Initial commit

src/main/java/dev/mednikov/social/connections/SocialConnectionsApplication.java

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+package dev.mednikov.social.connections;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableAsync;
+
+@EnableAsync
+@SpringBootApplication
+public class SocialConnectionsApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SocialConnectionsApplication.class, args);
+	}
+
+}

src/main/java/dev/mednikov/social/connections/config/CorsConfig.java

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+package dev.mednikov.social.connections.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.cors.CorsConfiguration;
+import org.springframework.web.cors.CorsConfigurationSource;
+import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
+
+import java.util.List;
+
+@Configuration
+public class CorsConfig {
+
+    @Bean
+    public CorsConfigurationSource corsConfigurationSource() {
+        CorsConfiguration configuration = new CorsConfiguration();
+        configuration.addAllowedOrigin("*");
+        configuration.setAllowedMethods(List.of("POST", "PUT", "GET", "OPTIONS", "DELETE"));
+        configuration.setAllowedHeaders(List.of("Authorization", "Content-Type", "Access-Control-Allow-Origin"));
+        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
+        source.registerCorsConfiguration("/**", configuration);
+        return source;
+    }
+
+}

src/main/java/dev/mednikov/social/connections/config/ObjectMapperConfig.java

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+package dev.mednikov.social.connections.config;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ObjectMapperConfig {
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        ObjectMapper objectMapper = new ObjectMapper();
+        return objectMapper;
+    }
+}

src/main/java/dev/mednikov/social/connections/config/SecurityConfig.java

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+package dev.mednikov.social.connections.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.web.SecurityFilterChain;
+
+@Configuration
+@EnableWebSecurity
+public class SecurityConfig {
+
+    @Bean
+    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
+        return http.authorizeHttpRequests(auth -> auth
+                        .requestMatchers("/error/**").permitAll()
+                        .anyRequest().authenticated())
+                .cors(Customizer.withDefaults())
+                .oauth2ResourceServer(oauth2 -> oauth2
+                        .jwt(Customizer.withDefaults()))
+                .build();
+    }
+
+}

src/main/java/dev/mednikov/social/connections/exceptions/ObjectAlreadyExistsException.java

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+package dev.mednikov.social.connections.exceptions;
+
+public class ObjectAlreadyExistsException extends RuntimeException {
+
+    public ObjectAlreadyExistsException(String message) {
+        super(message);
+    }
+
+}

src/main/java/dev/mednikov/social/connections/exceptions/ObjectDoesNotExistException.java

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+package dev.mednikov.social.connections.exceptions;
+
+public class ObjectDoesNotExistException extends RuntimeException {
+
+    public ObjectDoesNotExistException(String message) {
+        super(message);
+    }
+
+}

src/main/java/dev/mednikov/social/connections/web/ApplicationExceptionHandler.java

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+package dev.mednikov.social.connections.web;
+
+import dev.mednikov.social.connections.exceptions.ObjectAlreadyExistsException;
+import dev.mednikov.social.connections.exceptions.ObjectDoesNotExistException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+@ControllerAdvice
+public class ApplicationExceptionHandler {
+
+    @ExceptionHandler(ObjectAlreadyExistsException.class)
+    public ResponseEntity<String> handleObjectAlreadyExistsException(ObjectAlreadyExistsException ex) {
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(ex.getMessage());
+    }
+
+    @ExceptionHandler(ObjectDoesNotExistException.class)
+    public ResponseEntity<String> handleObjectDoesNotExistException(ObjectDoesNotExistException ex) {
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(ex.getMessage());
+    }
+
+}