final touches

Reviewed-on: #1
testiranje

.gitea/workflows/ci.yaml

@@ -0,0 +1,84 @@
+name: CI/CD
+on:
+  push:
+    branches:
+      - dev
+      - main
+  pull_request:
+    branches:
+      - main
+env:
+  JAVA_VERSION: "21"
+jobs:
+  backend-unit-tests:
+    name: Backend Unit Tests
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: backend
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up JDK ${{ env.JAVA_VERSION }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ env.JAVA_VERSION }}
+      - name: Make Gradle wrapper executable
+        run: chmod +x gradlew
+      - name: Run unit tests
+        run: ./gradlew test
+  deploy:
+    name: Deploy
+    needs: backend-unit-tests
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up JDK ${{ env.JAVA_VERSION }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: ${{ env.JAVA_VERSION }}
+      - name: Build boot jar
+        working-directory: backend
+        run: |
+          chmod +x gradlew
+          ./gradlew bootJar
+      - name: Stage jar for Docker
+        working-directory: backend
+        run: |
+          BOOT_JAR=$(find build/libs -name "*.jar" ! -name "*-plain.jar" | head -n 1)
+          cp "$BOOT_JAR" app.jar
+      - name: Login to Docker registry
+        run: |
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | \
+            docker login git.${{ secrets.DOMAIN }} \
+            -u "${{ secrets.REGISTRY_USER }}" \
+            --password-stdin
+      - name: Build Docker image
+        run: |
+          docker build \
+            -t git.${{ secrets.DOMAIN }}/${{ secrets.REGISTRY_USER }}/etf-oglasi-server:latest \
+            backend/
+      - name: Push Docker image
+        run: |
+          docker push \
+            git.${{ secrets.DOMAIN }}/${{ secrets.REGISTRY_USER }}/etf-oglasi-server:latest
+      - name: Deploy to VPS
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/key
+          chmod 600 ~/.ssh/key
+          ssh-keyscan -H "${{ secrets.DEPLOY_HOST }}" >> ~/.ssh/known_hosts
+
+
+          ssh -i ~/.ssh/key \
+            "${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_HOST }}" \
+            "mkdir -p ~/programs/etf-oglasi-server/config"
+
+
+          ssh -i ~/.ssh/key \
+            "${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_HOST }}" \
+            "cd ~/programs/etf-oglasi-server && docker compose pull && docker compose up -d"

.gitignore

@@ -1,18 +1,8 @@
-backend/.db/
-backend/.env
-backend/todo
-backend/.creds
-backend/init/*
-backend/*temp.java
-backend/src/main/java/dev/ksan/etfoglasiserver/temp.java
+########################
+# GLOBAL (all projects)
+########################
 
-
-
-
-
-# Java / Gradle
-backend/.gradle/
-backend/build/
+todo
 
 # IDEs
 .idea/
@@ -21,7 +11,33 @@ backend/build/
 *.ipr
 *.iws
 
-# Eclipse / STS
+# OS
+.DS_Store
+
+# Logs
+*.log
+
+########################
+# BACKEND (Spring Boot)
+########################
+
+backend/.gradle/
+backend/build/
+backend/bin/
+backend/src/main/resources/application.properties
+
+backend/.env
+backend/.creds
+backend/.db/
+
+backend/init/*
+backend/**/*temp.java
+
+backend/src/main/resources/google-services.json
+backend/src/main/resources/etf-oglasi-firebase.json
+backend/src/main/resources/firebase.json
+
+# Java / Eclipse / STS
 .classpath
 .project
 .settings/
@@ -34,54 +50,45 @@ nbbuild/
 nbdist/
 .nb-gradle/
 
-# Environment & secrets
-backend/.env
-backend/.creds
+########################
+# FRONTEND (React Native / Expo)
+########################
 
-# Local database
-backend/.db/
+frontend/node_modules/
 
-## frontend
+frontend/google-services.json
 
-# dependencies
-node_modules/
+frontend/.expo/
+frontend/dist/
+frontend/web-build/
+
+frontend/.kotlin/
+frontend/*.orig.*
+frontend/*.jks
+frontend/*.p8
+frontend/*.p12
+frontend/*.key
+frontend/*.mobileprovision
+
+frontend/.metro-health-check*
+
+frontend/npm-debug.*
+frontend/yarn-debug.*
+frontend/yarn-error.*
+
+frontend/.env
+frontend/.env*.local
+
+frontend/*.tsbuildinfo
+
+# Native builds
+frontend/ios/
+frontend/android/
 
 # Expo
-.expo/
-dist/
-web-build/
-expo-env.d.ts
+frontend/expo-env.d.ts
 
-# Native
-.kotlin/
-*.orig.*
-*.jks
-*.p8
-*.p12
-*.key
-*.mobileprovision
 
-# Metro
-.metro-health-check*
 
-# debug
-npm-debug.*
-yarn-debug.*
-yarn-error.*
-
-# macOS
-.DS_Store
-*.pem
-
-# local env files
-.env*.local
-frontend/.env
-
-# typescript
-*.tsbuildinfo
-
-app-example
-
-# generated native folders
-/ios
-/android
+CLAUDE.md
+ksan.dev.keystore

README.md

@@ -0,0 +1,91 @@
+# Full-Stack Learning Project
+
+This repository is a full-stack learning project focused on building and understanding modern application development practices end-to-end.
+
+It demonstrates how to design, build, and deploy a real-world application using a backend API, mobile frontend, database integration, and CI/CD workflows.
+
+---
+
+## Tech Stack
+
+### Backend
+- Spring Boot
+- RESTful API architecture
+- PostgreSQL database
+
+### Frontend
+- React Native (Expo)
+
+### DevOps / Tooling
+- Docker
+- CI/CD pipelines (Gitea Actions or similar)
+- Git version control
+
+---
+
+## Purpose
+
+The goal of this project is to gain hands-on experience with:
+
+- Full-stack application architecture
+- Backend API development with Spring Boot
+- Mobile development with React Native
+- Database design and integration
+- Authentication and security concepts
+- Containerization with Docker
+- Continuous Integration / Continuous Deployment (CI/CD)
+
+---
+
+## Deployment
+
+The application is deployed on a self-hosted home server for development and testing purposes.
+
+---
+
+## How to Run (Backend)
+
+To be added.
+
+Planned steps:
+- Install Java and Gradle
+- Configure PostgreSQL database
+- Set environment variables
+- Run Spring Boot application
+- Expose API on localhost or network
+- I usually run eveything with traefik but i dont know should i include that here???
+
+---
+
+## How to Run (Frontend)
+
+To be added...
+
+
+---
+
+
+## CI/CD
+
+To be added.
+
+Planned steps:
+- Configure Gitea Actions / CI pipeline
+- Build backend and frontend automatically
+- Deploy to home server
+- Automate testing and builds
+
+---
+
+## Status
+
+This project is currently under semi-active development as a learning and experimentation environment.
+
+---
+
+## Notes
+
+This project is just me messing around with stuff while making an app i will use and perhaps others will find it useful
+
+
+need to made .creds .env and init directory with subjects.txt

backend/Dockerfile

@@ -0,0 +1,5 @@
+FROM eclipse-temurin:21-jre-jammy
+WORKDIR /app
+COPY app.jar app.jar
+EXPOSE 8080
+ENTRYPOINT ["java", "-jar", "/app/app.jar"]

backend/bin/main/application.properties

@@ -1,4 +0,0 @@
-spring.application.name=etfoglasi-server
-spring.datasource.url=jdbc:postgresql://localhost:5432/etfo-db
-spring.datasource.username=test
-spring.datasource.password=test

backend/build.gradle

@@ -39,6 +39,19 @@ dependencies {
     runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.13.0")
     implementation("io.jsonwebtoken:jjwt-api:0.13.0")
     runtimeOnly("io.jsonwebtoken:jjwt-impl:0.13.0")
+    implementation("org.projectlombok:lombok:1.18.42")
+    annotationProcessor 'org.projectlombok:lombok:1.18.42'
+    implementation 'com.google.firebase:firebase-admin:9.9.0'
+
+
+
+    testImplementation 'org.springframework.security:spring-security-test'
+    testRuntimeOnly 'com.h2database:h2'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testImplementation("org.testcontainers:postgresql:1.21.3")
+    testImplementation("org.testcontainers:junit-jupiter:1.21.4")
+    testImplementation("org.mockito:mockito-inline:5.2.0")
+    testImplementation 'org.mockito:mockito-core'
 }
 
 generateJava {
@@ -49,4 +62,8 @@ generateJava {
 
 tasks.named('test') {
     useJUnitPlatform()
+
+    jvmArgs += [
+            "-javaagent:${configurations.testRuntimeClasspath.find { it.name.contains('byte-buddy-agent') }}"
+    ]
 }

backend/compose.yaml

@@ -3,11 +3,11 @@ services:
     image: 'postgres:16'
     container_name: etfo-db
     environment:
-      - 'POSTGRES_DB=etfo-db'
-      - 'POSTGRES_PASSWORD=test'
-      - 'POSTGRES_USER=test'
+      - POSTGRES_DB=etfo-db
+      - POSTGRES_PASSWORD=test
+      - POSTGRES_USER=test
     volumes:
       - ./init.sql:/docker-entrypoint-initdb.d/init.sql
       - ./.db:/var/lib/postgresql/data
     ports:
-      - '5432:5432'
+      - 5432:5432

backend/init.sql

@@ -37,7 +37,7 @@ CREATE TABLE IF NOT EXISTS public.subjects
     CONSTRAINT subjects_pkey PRIMARY KEY (id)
 );
 
-CREATE TABLE IF NOT EXISTS public."user-subject"
+CREATE TABLE IF NOT EXISTS public."user_subject"
 (
     user_id uuid NOT NULL,
     subject_id uuid NOT NULL,
@@ -55,6 +55,32 @@ CREATE TABLE IF NOT EXISTS public.users
     CONSTRAINT unique_email UNIQUE (email)
 );
 
+
+CREATE TABLE IF NOT EXISTS public.device_tokens
+(
+    id uuid NOT NULL DEFAULT uuid_generate_v4(),
+    user_id uuid NOT NULL,
+    fcm_token text NOT NULL,
+    updated_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT device_tokens_pkey PRIMARY KEY (id),
+
+    CONSTRAINT fk_device_tokens_user
+        FOREIGN KEY (user_id)
+        REFERENCES public.users(id)
+        ON DELETE CASCADE,
+
+    CONSTRAINT uq_device_tokens_fcm_token
+        UNIQUE (fcm_token)
+);
+
+CREATE INDEX idx_device_tokens_user_id
+    ON public.device_tokens(user_id);
+
+
+
+
+
 ALTER TABLE IF EXISTS public.alt_subject
     ADD CONSTRAINT alt_subject_subject_id_fkey FOREIGN KEY (subject_id)
     REFERENCES public.subjects (id) MATCH SIMPLE

backend/src/main/java/dev/ksan/etfoglasiserver/EtfoglasiServerApplication.java

@@ -11,7 +11,9 @@ import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
+import org.springframework.scheduling.annotation.EnableAsync;
 
+@EnableAsync
 @SpringBootApplication
 public class EtfoglasiServerApplication {
 

backend/src/main/java/dev/ksan/etfoglasiserver/config/FirebaseConfig.java

@@ -0,0 +1,42 @@
+package dev.ksan.etfoglasiserver.config;
+
+import com.google.auth.oauth2.GoogleCredentials;
+import com.google.firebase.FirebaseApp;
+import com.google.firebase.FirebaseOptions;
+import com.google.firebase.messaging.FirebaseMessaging;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.List;
+
+@Configuration
+public class FirebaseConfig {
+
+    @Value("${firebase.credentials.path}")
+    private String credentialsPath;
+
+    @Bean
+    public FirebaseApp firebaseApp() throws IOException {
+        GoogleCredentials credentials = GoogleCredentials
+                .fromStream(new FileInputStream(credentialsPath))
+                .createScoped(List.of("https://www.googleapis.com/auth/firebase.messaging"));
+
+        FirebaseOptions options = FirebaseOptions.builder()
+                .setCredentials(credentials)
+                .build();
+
+        if (FirebaseApp.getApps().isEmpty()) {
+            return FirebaseApp.initializeApp(options);
+        }
+        return FirebaseApp.getInstance();
+    }
+
+    @Bean
+    public FirebaseMessaging firebaseMessaging(FirebaseApp firebaseApp) {
+        return FirebaseMessaging.getInstance(firebaseApp);
+    }
+}

backend/src/main/java/dev/ksan/etfoglasiserver/config/JwtFilter.java

@@ -2,7 +2,7 @@ package dev.ksan.etfoglasiserver.config;
 
 import dev.ksan.etfoglasiserver.service.JWTService;
 import dev.ksan.etfoglasiserver.service.MyUserDetailsService;
-import dev.ksan.etfoglasiserver.service.UserService;
+import io.jsonwebtoken.JwtException;
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
@@ -33,9 +33,15 @@ public class JwtFilter extends OncePerRequestFilter {
         String token = null;
         String username = null;
 
+
         if (authHeader != null && authHeader.startsWith("Bearer ")) {
             token = authHeader.substring(7);
+            try {
                 username = jwtService.extractEmail(token);
+            } catch (JwtException e) {
+                // expired, malformed, or otherwise invalid token - treat as unauthenticated
+                username = null;
+            }
         }
 
         if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {

backend/src/main/java/dev/ksan/etfoglasiserver/config/SecurityConfig.java

@@ -3,6 +3,7 @@ package dev.ksan.etfoglasiserver.config;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.authentication.AuthenticationProvider;
 import org.springframework.security.authentication.dao.DaoAuthenticationProvider;
@@ -13,8 +14,14 @@ import org.springframework.security.config.annotation.web.configuration.EnableWe
 import org.springframework.security.config.http.SessionCreationPolicy;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.security.web.SecurityFilterChain;
 import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.List;
 
 @Configuration
 @EnableWebSecurity
@@ -29,19 +36,39 @@ public class SecurityConfig {
     @Bean
     public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
 
-        return http.csrf(customizer -> customizer.disable()).
-                authorizeHttpRequests(request -> request
+        return http
+                .csrf(customizer -> customizer.disable())
+                .cors(cors -> {})
+                .authorizeHttpRequests(request -> request
+                        .requestMatchers(HttpMethod.OPTIONS, "/**").permitAll()
                         .requestMatchers("/api/login", "/api/register").permitAll()
                         .requestMatchers("/api/subjects/**", "/api/entries", "/api/groups").permitAll()
-                        .anyRequest().authenticated()).
-                httpBasic(Customizer.withDefaults()).
-                sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
+                        .anyRequest().authenticated()
+                )
+                .httpBasic(Customizer.withDefaults())
+                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                 .addFilterBefore(jwtFilter, UsernamePasswordAuthenticationFilter.class)
                 .build();
-
-
     }
 
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration config = new CorsConfiguration();
+
+        config.setAllowedOrigins(List.of(
+                "http://localhost:8081",
+                "https://etf-oglasi.ksan.dev"
+        ));
+
+        config.setAllowedMethods(List.of("GET","POST","PUT","DELETE","OPTIONS"));
+        config.setAllowedHeaders(List.of("*"));
+        config.setAllowCredentials(true);
+
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/**", config);
+
+        return source;
+    }
 
 
 
@@ -61,4 +88,10 @@ public class SecurityConfig {
     }
 
 
+    @Bean
+    public PasswordEncoder passwordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+
+
 }

backend/src/main/java/dev/ksan/etfoglasiserver/controller/DeviceTokenController.java

@@ -0,0 +1,30 @@
+package dev.ksan.etfoglasiserver.controller;
+
+import dev.ksan.etfoglasiserver.model.RegisterTokenRequest;
+import dev.ksan.etfoglasiserver.service.DeviceTokenService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.web.bind.annotation.*;
+
+
+@RestController
+@RequestMapping("/api/device-tokens")
+@RequiredArgsConstructor
+public class DeviceTokenController {
+
+    private final DeviceTokenService deviceTokenService;
+
+    @PostMapping("/register")
+    public ResponseEntity<Void> register(
+            @RequestBody RegisterTokenRequest request,
+            @AuthenticationPrincipal UserDetails principal) {
+
+        deviceTokenService.registerToken(
+                principal.getUsername(),
+                request.getToken());
+
+        return ResponseEntity.noContent().build();
+    }
+}

backend/src/main/java/dev/ksan/etfoglasiserver/controller/EntryController.java

@@ -11,7 +11,9 @@ import org.springframework.data.domain.PageRequest;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.web.PageableDefault;
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
 
 @RestController
 @RequestMapping("/api")
@@ -23,7 +25,7 @@ public class EntryController {
     return service.getEntryById(entryId);
   }
 
-  //ignore this for now
+  // TODO only for testing
   @PostMapping("/entries")
   public void addEntry(@RequestBody EntryDTO entry) {
     service.addEntry(entry);
@@ -36,23 +38,38 @@ public class EntryController {
   }
 
 
+
+
   @GetMapping("/entries")
   public Page<Entry> getEntries(
           @RequestParam(required = false) String subjectId,
           @RequestParam(required = false) String groupName,
           @RequestParam(defaultValue = "0") int page
   ) {
-    UUID parsedSubjectId = subjectId != null ? UUID.fromString(subjectId) : null;
+//    UUID parsedSubjectId = subjectId != null ? UUID.fromString(subjectId) : null;
+
+    UUID parsedSubjectId = null;
+    if (subjectId != null) {
+      try{
+        parsedSubjectId = UUID.fromString(subjectId);
+      }catch (IllegalArgumentException e){
+        throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid subject ID");
+      }
+    }
+
+
     return service.getEntries(parsedSubjectId, groupName, page);
   }
 
-  @PutMapping("/entries")
-  public void updateEntry(@RequestBody EntryDTO entry) {
-    service.updateEntry(entry);
-  }
 
-  @DeleteMapping("/entries/{entryId}")
-  public void deleteEntry(@PathVariable String entryId) {
-    service.deleteEntry(entryId);
-  }
+//  @PutMapping("/entries")
+//  public void updateEntry(@RequestBody EntryDTO entry) {
+//    service.updateEntry(entry);
+//  }
+
+//  @DeleteMapping("/entries/{entryId}")
+//  public void deleteEntry(@PathVariable String entryId) {
+//    service.deleteEntry(entryId);
+//  }
+//
 }

backend/src/main/java/dev/ksan/etfoglasiserver/controller/SubjectAltController.java

@@ -23,13 +23,13 @@ public class SubjectAltController {
     return service.getSubjectAlt(subjectId);
   }
 
-  @PostMapping("/subjectalt")
-  public void addSubject(@RequestBody SubjectAlt subject) {
-    service.addSubjectAlt(subject);
-  }
-
-  @DeleteMapping("/subjectalt/{subjectId}")
-  public void deleteSubject(@PathVariable UUID subjectId) {
-    service.deleteSubjectAlt(subjectId);
-  }
+//  @PostMapping("/subjectalt")
+//  public void addSubject(@RequestBody SubjectAlt subject) {
+//    service.addSubjectAlt(subject);
+//  }
+//
+//  @DeleteMapping("/subjectalt/{subjectId}")
+//  public void deleteSubject(@PathVariable UUID subjectId) {
+//    service.deleteSubjectAlt(subjectId);
+//  }
 }

backend/src/main/java/dev/ksan/etfoglasiserver/controller/SubjectController.java

@@ -22,18 +22,21 @@ public class SubjectController {
     return service.getSubject(subjectId);
   }
 
+
   @PostMapping("/subjects")
   public void addSubject(@RequestBody Subject subject) {
     service.addSubject(subject);
   }
 
-  @PutMapping("/subjects")
-  public void updateSubject(@RequestBody Subject subject) {
-    service.updateSubject(subject);
-  }
+//TODO uncomment this if ever roles are added so only admin should modify this (didnt really feel like doing it rn)
+//
+//  @PutMapping("/subjects")
+//  public void updateSubject(@RequestBody Subject subject) {
+//    service.updateSubject(subject);
+//  }
 
-  @DeleteMapping("/subjects/{subjectId}")
-  public void deleteSubject(@PathVariable UUID subjectId) {
-    service.deleteSubject(subjectId);
-  }
+//  @DeleteMapping("/subjects/{subjectId}")
+//  public void deleteSubject(@PathVariable UUID subjectId) {
+//    service.deleteSubject(subjectId);
+//  }
 }

backend/src/main/java/dev/ksan/etfoglasiserver/controller/UserController.java

@@ -5,13 +5,17 @@ import dev.ksan.etfoglasiserver.dto.UserCreationDTO;
 import dev.ksan.etfoglasiserver.dto.UserDTO;
 import dev.ksan.etfoglasiserver.dto.UserLoginDTO;
 import dev.ksan.etfoglasiserver.model.NotificationMethod;
+import dev.ksan.etfoglasiserver.model.User;
 import dev.ksan.etfoglasiserver.service.UserService;
-import java.util.List;
+
+import java.util.Map;
 import java.util.UUID;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.Authentication;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.server.ResponseStatusException;
 
 @RestController
 @RequestMapping("/api")
@@ -20,76 +24,106 @@ public class UserController {
   @Autowired UserService service;
 
 
-  @GetMapping("users/{userId}")
-  public ResponseEntity<UserDTO> getUserById(@PathVariable UUID userId) {
+  @GetMapping("/users/me")
+  public ResponseEntity<UserDTO> getUserById(Authentication authentication) {
+    String email = authentication.getName();
 
-    UserDTO user = service.getUserById(userId);
+    User user = service.getAccountByEmail(email)
+            .orElseThrow(() -> new ResponseStatusException(
+                    HttpStatus.NOT_FOUND, "User not found"
+            ));
 
-    if (user != null) {
-      return new ResponseEntity<>(user, HttpStatus.OK);
-    }
-    return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+    return ResponseEntity.ok(new UserDTO(user));
   }
 
-  @PutMapping("/users")
-  public ResponseEntity<UserDTO> updateUser(@RequestBody UserCreationDTO user) {
+  @PutMapping("/users/me")
+  public ResponseEntity<UserDTO> updateUser(
+          @RequestBody UserCreationDTO user,
+          Authentication authentication) {
 
-    UserDTO userUpdated = service.updateUser(user);
-    if (userUpdated != null) {
-      return new ResponseEntity<>(userUpdated, HttpStatus.OK);
-    }
-    return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+    String email = authentication.getName();
+
+    UserDTO userUpdated = service.updateUser(email, user);
+
+    return ResponseEntity.ok(userUpdated);
   }
 
-    @PutMapping("/users/{userId}/subjects/{subjectId}")
+
+
+  @PostMapping("/users/me/notification-type")
+  public ResponseEntity<?> updateNotificationType(
+          @RequestBody Map<String, String> request,
+          Authentication authentication) {
+
+    String email = authentication.getName();
+    NotificationMethod type = NotificationMethod.valueOf(request.get("notificationType"));
+    service.updateNotificationType(email, type);
+
+    return ResponseEntity.ok(Map.of("status", "updated"));
+  }
+
+  @PutMapping("/users/me/subjects/{subjectId}")
   public ResponseEntity<UserDTO> addSubject(
-            @PathVariable UUID userId,
-            @PathVariable UUID subjectId
-    ) {
+          @PathVariable UUID subjectId,
+          Authentication authentication) {
 
-        UserDTO updatedUser = service.addSubject(userId, subjectId);
+    String email = authentication.getName();
+
+    UserDTO updatedUser = service.addSubject(email, subjectId);
 
     return ResponseEntity.ok(updatedUser);
   }
 
-    @DeleteMapping("/users/{userId}/subjects/{subjectId}")
+  @DeleteMapping("/users/me/subjects/{subjectId}")
   public ResponseEntity<UserDTO> removeSubject(
-            @PathVariable UUID userId,
-            @PathVariable UUID subjectId
-    ) {
+          @PathVariable UUID subjectId,
+          Authentication authentication) {
 
-        UserDTO updatedUser = service.removeSubject(userId, subjectId);
+    String email = authentication.getName();
+
+    UserDTO updatedUser = service.removeSubject(email, subjectId);
 
     return ResponseEntity.ok(updatedUser);
   }
 
+  // not the best, should fix this later
   @PostMapping("/login")
   public ResponseEntity<JwtResponseDTO> login(@RequestBody UserLoginDTO user) {
+    try {
       JwtResponseDTO userVer = service.verify(user);
 
       if (userVer != null) return new ResponseEntity<>(userVer, HttpStatus.OK);
+    }catch (Exception e) {
+
       return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
     }
 
+    return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+  }
+
+  // not the best, should fix this later too
   @PostMapping("/register")
   public ResponseEntity<UserDTO> register(@RequestBody UserCreationDTO user) {
 
+    try {
       UserDTO newUser = service.register(user);
       if (newUser != null) return new ResponseEntity<>(newUser, HttpStatus.CREATED);
+    }catch (Exception e) {
+
+      return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+    }
     return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
   }
-//
-//  @DeleteMapping("/users/{userId}")
-//  public void deleteUser(@PathVariable UUID userId) {
-//    service.deleteUser(userId);
-//  }
 
-  /*
-  @PostMapping("/users")
-  public void addUser(@RequestBody UserCreationDTO user) {
-    NotificationMethod method = NotificationMethod.valueOf(user.getNotification());
-    user.setNotificationMethod(method);
-    service.addUser(user);
+
+
+  @DeleteMapping("/users/me")
+  public ResponseEntity<Void> deleteUser(Authentication authentication) {
+
+    String email = authentication.getName();
+
+    service.deleteUser(email);
+
+    return ResponseEntity.noContent().build();
   }
-  */
 }

backend/src/main/java/dev/ksan/etfoglasiserver/dto/UserCreationDTO.java

@@ -12,6 +12,11 @@ public class UserCreationDTO {
   private Set<Subject> subjectSet;
   private String notification;
 
+  public UserCreationDTO(String mail, String password) {
+    this.email = mail;
+    this.password = password;
+  }
+
   public String getEmail() {
     return email;
   }

backend/src/main/java/dev/ksan/etfoglasiserver/dto/UserDTO.java

@@ -2,13 +2,26 @@ package dev.ksan.etfoglasiserver.dto;
 
 import dev.ksan.etfoglasiserver.model.NotificationMethod;
 import dev.ksan.etfoglasiserver.model.Subject;
+import dev.ksan.etfoglasiserver.model.User;
+import lombok.Getter;
+import lombok.Setter;
+
 import java.util.Set;
 import java.util.UUID;
 
 public class UserDTO {
+  @Setter
+  @Getter
   private UUID id;
+  @Setter
+  @Getter
   private String email;
+  @Setter
+  @Getter
   private Set<Subject> subjectSet;
+  @Getter
+  @Setter
+  private NotificationMethod notificationType;
 
   public UserDTO() {}
 
@@ -17,31 +30,17 @@ public class UserDTO {
     this.id = id;
     this.email = email;
     this.subjectSet = subjectSet;
+    this.notificationType = notificationMethod2;
   }
 
-  public UUID getId() {
-    return id;
-  }
+    public UserDTO(User user) {
+    this.id = user.getId();
+    this.email = user.getEmail();
+    this.subjectSet = user.getSubjectSet();
+    this.notificationType = user.getNotificationMethod();
 
-  public void setId(UUID id) {
-    this.id = id;
-  }
-
-  public String getEmail() {
-    return email;
-  }
-
-  public void setEmail(String email) {
-    this.email = email;
-  }
-
-  public Set<Subject> getSubjectSet() {
-    return subjectSet;
-  }
-
-  public void setSubjectSet(Set<Subject> subjectSet) {
-    this.subjectSet = subjectSet;
     }
 
 
+
 }

backend/src/main/java/dev/ksan/etfoglasiserver/dto/UserLoginDTO.java

@@ -1,5 +1,8 @@
 package dev.ksan.etfoglasiserver.dto;
 
+import lombok.AllArgsConstructor;
+
+@AllArgsConstructor
 public class UserLoginDTO {
 
   private String email;

backend/src/main/java/dev/ksan/etfoglasiserver/model/DeviceToken.java

@@ -0,0 +1,41 @@
+package dev.ksan.etfoglasiserver.model;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Getter                  // ← add class-level getter
+@Entity
+@Table(
+        name = "device_tokens",
+        uniqueConstraints = {
+                @UniqueConstraint(columnNames = "fcm_token")
+        }
+)
+public class DeviceToken {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private UUID id;
+
+    @Setter
+    @ManyToOne(fetch = FetchType.LAZY, optional = false)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @Setter
+    @Column(name = "fcm_token", nullable = false)
+    private String fcmToken;
+
+    @Column(name = "updated_at")
+    private LocalDateTime updatedAt;
+
+    @PrePersist
+    @PreUpdate
+    public void touch() {
+        this.updatedAt = LocalDateTime.now();
+    }
+}

backend/src/main/java/dev/ksan/etfoglasiserver/model/NotificationMethod.java

@@ -3,6 +3,5 @@ package dev.ksan.etfoglasiserver.model;
 public enum NotificationMethod {
 
     NO_NOTIFICATION,
-    EMAIL,
     PUSH_NOTIFICATION
 }

backend/src/main/java/dev/ksan/etfoglasiserver/model/RegisterTokenRequest.java

@@ -0,0 +1,8 @@
+package dev.ksan.etfoglasiserver.model;
+
+import lombok.Data;
+
+@Data
+public class RegisterTokenRequest {
+    private String token;
+}

backend/src/main/java/dev/ksan/etfoglasiserver/model/Subject.java

@@ -1,6 +1,8 @@
 package dev.ksan.etfoglasiserver.model;
 
 import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
 
 import java.util.Set;
 import java.util.UUID;
@@ -9,13 +11,18 @@ import java.util.UUID;
 @Table(name = "subjects")
 public class Subject {
 
+  @Getter
   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   @Column(columnDefinition = "uuid")
   private UUID id;
 
+  @Getter
+  @Setter
   @Column private long code;
 
+  @Getter
+  @Setter
   @Column(nullable = false)
   private String name;
 
@@ -26,23 +33,4 @@ public class Subject {
   public Subject(){
   }
 
-  public UUID getId() {
-    return id;
-  }
-
-  public long getCode() {
-    return code;
-  }
-
-  public void setCode(long code) {
-    this.code = code;
-  }
-
-  public String getName() {
-    return name;
-  }
-
-  public void setName(String name) {
-    this.name = name;
-  }
 }

backend/src/main/java/dev/ksan/etfoglasiserver/model/SubjectAlt.java

@@ -9,6 +9,8 @@ import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.Table;
+import lombok.Setter;
+
 import java.util.UUID;
 
 @Entity
@@ -18,9 +20,11 @@ public class SubjectAlt {
   @GeneratedValue(strategy = GenerationType.AUTO)
   private UUID id;
 
+  @Setter
   @Column(nullable = false)
   String name;
 
+  @Setter
   @ManyToOne(fetch = FetchType.EAGER)
   @JoinColumn(nullable = false)
   private Subject subject;
@@ -32,22 +36,15 @@ public class SubjectAlt {
   }
 
   public UUID getId() {
-    return id;
+    return this.id;
   }
 
   public String getName() {
-    return name;
-  }
-
-  public void setName(String name) {
-    this.name = name;
+    return this.name;
   }
 
   public Subject getSubject() {
-    return subject;
+    return this.subject;
   }
 
-  public void setSubject(Subject subject) {
-    this.subject = subject;
-  }
 }

backend/src/main/java/dev/ksan/etfoglasiserver/model/User.java

@@ -3,6 +3,8 @@ package dev.ksan.etfoglasiserver.model;
 import dev.ksan.etfoglasiserver.dto.UserCreationDTO;
 import jakarta.persistence.*;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Set;
 import java.util.UUID;
 
@@ -24,18 +26,40 @@ public class User {
           nullable = false,
           updatable = false,
           insertable = false,
-      columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP")
+          columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP"
+  )
   private LocalDateTime regTime;
 
   @Enumerated(EnumType.STRING)
   @Column(name = "notification_type", nullable = false)
-  private NotificationMethod notificationType = NotificationMethod.NO_NOTIFICATION;
+  private NotificationMethod notificationType =
+          NotificationMethod.PUSH_NOTIFICATION;
 
   @ManyToMany(fetch = FetchType.LAZY)
-  @JoinTable(name = "user-subject", joinColumns = @JoinColumn(name = "user_id"),
-  inverseJoinColumns = @JoinColumn(name = "subject_id"))
+  @JoinTable(
+          name = "user_subject",
+          joinColumns = @JoinColumn(name = "user_id"),
+          inverseJoinColumns = @JoinColumn(name = "subject_id")
+  )
   private Set<Subject> subjectSet;
 
+  @OneToMany(
+          mappedBy = "user",
+          cascade = CascadeType.ALL,
+          orphanRemoval = true,
+          fetch = FetchType.LAZY
+  )
+  private List<DeviceToken> deviceTokens = new ArrayList<>();
+
+  public void addDeviceToken(DeviceToken token) {
+    deviceTokens.add(token);
+    token.setUser(this);
+  }
+
+  public void removeDeviceToken(DeviceToken token) {
+    deviceTokens.remove(token);
+    token.setUser(null);
+  }
   public User() {}
 
   public User(UserCreationDTO user) {
@@ -89,4 +113,5 @@ public class User {
   public NotificationMethod getNotificationMethod() {
     return notificationType;
   }
+
 }

backend/src/main/java/dev/ksan/etfoglasiserver/repository/DeviceTokenRepo.java

@@ -0,0 +1,20 @@
+package dev.ksan.etfoglasiserver.repository;
+
+import dev.ksan.etfoglasiserver.model.DeviceToken;
+import dev.ksan.etfoglasiserver.model.Entry;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+@Repository
+public interface DeviceTokenRepo  extends JpaRepository<DeviceToken, UUID> {
+
+    List<DeviceToken> findByUserId(UUID userId);
+
+    Optional<DeviceToken> findByFcmToken(String fcmToken);
+
+    void deleteByFcmToken(String fcmToken);
+}

backend/src/main/java/dev/ksan/etfoglasiserver/service/DeviceTokenService.java

@@ -0,0 +1,31 @@
+package dev.ksan.etfoglasiserver.service;
+
+import dev.ksan.etfoglasiserver.model.DeviceToken;
+import dev.ksan.etfoglasiserver.model.User;
+import dev.ksan.etfoglasiserver.repository.DeviceTokenRepo;
+import dev.ksan.etfoglasiserver.repository.UserRepo;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class DeviceTokenService {
+
+    private final DeviceTokenRepo deviceTokenRepo;
+    private final UserRepo userRepo;
+
+    public void registerToken(String email, String token) {
+
+        User user = userRepo.findByEmail(email)
+                .orElseThrow(() -> new RuntimeException("User not found"));
+
+        DeviceToken deviceToken = deviceTokenRepo
+                .findByFcmToken(token)
+                .orElse(new DeviceToken());
+
+        deviceToken.setUser(user);
+        deviceToken.setFcmToken(token);
+
+        deviceTokenRepo.save(deviceToken);
+    }
+}

backend/src/main/java/dev/ksan/etfoglasiserver/service/EntryService.java

@@ -43,6 +43,8 @@ public class EntryService {
     Entry newEntry = new Entry(entry);
     newEntry.setSubject(subject);
     entryRepo.save(newEntry);
+
+    subjectService.notifyAsync(newEntry);
   }
 
   public void addEntry(Entry entry) {
@@ -63,7 +65,7 @@ public class EntryService {
       System.out.println("Duplicate");
       return;
     }
-    subjectService.notify(entry);
+    subjectService.notifyAsync(entry);
   }
 
   public void updateEntry(EntryDTO entry) {

backend/src/main/java/dev/ksan/etfoglasiserver/service/JWTService.java

@@ -1,42 +1,31 @@
 package dev.ksan.etfoglasiserver.service;
 
-import dev.ksan.etfoglasiserver.model.User;
 import io.jsonwebtoken.Claims;
 import io.jsonwebtoken.Jwts;
-import java.security.NoSuchAlgorithmException;
 import java.util.*;
 import java.util.function.Function;
-import javax.crypto.KeyGenerator;
 import javax.crypto.SecretKey;
 
 import io.jsonwebtoken.io.Decoders;
 import io.jsonwebtoken.security.Keys;
-import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.stereotype.Service;
 
 @Service
 public class JWTService {
 
-    //TODO add persistent token env variable
-  private String secretKey = "";
+  @Value("${jwt.secret}")
+  private String secretKey;
+
 
-  private JWTService() {
-    try {
-      KeyGenerator keyGen = KeyGenerator.getInstance("HmacSHA256");
-      SecretKey secKey = keyGen.generateKey();
-      secretKey = Base64.getEncoder().encodeToString(secKey.getEncoded());
-    } catch (NoSuchAlgorithmException e) {
-      throw new RuntimeException(e);
-    }
-  }
 
   public String generateToken(String email) {
     Map<String, Object> claims = new HashMap<>();
 
 
     return Jwts.builder().claims().add(claims).subject(email)
-            .issuedAt(new Date(System.currentTimeMillis())).expiration(new Date(System.currentTimeMillis()+60*60*300))
+            .issuedAt(new Date(System.currentTimeMillis())).expiration(new Date(System.currentTimeMillis()+1000L*60*60*24*60))
             .and().signWith(getKey()).compact();
   }
 

backend/src/main/java/dev/ksan/etfoglasiserver/service/NotificationService.java

@@ -0,0 +1,46 @@
+package dev.ksan.etfoglasiserver.service;
+
+import com.google.firebase.messaging.*;
+import dev.ksan.etfoglasiserver.model.DeviceToken;
+import dev.ksan.etfoglasiserver.model.User;
+import dev.ksan.etfoglasiserver.repository.DeviceTokenRepo;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class NotificationService {
+
+    private final DeviceTokenRepo deviceTokenRepo;
+    private final FirebaseMessaging firebaseMessaging;
+
+    public void sendToUser(User user, String title, String body)
+            throws FirebaseMessagingException {
+
+        List<DeviceToken> tokens =
+                deviceTokenRepo.findByUserId(user.getId());
+
+        for (DeviceToken token : tokens) {
+
+            Message message = Message.builder()
+                    .setToken(token.getFcmToken())
+                    .putData("title", title)
+                    .putData("body", body)
+                    .build();
+
+            try {
+                String id = firebaseMessaging.send(message);
+                System.out.println("Send:" + id);
+            } catch (FirebaseMessagingException ex) {
+
+                ex.printStackTrace();
+                if (ex.getMessagingErrorCode()
+                        == MessagingErrorCode.UNREGISTERED) {
+                    deviceTokenRepo.delete(token);
+                }
+            }
+        }
+    }
+}

backend/src/main/java/dev/ksan/etfoglasiserver/service/SubjectService.java

@@ -1,5 +1,6 @@
 package dev.ksan.etfoglasiserver.service;
 
+import com.google.firebase.messaging.FirebaseMessagingException;
 import dev.ksan.etfoglasiserver.model.Entry;
 import dev.ksan.etfoglasiserver.model.NotificationMethod;
 import dev.ksan.etfoglasiserver.model.Subject;
@@ -8,22 +9,22 @@ import dev.ksan.etfoglasiserver.repository.SubjectRepo;
 import java.util.List;
 import java.util.UUID;
 
-import dev.ksan.etfoglasiserver.repository.UserRepo;
-import org.simplejavamail.api.mailer.Mailer;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 @Service
 public class SubjectService {
 
   @Autowired private SubjectRepo subjectRepo;
+
   @Autowired
-  private UserRepo userRepo;
+  private NotificationService notificationService;
+
     @Autowired
     private UserService userService;
 
-    @Autowired
-   private MailService mailService;
+
 
   public List<Subject> getSubjects() {
     return subjectRepo.findAll();
@@ -67,29 +68,31 @@ public class SubjectService {
     return subjectRepo.findById(id).orElseThrow(() -> new RuntimeException("Subject not found"));
   }
 
-  public void notify(Entry entry) {
-    List<User> users = userService.findUsersBySubjectId(entry.getSubject().getId());
+
+  //TODO move this and make an EventListener for this
+
+  @Async
+  public void notifyAsync(Entry entry) {
+
+    List<User> users =
+            userService.findUsersBySubjectId(entry.getSubject().getId());
 
     if (users == null || users.isEmpty()) return;
+
     for (User user : users) {
-      if(user.getNotificationMethod() == NotificationMethod.EMAIL)
-        this.sendEmailNotification(entry, user);
-      if(user.getNotificationMethod() == NotificationMethod.PUSH_NOTIFICATION)
-        this.sendPushNotification(entry, user);
-      System.out.println(user.getEmail());
+
+      if (user.getNotificationMethod() != NotificationMethod.PUSH_NOTIFICATION)
+        continue;
+
+      try{
+
+        notificationService.sendToUser(user, entry.getTitle(), entry.getParagraph());
+      }catch (FirebaseMessagingException e) {
+        e.printStackTrace();
+      }
+    }
   }
 
-  }
-
-  public void sendEmailNotification(Entry entry,User user) {
-
-    mailService.sendEmail(user.getEmail(),entry.getTitle(),entry.getParagraph());
-  }
-
-  //todo
-  public void sendPushNotification(Entry entry,User user) {
-    System.out.println("Sending push notification");
-  }
 
   public long count() {
 

backend/src/main/java/dev/ksan/etfoglasiserver/service/UserService.java

@@ -4,6 +4,7 @@ import dev.ksan.etfoglasiserver.dto.JwtResponseDTO;
 import dev.ksan.etfoglasiserver.dto.UserCreationDTO;
 import dev.ksan.etfoglasiserver.dto.UserDTO;
 import dev.ksan.etfoglasiserver.dto.UserLoginDTO;
+import dev.ksan.etfoglasiserver.model.NotificationMethod;
 import dev.ksan.etfoglasiserver.model.Subject;
 import dev.ksan.etfoglasiserver.model.User;
 import dev.ksan.etfoglasiserver.repository.SubjectRepo;
@@ -23,6 +24,7 @@ import org.springframework.security.core.Authentication;
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.server.ResponseStatusException;
 
 @Service
 @Transactional
@@ -61,8 +63,8 @@ public class UserService {
     }
   }
 
-  public UserDTO updateUser(UserCreationDTO user) {
-    Optional<User> existingUserOpt = userRepo.findByEmail(user.getEmail());
+  public UserDTO updateUser(String email, UserCreationDTO user) {
+    Optional<User> existingUserOpt = userRepo.findByEmail(email);
 
     if (userRepo.findByEmail(user.getNewEmail()).isPresent()) {
       throw new RuntimeException("Email taken");
@@ -96,8 +98,12 @@ public class UserService {
     } else throw new RuntimeException("User not found");
   }
 
-  public void deleteUser(UUID userId) {
-    userRepo.deleteById(userId);
+  public void deleteUser(String email) {
+    User  user = userRepo.findByEmail(email).orElseThrow(() -> new RuntimeException("User not found"));
+
+    user.getSubjectSet().clear();
+    userRepo.save(user);
+    userRepo.delete(user);
   }
 
   public UserDTO register(UserCreationDTO user) {
@@ -144,19 +150,18 @@ public class UserService {
 
   public JwtResponseDTO verify(UserLoginDTO user) {
 
-        Authentication authentication = authManager.authenticate(
-                new UsernamePasswordAuthenticationToken(user.getEmail(), user.getPassword())
+    authManager.authenticate(
+            new UsernamePasswordAuthenticationToken(
+                    user.getEmail(),
+                    user.getPassword()
+            )
     );
 
-        if (!authentication.isAuthenticated()) {
-            throw new BadCredentialsException("Invalid username or password");
-        }
+    User foundUser = userRepo.findByEmail(user.getEmail())
+            .orElseThrow(() -> new RuntimeException("User not found"));
 
     String token = jwtService.generateToken(user.getEmail());
 
-        User foundUser = userRepo.findByEmail(user.getEmail())
-                .orElseThrow(() -> new RuntimeException("User not found after authentication"));
-
     return new JwtResponseDTO(
             token,
             foundUser.getEmail(),
@@ -170,9 +175,9 @@ public class UserService {
   }
 
 
-    public UserDTO addSubject(UUID userId, UUID subjectId) {
+    public UserDTO addSubject(String email, UUID subjectId) {
 
-        User user = userRepo.findById(userId)
+        User user = userRepo.findByEmail(email)
                 .orElseThrow(() -> new RuntimeException("User not found"));
 
         Subject subject = subjectRepo.findById(subjectId)
@@ -185,9 +190,9 @@ public class UserService {
         return getUserDTO(user);
     }
 
-    public UserDTO removeSubject(UUID userId, UUID subjectId) {
+    public UserDTO removeSubject(String email, UUID subjectId) {
 
-        User user = userRepo.findById(userId)
+        User user = userRepo.findByEmail(email)
                 .orElseThrow(() -> new RuntimeException("User not found"));
 
         Subject subject = subjectRepo.findById(subjectId)
@@ -200,4 +205,11 @@ public class UserService {
 
         return getUserDTO(user);
     }
+
+  public void updateNotificationType(String email, NotificationMethod notificationType) {
+    User user =  userRepo.findByEmail(email).orElseThrow(() -> new RuntimeException("User not found"));
+
+    user.setNotificationMethod(notificationType);
+    userRepo.save(user);
+  }
 }

backend/src/main/resources/application.properties

@@ -1,5 +0,0 @@
-spring.application.name=etfoglasi-server
-spring.datasource.url=jdbc:postgresql://localhost:5432/etfo-db
-spring.datasource.username=test
-spring.datasource.password=test
-

backend/src/main/resources/application.properties.example

@@ -0,0 +1,8 @@
+spring.application.name=
+
+spring.datasource.url=
+spring.datasource.username=
+spring.datasource.password=
+
+# maybe use > openssl rand -base64 32
+jwt.secret=

backend/src/test/java/dev/ksan/etfoglasiserver/EtfoglasiServerApplicationTests.java

@@ -1,13 +0,0 @@
-package dev.ksan.etfoglasiserver;
-
-import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.context.SpringBootTest;
-
-@SpringBootTest
-class EtfoglasiServerApplicationTests {
-
-    @Test
-    void contextLoads() {
-    }
-
-}

backend/src/test/java/dev/ksan/etfoglasiserver/controller/DeviceTokenControllerTest.java

@@ -0,0 +1,44 @@
+package dev.ksan.etfoglasiserver.controller;
+
+import dev.ksan.etfoglasiserver.model.RegisterTokenRequest;
+import dev.ksan.etfoglasiserver.service.DeviceTokenService;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.userdetails.UserDetails;
+
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class DeviceTokenControllerTest {
+
+    @Mock
+    DeviceTokenService deviceTokenService;
+
+    @InjectMocks
+    DeviceTokenController controller;
+
+    @Test
+    void register_savesNewToken() {
+
+        UserDetails principal = mock(UserDetails.class);
+        when(principal.getUsername()).thenReturn("test@test.com");
+
+        RegisterTokenRequest req = new RegisterTokenRequest();
+        req.setToken("fcm-123");
+
+        ResponseEntity<Void> res = controller.register(req, principal);
+
+        assertEquals(204, res.getStatusCode().value());
+
+        verify(deviceTokenService).registerToken(
+                "test@test.com",
+                "fcm-123"
+        );
+    }
+}

backend/src/test/java/dev/ksan/etfoglasiserver/controller/EntryControllerTest.java

@@ -0,0 +1,156 @@
+package dev.ksan.etfoglasiserver.controller;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import dev.ksan.etfoglasiserver.config.SecurityConfig;
+import dev.ksan.etfoglasiserver.model.Entry;
+import dev.ksan.etfoglasiserver.service.EntryService;
+import dev.ksan.etfoglasiserver.service.JWTService;
+import dev.ksan.etfoglasiserver.service.MyUserDetailsService;
+import dev.ksan.etfoglasiserver.util.SubjectLoader;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.context.annotation.Import;
+import org.springframework.data.domain.PageImpl;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.web.servlet.MockMvc;
+
+
+import java.util.List;
+import java.util.UUID;
+
+import static org.hamcrest.Matchers.anyOf;
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@WebMvcTest(EntryController.class)
+@Import(SecurityConfig.class)
+class EntryControllerTest {
+
+    @Autowired
+    MockMvc mvc;
+
+    @Autowired
+    ObjectMapper objectMapper;
+
+    @MockitoBean
+    EntryService entryService;
+
+    @MockitoBean
+    JWTService jwtService;
+
+
+    @MockitoBean
+    MyUserDetailsService userDetailsService;
+
+    @MockitoBean
+    SubjectLoader subjectLoader;
+
+
+    @Test
+    void getEntries_noParams_returns200() throws Exception {
+        when(entryService.getEntries(null, null, 0))
+                .thenReturn(new PageImpl<>(List.of()));
+
+        mvc.perform(get("/api/entries"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.content").isArray());
+    }
+
+    @Test
+    void getEntries_withSubjectId_parsesUUIDCorrectly() throws Exception {
+        UUID subjectId = UUID.randomUUID();
+        when(entryService.getEntries(eq(subjectId), isNull(), eq(0)))
+                .thenReturn(new PageImpl<>(List.of()));
+
+        mvc.perform(get("/api/entries")
+                        .param("subjectId", subjectId.toString())
+                        .param("page", "0"))
+                .andExpect(status().isOk());
+
+        verify(entryService).getEntries(eq(subjectId), isNull(), eq(0));
+    }
+
+    @Test
+    void getEntries_withGroupName_passesGroupNameToService() throws Exception {
+        when(entryService.getEntries(isNull(), eq("Physics"), eq(0)))
+                .thenReturn(new PageImpl<>(List.of()));
+
+        mvc.perform(get("/api/entries").param("groupName", "Physics"))
+                .andExpect(status().isOk());
+
+        verify(entryService).getEntries(isNull(), eq("Physics"), eq(0));
+    }
+
+    @Test
+    void getEntries_invalidUUID_returns400() throws Exception {
+        mvc.perform(get("/api/entries").param("subjectId", "not-a-uuid"))
+                .andExpect(status().isBadRequest());
+    }
+
+
+    @Test
+    void getGroups_returnsList() throws Exception {
+        when(entryService.getAllGroups()).thenReturn(List.of("Math", "Physics", "CS"));
+
+        mvc.perform(get("/api/groups"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.length()").value(3))
+                .andExpect(jsonPath("$[0]").value("Math"));
+    }
+
+    @Test
+    void getGroups_empty_returns200WithEmptyArray() throws Exception {
+        when(entryService.getAllGroups()).thenReturn(List.of());
+
+        mvc.perform(get("/api/groups"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.length()").value(0));
+    }
+
+
+    @Test
+    @WithMockUser
+    void getEntry_existingId_returns200() throws Exception {
+        Entry entry = new Entry();
+        entry.setTitle("Test Entry");
+
+        when(entryService.getEntryById("entry-1")).thenReturn(entry);
+
+        mvc.perform(get("/api/entries/entry-1"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.title").value("Test Entry"));
+    }
+
+    @Test
+    void getEntry_unauthenticated_returns401or403() throws Exception {
+        mvc.perform(get("/api/entries/entry-1"))
+                .andExpect(status().is(anyOf(equalTo(401), equalTo(403))));
+    }
+
+
+    @Test
+    @WithMockUser
+    void deleteEntry_authenticated_returns200() throws Exception {
+        doNothing().when(entryService).deleteEntry("entry-1");
+
+        mvc.perform(delete("/api/entries/entry-1"))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    void deleteEntry_unauthenticated_returns401or403() throws Exception {
+        mvc.perform(delete("/api/entries/entry-1"))
+                .andExpect(status().is(anyOf(equalTo(401), equalTo(403))));
+    }
+}

backend/src/test/java/dev/ksan/etfoglasiserver/controller/UserControllerTest.java

@@ -0,0 +1,216 @@
+package dev.ksan.etfoglasiserver.controller;
+
+import dev.ksan.etfoglasiserver.config.SecurityConfig;
+import dev.ksan.etfoglasiserver.dto.JwtResponseDTO;
+import dev.ksan.etfoglasiserver.dto.UserCreationDTO;
+import dev.ksan.etfoglasiserver.dto.UserDTO;
+import dev.ksan.etfoglasiserver.dto.UserLoginDTO;
+import dev.ksan.etfoglasiserver.model.User;
+import dev.ksan.etfoglasiserver.service.JWTService;
+import dev.ksan.etfoglasiserver.service.MyUserDetailsService;
+import dev.ksan.etfoglasiserver.service.UserService;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import dev.ksan.etfoglasiserver.util.SubjectLoader;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.context.annotation.Import;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.web.servlet.MockMvc;
+
+import java.util.Optional;
+import java.util.UUID;
+
+import static org.hamcrest.Matchers.anyOf;
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.when;
+import static org.springframework.http.MediaType.APPLICATION_JSON;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@WebMvcTest(UserController.class)
+@Import(SecurityConfig.class)
+class UserControllerTest {
+
+    @Autowired
+    MockMvc mvc;
+
+    @Autowired
+    ObjectMapper objectMapper;
+
+    @MockitoBean
+    SubjectLoader subjectLoader;
+
+    @MockitoBean
+    UserService userService;
+
+    @MockitoBean
+    JWTService jwtService;
+
+    @MockitoBean
+    MyUserDetailsService userDetailsService;
+
+    private static final String EMAIL = "test@example.com";
+
+    @Test
+    void login_validCredentials_returns200WithToken() throws Exception {
+        JwtResponseDTO response = new JwtResponseDTO("jwt-token", EMAIL, "user-id", "OK");
+        when(userService.verify(any(UserLoginDTO.class))).thenReturn(response);
+
+        mvc.perform(post("/api/login")
+                        .contentType(APPLICATION_JSON)
+                        .content("""
+                    {"email":"test@example.com","password":"correct"}
+                """))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.token").value("jwt-token"))
+                .andExpect(jsonPath("$.email").value(EMAIL));
+    }
+
+    @Test
+    void login_badCredentials_returns400() throws Exception {
+        when(userService.verify(any()))
+                .thenThrow(new RuntimeException("bad credentials"));
+
+        mvc.perform(post("/api/login")
+                        .contentType(APPLICATION_JSON)
+                        .content("""
+                    {"email":"test@example.com","password":"wrong"}
+                """))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    void login_nullResponse_returns400() throws Exception {
+        when(userService.verify(any())).thenReturn(null);
+
+        mvc.perform(post("/api/login")
+                        .contentType(APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(
+                                new UserLoginDTO("x@x.com", "p"))))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    void register_newUser_returns201() throws Exception {
+        User user = new User();
+        user.setEmail(EMAIL);
+
+        when(userService.register(any()))
+                .thenReturn(new UserDTO(user));
+
+        mvc.perform(post("/api/register")
+                        .contentType(APPLICATION_JSON)
+                        .content("""
+                    {"email":"test@example.com","password":"pass123"}
+                """))
+                .andExpect(status().isCreated());
+    }
+
+    @Test
+    void register_duplicateEmail_returns400() throws Exception {
+        when(userService.register(any()))
+                .thenThrow(new RuntimeException("Email already exists"));
+
+        mvc.perform(post("/api/register")
+                        .contentType(APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(
+                                new UserCreationDTO("dupe@example.com", "pass"))))
+                .andExpect(status().isBadRequest());
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void getUser_authenticated_returns200() throws Exception {
+        User user = new User();
+        user.setEmail(EMAIL);
+
+        when(userService.getAccountByEmail(EMAIL))
+                .thenReturn(Optional.of(user));
+
+        mvc.perform(get("/api/users/me"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.email").value(EMAIL));
+    }
+
+    @Test
+    void getUser_unauthenticated_returns401or403() throws Exception {
+        mvc.perform(get("/api/users/me"))
+                .andExpect(status().is(anyOf(equalTo(401), equalTo(403))));
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void getUser_notFound_returns404() throws Exception {
+        when(userService.getAccountByEmail(EMAIL))
+                .thenReturn(Optional.empty());
+
+        mvc.perform(get("/api/users/me"))
+                .andExpect(status().isNotFound());
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void updateUser_validBody_returns200() throws Exception {
+        User user = new User();
+        user.setEmail("new@example.com");
+
+        when(userService.updateUser(eq(EMAIL), any()))
+                .thenReturn(new UserDTO(user));
+
+        mvc.perform(put("/api/users/me")
+                        .contentType(APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(
+                                new UserCreationDTO("new@example.com", "newpass"))))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.email").value("new@example.com"));
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void addSubject_validId_returns200() throws Exception {
+        UUID subjectId = UUID.randomUUID();
+
+        User user = new User();
+        user.setEmail(EMAIL);
+
+        when(userService.addSubject(EMAIL, subjectId))
+                .thenReturn(new UserDTO(user));
+
+        mvc.perform(put("/api/users/me/subjects/{id}", subjectId))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void removeSubject_validId_returns200() throws Exception {
+        UUID subjectId = UUID.randomUUID();
+
+        User user = new User();
+        user.setEmail(EMAIL);
+
+        when(userService.removeSubject(EMAIL, subjectId))
+                .thenReturn(new UserDTO(user));
+
+        mvc.perform(delete("/api/users/me/subjects/{id}", subjectId))
+                .andExpect(status().isOk());
+    }
+
+    @Test
+    @WithMockUser(username = EMAIL)
+    void deleteUser_authenticated_returns204() throws Exception {
+        doNothing().when(userService).deleteUser(EMAIL);
+
+        mvc.perform(delete("/api/users/me"))
+                .andExpect(status().isNoContent());
+    }
+}

backend/src/test/java/dev/ksan/etfoglasiserver/service/JWTServiceTest.java

@@ -0,0 +1,62 @@
+package dev.ksan.etfoglasiserver.service;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.TestPropertySource;
+
+import java.lang.reflect.Field;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;
+
+@ExtendWith(MockitoExtension.class)
+class JWTServiceTest {
+
+    private JWTService jwtService;
+
+    private static final String TEST_SECRET =
+            "dGVzdHNlY3JldGtleXRoYXRpc2xvbmdlbm91Z2hmb3JibWFjc2hhMjU2dGVzdGtleQ==";
+
+    @BeforeEach
+    void setUp() throws Exception {
+        jwtService = new JWTService();
+        Field secret = JWTService.class.getDeclaredField("secretKey");
+        secret.setAccessible(true);
+        secret.set(jwtService, TEST_SECRET);
+    }
+
+    @Test
+    void generateToken_extractEmail_returnsCorrectEmail() {
+        String token = jwtService.generateToken("alice@example.com");
+        assertThat(jwtService.extractEmail(token)).isEqualTo("alice@example.com");
+    }
+
+    @Test
+    void validateToken_correctUser_returnsTrue() {
+        String token = jwtService.generateToken("alice@example.com");
+        assertThat(jwtService.validateToken(token, userDetails("alice@example.com"))).isTrue();
+    }
+
+    @Test
+    void validateToken_differentUser_returnsFalse() {
+        String token = jwtService.generateToken("alice@example.com");
+        assertThat(jwtService.validateToken(token, userDetails("bob@example.com"))).isFalse();
+    }
+
+    @Test
+    void validateToken_tamperedToken_throwsException() {
+        String token = jwtService.generateToken("alice@example.com");
+        String tampered = token.substring(0, token.length() - 4) + "XXXX";
+        assertThatThrownBy(() -> jwtService.validateToken(tampered, userDetails("alice@example.com")))
+                .isInstanceOf(Exception.class);
+    }
+
+    private org.springframework.security.core.userdetails.UserDetails userDetails(String email) {
+        return org.springframework.security.core.userdetails.User
+                .withUsername(email).password("x").roles("USER").build();
+    }
+}

backend/src/test/java/dev/ksan/etfoglasiserver/service/NotificationServiceTest.java

@@ -0,0 +1,73 @@
+package dev.ksan.etfoglasiserver.service;
+
+import com.google.firebase.messaging.FirebaseMessaging;
+import com.google.firebase.messaging.FirebaseMessagingException;
+import com.google.firebase.messaging.Message;
+import com.google.firebase.messaging.MessagingErrorCode;
+import dev.ksan.etfoglasiserver.model.DeviceToken;
+import dev.ksan.etfoglasiserver.model.User;
+import dev.ksan.etfoglasiserver.repository.DeviceTokenRepo;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.List;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class NotificationServiceTest {
+
+    @Mock
+    DeviceTokenRepo deviceTokenRepo;
+    @Mock
+    FirebaseMessaging firebaseMessaging;
+    @InjectMocks
+    NotificationService notificationService;
+
+    @Test
+    void sendToUser_sendsMessageForEachToken() throws FirebaseMessagingException {
+        User user = new User();
+        DeviceToken t1 = new DeviceToken(); t1.setFcmToken("token-1");
+        DeviceToken t2 = new DeviceToken(); t2.setFcmToken("token-2");
+
+        when(deviceTokenRepo.findByUserId(user.getId()))
+                .thenReturn(List.of(t1, t2));
+        when(firebaseMessaging.send(any())).thenReturn("msg-id");
+
+        notificationService.sendToUser(user, "Hello", "World");
+
+        verify(firebaseMessaging, times(2)).send(any(Message.class));
+    }
+
+    @Test
+    void sendToUser_deletesStaleToken_whenUnregistered() throws FirebaseMessagingException {
+        User user = new User();
+        DeviceToken token = new DeviceToken();
+        token.setFcmToken("stale-token");
+
+        when(deviceTokenRepo.findByUserId(user.getId()))
+                .thenReturn(List.of(token));
+
+        FirebaseMessagingException ex = mock(FirebaseMessagingException.class);
+        when(ex.getMessagingErrorCode()).thenReturn(MessagingErrorCode.UNREGISTERED);
+        when(firebaseMessaging.send(any())).thenThrow(ex);
+
+        notificationService.sendToUser(user, "Hello", "World");
+
+        verify(deviceTokenRepo).delete(token);
+    }
+
+    @Test
+    void sendToUser_doesNothing_whenUserHasNoTokens() throws FirebaseMessagingException {
+        User user = new User();
+        when(deviceTokenRepo.findByUserId(user.getId())).thenReturn(List.of());
+
+        notificationService.sendToUser(user, "Hello", "World");
+
+        verify(firebaseMessaging, never()).send(any());
+    }
+}

backend/src/test/resources/application-test.properties

@@ -0,0 +1,8 @@
+spring.datasource.url=jdbc:h2:mem:etfo-db;MODE=PostgreSQL;DATABASE_TO_LOWER=TRUE
+spring.datasource.driver-class-name=org.h2.Driver
+spring.datasource.username=test
+spring.datasource.password=test
+spring.jpa.hibernate.ddl-auto=create-drop
+spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
+firebase.enabled=false
+jwt.secret=testkeynekikaojer123451231231231231231231231=

frontend/app.json

@@ -1,17 +1,18 @@
 {
   "expo": {
-    "name": "etfoglasi-frontend",
-    "slug": "etfoglasi-frontend",
+    "name": "etfoglasi",
+    "slug": "etfoglasi",
     "version": "1.0.0",
     "orientation": "portrait",
     "icon": "./assets/images/icon.png",
-    "scheme": "etfoglasifrontend",
+    "scheme": "etfoglasi",
     "userInterfaceStyle": "automatic",
     "newArchEnabled": true,
     "ios": {
       "supportsTablet": true
     },
     "android": {
+      "googleServicesFile": "./google-services.json",
       "adaptiveIcon": {
         "backgroundColor": "#E6F4FE",
         "foregroundImage": "./assets/images/android-icon-foreground.png",
@@ -19,7 +20,8 @@
         "monochromeImage": "./assets/images/android-icon-monochrome.png"
       },
       "edgeToEdgeEnabled": true,
-      "predictiveBackGestureEnabled": false
+      "predictiveBackGestureEnabled": false,
+      "package": "dev.ksan.etfoglasi"
     },
     "web": {
       "output": "static",
@@ -39,7 +41,9 @@
             "backgroundColor": "#000000"
           }
         }
-      ]
+      ],
+      "@react-native-firebase/app",
+      "@react-native-firebase/messaging"
     ],
     "experiments": {
       "typedRoutes": true,
@@ -47,4 +51,3 @@
     }
   }
 }
-

frontend/app/_layout.tsx

@@ -1,13 +1,72 @@
 import "../globals.css";
-import { Stack } from "expo-router";
-import {AuthProvider} from "@/context/AuthContext";
-import {SafeAreaProvider} from "react-native-safe-area-context";
+import { useEffect } from 'react';
+import { Stack } from 'expo-router';
+import { SafeAreaProvider } from 'react-native-safe-area-context';
+import {
+    getMessaging,
+    onMessage,
+    onNotificationOpenedApp,
+    getInitialNotification,
+    setBackgroundMessageHandler,
+} from '@react-native-firebase/messaging';
+import { registerDeviceToken, listenForTokenRefresh, displayLocalNotification } from '@/services/notifications';
+import { AuthProvider, useAuth } from "@/context/AuthContext";
+import Toast from 'react-native-toast-message';
+
+// Registered at module scope so it's installed as soon as this entry file
+// loads, which is required for it to fire while the app is backgrounded/killed.
+setBackgroundMessageHandler(getMessaging(), async (remoteMessage) => {
+    const title = remoteMessage.data?.title as string | undefined;
+    const body = remoteMessage.data?.body as string | undefined;
+    await displayLocalNotification(title, body);
+});
+
+function NotificationSetup() {
+    const { user, loading } = useAuth();
+
+    useEffect(() => {
+        if (loading || !user) return;
+
+        registerDeviceToken(user.token);
+
+        const messaging = getMessaging();
+
+        const unsubRefresh    = listenForTokenRefresh(user.token);
+        const unsubForeground = onMessage(messaging, async (msg) => {
+            console.log('Foreground notification:', msg);
+            Toast.show({
+                type: 'info',
+                text1: (msg.data?.title as string | undefined) ?? 'New Notification',
+                text2: msg.data?.body as string | undefined,
+                position: 'top',
+                visibilityTime: 4000,
+            });
+        });
+
+        onNotificationOpenedApp(messaging, (msg) => {
+            console.log('Opened from background:', msg);
+        });
+
+        getInitialNotification(messaging).then((msg) => {
+            if (msg) console.log('Opened from quit state:', msg);
+        });
+
+        return () => {
+            unsubRefresh();
+            unsubForeground();
+        };
+    }, [user, loading]);
+
+    return null;
+}
 
 export default function RootLayout() {
     return (
         <AuthProvider>
             <SafeAreaProvider>
+                <NotificationSetup />
                 <Stack screenOptions={{ headerShown: false }} />
+                <Toast />
             </SafeAreaProvider>
         </AuthProvider>
     );

frontend/components/UpdatePrompt.tsx

@@ -0,0 +1,138 @@
+// components/UpdatePrompt.tsx
+// ─────────────────────────────────────────────────────────────────────────────
+// Modal that appears when a newer build is available.
+// "Update now" opens the Gitea release page in the browser.
+// "Later" dismisses it for the current session (it reappears next launch).
+// ─────────────────────────────────────────────────────────────────────────────
+
+import React from 'react';
+import {
+    Linking,
+    Modal,
+    Pressable,
+    StyleSheet,
+    Text,
+    View,
+} from 'react-native';
+import type { UpdateInfo } from '../hooks/useUpdatecheck';
+import { version as currentVersion } from '../version.json';
+
+interface Props {
+    updateInfo: UpdateInfo;
+    onDismiss: () => void;
+}
+
+export function UpdatePrompt({ updateInfo, onDismiss }: Props) {
+    function openRelease() {
+        Linking.openURL(updateInfo.releaseUrl).catch(() => {
+            // If the device can't open the URL, just dismiss so the app isn't stuck.
+            onDismiss();
+        });
+    }
+
+    return (
+        <Modal
+            visible
+            transparent
+            animationType="fade"
+            onRequestClose={onDismiss}
+        >
+            <View style={styles.overlay}>
+                <View style={styles.card}>
+                    <Text style={styles.title}>Update available</Text>
+
+                    <Text style={styles.body}>
+                        A new version of the app is available.{'\n'}
+                        You are on build <Text style={styles.bold}>{currentVersion}</Text>,
+                        the latest is build{' '}
+                        <Text style={styles.bold}>{updateInfo.latestVersion}</Text>.
+                    </Text>
+
+                    <View style={styles.actions}>
+                        <Pressable
+                            style={[styles.btn, styles.btnSecondary]}
+                            onPress={onDismiss}
+                            accessibilityRole="button"
+                            accessibilityLabel="Remind me later"
+                        >
+                            <Text style={styles.btnSecondaryText}>Later</Text>
+                        </Pressable>
+
+                        <Pressable
+                            style={[styles.btn, styles.btnPrimary]}
+                            onPress={openRelease}
+                            accessibilityRole="button"
+                            accessibilityLabel="Open the release page to update"
+                        >
+                            <Text style={styles.btnPrimaryText}>Update now</Text>
+                        </Pressable>
+                    </View>
+                </View>
+            </View>
+        </Modal>
+    );
+}
+
+const styles = StyleSheet.create({
+    overlay: {
+        flex: 1,
+        backgroundColor: 'rgba(0,0,0,0.5)',
+        justifyContent: 'center',
+        alignItems: 'center',
+        padding: 24,
+    },
+    card: {
+        width: '100%',
+        maxWidth: 380,
+        backgroundColor: '#fff',
+        borderRadius: 12,
+        padding: 24,
+        shadowColor: '#000',
+        shadowOffset: { width: 0, height: 4 },
+        shadowOpacity: 0.15,
+        shadowRadius: 12,
+        elevation: 8,
+    },
+    title: {
+        fontSize: 18,
+        fontWeight: '700',
+        color: '#111',
+        marginBottom: 12,
+    },
+    body: {
+        fontSize: 15,
+        color: '#444',
+        lineHeight: 22,
+        marginBottom: 24,
+    },
+    bold: {
+        fontWeight: '700',
+        color: '#111',
+    },
+    actions: {
+        flexDirection: 'row',
+        justifyContent: 'flex-end',
+        gap: 12,
+    },
+    btn: {
+        paddingVertical: 10,
+        paddingHorizontal: 20,
+        borderRadius: 8,
+    },
+    btnPrimary: {
+        backgroundColor: '#2563EB',
+    },
+    btnPrimaryText: {
+        color: '#fff',
+        fontWeight: '600',
+        fontSize: 15,
+    },
+    btnSecondary: {
+        backgroundColor: '#F3F4F6',
+    },
+    btnSecondaryText: {
+        color: '#374151',
+        fontWeight: '600',
+        fontSize: 15,
+    },
+});

frontend/config/gitea.tsx

@@ -0,0 +1,10 @@
+export const GITEA_URL = 'https://git.ksan.dev';
+
+export const GITEA_OWNER = 'ksan';
+
+export const GITEA_REPO = 'etf-oglasi';
+
+
+export const RELEASE_TAG_PREFIX = 'mobile-v';
+
+export const UPDATE_CHECK_TIMEOUT_MS = 8_000;

frontend/context/AuthContext.tsx

@@ -1,9 +1,10 @@
 import React, { createContext, useContext, useEffect, useState } from "react";
 import AsyncStorage from "@react-native-async-storage/async-storage";
+import Toast from "react-native-toast-message";
 import {
     authApi,
 
-    LoginPayload, RegisterPayload, subscriptionsApi, UserUpdateDTO,
+    LoginPayload, RegisterPayload, setUnauthorizedHandler, subscriptionsApi, userApi, UserUpdateDTO,
 } from "@/services/api";
 
 type User = {
@@ -11,6 +12,7 @@ type User = {
     email: string;
     token: string;
     subscribedSubjectIds: string[];
+    notificationType: 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION';
 };
 
 type AuthContextValue = {
@@ -23,6 +25,7 @@ type AuthContextValue = {
     unsubscribe: (subjectId: string) => Promise<void>;
     isSubscribed: (subjectId: string) => boolean;
     updateUser: (newEmail?: string, newPassword?: string) => Promise<void>;
+    updateNotificationType: (type: 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION') => Promise<void>;
 };
 
 const AuthContext = createContext<AuthContextValue | null>(null);
@@ -43,17 +46,38 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
         setUser(u);
     };
 
+    useEffect(() => {
+        setUnauthorizedHandler(() => {
+            persist(null);
+            Toast.show({
+                type: 'info',
+                text1: 'Session expired',
+                text2: 'Please sign in again.',
+                position: 'top',
+                visibilityTime: 4000,
+            });
+        });
+        return () => setUnauthorizedHandler(null);
+    }, []);
+
+    const updateNotificationType = async (type: 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION') => {
+        if (!user) return;
+        await userApi.updateNotificationType(type, user.token);
+        await persist({ ...user, notificationType: type });
+    };
+
     const login = async (payload: LoginPayload) => {
         const res = await authApi.login(payload);
-
-        // Gracefully fetch subscriptions — don't block login if this fails
         let subscribedSubjectIds: string[] = [];
+        let notificationType: 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION' = 'PUSH_NOTIFICATION';
+
         if (res.userId) {
             try {
-                const dto = await authApi.getUser(res.userId, res.token);
+                const dto = await authApi.getUser(res.token);
                 subscribedSubjectIds = dto.subjectSet?.map((s) => s.id) ?? [];
-            } catch {
-                // aaaa
+                notificationType = dto.notificationType ?? 'PUSH_NOTIFICATION';
+            } catch (e) {
+                console.error('Failed to load subscriptions on login:', e);
             }
         }
 
@@ -62,12 +86,16 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
             email: res.email,
             token: res.token,
             subscribedSubjectIds,
+            notificationType,
         });
     };
 
     const register = async (payload: RegisterPayload) => {
         await authApi.register(payload);
-        await login({ email: payload.email, password: payload.password });
+        await login({
+            email: payload.email.trim(),
+            password: payload.password.trim(),
+        });
     };
 
     const updateUser = async (newEmail?: string, newPassword?: string) => {
@@ -91,7 +119,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
 
     const subscribe = async (subjectId: string) => {
         if (!user) return;
-        const dto = await subscriptionsApi.subscribe(user.id, subjectId, user.token);
+        const dto = await subscriptionsApi.subscribe( subjectId, user.token);
         const updated = {
             ...user,
             subscribedSubjectIds: dto.subjectSet?.map((s) => s.id) ?? [...user.subscribedSubjectIds, subjectId],
@@ -101,7 +129,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
 
     const unsubscribe = async (subjectId: string) => {
         if (!user) return;
-        const dto = await subscriptionsApi.unsubscribe(user.id, subjectId, user.token);
+        const dto = await subscriptionsApi.unsubscribe( subjectId, user.token);
         const updated = {
             ...user,
             subscribedSubjectIds: dto.subjectSet?.map((s) => s.id) ?? user.subscribedSubjectIds.filter((id) => id !== subjectId),
@@ -113,7 +141,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
         user?.subscribedSubjectIds.includes(subjectId) ?? false;
 
     return (
-        <AuthContext.Provider value={{ user, loading, login, register, logout, subscribe, unsubscribe, isSubscribed, updateUser }}>
+        <AuthContext.Provider value={{ user, loading, login, register, logout, subscribe, unsubscribe, isSubscribed, updateUser, updateNotificationType }}>
             {children}
         </AuthContext.Provider>
     );

frontend/hooks/usePushNotifications.tsx

@@ -0,0 +1,46 @@
+
+import { useEffect } from "react";
+import messaging from "@react-native-firebase/messaging";
+import notifee, { AndroidImportance, EventType } from "@notifee/react-native";
+
+
+async function displayLocalNotification(title?: string, body?: string) {
+    if (!title && !body) return;
+
+    const channelId = await notifee.createChannel({
+        id:         "default",
+        name:       "General",
+        importance: AndroidImportance.HIGH,
+    });
+
+    await notifee.displayNotification({
+        title,
+        body,
+        android: {
+            channelId,
+            pressAction: { id: "default" },
+        },
+    });
+}
+
+
+export function usePushNotifications() {
+    useEffect(() => {
+        const unsubscribeMessage = messaging().onMessage(async remoteMessage => {
+            const title = remoteMessage.data?.title as string | undefined;
+            const body  = remoteMessage.data?.body  as string | undefined;
+            await displayLocalNotification(title, body);
+        });
+
+        const unsubscribeNotifee = notifee.onForegroundEvent(({ type, detail }) => {
+            if (type === EventType.PRESS) {
+                console.log("Notification tapped:", detail.notification);
+            }
+        });
+
+        return () => {
+            unsubscribeMessage();
+            unsubscribeNotifee();
+        };
+    }, []);
+}

frontend/hooks/useUpdatecheck.tsx

@@ -0,0 +1,137 @@
+
+import { useEffect, useState } from 'react';
+import {
+    GITEA_URL,
+    GITEA_OWNER,
+    GITEA_REPO,
+    RELEASE_TAG_PREFIX,
+    UPDATE_CHECK_TIMEOUT_MS,
+} from '../config/gitea';
+import { version as currentVersion } from '../version.json';
+
+export interface UpdateInfo {
+    /** Build number of the latest release (same unit as currentVersion). */
+    latestVersion: number;
+    /** Direct URL the user can open to read the release notes / download the APK. */
+    releaseUrl: string;
+    /** Tag name as stored on Gitea, e.g. "mobile-v42". */
+    tagName: string;
+}
+
+export interface UseUpdateCheckResult {
+    /** True while the API call is in flight. */
+    checking: boolean;
+    /** Populated once the check completes and a newer build exists. */
+    updateInfo: UpdateInfo | null;
+    /** Non-null when the check failed (network error, timeout, bad response). */
+    error: Error | null;
+    /** Re-run the check manually (e.g. from a "check again" button). */
+    recheck: () => void;
+}
+
+// ─── Gitea releases API ──────────────────────────────────────────────────────
+
+interface GiteaRelease {
+    id: number;
+    tag_name: string;
+    name: string;
+    html_url: string;
+    draft: boolean;
+    prerelease: boolean;
+}
+
+async function fetchLatestRelease(): Promise<GiteaRelease> {
+    const url = `${GITEA_URL}/api/v1/repos/${GITEA_OWNER}/${GITEA_REPO}/releases/latest`;
+
+    const controller = new AbortController();
+    const timer = setTimeout(() => controller.abort(), UPDATE_CHECK_TIMEOUT_MS);
+
+    try {
+        const res = await fetch(url, { signal: controller.signal });
+
+        if (!res.ok) {
+            throw new Error(`Gitea API returned HTTP ${res.status}`);
+        }
+
+        return (await res.json()) as GiteaRelease;
+    } finally {
+        clearTimeout(timer);
+    }
+}
+
+/** Parse the integer build number out of a tag like "mobile-v42". Returns NaN if it can't. */
+function parseBuildNumber(tagName: string): number {
+    if (!tagName.startsWith(RELEASE_TAG_PREFIX)) return NaN;
+    return parseInt(tagName.slice(RELEASE_TAG_PREFIX.length), 10);
+}
+
+
+export function useUpdatecheck(): UseUpdateCheckResult {
+    const [checking, setChecking] = useState(false);
+    const [updateInfo, setUpdateInfo] = useState<UpdateInfo | null>(null);
+    const [error, setError] = useState<Error | null>(null);
+    // A counter we bump to re-trigger the effect without changing the dep array shape.
+    const [trigger, setTrigger] = useState(0);
+
+    useEffect(() => {
+        let cancelled = false;
+
+        async function check() {
+            setChecking(true);
+            setError(null);
+
+            try {
+                const release = await fetchLatestRelease();
+
+                if (cancelled) return;
+
+                // Skip drafts and pre-releases.
+                if (release.draft || release.prerelease) {
+                    setUpdateInfo(null);
+                    return;
+                }
+
+                const latestVersion = parseBuildNumber(release.tag_name);
+
+                if (isNaN(latestVersion)) {
+                    // The tag doesn't follow our scheme — ignore it silently.
+                    setUpdateInfo(null);
+                    return;
+                }
+
+                if (latestVersion > currentVersion) {
+                    setUpdateInfo({
+                        latestVersion,
+                        releaseUrl: release.html_url,
+                        tagName: release.tag_name,
+                    });
+                } else {
+                    setUpdateInfo(null);
+                }
+            } catch (err) {
+                if (cancelled) return;
+                // Don't surface AbortError as a real error — it's just a timeout.
+                if (err instanceof Error && err.name === 'AbortError') {
+                    setError(new Error('Update check timed out. Check your connection.'));
+                } else {
+                    setError(err instanceof Error ? err : new Error(String(err)));
+                }
+            } finally {
+                if (!cancelled) setChecking(false);
+            }
+        }
+
+        check();
+
+        return () => {
+            cancelled = true;
+        };
+    }, [trigger]);
+
+    return {
+        checking,
+        updateInfo,
+        error,
+        recheck: () => setTrigger(t => t + 1),
+    };
+}

frontend/index.tsx

@@ -2,24 +2,52 @@
 
 import "./globals.css";
 
-import React from "react";
+import React, { useState } from "react";
 import { useColorScheme } from "react-native";
 import { NavigationContainer, DefaultTheme, DarkTheme } from "@react-navigation/native";
 import { createBottomTabNavigator } from "@react-navigation/bottom-tabs";
 import { Ionicons } from "@expo/vector-icons";
+import { enableScreens } from "react-native-screens";
+import { SafeAreaProvider } from "react-native-safe-area-context";
+import messaging from "@react-native-firebase/messaging";
+import notifee, { AndroidImportance } from "@notifee/react-native";
 
 import SubscribedFeed from "@/screens/SubscribedFeed";
 import AllFeed from "@/screens/AllFeed";
 import Profile from "@/screens/Profile";
-import {enableScreens} from "react-native-screens";
-import {SafeAreaProvider} from "react-native-safe-area-context";
 import AuthGate from "@/screens/AuthGate";
 import { AuthProvider, useAuth } from "@/context/AuthContext";
+import { useUpdatecheck } from "./hooks/useUpdatecheck";
+import { UpdatePrompt } from "./components/UpdatePrompt";
+import { usePushNotifications } from "./hooks/usePushNotifications";
 
+// Handles data-only FCM messages when the app is in the background or closed.
+messaging().setBackgroundMessageHandler(async remoteMessage => {
+    const title = remoteMessage.data?.title as string | undefined;
+    const body  = remoteMessage.data?.body  as string | undefined;
+
+    if (!title && !body) return;
+
+    const channelId = await notifee.createChannel({
+        id:         "default",
+        name:       "General",
+        importance: AndroidImportance.HIGH,
+    });
+
+    await notifee.displayNotification({
+        title,
+        body,
+        android: {
+            channelId,
+            pressAction: { id: "default" },
+        },
+    });
+});
 
 // Must be called before any navigator renders
 enableScreens();
 
+
 const Tab = createBottomTabNavigator();
 
 const LIGHT_TAB = {
@@ -29,6 +57,7 @@ const LIGHT_TAB = {
     inactive: "#8A8278",
     label:    "#1A1714",
 };
+
 const DARK_TAB = {
     bg:       "#161513",
     border:   "#2C2A27",
@@ -37,13 +66,13 @@ const DARK_TAB = {
     label:    "#F0EDE8",
 };
 
-
 function ProfileTab() {
     const { user, loading } = useAuth();
     if (loading) return null;
     return user ? <Profile /> : <AuthGate />;
 }
 
+
 export default function App() {
     const scheme = useColorScheme();
     const dark = scheme === "dark";
@@ -53,6 +82,11 @@ export default function App() {
         ? { ...DarkTheme,   colors: { ...DarkTheme.colors,   background: "#0E0D0C" } }
         : { ...DefaultTheme, colors: { ...DefaultTheme.colors, background: "#FDFAF5" } };
 
+    const { updateInfo } = useUpdatecheck();
+    const [updateDismissed, setUpdateDismissed] = useState(false);
+
+    usePushNotifications();
+
     return (
         <AuthProvider>
             <SafeAreaProvider>
@@ -117,8 +151,16 @@ export default function App() {
                         />
                     </Tab.Navigator>
                 </NavigationContainer>
-        </SafeAreaProvider>
 
+                {/* Overlays the entire app including the tab bar */}
+                {updateInfo && !updateDismissed && (
+                    <UpdatePrompt
+                        updateInfo={updateInfo}
+                        onDismiss={() => setUpdateDismissed(true)}
+                    />
+                )}
+
+            </SafeAreaProvider>
         </AuthProvider>
     );
 }

frontend/package.json

@@ -1,18 +1,21 @@
 {
-  "name": "etfoglasi-frontend",
+  "name": "etfoglasi",
   "main": "expo-router/entry",
   "version": "1.0.0",
   "scripts": {
     "start": "expo start",
     "reset-project": "node ./scripts/reset-project.js",
-    "android": "expo start --android",
-    "ios": "expo start --ios",
+    "android": "expo run:android",
+    "ios": "expo run:ios",
     "web": "expo start --web",
     "lint": "expo lint"
   },
   "dependencies": {
     "@expo/vector-icons": "^15.0.3",
+    "@notifee/react-native": "^9.1.8",
     "@react-native-async-storage/async-storage": "2.2.0",
+    "@react-native-firebase/app": "^24.0.0",
+    "@react-native-firebase/messaging": "^24.0.0",
     "@react-navigation/bottom-tabs": "^7.4.0",
     "@react-navigation/elements": "^2.6.3",
     "@react-navigation/native": "^7.1.8",
@@ -37,6 +40,7 @@
     "react-native-safe-area-context": "~5.6.0",
     "react-native-screens": "~4.16.0",
     "react-native-tailwindcss": "^1.1.11",
+    "react-native-toast-message": "^2.3.3",
     "react-native-web": "~0.21.0",
     "react-native-worklets": "0.5.1",
     "tailwindcss": "^3.4.18"

frontend/screens/AllFeed.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from "react";
+import React, {useCallback, useState} from "react";
 import {
     View, Text, ScrollView, TouchableOpacity,
     ActivityIndicator, useColorScheme,
@@ -7,6 +7,7 @@ import { SafeAreaView } from "react-native-safe-area-context";
 import { Ionicons } from "@expo/vector-icons";
 import SearchBar from "../components/SearchBar";
 import CollapsibleCategory from "../components/CollapsibleCategory";
+import {useFocusEffect} from "expo-router";
 
 
 const GROUPS = [
@@ -40,6 +41,12 @@ export default function AllFeed() {
         setTimeout(() => setRefreshing(false), 800);
     };
 
+    useFocusEffect(
+        useCallback(() => {
+            handleRefresh();
+        }, [])
+    );
+
     return (
         <SafeAreaView className={`flex-1 ${dark ? "bg-obsidian-200" : "bg-parchment-50"}`}>
             {/* Header */}

frontend/screens/AuthGate.tsx

@@ -25,13 +25,19 @@ export default function AuthGate({ onSuccess }: { onSuccess?: () => void }) {
     const accent = dark ? "#E07B45" : "#C4622D";
 
     const submit = async () => {
+
+        const trimmedEmail = email.trim();
+        const trimmedPassword = password.trim();
+
+
+
         setError("");
-        if (!email || !password) { setError("Please fill in all fields."); return; }
+        if (!trimmedEmail || !trimmedPassword) { setError("Please fill in all fields."); return; }
 
         setLoading(true);
         try {
-            if (mode === "login") await login({ email, password });
-            else await register({ email, password, name });
+            if (mode === "login") await login({ email:trimmedEmail, password:trimmedPassword});
+            else await register({ email: trimmedEmail,password:trimmedPassword , name });
             onSuccess?.();
         } catch (e: any) {
             setError(e.message ?? "Something went wrong.");

frontend/screens/Profile.tsx

@@ -23,6 +23,8 @@ type SettingRowProps = {
     accent?: string;
 };
 
+
+
 function SettingRow({ icon, label, value, toggle, toggleValue, onToggle, onPress, accent }: SettingRowProps) {
     const dark = useColorScheme() === "dark";
     const iconColor = accent ?? (dark ? "#706D67" : "#8A8278");
@@ -149,11 +151,25 @@ function GuestProfile({ onSignIn }: { onSignIn: () => void }) {
 function AuthenticatedProfile({ onSignOut }: { onSignOut: () => void }) {
     const [showSubs, setShowSubs] = useState(false);
     const dark = useColorScheme() === "dark";
-    const { user } = useAuth();
-    const [notifications, setNotifications] = React.useState(true);
+    const { user, updateNotificationType } = useAuth();
+    const [notifications, setNotifications] = useState(
+        user?.notificationType === 'PUSH_NOTIFICATION'
+    );
     const [digest, setDigest] = React.useState(false);
     const [showEdit, setShowEdit] = useState(false);
     const [showHelp, setShowHelp] = useState(false);
+
+    const handleNotificationToggle = async (value: boolean) => {
+        setNotifications(value);
+        try {
+            await updateNotificationType(
+                value ? 'PUSH_NOTIFICATION' : 'NO_NOTIFICATION'
+            );
+        } catch {
+            setNotifications(!value); // revert on failure
+        }
+    };
+
     return (
         <>
             <ScrollView contentContainerStyle={{ paddingBottom: 48 }} showsVerticalScrollIndicator={false}>
@@ -197,13 +213,19 @@ function AuthenticatedProfile({ onSignOut }: { onSignOut: () => void }) {
                 >
                     <SectionLabel title="Notifications" />
                     <SettingRow
-                        icon="notifications-outline" label="Push notifications (TODO)"
-                        toggle toggleValue={notifications} onToggle={setNotifications}
+                        icon="notifications-outline"
+                        label="Push notifications"
+                        toggle
+                        toggleValue={notifications}
+                        onToggle={handleNotificationToggle}
                         accent={dark ? "#E07B45" : "#C4622D"}
                     />
                     <SettingRow
-                        icon="mail-outline" label="Daily digest email (TODO)"
-                        toggle toggleValue={digest} onToggle={setDigest}
+                        icon="mail-outline"
+                        label="Weekly Digest email (TODO)"
+                        toggle
+                        toggleValue={digest}
+                        onToggle={setDigest}
                         accent={dark ? "#5E9EF4" : "#3B7DD8"}
                     />
 
@@ -231,32 +253,21 @@ function AuthenticatedProfile({ onSignOut }: { onSignOut: () => void }) {
                         <Text className="text-sm font-sans font-semibold text-red-500">Sign out</Text>
                     </View>
                 </TouchableOpacity>
-
             </ScrollView>
+
             <Modal visible={showEdit} animationType="slide" presentationStyle="pageSheet" onRequestClose={() => setShowEdit(false)}>
                 <EditProfile onClose={() => setShowEdit(false)} />
             </Modal>
-
             <Modal visible={showHelp} animationType="slide" presentationStyle="pageSheet" onRequestClose={() => setShowHelp(false)}>
                 <HelpSupport onClose={() => setShowHelp(false)} />
             </Modal>
-            <Modal
-                visible={showSubs}
-                animationType="slide"
-                presentationStyle="pageSheet"
-                onRequestClose={() => setShowSubs(false)}
-            >
+            <Modal visible={showSubs} animationType="slide" presentationStyle="pageSheet" onRequestClose={() => setShowSubs(false)}>
                 <ManageSubscriptions onClose={() => setShowSubs(false)} />
             </Modal>
         </>
-
-
     );
-
-
 }
 
-
 export default function Profile() {
     const dark = useColorScheme() === "dark";
     const { user, logout } = useAuth();

frontend/screens/SubscribedFeed.tsx

@@ -9,6 +9,7 @@ import SearchBar from "../components/SearchBar";
 import ExpandableItem from "../components/ExpandableItem";
 import { useAuth } from "../context/AuthContext";
 import { Entry, entriesApi } from "../services/api";
+import {useFocusEffect} from "expo-router";
 
 type SortMode = "time" | "subject";
 
@@ -124,9 +125,14 @@ export default function SubscribedFeed() {
         } finally {
             setLoading(false);
         }
-    }, [user?.subscribedSubjectIds]);
+    }, [user?.subscribedSubjectIds?.join(',')]);
 
-    useEffect(() => { fetchFeed(); }, [fetchFeed]);
+    // Always re-fetch when tab gains focus
+    useFocusEffect(
+        useCallback(() => {
+            fetchFeed();
+        }, [fetchFeed])
+    );
 
     // Filter then group
     const filtered = useMemo(() => {
@@ -249,7 +255,7 @@ export default function SubscribedFeed() {
                         <View className="items-center mt-16 px-8">
                             <Text className="text-4xl mb-3">🔍</Text>
                             <Text className={`text-base font-sans font-semibold text-center ${dark ? "text-ink-dark" : "text-ink-light"}`}>
-                                No results for "{query}"
+                                No results for &#34;{query}&#34;
                             </Text>
                         </View>
                     ) : (

frontend/services/api.tsx

@@ -1,11 +1,19 @@
 
-const BASE_URL = process.env.EXPO_PUBLIC_API_URL; // TODO change this
-
+const BASE_URL = process.env.EXPO_PUBLIC_API_URL+'/api';
 
+export type NotificationType = 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION';
 function authHeader(token?: string) {
     return token ? { Authorization: `Bearer ${token}` } : {};
 }
 
+let onUnauthorized: (() => void) | null = null;
+
+// Called once from AuthProvider so api.tsx can trigger a logout/relogin
+// when the backend rejects a request due to a missing/expired/invalid token.
+export function setUnauthorizedHandler(handler: (() => void) | null) {
+    onUnauthorized = handler;
+}
+
 async function request<T>(
     method: string,
     path: string,
@@ -25,7 +33,14 @@ async function request<T>(
         headers: { "Content-Type": "application/json", ...authHeader(token) },
         ...(body ? { body: JSON.stringify(body) } : {}),
     });
-    if (!res.ok) throw new Error(await res.text().catch(() => `HTTP ${res.status}`));
+    if (!res.ok) {
+        const errorText = await res.text().catch(() => `HTTP ${res.status}`);
+        console.log('Failed URL:', res.url);
+        console.log('Status:', res.status);
+        console.log('Response:', errorText);
+        if (res.status === 401 && token) onUnauthorized?.();
+        throw new Error(errorText);
+    }
     return res.json();
 }
 
@@ -65,6 +80,7 @@ export type UserDTO = {
     id: string;
     email: string;
     subjectSet: Subject[];
+    notificationType: NotificationType;
 
 };
 
@@ -103,30 +119,46 @@ export type RegisterPayload = { email: string; password: string; name?: string }
 export const authApi = {
     login: (p: LoginPayload) => post<JwtResponse>("/login", p),
     register: (p: RegisterPayload) => post<UserDTO>("/register", p),
-    getUser: (userId: string, token: string) => get<UserDTO>(`/users/${userId}`, token),
-    updateUser: (body: UserUpdateDTO, token: string) => request<UserDTO>("PUT", "/users", token, body),
+
+    getUser: (token: string) =>
+        get<UserDTO>("/users/me", token),
+
+    updateUser: (body: UserUpdateDTO, token: string) =>
+        request<UserDTO>("PUT", "/users/me", token, body),
+
+    deleteUser: (token: string) =>
+        del<void>("/users/me", token),
 };
 
 
+export const userApi = {
+    updateNotificationType: (
+        type: 'PUSH_NOTIFICATION' | 'NO_NOTIFICATION',
+        token: string
+    ) => post<void>('/users/me/notification-type', { notificationType: type }, token),
+};
 
 export const subjectsApi = {
     getAll: (token?: string) => get<Subject[]>("/subjects", token),
 };
 
 export const subscriptionsApi = {
-    subscribe: (userId: string, subjectId: string, token: string) =>
+    subscribe: (subjectId: string, token: string) =>
         put<UserDTO>(
-            `/users/${userId}/subjects/${subjectId}`,
-            {},        // body placeholder
+            `/users/me/subjects/${subjectId}`,
+            {},
             token
         ),
 
-    unsubscribe: (userId: string, subjectId: string, token: string) =>
+    unsubscribe: (subjectId: string, token: string) =>
         del<UserDTO>(
-            `/users/${userId}/subjects/${subjectId}`,
+            `/users/me/subjects/${subjectId}`,
             token
         ),
 };
+
+
+
 export const entriesApi = {
     getEntries: (params: { subjectId?: string; groupName?: string; page?: number }) =>
         get<SpringPage<Entry>>("/entries", undefined, params),

frontend/services/notifications.tsx

@@ -0,0 +1,55 @@
+import {
+    getMessaging,
+    requestPermission,
+    getToken,
+    onTokenRefresh,
+    AuthorizationStatus,
+} from '@react-native-firebase/messaging';
+import notifee, { AndroidImportance } from '@notifee/react-native';
+import { post } from '@/services/api';
+
+export async function registerDeviceToken(authToken: string): Promise<void> {
+    const messaging = getMessaging();
+    const status = await requestPermission(messaging);
+    const granted =
+        status === AuthorizationStatus.AUTHORIZED ||
+        status === AuthorizationStatus.PROVISIONAL;
+
+    if (!granted) return;
+
+    const fcmToken = await getToken(messaging);
+
+    await fetch(`${process.env.EXPO_PUBLIC_API_URL}/api/device-tokens/register`, {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json',
+            'Authorization': `Bearer ${authToken}`,
+        },
+        body: JSON.stringify({ token: fcmToken }),
+    });
+}
+
+export function listenForTokenRefresh(authToken: string): () => void {
+    return onTokenRefresh(getMessaging(), async (newToken) => {
+        await post('/device-tokens/register', { token: newToken }, authToken);
+    });
+}
+
+export async function displayLocalNotification(title?: string, body?: string) {
+    if (!title && !body) return;
+
+    const channelId = await notifee.createChannel({
+        id: 'default',
+        name: 'General',
+        importance: AndroidImportance.HIGH,
+    });
+
+    await notifee.displayNotification({
+        title,
+        body,
+        android: {
+            channelId,
+            pressAction: { id: 'default' },
+        },
+    });
+}

frontend/version.json

@@ -0,0 +1,3 @@
+{
+  "version": 0
+}