepository;
 
 import java.sql.Date;
@@ -10,5 +11,5 @@ import java.util.List;
 // CRUD refers Create, Read, Update, Delete
 
 public interface UserEventRepository extends CrudRepository<UserEvent, Integer> {
-
+    List<UserEvent> findByUserIdAndDate(long userId, Date date);
 }

server/src/main/java/com/vpr/server/repository/UserRepository.java

@@ -1,13 +1,12 @@
-package com.vpr.server;
+//Marc Beyer//
+package com.vpr.server.repository;
 
+import com.vpr.server.data.User;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 
-import java.util.List;
-
 // This will be AUTO IMPLEMENTED by Spring into a Bean called userRepository
 // CRUD refers Create, Read, Update, Delete
-
 public interface UserRepository extends CrudRepository<User, Integer> {
 
     @Query(value = "SELECT u.id, u.name, u.forename " +
@@ -15,5 +14,13 @@ public interface UserRepository extends CrudRepository<User, Integer> {
             nativeQuery = true)
     Object[] findAllUsernames();
 
-    com.vpr.server.User findById(long id);
+    User findById(long id);
+
+    User findByLogin(String login);
+
+    User findByLoginAndPassword(String login, byte[] password);
+
+    void deleteById(long id);
+
+    User findByToken(String token);
 }

server/src/main/java/com/vpr/server/security/Hasher.java

@@ -0,0 +1,29 @@
+//Marc Beyer//
+package com.vpr.server.security;
+
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+
+public class Hasher {
+
+    public static byte[] HashPassword(String password, byte[] salt) throws NoSuchAlgorithmException, InvalidKeySpecException {
+        // Credit: https://www.baeldung.com/java-password-hashing
+        // Generate hash with PBKDF2
+        KeySpec spec = new PBEKeySpec(password.toCharArray(), salt, 65536, 128);
+        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
+        return factory.generateSecret(spec).getEncoded();
+    }
+
+    public static byte[] GenerateSalt(){
+        // Credit: https://www.baeldung.com/java-password-hashing
+        // Create a salt
+        SecureRandom random = new SecureRandom();
+        byte[] salt = new byte[16];
+        random.nextBytes(salt);
+        return salt;
+    }
+}

server/src/main/java/com/vpr/server/security/Token.java

@@ -0,0 +1,28 @@
+//Marc Beyer//
+package com.vpr.server.security;
+
+import io.jsonwebtoken.JwtException;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.SignatureAlgorithm;
+import io.jsonwebtoken.security.Keys;
+
+import java.security.Key;
+
+public class Token {
+
+    private static final Key KEY = Keys.secretKeyFor(SignatureAlgorithm.HS256);
+
+    public static String Generate(String subject){
+        return Jwts.builder().setSubject(subject).signWith(KEY).compact();
+    }
+
+    public static boolean Verify(String jws, String subject){
+        try {
+            assert Jwts.parserBuilder().setSigningKey(KEY).build().parseClaimsJws(jws)
+                    .getBody().getSubject().equals(subject);
+            return true;
+        } catch (JwtException e) {
+            return false;
+        }
+    }
+}