Removed unused objects

Check for unique logins

.gitignore

@@ -0,0 +1,24 @@
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# Package Files
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# private file with login-data
+application.properties
+
+.idea/
+.gradle/

README.md

@@ -1,2 +1,31 @@
 # VPR-Backend
+This project includes the backend for the VPR-project.
 
+# Installation and Getting Started
+- To run the server you first have to install a MySQL database. 
+> For example MariaDB (https://mariadb.com/downloads/)
+
+- Then you have to create a the database with the "create VPR-DB.sql"-file.
+
+- Create a new user for the db e.g. named "springuser"
+> The database should only be reachable from localhost to improve the security!
+
+- Next create a "application.properties"-file in "vpr/src/main/resources". It should contain following content:
+``` 
+# "update" will automatically get the db-structure
+# It can be "none", "update", "create", or "create-drop", but you have to start with "create" or "update" and should use "none" in production(for security).
+# see https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#configurations-hbmddl for more information.
+spring.jpa.hibernate.ddl-auto=update
+
+# Specify the database address, port and name
+spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/vpr
+
+# Add the login-data
+spring.datasource.username=<USERNAME>
+spring.datasource.password=<PASSWORD>
+
+spring.datasource.driver-class-name =com.mysql.jdbc.Driver
+#spring.jpa.show-sql: true
+``` 
+
+You should now be able to start the application :D

create VPR-DB.sql

@@ -0,0 +1,91 @@
+-- --------------------------------------------------------
+-- Host:                         127.0.0.1
+-- Server Version:               10.6.4-MariaDB - mariadb.org binary distribution
+-- Server Betriebssystem:        Win64
+-- HeidiSQL Version:             11.3.0.6295
+-- --------------------------------------------------------
+
+/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
+/*!40101 SET NAMES utf8 */;
+/*!50503 SET NAMES utf8mb4 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+
+
+-- Exportiere Datenbank Struktur für vpr
+CREATE DATABASE IF NOT EXISTS `vpr` /*!40100 DEFAULT CHARACTER SET utf8mb3 */;
+USE `vpr`;
+
+-- Exportiere Struktur von Tabelle vpr.event
+CREATE TABLE IF NOT EXISTS `event` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(20) NOT NULL DEFAULT '0',
+  `priority` tinyint(2) unsigned NOT NULL DEFAULT 0,
+  `is_full_day` bit(1) NOT NULL DEFAULT b'0',
+  `start` time DEFAULT NULL,
+  `end` time DEFAULT NULL,
+  PRIMARY KEY (`id`) USING BTREE
+) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb3;
+
+-- Exportiere Daten aus Tabelle vpr.event: ~2 rows (ungefähr)
+/*!40000 ALTER TABLE `event` DISABLE KEYS */;
+INSERT INTO `event` (`id`, `name`, `priority`, `is_full_day`, `start`, `end`) VALUES
+	(1, 'TestEvent', 0, b'0', '00:00:00', '00:00:00'),
+	(2, 'Event 2', 1, b'0', NULL, NULL);
+/*!40000 ALTER TABLE `event` ENABLE KEYS */;
+
+-- Exportiere Struktur von Tabelle vpr.event_list
+CREATE TABLE IF NOT EXISTS `event_list` (
+  `id` int(10) NOT NULL AUTO_INCREMENT,
+  `user_id` int(10) unsigned NOT NULL,
+  `event_id` int(10) unsigned NOT NULL,
+  `date` date DEFAULT NULL,
+  PRIMARY KEY (`id`),
+  KEY `UID` (`user_id`) USING BTREE,
+  KEY `EID` (`event_id`) USING BTREE,
+  CONSTRAINT `event_id` FOREIGN KEY (`event_id`) REFERENCES `event` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
+  CONSTRAINT `user_id` FOREIGN KEY (`user_id`) REFERENCES `user` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
+) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8mb3;
+
+-- Exportiere Daten aus Tabelle vpr.event_list: ~2 rows (ungefähr)
+/*!40000 ALTER TABLE `event_list` DISABLE KEYS */;
+INSERT INTO `event_list` (`id`, `user_id`, `event_id`, `date`) VALUES
+	(1, 1, 2, '2021-11-11'),
+	(2, 2, 1, '2021-12-24');
+/*!40000 ALTER TABLE `event_list` ENABLE KEYS */;
+
+-- Exportiere Struktur von Tabelle vpr.hibernate_sequence
+CREATE TABLE IF NOT EXISTS `hibernate_sequence` (
+  `next_val` bigint(20) DEFAULT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3;
+
+-- Exportiere Daten aus Tabelle vpr.hibernate_sequence: ~1 rows (ungefähr)
+/*!40000 ALTER TABLE `hibernate_sequence` DISABLE KEYS */;
+INSERT INTO `hibernate_sequence` (`next_val`) VALUES
+	(3);
+/*!40000 ALTER TABLE `hibernate_sequence` ENABLE KEYS */;
+
+-- Exportiere Struktur von Tabelle vpr.user
+CREATE TABLE IF NOT EXISTS `user` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `name` varchar(20) NOT NULL DEFAULT '0',
+  `forename` varchar(20) NOT NULL DEFAULT '0',
+  `password` varchar(50) NOT NULL DEFAULT '0',
+  `token` varchar(50) DEFAULT '0',
+  `is_admin` bit(1) NOT NULL,
+  PRIMARY KEY (`id`) USING BTREE
+) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb3;
+
+-- Exportiere Daten aus Tabelle vpr.user: ~3 rows (ungefähr)
+/*!40000 ALTER TABLE `user` DISABLE KEYS */;
+INSERT INTO `user` (`id`, `name`, `forename`, `password`, `token`, `is_admin`) VALUES
+	(1, 'Beyer', 'Marc', 'test', 'test', b'1'),
+	(2, 'Kühn', 'Marco', 'test', 'test', b'0'),
+	(3, 'Rechtin', 'Alex', 'test', 'test', b'1');
+/*!40000 ALTER TABLE `user` ENABLE KEYS */;
+
+/*!40101 SET SQL_MODE=IFNULL(@OLD_SQL_MODE, '') */;
+/*!40014 SET FOREIGN_KEY_CHECKS=IFNULL(@OLD_FOREIGN_KEY_CHECKS, 1) */;
+/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
+/*!40111 SET SQL_NOTES=IFNULL(@OLD_SQL_NOTES, 1) */;

server/.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

server/build.gradle

@@ -0,0 +1,29 @@
+plugins {
+	id 'org.springframework.boot' version '2.5.6'
+	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
+	id 'java'
+}
+
+group = 'com.vpr'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '11'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	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/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

server/gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

server/gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

server/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'server'

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

@@ -0,0 +1,13 @@
+ package com.vpr.server;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ServerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ServerApplication.class, args);
+	}
+
+}

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

@@ -0,0 +1,15 @@
+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 +1,252 @@
+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 +1,30 @@
+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 +1,231 @@
+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 +1,48 @@
+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 +1,36 @@
+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 +1,16 @@
+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 +1,11 @@
+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

@@ -0,0 +1,118 @@
+package com.vpr.server.data;
+
+import java.sql.Date;
+import java.sql.Time;
+
+public class DateEvent {
+    private long userId;
+    private String userName;
+    private String userForename;
+
+    private Date date;
+
+    private String name;
+    private Integer priority;
+    private boolean isFullDay;
+    private Time start;
+    private Time end;
+
+    public DateEvent(UserEvent userEvent) {
+        this.userId = userEvent.getUser().getId();
+        this.userName = userEvent.getUser().getName();
+        this.userForename = userEvent.getUser().getForename();
+        this.date = userEvent.getDate();
+        this.name = userEvent.getEvent().getName();
+        this.priority = userEvent.getEvent().getPriority();
+        this.isFullDay = userEvent.getEvent().isFullDay();
+        this.start = userEvent.getEvent().getStart();
+        this.end = userEvent.getEvent().getEnd();
+    }
+
+    public DateEvent(long userId, String userName, String userForename, Date date, String name, Integer priority, boolean isFullDay, Time start, Time end) {
+        this.userId = userId;
+        this.userName = userName;
+        this.userForename = userForename;
+        this.date = date;
+        this.name = name;
+        this.priority = priority;
+        this.isFullDay = isFullDay;
+        this.start = start;
+        this.end = end;
+    }
+
+    /*********************
+     * Getter and Setter *
+     *********************/
+
+    public long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(long userId) {
+        this.userId = userId;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getUserForename() {
+        return userForename;
+    }
+
+    public void setUserForename(String userForename) {
+        this.userForename = userForename;
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    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 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;
+    }
+}

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

@@ -0,0 +1,173 @@
+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

@@ -0,0 +1,146 @@
+package com.vpr.server.data;
+
+import javax.persistence.*;
+import java.util.List;
+
+// @Entity creates a table out of this class with Hibernate
+@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
+    @GeneratedValue(strategy=GenerationType.IDENTITY)
+    private long id;
+
+    @Column(name="name", nullable=false)
+    private String name;
+
+    @Column(name="forename", nullable=false)
+    private String forename;
+
+    @Column(name="login", nullable=false)
+    private String login;
+
+    @Column(name="password", nullable=false)
+    private byte[] password;
+
+    @Column(name="salt", nullable=false)
+    private byte[] salt;
+
+    @Column(name="token")
+    private String token;
+
+    @Column(name="is_admin", nullable=false)
+    private boolean isAdmin;
+
+    @OneToMany(mappedBy = "user")
+    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 String getForename() {
+        return forename;
+    }
+
+    public void setForename(String forename) {
+        this.forename = forename;
+    }
+
+    public String getLogin() {
+        return login;
+    }
+
+    public void setLogin(String login) {
+        this.login = login;
+    }
+
+    public byte[] getPassword() {
+        return 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;
+    }
+
+    public void setToken(String token) {
+        this.token = token;
+    }
+
+    public boolean isAdmin() {
+        return isAdmin;
+    }
+
+    public void setAdmin(boolean admin) {
+        isAdmin = admin;
+    }
+
+    public List<UserEvent> getEventList() {
+        return userEvent;
+    }
+
+    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

@@ -0,0 +1,100 @@
+package com.vpr.server.data;
+
+import javax.persistence.*;
+import java.sql.Date;
+
+// @Entity creates a table out of this class with Hibernate
+// @Table defines the table-name
+@Entity
+@Table(name="user_event")
+@IdClass(UserEventId.class)
+public class UserEvent {
+    @Id
+    @ManyToOne
+    @JoinColumn(name = "user_id", referencedColumnName = "id")
+    private User user;
+
+    @Id
+    @ManyToOne
+    @JoinColumn(name = "event_id", referencedColumnName = "id")
+    private Event event;
+
+    @Id
+    @Column(name="date", columnDefinition = "DATE DEFAULT CURRENT_DATE", nullable = false)
+    private Date date;
+
+    /*********************
+     * Getter and Setter *
+     *********************/
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User user) {
+        this.user = user;
+    }
+
+    public Event getEvent() {
+        return event;
+    }
+
+    public void setEvent(Event event) {
+        this.event = event;
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+
+    // toString
+    @Override
+    public String toString() {
+        return "UserEvent{" +
+                "user=" + user.getId() +
+                ", event=" + event.getId() +
+                ", 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

@@ -0,0 +1,38 @@
+package com.vpr.server.data;
+
+import java.io.Serializable;
+import java.sql.Date;
+
+public class UserEventId implements Serializable {
+    private long user;
+    private long event;
+    private Date date;
+
+    /*********************
+     * Getter and Setter *
+     *********************/
+
+    public long getUser() {
+        return user;
+    }
+
+    public void setUser(long user) {
+        this.user = user;
+    }
+
+    public long getEvent() {
+        return event;
+    }
+
+    public void setEvent(long event) {
+        this.event = event;
+    }
+
+    public Date getDate() {
+        return date;
+    }
+
+    public void setDate(Date date) {
+        this.date = date;
+    }
+}

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

@@ -0,0 +1,79 @@
+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 +1,43 @@
+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 +1,74 @@
+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

@@ -0,0 +1,14 @@
+package com.vpr.server.repository;
+
+import com.vpr.server.data.UserEvent;
+import org.springframework.data.repository.CrudRepository;
+
+import java.sql.Date;
+import java.util.List;
+
+// This will be AUTO IMPLEMENTED by Spring into a Bean called eventListRepository
+// 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

@@ -0,0 +1,25 @@
+package com.vpr.server.repository;
+
+import com.vpr.server.data.User;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.CrudRepository;
+
+// 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 " +
+            "FROM user u",
+            nativeQuery = true)
+    Object[] findAllUsernames();
+
+    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 +1,28 @@
+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 +1,27 @@
+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;
+        }
+    }
+}

server/src/test/java/com/vpr/server/ServerApplicationTests.java

@@ -0,0 +1,13 @@
+package com.vpr.server;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ServerApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}