initHEADmaster

19 files changed, 1419 insertions, 0 deletions

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..8af972c
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2065bc
--- /dev/null
+++ b/.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/
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..73109dd
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,33 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.0'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'seu.se.Project'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(21)
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-neo4j'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation group: 'org.springdoc', name: 'springdoc-openapi-starter-webmvc-ui', version: '2.0.3'
+	implementation "org.springframework.session:spring-session-core"
+	implementation "org.springframework.data:spring-data-jpa"
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'io.projectreactor:reactor-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+//tasks.named('test') {
+//	useJUnitPlatform()
+//}
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..a4b76b9
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.jar
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..df97d72
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..f5feea6
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,252 @@
+#!/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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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/platforms/jvm/plugins-application/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##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || 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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$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, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+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 "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,94 @@
+@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
+@rem SPDX-License-Identifier: Apache-2.0
+@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. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+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
diff --git a/local.properties b/local.properties
new file mode 100644
index 0000000..fa345d1
--- /dev/null
+++ b/local.properties
@@ -0,0 +1,8 @@
+## This file must *NOT* be checked into Version Control Systems,
+# as it contains information specific to your local configuration.
+#
+# Location of the SDK. This is only used by Gradle.
+# For customization when using a Version Control System, please read the
+# header note.
+#Tue Dec 03 16:37:46 CST 2024
+sdk.dir=/opt/android-sdk
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..aa0d9d6
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'Project'
diff --git a/src/main/java/seu/se/ApiController.java b/src/main/java/seu/se/ApiController.java
new file mode 100644
index 0000000..17a6702
--- /dev/null
+++ b/src/main/java/seu/se/ApiController.java
@@ -0,0 +1,370 @@
+package seu.se;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.context.request.RequestContextHolder;
+import org.springframework.web.context.request.ServletRequestAttributes;
+
+import java.util.HashSet;
+import java.util.List;
+
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.responses.ApiResponses;
+
+@RequestMapping("/api")
+@RestController
+public class ApiController {
+    public static abstract class DataObject {
+        public Boolean ok;
+        public String message;
+        public Object otherData;
+    }
+
+    public static abstract class ReturnObject {
+        public String status;
+        public DataObject dataObj;
+    }
+
+    @GetMapping(value = "/ping")
+    public String Ping() {
+        return "Pong!";
+    }
+
+    @RequestMapping("/api/user")
+    @RestController
+    static class UserController {
+        private final UserRepository uRepo;
+
+        UserController(UserRepository uRepo) {
+            this.uRepo = uRepo;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "400", description = "Invalid userId supplied"),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @PostMapping("/login")
+        public JsonNode Login(@RequestBody com.fasterxml.jackson.databind.JsonNode body) {
+            var id = body.get("userId").asInt();
+            var password = body.get("password").asText();
+            var user = uRepo.findById(id);
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            String message;
+            Boolean ok;
+            if (user != null) {
+                if (password.equals(user.getPassword())) {
+                    ok = true;
+                    message = "Login Success";
+                    // save session
+                    ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
+                    attr.getRequest().getSession(true).setAttribute("SESSION", user);
+
+                } else {
+                    ok = false;
+                    message = "Wrong password";
+                }
+                dataObj = new ObjectMapper().valueToTree(user);
+            } else {
+                ok = false;
+                message = "User not found";
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @PostMapping("/register")
+        public JsonNode Register(@RequestBody com.fasterxml.jackson.databind.JsonNode body) {
+            var username = body.get("username").asText();
+            var password = body.get("password").asText();
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            try {
+                var user = uRepo.save(new User(username, password));
+                ok = true;
+                message = "Registered";
+                dataObj = new ObjectMapper().valueToTree(user);
+            } catch (User.UserException ue) {
+                ok = false;
+                message = ue.getMessage();
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+    }
+
+    @RequestMapping("/api/node")
+    @RestController
+    static class TreeNodeController {
+        private final TreeNodeRepository tnRepo;
+
+        TreeNodeController(TreeNodeRepository tnRepo) {
+            this.tnRepo = tnRepo;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @GetMapping("/content/{nodeId}")
+        public JsonNode getContent(@PathVariable String nodeId) {
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            var treeNode = tnRepo.findByNodeId(nodeId);
+            if (treeNode != null) {
+                ok = true;
+                message = "Success";
+                dataObj.put("nodeId", treeNode.getNodeId());
+                dataObj.put("content", treeNode.getContent());
+            } else {
+                ok = false;
+                message = "Node not found";
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @GetMapping("/exercises/{nodeId}")
+        public JsonNode getExercises(@PathVariable String nodeId) {
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            var treeNode = tnRepo.findByNodeId(nodeId);
+            if (treeNode != null) {
+                ok = true;
+                message = "Success";
+                dataObj.put("nodeId", treeNode.getNodeId());
+                var exercisesObj = new ObjectMapper().createArrayNode();
+                for (var i : treeNode.getExercises()) {
+                    var exerciseObj = new ObjectMapper().valueToTree(i);
+                    exercisesObj.add(exerciseObj);
+                }
+                dataObj.set("exercises", exercisesObj);
+            } else {
+                ok = false;
+                message = "Node not found";
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+
+            ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
+            System.out.println(attr.getRequest().getSession(true).getAttribute("SESSION"));
+
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @PostMapping("/submit/{nodeId}")
+        public JsonNode Submit(@PathVariable String nodeId, @RequestBody com.fasterxml.jackson.databind.JsonNode body) {
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            var treeNode = tnRepo.findByNodeId(nodeId);
+            ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
+            var user = (User) attr.getRequest().getSession(true).getAttribute("SESSION");
+            if (treeNode == null) {
+                ok = false;
+                message = "Node not found";
+            } else if (user == null) {
+                ok = false;
+                message = "Login first";
+            } else {
+                var score = body.get("score").asDouble();
+                var usp = treeNode.getUserScorePair(user.getId(), nodeId);
+                if (usp != null) {
+                    usp.getScores().add(score);
+                } else {
+                    treeNode.getUserScores().add(new TreeNode.UserScorePair(treeNode.getNodeId(), user.getId(), List.of(score)));
+                }
+                tnRepo.save(treeNode);
+                ok = true;
+                message = "Success";
+                dataObj.put("userId", user.getId());
+                dataObj.put("nodeId", nodeId);
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @GetMapping("/history/{nodeId}")
+        public JsonNode History(@PathVariable String nodeId) {
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            var treeNode = tnRepo.findByNodeId(nodeId);
+            ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
+            var user = (User) attr.getRequest().getSession(true).getAttribute("SESSION");
+            if (treeNode == null) {
+                ok = false;
+                message = "Node not found";
+            } else if (user == null) {
+                ok = false;
+                message = "Login first";
+            } else {
+                var usp = treeNode.getUserScorePair(user.getId(), nodeId);
+                if (usp != null) {
+                    var uspObj = new ObjectMapper().valueToTree(usp);
+                    ok = true;
+                    message = "Success";
+                    dataObj.set("historyScores", uspObj);
+                } else {
+                    ok = false;
+                    message = "No score found";
+                }
+                dataObj.put("userId", user.getId());
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @GetMapping("/home")
+        public JsonNode Home() {
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            String message;
+            Boolean ok;
+            var nodes = tnRepo.findAll();
+            var roots = new HashSet<TreeNode>();
+            for (var n : nodes) {
+                if (n.getLevel() == 1) roots.add(n);
+            }
+            if (roots.isEmpty()) {
+                ok = false;
+                message = "No root found";
+            } else {
+                class RecursiveHelper {
+                    public final List<TreeNode> nodes;
+
+                    public RecursiveHelper(List<TreeNode> nodes) {
+                        this.nodes = nodes;
+                    }
+
+                    public ObjectNode RecursiveConstruct(TreeNode tn) {
+                        ObjectNode graphNodesObj = new ObjectMapper().valueToTree(tn);
+                        ArrayNode graphNodesIterateArr = new ObjectMapper().createArrayNode();
+                        var children = tn.getChildren(nodes);
+                        if (!children.isEmpty()) {
+                            children.forEach(e -> {
+                                graphNodesIterateArr.add(RecursiveConstruct(e));
+                            });
+                            graphNodesObj.set("children", graphNodesIterateArr);
+                        }
+                        return graphNodesObj;
+                    }
+                }
+                ArrayNode graphNodesIterateArr = new ObjectMapper().createArrayNode();
+                for (var root : roots) {
+                    graphNodesIterateArr.add(new RecursiveHelper(nodes).RecursiveConstruct(root));
+                }
+                dataObj.set("graphNodes", graphNodesIterateArr);
+                ok = true;
+                message = "Success";
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+
+        @ApiResponses(value = {
+                @ApiResponse(responseCode = "200", description = "Ok", content =
+                        {@Content(mediaType = "application/json", schema =
+                        @Schema(implementation = ReturnObject.class))}),
+                @ApiResponse(responseCode = "500", description = "Internal server error")})
+        @GetMapping("/review-suggestion")
+        public JsonNode ReviewSuggestion() {
+            String message;
+            Boolean ok;
+            var retObj = new ObjectMapper().createObjectNode();
+            var dataObj = new ObjectMapper().createObjectNode();
+            ServletRequestAttributes attr = (ServletRequestAttributes) RequestContextHolder.currentRequestAttributes();
+            var user = (User) attr.getRequest().getSession(true).getAttribute("SESSION");
+            if (user == null) {
+                ok = false;
+                message = "Login first";
+            } else {
+                var reviewSuggestionsArr = new ObjectMapper().createArrayNode();
+                var nodes = tnRepo.findAll();
+                for (var node : nodes) {
+                    var usp = node.getUserScorePair(user.getId(), node.getNodeId());
+                    if (usp == null) continue;
+                    var msl = TreeNode.UserScorePair.MasteryLevel.getMasteryLevel(usp.getAverageScore());
+                    if (msl.equals(TreeNode.UserScorePair.MasteryLevel.Average) || msl.equals(TreeNode.UserScorePair.MasteryLevel.Bad))
+                        reviewSuggestionsArr.add(node.getNodeId());
+                }
+                ok = true;
+                message = "Success";
+                dataObj.put("userId", user.getId());
+                dataObj.set("reviewSuggestions", reviewSuggestionsArr);
+            }
+            dataObj.put("ok", ok);
+            dataObj.put("message", message);
+            retObj.set("data", dataObj);
+            retObj.put("status", "ok");
+            return retObj;
+        }
+    }
+}
diff --git a/src/main/java/seu/se/Application.java b/src/main/java/seu/se/Application.java
new file mode 100644
index 0000000..928bc28
--- /dev/null
+++ b/src/main/java/seu/se/Application.java
@@ -0,0 +1,102 @@
+package seu.se;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.session.MapSessionRepository;
+import org.springframework.session.config.annotation.web.http.EnableSpringHttpSession;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.servlet.NoHandlerFoundException;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+@EnableTransactionManagement
+@EnableNeo4jRepositories
+@SpringBootApplication
+public class Application {
+    private static final Logger log = LoggerFactory.getLogger(Application.class);
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    @ControllerAdvice
+    public static class ExHandler {
+        @ExceptionHandler(Exception.class)
+        public ResponseEntity<Object> handle(Exception ex, HttpServletRequest request, HttpServletResponse response) {
+            HttpStatus code = HttpStatus.INTERNAL_SERVER_ERROR;
+            String status = "internal server error";
+            if (ex instanceof NullPointerException) {
+                code = HttpStatus.BAD_REQUEST;
+                status = "bad request";
+            }
+            if (ex instanceof NoHandlerFoundException) {
+                code = HttpStatus.NOT_FOUND;
+                status = "not found";
+            }
+            var retObj = new ObjectMapper().createObjectNode();
+            retObj.put("status", status);
+            retObj.put("message", ex.getMessage());
+            return ResponseEntity.status(code).body(retObj);
+        }
+    }
+
+    // in-mem session
+    @EnableSpringHttpSession
+    @Configuration(proxyBeanMethods = false)
+    public static class SpringHttpSessionConfig {
+        @Bean
+        public MapSessionRepository sessionRepository() {
+            return new MapSessionRepository(new ConcurrentHashMap<>());
+        }
+    }
+
+    @Bean
+    public CommandLineRunner init(UserRepository ur, TreeNodeRepository tnr) {
+        return (args) -> {
+            // Load users
+            try {
+                List<User> users = new ObjectMapper().readValue(
+                        new ClassPathResource("users.json").getFile(),
+                        new TypeReference<>() {
+                        }
+                );
+                ur.saveAll(users);
+            } catch (IOException e) {
+                log.error("Error loading users from JSON file", e);
+            }
+
+            // Load tree nodes
+            TreeNode.tnRepo = tnr;
+            try {
+                List<TreeNode> treeNodes = new ObjectMapper().readValue(
+                        new ClassPathResource("treeNodes.json").getFile(),
+                        new TypeReference<>() {
+                        }
+                );
+                tnr.saveAll(treeNodes);
+            } catch (IOException e) {
+                log.error("Error loading tree nodes from JSON file", e);
+            }
+        };
+    }
+
+}
diff --git a/src/main/java/seu/se/Exercise.java b/src/main/java/seu/se/Exercise.java
new file mode 100644
index 0000000..6df9212
--- /dev/null
+++ b/src/main/java/seu/se/Exercise.java
@@ -0,0 +1,125 @@
+package seu.se;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.annotation.PersistenceCreator;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+
+@Node
+public class Exercise {
+    @Id
+    private String questionId;
+    private String question;
+    private List<OptionPair> options;
+    private String answer;
+
+    public interface Choice {
+        String A = "A";
+        String B = "B";
+        String C = "C";
+        String D = "D";
+    }
+
+    @Node
+    @JsonSerialize(using = OptionPair.OptionPairSerializer.class)
+    public static class OptionPair {
+        @Id
+        private final String id;
+        private final String key;
+        private final String value;
+
+        public static class OptionPairSerializer extends StdSerializer<OptionPair> {
+            public OptionPairSerializer() {
+                this(null);
+            }
+
+            public OptionPairSerializer(Class<OptionPair> t) {
+                super(t);
+            }
+
+            @Override
+            public void serialize(OptionPair value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+                gen.writeStartObject();
+                gen.writeStringField(value.key, value.value);
+                gen.writeEndObject();
+            }
+        }
+
+        public OptionPair(String id, String key, String value) {
+            this.id = id;
+            this.key = key;
+            this.value = value;
+        }
+
+        public String value() {
+            return value;
+        }
+
+        public String key() {
+            return key;
+        }
+
+        public String getId() {
+            return id;
+        }
+    }
+
+    @JsonCreator
+    public Exercise(@JsonProperty("questionId") String questionId, @JsonProperty("question") String question, @JsonProperty("options") Map<String, String> options, @JsonProperty("answer") String answer) {
+        this.questionId = questionId;
+        this.question = question;
+        this.options = new LinkedList<OptionPair>();
+        options.forEach((k, v) -> this.options.add(new OptionPair(String.format("%s.%s", questionId, k), k, v)));
+        this.answer = answer;
+    }
+
+    @Autowired
+    @PersistenceCreator
+    // https://stackoverflow.com/questions/55827640/how-to-fix-failed-to-instantiate-classname-using-constructor-no-constructor
+    public Exercise(String questionId, String question, List<OptionPair> options, String answer) {
+        this.questionId = questionId;
+        this.question = question;
+        this.options = options;
+        this.answer = answer;
+    }
+
+    public String getQuestion() {
+        return question;
+    }
+
+    public void setQuestion(String question) {
+        this.question = question;
+    }
+
+    public String getQuestionId() {
+        return questionId;
+    }
+
+    public List<OptionPair> getOptions() {
+        return options;
+    }
+
+    public void setOptions(List<OptionPair> options) {
+        this.options = options;
+    }
+
+    public String getAnswer() {
+        return answer;
+    }
+
+    public void setAnswer(String answer) {
+        this.answer = answer;
+    }
+}
diff --git a/src/main/java/seu/se/TreeNode.java b/src/main/java/seu/se/TreeNode.java
new file mode 100644
index 0000000..f6e28b2
--- /dev/null
+++ b/src/main/java/seu/se/TreeNode.java
@@ -0,0 +1,215 @@
+package seu.se;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.annotation.PersistenceCreator;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+
+@Node
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class TreeNode {
+    @Id
+    final private String nodeId;
+    final private String label;
+    @JsonIgnore
+    final private String content;
+    final private String relation;
+    @JsonIgnore
+    final private TreeNode father;
+    @JsonIgnore
+    private List<Exercise> exercises;
+    @JsonIgnore
+    private List<UserScorePair> userScores;
+    public static TreeNodeRepository tnRepo;
+
+    @Node
+    public static class UserScorePair {
+        @Id
+        private final String id;
+        private final String nodeId;
+        private final Long userId;
+        private List<Double> scores;
+
+        public interface MasteryLevel {
+            String Excellent = "完美";
+            String Good = "很好";
+            String Average = "一般";
+            String Bad = "差";
+
+            static String getMasteryLevel(double averageScore) {
+                if (averageScore > 95)
+                    return Excellent;
+                else if (averageScore > 80)
+                    return Good;
+                else if (averageScore > 60)
+                    return Average;
+                else
+                    return Bad;
+            }
+        }
+
+        public static class UserScoreSerializer extends StdSerializer<UserScorePair> {
+            public UserScoreSerializer() {
+                this(null);
+            }
+
+            public UserScoreSerializer(Class<UserScorePair> t) {
+                super(t);
+            }
+
+            @Override
+            public void serialize(UserScorePair value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+                gen.writeStartObject();
+                gen.writeStringField("nodeId", value.nodeId);
+                var avg = value.getAverageScore();
+                gen.writeNumberField("averageScore", avg);
+                gen.writeNumberField("lastScore", value.getLastScore());
+                gen.writeStringField("masteryLevel", MasteryLevel.getMasteryLevel(avg));
+                gen.writeEndObject();
+            }
+        }
+
+        public UserScorePair(String nodeId, Long userId, List<Double> scores) {
+            this(String.format("%s.%d", nodeId, userId), nodeId, userId, scores);
+        }
+
+        @Autowired
+        @PersistenceCreator
+        public UserScorePair(String id, String nodeId, Long userId, List<Double> scores) {
+            this.id = id;
+            this.nodeId = nodeId;
+            this.userId = userId;
+            this.scores = scores;
+        }
+
+        public String getId() {
+            return id;
+        }
+
+        public String getNodeId() {
+            return nodeId;
+        }
+
+        public Long getUserId() {
+            return userId;
+        }
+
+        public List<Double> getScores() {
+            return scores;
+        }
+
+        public Double getLastScore() {
+            return scores.getLast();
+        }
+
+        public Double getAverageScore() {
+            Double sum = 0.0;
+            for (var i : scores)
+                sum += i;
+            return scores.isEmpty() ? sum : sum / scores.size();
+        }
+
+        public void setScores(List<Double> scores) {
+            this.scores = scores;
+        }
+    }
+
+    // MUST only be called during deserialization!!
+    @JsonCreator
+    public TreeNode(@JsonProperty("nodeId") String nodeId, @JsonProperty("label") String label, @JsonProperty("content") String content, @JsonProperty("relation") String relation, @JsonProperty("fatherId") String fatherId, @JsonProperty("exercises") List<Exercise> exercises) {
+        this(nodeId, label, content, relation, tnRepo.findByNodeId(fatherId), exercises, new ArrayList<>());
+    }
+
+    public TreeNode(String nodeId, String label, String content, String relation, TreeNode father, List<Exercise> exercises) {
+        this(nodeId, label, content, relation, father, exercises, new ArrayList<>());
+    }
+
+    @Autowired
+    @PersistenceCreator
+    public TreeNode(String nodeId, String label, String content, String relation, TreeNode father, List<Exercise> exercises, List<UserScorePair> userScores) {
+        this.nodeId = nodeId;
+        this.label = label;
+        this.content = content;
+        this.relation = relation;
+        this.father = father;
+        this.exercises = exercises;
+        this.userScores = userScores;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    public String getNodeId() {
+        return nodeId;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public TreeNode getFather() {
+        return father;
+    }
+
+    public String getRelation() {
+        return relation;
+    }
+
+    public List<Exercise> getExercises() {
+        return exercises;
+    }
+
+    public void setExercises(List<Exercise> exercises) {
+        this.exercises = exercises;
+    }
+
+    public List<UserScorePair> getUserScores() {
+        return userScores;
+    }
+
+    public UserScorePair getUserScorePair(Long userId, String nodeId) {
+        var usp = userScores.stream().filter(e -> Objects.equals(e.getUserId(), userId) && e.getNodeId().equals(nodeId)).findFirst();
+        return usp.orElse(null);
+    }
+
+    public void setUserScores(List<UserScorePair> userScores) {
+        this.userScores = userScores;
+    }
+
+    public int getLevel() {
+        var tmp = this;
+        var level = 1;
+        while (tmp.father != null) {
+            tmp = tmp.father;
+            level++;
+        }
+        return level;
+    }
+
+    public Set<TreeNode> getChildren(List<TreeNode> nodes) {
+        var children = new HashSet<TreeNode>();
+        for (var n : nodes) {
+            if (n.getFather() == this) {
+                children.add(n);
+            }
+        }
+        return children;
+    }
+}
diff --git a/src/main/java/seu/se/TreeNodeRepository.java b/src/main/java/seu/se/TreeNodeRepository.java
new file mode 100644
index 0000000..d7aff83
--- /dev/null
+++ b/src/main/java/seu/se/TreeNodeRepository.java
@@ -0,0 +1,8 @@
+package seu.se;
+
+import org.springframework.data.repository.ListCrudRepository;
+import org.springframework.data.repository.PagingAndSortingRepository;
+
+public interface TreeNodeRepository extends PagingAndSortingRepository<TreeNode, String>, ListCrudRepository<TreeNode, String> {
+    TreeNode findByNodeId(String nodeId);
+}
diff --git a/src/main/java/seu/se/User.java b/src/main/java/seu/se/User.java
new file mode 100644
index 0000000..aa33038
--- /dev/null
+++ b/src/main/java/seu/se/User.java
@@ -0,0 +1,65 @@
+package seu.se;
+
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import org.springframework.data.neo4j.core.schema.GeneratedValue;
+import org.springframework.data.neo4j.core.schema.Id;
+import org.springframework.data.neo4j.core.schema.Node;
+
+@Node
+public class User {
+    @Id
+    @GeneratedValue
+    private Long id;
+    private String name;
+    @JsonIgnore
+    private String password;
+
+    @JsonCreator
+    public User(@JsonProperty("name") String name, @JsonProperty("password") String password) throws UserException {
+        setName(name);
+        setPassword(password);
+    }
+
+    static public class UserException extends Exception {
+        public UserException() {
+        }
+
+        public UserException(String message) {
+            super(message);
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("User id: %d, name: %s", id, name);
+    }
+
+    public void setName(String name) throws UserException {
+        if (name.length() > 22)
+            throw new UserException("Username too long!");
+        this.name = name;
+    }
+
+    public void setPassword(String password) throws UserException {
+        if (password.length() < 8)
+            throw new UserException("Password too short!");
+        this.password = password;
+    }
+}
+
diff --git a/src/main/java/seu/se/UserRepository.java b/src/main/java/seu/se/UserRepository.java
new file mode 100644
index 0000000..6e55754
--- /dev/null
+++ b/src/main/java/seu/se/UserRepository.java
@@ -0,0 +1,11 @@
+package seu.se;
+
+import org.springframework.data.repository.ListCrudRepository;
+import org.springframework.data.repository.PagingAndSortingRepository;
+
+import java.util.List;
+
+public interface UserRepository extends PagingAndSortingRepository<User, Long>, ListCrudRepository<User, Long> {
+    List<User> findByName(String name);
+    User findById(long id);
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..1c74f98
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1,9 @@
+spring.application.name=Neo4j SpringBoot Application
+
+springdoc.swagger-ui.path=/18f4f672-f9f4-4e8f-92ec-935e514be8ae/swagger-ui
+swagger-ui.operationsSorter=method
+
+spring.neo4j.uri=bolt://localhost:7687
+spring.data.neo4j.database = neo4j
+spring.neo4j.authentication.username=neo4j
+spring.neo4j.authentication.password=neo4j-admin
\ No newline at end of file
diff --git a/src/main/resources/treeNodes.json b/src/main/resources/treeNodes.json
new file mode 100644
index 0000000..d1fdb0a
--- /dev/null
+++ b/src/main/resources/treeNodes.json
@@ -0,0 +1,73 @@
+[
+    {
+        "nodeId": "node1",
+        "label": "Node 1",
+        "content": "Content node 1",
+        "relation": "",
+        "exercises": [
+            {
+                "questionId": "question1.1",
+                "question": "Test Question 1",
+                "options": {
+                    "A": "Node 1 Choice A",
+                    "C": "Node 2 Choice C"
+                },
+                "answer": "A"
+            }
+        ]
+    },
+    {
+        "nodeId": "node2",
+        "label": "Node 2",
+        "content": "Content node 2",
+        "relation": "Son",
+        "fatherId": "node1",
+        "exercises": [
+            {
+                "questionId": "question2.1",
+                "question": "Test Question 2",
+                "options": {
+                    "A": "Node 2 Choice A",
+                    "B": "Node 2 Choice B"
+                },
+                "answer": "A"
+            }
+        ]
+    },
+    {
+        "nodeId": "node3",
+        "label": "Node 3",
+        "content": "Content node 3",
+        "relation": "Sonson",
+        "fatherId": "node2",
+        "exercises": [
+            {
+                "questionId": "question3.1",
+                "question": "Test Question 3",
+                "options": {
+                    "A": "Node 3 Choice A",
+                    "D": "Node 3 Choice D"
+                },
+                "answer": "A"
+            }
+        ]
+    },
+    {
+        "nodeId": "node4",
+        "label": "Node 4",
+        "content": "Content node 4",
+        "relation": "Sonsonson",
+        "fatherId": "node2",
+        "exercises": [
+            {
+                "questionId": "question4.1",
+                "question": "Test Question 4",
+                "options": {
+                    "A": "Node 4 Choice A",
+                    "B": "Node 4 Choice B"
+                },
+                "answer": "A"
+            }
+        ]
+    }
+]
diff --git a/src/main/resources/users.json b/src/main/resources/users.json
new file mode 100644
index 0000000..033ed5b
--- /dev/null
+++ b/src/main/resources/users.json
@@ -0,0 +1,6 @@
+[
+    {
+        "name": "Jason",
+        "password": "suckless"
+    }
+]