refact

Author: PlexPt

README.md

@@ -117,8 +117,7 @@ implementation group: 'com.github.plexpt', name: 'chatgpt', version: '4.4.0'
                 .temperature(0.9)
                 .build();
         ChatCompletionResponse response = chatGPT.chatCompletion(chatCompletion);
-        Message res = response.getChoices().get(0).getMessage();
-        System.out.println(res);
+        System.out.println(response.toPlainString());
 
 ```
 ### 函数调用（Function Call）

src/main/java/com/plexpt/chatgpt/entity/chat/ChatCompletionResponse.java

@@ -4,8 +4,10 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.plexpt.chatgpt.entity.billing.Usage;
 import lombok.Data;
+import org.springframework.util.CollectionUtils;
 
 import java.util.List;
+import java.util.Optional;
 
 /**
  * chat答案类
@@ -25,4 +27,31 @@ public class ChatCompletionResponse {
     private Usage usage;
     Object logprobs;
 
+
+    public String toPlainString() {
+        if (CollectionUtils.isEmpty(this.getChoices())) {
+            return "";
+        }
+
+
+        return Optional.ofNullable(this.getChoices())
+                .map(e -> e.get(0))
+                .map(ChatChoice::getMessage)
+                .map(Message::getContent)
+                .orElse("");
+    }
+
+    public String toPlainStringStream() {
+        if (CollectionUtils.isEmpty(this.getChoices())) {
+            return "";
+        }
+
+
+        return Optional.ofNullable(this.getChoices())
+                .map(e -> e.get(0))
+                .map(ChatChoice::getDelta)
+                .map(Message::getContent)
+                .orElse("");
+    }
+
 }

src/main/java/com/plexpt/chatgpt/listener/AbstractStreamListener.java

@@ -1,8 +1,6 @@
 package com.plexpt.chatgpt.listener;
 
-import com.plexpt.chatgpt.entity.chat.ChatChoice;
 import com.plexpt.chatgpt.entity.chat.ChatCompletionResponse;
-import com.plexpt.chatgpt.entity.chat.Message;
 import com.plexpt.chatgpt.util.fastjson.JSON;
 import lombok.Getter;
 import lombok.Setter;
@@ -11,8 +9,8 @@
 import okhttp3.Response;
 import okhttp3.sse.EventSource;
 import okhttp3.sse.EventSourceListener;
+import org.springframework.util.StringUtils;
 
-import java.util.List;
 import java.util.Objects;
 import java.util.function.Consumer;
 
@@ -73,15 +71,11 @@ public void onEvent(EventSource eventSource, String id, String type, String data
         }
 
         ChatCompletionResponse response = JSON.parseObject(data, ChatCompletionResponse.class);
-        // 读取Json
-        List<ChatChoice> choices = response.getChoices();
-        if (choices == null || choices.isEmpty()) {
-            return;
-        }
-        Message delta = choices.get(0).getDelta();
-        String text = delta.getContent();
 
-        if (text != null) {
+        String text = response.toPlainStringStream();
+
+        if (!StringUtils.isEmpty(text)) {
+
             lastMessage += text;
 
             onMsg(text);