Add project

.gitignore

+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/

build.gradle

+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '2.7.13'
+	id 'io.spring.dependency-management' version '1.0.15.RELEASE'
+}
+
+group = 'com.paysafe'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '17'
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter-validation'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-jdbc'
+	implementation 'com.mysql:mysql-connector-j:8.0.33'
+	// https://mvnrepository.com/artifact/org.springframework.security/spring-security-crypto
+	implementation 'org.springframework.security:spring-security-crypto:5.7.1'
+
+
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

+#!/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/HEAD/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
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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 $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$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
+
+
+# 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"'
+
+# 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 "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# 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 "$JAVACMD" "$@"

gradlew.bat

+@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=.
+@rem This is normally unused
+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% equ 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% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

+rootProject.name = 'shopping-basket'

src/main/java/com/paysafe/shoppingbasket/ShoppingBasketApplication.java

+package com.paysafe.shoppingbasket;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ShoppingBasketApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ShoppingBasketApplication.class, args);
+	}
+
+}

src/main/java/com/paysafe/shoppingbasket/config/EncoderConfiguration.java

+package com.paysafe.shoppingbasket.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.crypto.password.Pbkdf2PasswordEncoder;
+
+@Configuration
+public class EncoderConfiguration {
+
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+}

src/main/java/com/paysafe/shoppingbasket/controllers/AuthenticationController.java

+package com.paysafe.shoppingbasket.controllers;
+
+import com.paysafe.shoppingbasket.models.current_user.CurrentUser;
+import com.paysafe.shoppingbasket.models.dtos.UserAuthDto;
+import com.paysafe.shoppingbasket.services.AuthenticationService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/auth")
+public class AuthenticationController {
+
+    private final static ResponseEntity<String> invalidFieldsResponse = new ResponseEntity<>(
+            "Username and password must be between 5 and 20 symbols",
+            HttpStatus.BAD_REQUEST);
+    private final static ResponseEntity<String> loggedInUserResponse = new ResponseEntity<>(
+            "There is a logged in user",
+            HttpStatus.BAD_REQUEST);
+
+    private final AuthenticationService authenticationService;
+
+    private final CurrentUser currentUser;
+
+    @Autowired
+    public AuthenticationController(AuthenticationService authenticationService, CurrentUser currentUser) {
+        this.authenticationService = authenticationService;
+        this.currentUser = currentUser;
+    }
+
+    @PostMapping("/register")
+    public ResponseEntity<String> registerUser(@RequestBody @Validated UserAuthDto userAuthDto,
+                                               BindingResult bindingResult) {
+
+        if (currentUser.isLoggedIn()) {
+            return loggedInUserResponse;
+        }
+
+        if (bindingResult.hasErrors()) {
+            return invalidFieldsResponse;
+        }
+
+        boolean successful = this.authenticationService.register(userAuthDto);
+
+        if (!successful) {
+            return new ResponseEntity<>("A user with this username already exists",
+                    HttpStatus.CONFLICT);
+        }
+
+        return new ResponseEntity<>(HttpStatus.CREATED);
+    }
+
+    @PostMapping("/login")
+    public ResponseEntity<String> logInUser(@RequestBody @Validated UserAuthDto userAuthDto,
+                                            BindingResult bindingResult) {
+
+        if (currentUser.isLoggedIn()) {
+            return loggedInUserResponse;
+        }
+
+        if (bindingResult.hasErrors()) {
+            return invalidFieldsResponse;
+        }
+
+        boolean successful = this.authenticationService.logIn(userAuthDto);
+        if (!successful) {
+            return new ResponseEntity<>("Username and password don't match.", HttpStatus.BAD_REQUEST);
+        }
+
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
+    @PostMapping("/logout")
+    public ResponseEntity<?> logOutUser() {
+        if (currentUser.isLoggedIn()) {
+            this.authenticationService.logOut();
+        }
+
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+
+    }

src/main/java/com/paysafe/shoppingbasket/controllers/BalanceController.java

+package com.paysafe.shoppingbasket.controllers;
+
+import com.paysafe.shoppingbasket.models.current_user.CurrentUser;
+import com.paysafe.shoppingbasket.models.dtos.DepositFunds;
+import com.paysafe.shoppingbasket.services.BalanceService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.constraints.Positive;
+
+@RestController
+@RequestMapping("/balance")
+public class BalanceController {
+
+    private final CurrentUser currentUser;
+    private final BalanceService balanceService;
+
+    public BalanceController(CurrentUser currentUser, BalanceService balanceService) {
+        this.currentUser = currentUser;
+        this.balanceService = balanceService;
+    }
+
+    @GetMapping
+    public ResponseEntity<Double> checkBalance() {
+        if (!this.currentUser.isLoggedIn()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        double balance = this.balanceService.getBalance(currentUser.getId());
+
+        return new ResponseEntity<>(balance, HttpStatus.OK);
+    }
+
+    @PostMapping
+    public ResponseEntity<Double> depositFunds(@RequestBody @Validated DepositFunds depositFunds,
+                                               BindingResult bindingResult) {
+        if (!this.currentUser.isLoggedIn()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        if (bindingResult.hasErrors()) {
+            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+        }
+
+        double totalBalance = this.balanceService.addFunds(this.currentUser.getId(), depositFunds.getFunds());
+
+        return new ResponseEntity<>(totalBalance, HttpStatus.OK);
+    }
+}

src/main/java/com/paysafe/shoppingbasket/controllers/BasketController.java

+package com.paysafe.shoppingbasket.controllers;
+
+import com.paysafe.shoppingbasket.models.current_user.CurrentUser;
+import com.paysafe.shoppingbasket.models.dtos.BasketDto;
+import com.paysafe.shoppingbasket.services.BasketHandleService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.constraints.Min;
+
+@RestController
+@RequestMapping("/basket")
+public class BasketController {
+
+    private final CurrentUser currentUser;
+    private final BasketHandleService basketHandleService;
+
+    public BasketController(CurrentUser currentUser, BasketHandleService basketHandleService) {
+        this.currentUser = currentUser;
+        this.basketHandleService = basketHandleService;
+    }
+
+    @PostMapping
+    public ResponseEntity<?> addProductToBasket(
+            @RequestParam(value = "product") String productName,
+            @RequestParam @Min(1) int quantity) {
+
+        if (!this.currentUser.isLoggedIn()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        boolean success = this.basketHandleService.addProductToBasketFor(currentUser.getId(), productName, quantity);
+
+        return success ? new ResponseEntity<>(HttpStatus.OK) : new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+    }
+
+    @GetMapping
+    public ResponseEntity<BasketDto> displayCartItems() {
+        if (!this.currentUser.isLoggedIn()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        BasketDto cart = this.basketHandleService.displayCartItemsFor(this.currentUser.getId());
+
+        return new ResponseEntity<>(cart, HttpStatus.OK);
+    }
+
+    @PostMapping("/purchase")
+    public ResponseEntity<?> purchaseBasketItems() {
+        if (!this.currentUser.isLoggedIn()) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        this.basketHandleService.purchaseBasketItems(this.currentUser.getId());
+        return new ResponseEntity<>(HttpStatus.OK);
+    }
+}

src/main/java/com/paysafe/shoppingbasket/controllers/ProductController.java

+package com.paysafe.shoppingbasket.controllers;
+
+import com.paysafe.shoppingbasket.models.dtos.ProductDto;
+import com.paysafe.shoppingbasket.services.ProductService;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/products")
+public class ProductController {
+
+    private final ProductService productService;
+
+    public ProductController(ProductService productService) {
+        this.productService = productService;
+    }
+
+    @GetMapping
+    public ResponseEntity<List<ProductDto>> getAllProducts() {
+        return new ResponseEntity<>(this.productService.getAllProducts(), HttpStatus.OK);
+    }
+
+    @GetMapping("{name}")
+    public ResponseEntity<ProductDto> getProductByName(@PathVariable String name) {
+        ProductDto productByName = this.productService.getProductByName(name);
+        return new ResponseEntity<>(productByName, HttpStatus.OK);
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/current_user/CurrentUser.java

+package com.paysafe.shoppingbasket.models.current_user;
+
+import com.paysafe.shoppingbasket.models.entities.User;
+import org.springframework.stereotype.Component;
+import org.springframework.web.context.annotation.SessionScope;
+
+@Component
+@SessionScope
+public class CurrentUser {
+
+    private Long id;
+    private String username;
+
+    public void logIn(User user) {
+        this.id = user.getId();
+        this.username = user.getUsername();
+    }
+
+    public void logOut() {
+        this.id = null;
+        this.username = null;
+    }
+
+    public boolean isLoggedIn() {
+        return this.id != null;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+}

src/main/java/com/paysafe/shoppingbasket/models/dtos/BasketDto.java

+package com.paysafe.shoppingbasket.models.dtos;
+
+import java.util.List;
+
+public class BasketDto {
+
+    private String username;
+    private List<BasketItemsDto> basketItems;
+
+    public BasketDto(String username, List<BasketItemsDto> basketItems) {
+        this.username = username;
+        this.basketItems = basketItems;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public List<BasketItemsDto> getBasketItems() {
+        return basketItems;
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/dtos/BasketItemsDto.java

+package com.paysafe.shoppingbasket.models.dtos;
+
+public class BasketItemsDto {
+    private String name;
+    private Integer quantity;
+
+    public BasketItemsDto(String name, Integer quantity) {
+        this.name = name;
+        this.quantity = quantity;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Integer getQuantity() {
+        return quantity;
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/dtos/DepositFunds.java

+package com.paysafe.shoppingbasket.models.dtos;
+
+import javax.validation.constraints.Positive;
+
+public class DepositFunds {
+    @Positive
+    private double funds;
+
+    public DepositFunds() {
+    }
+
+    public double getFunds() {
+        return funds;
+    }
+
+    public void setFunds(double funds) {
+        this.funds = funds;
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/dtos/ProductDto.java

+package com.paysafe.shoppingbasket.models.dtos;
+
+import com.paysafe.shoppingbasket.models.entities.Product;
+
+import java.math.BigDecimal;
+
+public class ProductDto {
+
+    private String name;
+
+    private BigDecimal price;
+
+    public ProductDto() {
+    }
+
+    public ProductDto(Product product) {
+        this.name = product.getName();
+        this.price = product.getPrice();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public void setPrice(BigDecimal price) {
+        this.price = price;
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/dtos/UserAuthDto.java

+package com.paysafe.shoppingbasket.models.dtos;
+
+import javax.validation.constraints.NotBlank;
+import javax.validation.constraints.Size;
+
+public class UserAuthDto {
+
+    @NotBlank
+    @Size(min = 5, max = 20)
+    private String username;
+
+    @NotBlank
+    @Size(min = 5, max = 20)
+    private String password;
+
+    public UserAuthDto() {
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

src/main/java/com/paysafe/shoppingbasket/models/entities/BaseEntity.java

+package com.paysafe.shoppingbasket.models.entities;
+
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.MappedSuperclass;
+
+@MappedSuperclass
+public abstract class BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    protected BaseEntity() {
+    }
+
+    public Long getId() {
+        return this.id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+}