#153: Aligning chat & chatStream methods with new ChatParams

pkg/providers/anthropic/chat.go

@@ -56,6 +56,8 @@ func (c *Client) Chat(ctx context.Context, params *schemas.ChatParams) (*schemas
 	chatReq := *c.chatRequestTemplate
 	chatReq.ApplyParams(params)
 
+	chatReq.Stream = false
+
 	chatResponse, err := c.doChatRequest(ctx, &chatReq)
 
 	if err != nil {

pkg/providers/anthropic/chat_stream.go

@@ -12,6 +12,6 @@ func (c *Client) SupportChatStream() bool {
 	return false
 }
 
-func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatStreamRequest) (clients.ChatStream, error) {
+func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatParams) (clients.ChatStream, error) {
 	return nil, clients.ErrChatStreamNotImplemented
 }

pkg/providers/azureopenai/chat.go

@@ -43,6 +43,8 @@ func (c *Client) Chat(ctx context.Context, params *schemas.ChatParams) (*schemas
 	chatReq := *c.chatRequestTemplate // hoping to get a copy of the template
 	chatReq.ApplyParams(params)
 
+	chatReq.Stream = false
+
 	chatResponse, err := c.doChatRequest(ctx, &chatReq)
 
 	if err != nil {

pkg/providers/azureopenai/chat_stream.go

@@ -155,9 +155,10 @@ func (c *Client) SupportChatStream() bool {
 	return true
 }
 
-func (c *Client) ChatStream(ctx context.Context, req *schemas.ChatStreamRequest) (clients.ChatStream, error) {
+func (c *Client) ChatStream(ctx context.Context, params *schemas.ChatParams) (clients.ChatStream, error) {
 	// Create a new chat request
-	httpRequest, err := c.makeStreamReq(ctx, req)
+	httpRequest, err := c.makeStreamReq(ctx, params)
+
 	if err != nil {
 		return nil, err
 	}
@@ -171,28 +172,13 @@ func (c *Client) ChatStream(ctx context.Context, req *schemas.ChatStreamRequest)
 	), nil
 }
 
-func (c *Client) createRequestFromStream(request *schemas.ChatStreamRequest) *ChatRequest {
-	// TODO: consider using objectpool to optimize memory allocation
-	chatRequest := *c.chatRequestTemplate // hoping to get a copy of the template
-
-	chatRequest.Messages = make([]ChatMessage, 0, len(request.MessageHistory)+1)
-
-	// Add items from messageHistory first and the new chat message last
-	for _, message := range request.MessageHistory {
-		chatRequest.Messages = append(chatRequest.Messages, ChatMessage{Role: message.Role, Content: message.Content})
-	}
-
-	chatRequest.Messages = append(chatRequest.Messages, ChatMessage{Role: request.Message.Role, Content: request.Message.Content})
-
-	return &chatRequest
-}
-
-func (c *Client) makeStreamReq(ctx context.Context, req *schemas.ChatStreamRequest) (*http.Request, error) {
-	chatRequest := c.createRequestFromStream(req)
+func (c *Client) makeStreamReq(ctx context.Context, params *schemas.ChatParams) (*http.Request, error) {
+	chatReq := *c.chatRequestTemplate
+	chatReq.ApplyParams(params)
 
-	chatRequest.Stream = true
+	chatReq.Stream = true
 
-	rawPayload, err := json.Marshal(chatRequest)
+	rawPayload, err := json.Marshal(chatReq)
 	if err != nil {
 		return nil, fmt.Errorf("unable to marshal AzureOpenAI chat stream request payload: %w", err)
 	}
@@ -212,7 +198,7 @@ func (c *Client) makeStreamReq(ctx context.Context, req *schemas.ChatStreamReque
 	c.tel.L().Debug(
 		"Stream chat request",
 		zap.String("chatURL", c.chatURL),
-		zap.Any("payload", chatRequest),
+		zap.Any("payload", chatReq),
 	)
 
 	return request, nil

pkg/providers/bedrock/chat.go

@@ -16,12 +16,21 @@ import (
 	"github.com/aws/aws-sdk-go-v2/service/bedrockruntime"
 )
 
-// ChatRequest is an Bedrock-specific request schema
+// ChatRequest is a Bedrock-specific request schema
 type ChatRequest struct {
 	Messages             string               `json:"inputText"`
 	TextGenerationConfig TextGenerationConfig `json:"textGenerationConfig"`
 }
 
+func (r *ChatRequest) ApplyParams(params *schemas.ChatParams) {
+	// message history not yet supported for AWS models
+	// TODO: do something about lack of message history. Maybe just concatenate all messages?
+	// 	in any case, this is not a way to go to ignore message history
+	message := params.Messages[len(params.Messages)-1]
+
+	r.Messages = fmt.Sprintf("Role: %s, Content: %s", message.Role, message.Content)
+}
+
 type TextGenerationConfig struct {
 	Temperature   float64  `json:"temperature"`
 	TopP          float64  `json:"topP"`
@@ -41,38 +50,22 @@ func NewChatRequestFromConfig(cfg *Config) *ChatRequest {
 	}
 }
 
-func NewChatMessagesFromUnifiedRequest(request *schemas.ChatRequest) string {
-	// message history not yet supported for AWS models
-	message := fmt.Sprintf("Role: %s, Content: %s", request.Message.Role, request.Message.Content)
-
-	return message
-}
-
 // Chat sends a chat request to the specified bedrock model.
-func (c *Client) Chat(ctx context.Context, request *schemas.ChatRequest) (*schemas.ChatResponse, error) {
+func (c *Client) Chat(ctx context.Context, params *schemas.ChatParams) (*schemas.ChatResponse, error) {
 	// Create a new chat request
-	chatRequest := c.createChatRequestSchema(request)
+	// TODO: consider using objectpool to optimize memory allocation
+	chatReq := *c.chatRequestTemplate // hoping to get a copy of the template
+	chatReq.ApplyParams(params)
+
+	chatResponse, err := c.doChatRequest(ctx, &chatReq)
 
-	chatResponse, err := c.doChatRequest(ctx, chatRequest)
 	if err != nil {
 		return nil, err
 	}
 
-	if len(chatResponse.ModelResponse.Message.Content) == 0 {
-		return nil, ErrEmptyResponse
-	}
-
 	return chatResponse, nil
 }
 
-func (c *Client) createChatRequestSchema(request *schemas.ChatRequest) *ChatRequest {
-	// TODO: consider using objectpool to optimize memory allocation
-	chatRequest := c.chatRequestTemplate // hoping to get a copy of the template
-	chatRequest.Messages = NewChatMessagesFromUnifiedRequest(request)
-
-	return chatRequest
-}
-
 func (c *Client) doChatRequest(ctx context.Context, payload *ChatRequest) (*schemas.ChatResponse, error) {
 	rawPayload, err := json.Marshal(payload)
 	if err != nil {
@@ -84,6 +77,7 @@ func (c *Client) doChatRequest(ctx context.Context, payload *ChatRequest) (*sche
 		ContentType: aws.String("application/json"),
 		Body:        rawPayload,
 	})
+
 	if err != nil {
 		c.telemetry.Logger.Error("Error: Couldn't invoke model. Here's why: %v\n", zap.Error(err))
 		return nil, err
@@ -92,30 +86,36 @@ func (c *Client) doChatRequest(ctx context.Context, payload *ChatRequest) (*sche
 	var bedrockCompletion ChatCompletion
 
 	err = json.Unmarshal(result.Body, &bedrockCompletion)
+
 	if err != nil {
 		c.telemetry.Logger.Error("failed to parse bedrock chat response", zap.Error(err))
 
 		return nil, err
 	}
 
+	modelResult := bedrockCompletion.Results[0]
+
+	if len(modelResult.OutputText) == 0 {
+		return nil, ErrEmptyResponse
+	}
+
 	response := schemas.ChatResponse{
 		ID:        uuid.NewString(),
 		Created:   int(time.Now().Unix()),
 		Provider:  "aws-bedrock",
 		ModelName: c.config.Model,
 		Cached:    false,
 		ModelResponse: schemas.ModelResponse{
-			Metadata: map[string]string{
-				"system_fingerprint": "none",
-			},
+			Metadata: map[string]string{},
 			Message: schemas.ChatMessage{
 				Role:    "assistant",
-				Content: bedrockCompletion.Results[0].OutputText,
+				Content: modelResult.OutputText,
 			},
 			TokenUsage: schemas.TokenUsage{
-				PromptTokens:   bedrockCompletion.Results[0].TokenCount,
+				// TODO: what would happen if there is a few responses? We need to sum that up
+				PromptTokens:   modelResult.TokenCount,
 				ResponseTokens: -1,
-				TotalTokens:    bedrockCompletion.Results[0].TokenCount,
+				TotalTokens:    modelResult.TokenCount,
 			},
 		},
 	}

pkg/providers/bedrock/chat_stream.go

@@ -12,6 +12,6 @@ func (c *Client) SupportChatStream() bool {
 	return false
 }
 
-func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatStreamRequest) (clients.ChatStream, error) {
+func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatParams) (clients.ChatStream, error) {
 	return nil, clients.ErrChatStreamNotImplemented
 }

pkg/providers/octoml/chat.go

@@ -28,6 +28,11 @@ type ChatRequest struct {
 	PresencePenalty  int                   `json:"presence_penalty,omitempty"`
 }
 
+func (r *ChatRequest) ApplyParams(params *schemas.ChatParams) {
+	r.Messages = params.Messages
+	// TODO(185): set other params
+}
+
 // NewChatRequestFromConfig fills the struct from the config. Not using reflection because of performance penalty it gives
 func NewChatRequestFromConfig(cfg *Config) *ChatRequest {
 	return &ChatRequest{
@@ -36,50 +41,29 @@ func NewChatRequestFromConfig(cfg *Config) *ChatRequest {
 		TopP:             cfg.DefaultParams.TopP,
 		MaxTokens:        cfg.DefaultParams.MaxTokens,
 		StopWords:        cfg.DefaultParams.StopWords,
-		Stream:           false, // unsupported right now
 		FrequencyPenalty: cfg.DefaultParams.FrequencyPenalty,
 		PresencePenalty:  cfg.DefaultParams.PresencePenalty,
 	}
 }
 
-func NewChatMessagesFromUnifiedRequest(request *schemas.ChatRequest) []ChatMessage {
-	messages := make([]ChatMessage, 0, len(request.MessageHistory)+1)
-
-	// Add items from messageHistory first and the new chat message last
-	for _, message := range request.MessageHistory {
-		messages = append(messages, ChatMessage{Role: message.Role, Content: message.Content})
-	}
-
-	messages = append(messages, ChatMessage{Role: request.Message.Role, Content: request.Message.Content})
-
-	return messages
-}
-
 // Chat sends a chat request to the specified octoml model.
-func (c *Client) Chat(ctx context.Context, request *schemas.ChatRequest) (*schemas.ChatResponse, error) {
+func (c *Client) Chat(ctx context.Context, params *schemas.ChatParams) (*schemas.ChatResponse, error) {
 	// Create a new chat request
-	chatRequest := c.createChatRequestSchema(request)
+	// TODO: consider using objectpool to optimize memory allocation
+	chatReq := *c.chatRequestTemplate // hoping to get a copy of the template
+	chatReq.ApplyParams(params)
+
+	chatReq.Stream = false
+
+	chatResponse, err := c.doChatRequest(ctx, &chatReq)
 
-	chatResponse, err := c.doChatRequest(ctx, chatRequest)
 	if err != nil {
 		return nil, err
 	}
 
-	if len(chatResponse.ModelResponse.Message.Content) == 0 {
-		return nil, ErrEmptyResponse
-	}
-
 	return chatResponse, nil
 }
 
-func (c *Client) createChatRequestSchema(request *schemas.ChatRequest) *ChatRequest {
-	// TODO: consider using objectpool to optimize memory allocation
-	chatRequest := c.chatRequestTemplate // hoping to get a copy of the template
-	chatRequest.Messages = NewChatMessagesFromUnifiedRequest(request)
-
-	return chatRequest
-}
-
 func (c *Client) doChatRequest(ctx context.Context, payload *ChatRequest) (*schemas.ChatResponse, error) {
 	// Build request payload
 	rawPayload, err := json.Marshal(payload)
@@ -121,33 +105,39 @@ func (c *Client) doChatRequest(ctx context.Context, payload *ChatRequest) (*sche
 	}
 
 	// Parse the response JSON
-	var openAICompletion openai.ChatCompletion // Octo uses the same response schema as OpenAI
+	var completion openai.ChatCompletion // Octo uses the same response schema as OpenAI
 
-	err = json.Unmarshal(bodyBytes, &openAICompletion)
+	err = json.Unmarshal(bodyBytes, &completion)
 	if err != nil {
 		c.telemetry.Logger.Error("failed to parse openai chat response", zap.Error(err))
 		return nil, err
 	}
 
+	modelChoice := completion.Choices[0]
+
+	if len(modelChoice.Message.Content) == 0 {
+		return nil, ErrEmptyResponse
+	}
+
 	// Map response to UnifiedChatResponse schema
 	response := schemas.ChatResponse{
-		ID:        openAICompletion.ID,
-		Created:   openAICompletion.Created,
+		ID:        completion.ID,
+		Created:   completion.Created,
 		Provider:  providerName,
-		ModelName: openAICompletion.ModelName,
+		ModelName: completion.ModelName,
 		Cached:    false,
 		ModelResponse: schemas.ModelResponse{
 			Metadata: map[string]string{
-				"system_fingerprint": openAICompletion.SystemFingerprint,
+				"system_fingerprint": completion.SystemFingerprint,
 			},
 			Message: schemas.ChatMessage{
-				Role:    openAICompletion.Choices[0].Message.Role,
-				Content: openAICompletion.Choices[0].Message.Content,
+				Role:    modelChoice.Message.Role,
+				Content: modelChoice.Message.Content,
 			},
 			TokenUsage: schemas.TokenUsage{
-				PromptTokens:   openAICompletion.Usage.PromptTokens,
-				ResponseTokens: openAICompletion.Usage.CompletionTokens,
-				TotalTokens:    openAICompletion.Usage.TotalTokens,
+				PromptTokens:   completion.Usage.PromptTokens,
+				ResponseTokens: completion.Usage.CompletionTokens,
+				TotalTokens:    completion.Usage.TotalTokens,
 			},
 		},
 	}

pkg/providers/octoml/chat_stream.go

@@ -12,6 +12,6 @@ func (c *Client) SupportChatStream() bool {
 	return false
 }
 
-func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatStreamRequest) (clients.ChatStream, error) {
+func (c *Client) ChatStream(_ context.Context, _ *schemas.ChatParams) (clients.ChatStream, error) {
 	return nil, clients.ErrChatStreamNotImplemented
 }