feat: add mcp client

Author: Angular2Guy

backend/src/main/java/ch/xxx/aidoclibchat/domain/model/dto/McpRequestDto.java

@@ -0,0 +1,15 @@
+/**
+ *    Copyright 2023 Sven Loesekann
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+       http://www.apache.org/licenses/LICENSE-2.0
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+package ch.xxx.aidoclibchat.domain.model.dto;
+
+public record McpRequestDto(String question) { }

backend/src/main/java/ch/xxx/aidoclibchat/domain/model/dto/McpResponseDto.java

@@ -0,0 +1,19 @@
+/**
+ *    Copyright 2023 Sven Loesekann
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+       http://www.apache.org/licenses/LICENSE-2.0
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+package ch.xxx.aidoclibchat.domain.model.dto;
+
+import java.util.List;
+
+import org.springframework.ai.chat.messages.AssistantMessage.ToolCall;
+
+public record McpResponseDto(String answer, List<ToolCall> toolCalls) { }

backend/src/main/java/ch/xxx/aidoclibchat/usecase/service/LocalMcpClient.java

@@ -13,13 +13,31 @@
 package ch.xxx.aidoclibchat.usecase.service;
 
 import java.util.List;
+import java.util.Optional;
 
+import org.springframework.ai.chat.client.ChatClient;
+import org.springframework.ai.mcp.SyncMcpToolCallbackProvider;
+import org.springframework.stereotype.Service;
+
+import ch.xxx.aidoclibchat.domain.model.dto.McpRequestDto;
+import ch.xxx.aidoclibchat.domain.model.dto.McpResponseDto;
 import io.modelcontextprotocol.client.McpSyncClient;
 
+@Service
 public class LocalMcpClient {
-    private final List<McpSyncClient> mcpSyncClients;    
+    private final List<McpSyncClient> mcpSyncClients;   
+    private final ChatClient chatClient; 
 
-    public LocalMcpClient(List<McpSyncClient> mcpSyncClients) {
-        this.mcpSyncClients = mcpSyncClients;        
+    public LocalMcpClient(List<McpSyncClient> mcpSyncClients, ChatClient.Builder chatClientBuilder) {
+        this.mcpSyncClients = mcpSyncClients;
+        this.chatClient = chatClientBuilder.build();
     }    
+
+    public McpResponseDto createResponse(McpRequestDto requestDto) {
+        var result = this.chatClient.prompt(requestDto.question()).toolCallbacks(new SyncMcpToolCallbackProvider(mcpSyncClients)).call();
+        var resultText = Optional.ofNullable(result.chatResponse()).stream().map(value -> value.getResult().getOutput().getText()).findFirst().orElse("");
+        var toolCalls = Optional.ofNullable(result.chatResponse()).stream().map(value -> value.getResult().getOutput().getToolCalls()).findFirst().orElse(List.of());
+        var responseDto = new McpResponseDto(resultText, toolCalls);
+        return responseDto;
+    }
 }