refactor: migrate loyalty-agent and loyalty-mcp-server components to a new modular structure with updated specs and frontend integration.

This commit is contained in:
2026-07-19 21:43:44 +07:00
parent c3861d6476
commit cda93365ca
128 changed files with 12721 additions and 6343 deletions

6
loyalty-agent/Dockerfile Normal file
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FROM eclipse-temurin:25-jre-alpine
VOLUME /tmp
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} app.jar
EXPOSE 8080
ENTRYPOINT ["java","-jar","/app.jar"]

151
loyalty-agent/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>dev.sonpx.loyalty</groupId>
<artifactId>loyalty-agent-service-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>loyalty-agent</artifactId>
<name>loyalty-agent-service</name>
<description>AI Agent Service to orchestrate Loyalty core system</description>
<dependencies>
<!-- Spring AI MCP Client -->
<dependency>
<groupId>org.springframework.ai</groupId>
<artifactId>spring-ai-starter-mcp-client</artifactId>
</dependency>
<!-- Spring Boot Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- WebSocket -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<!-- Spring AI Ollama -->
<dependency>
<groupId>org.springframework.ai</groupId>
<artifactId>spring-ai-starter-model-ollama</artifactId>
</dependency>
<!-- WebClient (needed for generated API client if library is webclient) -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<!-- OAuth2 Client -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<optional>true</optional>
</dependency>
<!-- MapStruct -->
<dependency>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct</artifactId>
<version>1.6.2</version>
</dependency>
<!-- Spring Boot DevTools -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- Springdoc OpenAPI -->
<dependency>
<groupId>org.springdoc</groupId>
<artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
<version>2.7.0</version>
</dependency>
<!-- Testing -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>1.6.2</version>
</path>
<path>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
<!-- Add generated sources to compile path even when not running gen profile -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>3.5.0</version>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${project.build.directory}/generated-sources/openapi/src/main/java</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

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package dev.sonpx.loyalty.agent;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class LoyaltyAgentApplication {
public static void main(String[] args) {
SpringApplication.run(LoyaltyAgentApplication.class, args);
}
}

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package dev.sonpx.loyalty.agent.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.oauth2.client.OAuth2AuthorizeRequest;
import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
import org.springframework.security.oauth2.client.OAuth2AuthorizedClientManager;
import org.springframework.web.client.RestClient;
@Configuration
public class AgentConfig {
@Value("${loyalty.core.base-url}")
private String coreBaseUrl;
@Bean
public RestClient coreRestClient(OAuth2AuthorizedClientManager authorizedClientManager) {
return RestClient.builder()
.baseUrl(coreBaseUrl)
.requestInterceptor((request, body, execution) -> {
org.springframework.security.core.Authentication principal =
new org.springframework.security.authentication.AnonymousAuthenticationToken(
"key", "loyalty-agent-service",
org.springframework.security.core.authority.AuthorityUtils.createAuthorityList("ROLE_ANONYMOUS"));
OAuth2AuthorizeRequest authorizeRequest = OAuth2AuthorizeRequest
.withClientRegistrationId("keycloak")
.principal(principal)
.build();
try {
OAuth2AuthorizedClient authorizedClient = authorizedClientManager.authorize(authorizeRequest);
if (authorizedClient != null && authorizedClient.getAccessToken() != null) {
request.getHeaders().setBearerAuth(authorizedClient.getAccessToken().getTokenValue());
}
} catch (Exception e) {
e.printStackTrace();
}
return execution.execute(request, body);
})
.build();
}
}

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package dev.sonpx.loyalty.agent.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.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.web.SecurityFilterChain;
@Configuration
@EnableWebSecurity
public class SecurityConfig {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.csrf(csrf -> csrf.disable())
.authorizeHttpRequests(authz -> authz
.requestMatchers("/api/v1/agent/**", "/api/v1/conversations/**", "/ws/**", "/error").permitAll()
.anyRequest().authenticated()
)
.oauth2Login(Customizer.withDefaults())
.oauth2Client(Customizer.withDefaults());
return http.build();
}
}

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package dev.sonpx.loyalty.agent.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
@Override
public void configureMessageBroker(MessageBrokerRegistry config) {
config.enableSimpleBroker("/topic", "/queue");
config.setApplicationDestinationPrefixes("/app");
config.setUserDestinationPrefix("/user");
}
@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
registry.addEndpoint("/ws")
.setAllowedOriginPatterns("*")
.setHandshakeHandler(new org.springframework.web.socket.server.support.DefaultHandshakeHandler() {
@Override
protected java.security.Principal determineUser(org.springframework.http.server.ServerHttpRequest request, org.springframework.web.socket.WebSocketHandler wsHandler, java.util.Map<String, Object> attributes) {
return new java.security.Principal() {
private final String id = java.util.UUID.randomUUID().toString();
@Override
public String getName() {
return id;
}
};
}
});
}
}

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package dev.sonpx.loyalty.agent.controller;
import dev.sonpx.loyalty.agent.service.LoyaltyAgentService;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.Payload;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.CrossOrigin;
@RestController
@CrossOrigin(origins = "*")
public class AgentController {
private final LoyaltyAgentService agentService;
private final org.springframework.web.client.RestClient coreRestClient;
public AgentController(LoyaltyAgentService agentService, org.springframework.web.client.RestClient coreRestClient) {
this.agentService = agentService;
this.coreRestClient = coreRestClient;
}
public record ChatRequest(String conversationId, String messageId, String prompt, String activeCampaignId) {}
@MessageMapping("/chat")
public void chat(@Payload ChatRequest request, java.security.Principal principal) {
agentService.chat(request, principal.getName());
}
@GetMapping("/api/v1/agent/campaigns")
public Object getCampaigns(
@org.springframework.web.bind.annotation.RequestParam(defaultValue = "0") int page,
@org.springframework.web.bind.annotation.RequestParam(defaultValue = "50") int size,
@org.springframework.web.bind.annotation.RequestParam(required = false) String status,
@org.springframework.web.bind.annotation.RequestParam(required = false) String name) {
String url = String.format("/svc/reward/api/campaign/csr/list?page=%d&size=%d", page, size);
if (status != null && !status.isEmpty()) url += "&status=" + status;
if (name != null && !name.isEmpty()) url += "&name=" + name;
String response = coreRestClient.get()
.uri(url)
.retrieve()
.body(String.class);
return standardizeResponse(response);
}
@GetMapping("/api/v1/agent/campaigns/{campaignId}/rules")
public Object getCampaignRules(@org.springframework.web.bind.annotation.PathVariable("campaignId") String campaignId) {
String response = coreRestClient.get()
.uri("/svc/reward/api/campaign-rule/csr/list?page=0&size=100&campaignId.equals=" + campaignId)
.retrieve()
.body(String.class);
return standardizeResponse(response);
}
Object standardizeResponse(String jsonStr) {
try {
com.fasterxml.jackson.databind.ObjectMapper mapper = new com.fasterxml.jackson.databind.ObjectMapper();
com.fasterxml.jackson.databind.JsonNode root = mapper.readTree(jsonStr);
com.fasterxml.jackson.databind.JsonNode arrayNode = root;
if (root.has("content") && root.get("content").isArray()) arrayNode = root.get("content");
else if (root.has("data") && root.get("data").isArray()) arrayNode = root.get("data");
return mapper.convertValue(arrayNode, new com.fasterxml.jackson.core.type.TypeReference<java.util.List<java.util.Map<String, Object>>>() {});
} catch (Exception e) {
return java.util.List.of();
}
}
}

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package dev.sonpx.loyalty.agent.controller;
import dev.sonpx.loyalty.agent.domain.Conversation;
import dev.sonpx.loyalty.agent.domain.Message;
import dev.sonpx.loyalty.agent.repository.ConversationRepository;
import dev.sonpx.loyalty.agent.repository.MessageRepository;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.time.Instant;
import java.util.List;
import java.util.UUID;
@RestController
@RequestMapping("/api/v1/conversations")
@CrossOrigin(origins = "*")
public class ConversationController {
private final ConversationRepository conversationRepository;
private final MessageRepository messageRepository;
public ConversationController(ConversationRepository conversationRepository, MessageRepository messageRepository) {
this.conversationRepository = conversationRepository;
this.messageRepository = messageRepository;
}
@PostMapping
public ResponseEntity<Conversation> createConversation() {
Conversation conversation = new Conversation();
conversation.setId(UUID.randomUUID().toString());
conversation.setCreatedAt(Instant.now());
conversation.setUpdatedAt(Instant.now());
Conversation saved = conversationRepository.save(conversation);
return ResponseEntity.ok(saved);
}
@GetMapping("/{id}/messages")
public ResponseEntity<List<Message>> getMessages(@PathVariable("id") String id) {
List<Message> messages = messageRepository.findByConversationIdOrderByCreatedAtAsc(id);
return ResponseEntity.ok(messages);
}
}

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package dev.sonpx.loyalty.agent.domain;
import com.fasterxml.jackson.annotation.JsonInclude;
@JsonInclude(JsonInclude.Include.NON_NULL)
public record AgentEvent(String type, String messageId, String content, String tool, String status) {
public static AgentEvent token(String messageId, String content) {
return new AgentEvent("TOKEN", messageId, content, null, null);
}
public static AgentEvent toolStatus(String messageId, String tool, String status) {
return new AgentEvent("TOOL_STATUS", messageId, null, tool, status);
}
public static AgentEvent done(String messageId) {
return new AgentEvent("DONE", messageId, null, null, null);
}
public static AgentEvent error(String messageId, String error) {
return new AgentEvent("ERROR", messageId, error, null, null);
}
}

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package dev.sonpx.loyalty.agent.domain;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.Instant;
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Conversation {
private String id;
private Instant createdAt;
private Instant updatedAt;
}

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package dev.sonpx.loyalty.agent.domain;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.Instant;
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Message {
private String id;
private String conversationId;
private String role;
private String content;
private Instant createdAt;
}

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package dev.sonpx.loyalty.agent.repository;
import dev.sonpx.loyalty.agent.domain.Conversation;
import java.util.Optional;
import java.util.List;
public interface ConversationRepository {
Conversation save(Conversation conversation);
Optional<Conversation> findById(String id);
List<Conversation> findAll();
}

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package dev.sonpx.loyalty.agent.repository;
import dev.sonpx.loyalty.agent.domain.Conversation;
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
@Repository
public class InMemoryConversationRepository implements ConversationRepository {
private final Map<String, Conversation> store = new ConcurrentHashMap<>();
@Override
public Conversation save(Conversation conversation) {
store.put(conversation.getId(), conversation);
return conversation;
}
@Override
public Optional<Conversation> findById(String id) {
return Optional.ofNullable(store.get(id));
}
@Override
public List<Conversation> findAll() {
return new ArrayList<>(store.values());
}
}

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package dev.sonpx.loyalty.agent.repository;
import dev.sonpx.loyalty.agent.domain.Message;
import org.springframework.stereotype.Repository;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
@Repository
public class InMemoryMessageRepository implements MessageRepository {
private final Map<String, Message> store = new ConcurrentHashMap<>();
@Override
public Message save(Message message) {
store.put(message.getId(), message);
return message;
}
@Override
public List<Message> findByConversationIdOrderByCreatedAtAsc(String conversationId) {
return store.values().stream()
.filter(m -> conversationId.equals(m.getConversationId()))
.sorted(Comparator.comparing(Message::getCreatedAt))
.collect(Collectors.toList());
}
}

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package dev.sonpx.loyalty.agent.repository;
import dev.sonpx.loyalty.agent.domain.Message;
import java.util.List;
public interface MessageRepository {
Message save(Message message);
List<Message> findByConversationIdOrderByCreatedAtAsc(String conversationId);
}

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package dev.sonpx.loyalty.agent.service;
import org.springframework.ai.chat.client.ChatClient;
import org.springframework.ai.tool.ToolCallbackProvider;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class LoyaltyAgentService {
private final org.springframework.ai.chat.model.ChatModel chatModel;
private final List<ToolCallbackProvider> toolProviders;
private final org.springframework.messaging.simp.SimpMessagingTemplate messagingTemplate;
public LoyaltyAgentService(org.springframework.ai.chat.model.ChatModel chatModel, List<ToolCallbackProvider> toolProviders, org.springframework.messaging.simp.SimpMessagingTemplate messagingTemplate) {
this.chatModel = chatModel;
this.toolProviders = toolProviders;
this.messagingTemplate = messagingTemplate;
}
public void chat(dev.sonpx.loyalty.agent.controller.AgentController.ChatRequest request, String sessionId) {
String prompt = request.prompt();
if (request.activeCampaignId() != null && !request.activeCampaignId().isEmpty()) {
prompt = "Context: Active Campaign ID is " + request.activeCampaignId() + ".\n\n" + prompt;
}
if (request.conversationId() != null && !request.conversationId().isEmpty()) {
prompt = "System Context: The current conversationId (session ID) is " + request.conversationId() + ". You MUST provide this conversationId as a parameter to any tool that requires it.\n\n" + prompt;
}
List<org.springframework.ai.tool.ToolCallback> wrappedTools = new java.util.ArrayList<>();
for (ToolCallbackProvider provider : toolProviders) {
for (org.springframework.ai.tool.ToolCallback tool : provider.getToolCallbacks()) {
wrappedTools.add(new org.springframework.ai.tool.ToolCallback() {
@Override
public org.springframework.ai.tool.definition.ToolDefinition getToolDefinition() {
return tool.getToolDefinition();
}
@Override
public String call(String toolInput) {
messagingTemplate.convertAndSendToUser(sessionId, "/queue/chat-events", dev.sonpx.loyalty.agent.domain.AgentEvent.toolStatus(request.messageId(), tool.getToolDefinition().name(), "running"));
try {
return tool.call(toolInput);
} finally {
messagingTemplate.convertAndSendToUser(sessionId, "/queue/chat-events", dev.sonpx.loyalty.agent.domain.AgentEvent.toolStatus(request.messageId(), tool.getToolDefinition().name(), "done"));
}
}
});
}
}
ChatClient chatClient = ChatClient.builder(chatModel)
.defaultSystem("""
You are an expert Loyalty System AI Assistant.
Your primary job is to orchestrate operations for our Loyalty core system.
CRITICAL RULES:
1. DO NOT create a model.client.dev.sonpx.loyalty.agent.Campaign unless you verify that Member Tiers and Point Pools exist first.
2. Use the `listMemberTiers` tool to check for valid tier IDs.
3. Use the `listPointPools` tool to check for valid pool IDs and ensure they have a sufficient balance.
4. Use the `listStaticAttributes` tool when asked about configurations, properties, or static values.
5. Only use the `createCampaign` tool once verification is complete.
6. Always answer the user in the language they used (e.g., Vietnamese).
7. If a tool response contains a `presentation.content` field, you MUST display its content exactly as provided to the user. Do not summarize or alter its formatting. Use the `data` field only for your internal reasoning.
8. When asked for information, details, or status of an existing campaign, ALWAYS use the `listCampaigns` tool. DO NOT use `createCampaign` unless explicitly asked to create or add a new one.
""")
.defaultTools(wrappedTools)
.build();
chatClient.prompt()
.user(prompt)
.stream()
.content()
.doOnComplete(() -> messagingTemplate.convertAndSendToUser(sessionId, "/queue/chat-events", dev.sonpx.loyalty.agent.domain.AgentEvent.done(request.messageId())))
.subscribe(
content -> {
if (content != null && !content.isEmpty()) {
messagingTemplate.convertAndSendToUser(sessionId, "/queue/chat-events", dev.sonpx.loyalty.agent.domain.AgentEvent.token(request.messageId(), content));
}
},
error -> messagingTemplate.convertAndSendToUser(sessionId, "/queue/chat-events", dev.sonpx.loyalty.agent.domain.AgentEvent.error(request.messageId(), error.getMessage()))
);
}
}

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server:
port: 9332
spring:
mvc:
async:
request-timeout: 3600000
application:
name: loyalty-agent-service
ai:
ollama:
base-url: http://localhost:11434
chat:
options:
model: qwen3.5:2b
temperature: 0.3
mcp:
client:
request-timeout: 60000
enabled: true
type: sync
sse:
connections:
loyalty:
url: ${MCP_SERVER_URL:http://localhost:9331}
security:
oauth2:
client:
registration:
keycloak:
client-id: ols-cli
client-secret: ${KEYCLOAK_CLIENT_SECRET:1jV8NSAeybIqmUK0AWhI8hgdo1q5itj7}
authorization-grant-type: client_credentials
provider:
keycloak:
token-uri: ${KEYCLOAK_TOKEN_URI:http://192.168.99.235/auth/realms/ols-cn-sit/protocol/openid-connect/token}
loyalty:
core:
base-url: ${LOYALTY_CORE_BASE_URL:http://192.168.99.242:8081}
logging:
level:
root: warn
org.springframework.ai: INFO
org.springframework.web: INFO
dev.sonpx.loyalty: DEBUG

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package dev.sonpx.loyalty.agent.controller;
import com.fasterxml.jackson.databind.JsonNode;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class AgentControllerTest {
private final AgentController controller = new AgentController(null, null);
@Test
void testStandardizeResponse_Array() {
String json = "[{\"id\":\"1\"}]";
Object result = controller.standardizeResponse(json);
assertTrue(result instanceof java.util.List);
assertEquals(1, ((java.util.List<?>) result).size());
}
@Test
void testStandardizeResponse_ContentWrapped() {
String json = "{\"content\":[{\"id\":\"1\"}], \"page\":0}";
Object result = controller.standardizeResponse(json);
assertTrue(result instanceof java.util.List);
assertEquals(1, ((java.util.List<?>) result).size());
}
@Test
void testStandardizeResponse_DataWrapped() {
String json = "{\"data\":[{\"id\":\"1\"}]}";
Object result = controller.standardizeResponse(json);
assertTrue(result instanceof java.util.List);
assertEquals(1, ((java.util.List<?>) result).size());
}
}

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package dev.sonpx.loyalty.agent.domain;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class AgentEventTest {
private final ObjectMapper objectMapper = new ObjectMapper();
@Test
void testTokenEventSerialization() throws Exception {
AgentEvent event = AgentEvent.token("msg-123", "Hello");
String json = objectMapper.writeValueAsString(event);
assertTrue(json.contains("\"type\":\"TOKEN\""));
assertTrue(json.contains("\"messageId\":\"msg-123\""));
assertTrue(json.contains("\"content\":\"Hello\""));
assertFalse(json.contains("\"tool\""));
assertFalse(json.contains("\"status\""));
}
@Test
void testToolStatusEventSerialization() throws Exception {
AgentEvent event = AgentEvent.toolStatus("msg-123", "searchTool", "running");
String json = objectMapper.writeValueAsString(event);
assertTrue(json.contains("\"type\":\"TOOL_STATUS\""));
assertTrue(json.contains("\"messageId\":\"msg-123\""));
assertTrue(json.contains("\"tool\":\"searchTool\""));
assertTrue(json.contains("\"status\":\"running\""));
assertFalse(json.contains("\"content\""));
}
@Test
void testDoneEventSerialization() throws Exception {
AgentEvent event = AgentEvent.done("msg-123");
String json = objectMapper.writeValueAsString(event);
assertTrue(json.contains("\"type\":\"DONE\""));
assertTrue(json.contains("\"messageId\":\"msg-123\""));
assertFalse(json.contains("\"content\""));
}
}