fix: fix anthropic multiple same rule issue (#138)

README.md

@@ -169,7 +169,7 @@ English | [简体中文](https://github.com/Deeptrain-Community/chatnio/blob/mas
    > - *-v ~/config:/config* mount host machine directory of configuration file, *-v ~/logs:/logs* mount host machine directory of log file,*-v ~/storage:/storage* mount generated files of additional functions
    > - You need to configure MySQL and Redis services, please refer to the information above to modify the environment variables yourself.
     
-    Version Update （_With Watchtower auto-updating enabled, there is no need for manual updates, Just run through the steps above again after execution._）：
+    Version Update (_With Watchtower auto-updating enabled, there is no need for manual updates, Just run through the steps above again after execution._)：
     ```shell
     docker stop chatnio
     docker rm chatnio
@@ -287,16 +287,16 @@ English | [简体中文](https://github.com/Deeptrain-Community/chatnio/blob/mas
 
 ## ✨ Some EXCELLENT Open-source Projects
 > **Frontend projects here refer to projects that focus on user chat interfaces, backend projects refer to projects that focus on API transfer and management, and one-stop projects refer to projects that include user chat interfaces and API transfer and management**
-- [Next Chat @yidadaa](https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web) （Front-end Oriented Projects）
-- [Lobe Chat @arvinxx](https://github.com/lobehub/lobe-chat) （Front-end Oriented Projects）
-- [Chat Box @bin-huang](https://github.com/Bin-Huang/chatbox) （Front-end Oriented Projects）
-- [OpenAI Forward @kenyony](https://github.com/KenyonY/openai-forward) （Back-end Oriented Projects）
-- [One API @justsong](https://github.com/songquanpeng/one-api) （Back-end Oriented Projects）
-- [New API @calon](https://github.com/Calcium-Ion/new-api) （Back-end Oriented Projects）
-- [FastGPT @labring](https://github.com/labring/FastGPT) （Knowledge Base）
-- [Quivr @quivrhq](https://github.com/StanGirard/quivr) （Knowledge Base）
-- [Bingo @weaigc](https://github.com/weaigc/bingo) （Knowledge Base）
-- [Midjourney Proxy @novicezk](https://github.com/novicezk/midjourney-proxy) （Model Library）
+- [Next Chat @yidadaa](https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web) (Front-end Oriented Projects)
+- [Lobe Chat @arvinxx](https://github.com/lobehub/lobe-chat) (Front-end Oriented Projects)
+- [Chat Box @bin-huang](https://github.com/Bin-Huang/chatbox) (Front-end Oriented Projects)
+- [OpenAI Forward @kenyony](https://github.com/KenyonY/openai-forward) (Back-end Oriented Projects)
+- [One API @justsong](https://github.com/songquanpeng/one-api) (Back-end Oriented Projects)
+- [New API @calon](https://github.com/Calcium-Ion/new-api) (Back-end Oriented Projects)
+- [FastGPT @labring](https://github.com/labring/FastGPT) (Knowledge Base)
+- [Quivr @quivrhq](https://github.com/StanGirard/quivr) (Knowledge Base)
+- [Bingo @weaigc](https://github.com/weaigc/bingo) (Knowledge Base)
+- [Midjourney Proxy @novicezk](https://github.com/novicezk/midjourney-proxy) (Model Library)
 
 
 ## 📄 Open Source License

adapter/claude/chat.go

@@ -53,30 +53,43 @@ func (c *ChatInstance) GetTokens(props *adaptercommon.ChatProps) int {
 	return *props.MaxTokens
 }
 
-func (c *ChatInstance) GetMessages(props *adaptercommon.ChatProps) []Message {
+func (c *ChatInstance) ConvertMessages(props *adaptercommon.ChatProps) []globals.Message {
+	// anthropic api: top message must be user message, system message is not allowed
 	start := false
 
-	return utils.Each(props.Message, func(message globals.Message) Message {
-		// anthropic api: top message must be user message, system message is not allowed
+	result := make([]globals.Message, 0)
+
+	for _, message := range props.Message {
+		// if is first message, set it to user message
 		if !start {
 			start = true
-			// set first message to user message
-			if message.Role != globals.User {
-				return Message{
-					Role:    globals.User,
-					Content: message.Content,
-				}
-			}
+			result = append(result, globals.Message{
+				Role:    globals.User,
+				Content: message.Content,
+			})
+			continue
 		}
 
+		// if is system message, set it to user message
 		if message.Role == globals.System {
-			// set system message to user message
-			return Message{
-				Role:    message.Role,
-				Content: message.Content,
-			}
+			message.Role = globals.User
 		}
 
+		// anthropic api does not allow multi-same role messages
+		if len(result) > 0 && result[len(result)-1].Role == message.Role {
+			result[len(result)-1].Content += "\n" + message.Content
+			continue
+		}
+
+		result = append(result, message)
+	}
+
+	return result
+}
+
+func (c *ChatInstance) GetMessages(props *adaptercommon.ChatProps) []Message {
+	converted := c.ConvertMessages(props)
+	return utils.Each(converted, func(message globals.Message) Message {
 		if !globals.IsVisionModel(props.Model) || message.Role != globals.User {
 			return Message{
 				Role:    message.Role,