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136 lines
3.5 KiB
Go
136 lines
3.5 KiB
Go
package anthropic
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import (
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"context"
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"errors"
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"fmt"
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"github.com/danielmiessler/fabric/common"
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"github.com/liushuangls/go-anthropic/v2"
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)
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func NewClient() (ret *Client) {
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vendorName := "Anthropic"
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ret = &Client{}
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ret.Configurable = &common.Configurable{
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Label: vendorName,
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EnvNamePrefix: common.BuildEnvVariablePrefix(vendorName),
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ConfigureCustom: ret.configure,
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}
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ret.ApiKey = ret.Configurable.AddSetupQuestion("API key", true)
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// we could provide a setup question for the following settings
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ret.maxTokens = 4096
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ret.defaultRequiredUserMessage = "Hi"
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ret.models = []string{
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anthropic.ModelClaude3Haiku20240307, anthropic.ModelClaude3Opus20240229,
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anthropic.ModelClaude3Opus20240229, anthropic.ModelClaude2Dot0, anthropic.ModelClaude2Dot1,
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anthropic.ModelClaudeInstant1Dot2, "claude-3-5-sonnet-20240620",
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}
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return
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}
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type Client struct {
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*common.Configurable
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ApiKey *common.SetupQuestion
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maxTokens int
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defaultRequiredUserMessage string
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models []string
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client *anthropic.Client
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}
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func (an *Client) configure() (err error) {
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an.client = anthropic.NewClient(an.ApiKey.Value)
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return
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}
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func (an *Client) ListModels() (ret []string, err error) {
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return an.models, nil
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}
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func (an *Client) SendStream(
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msgs []*common.Message, opts *common.ChatOptions, channel chan string,
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) (err error) {
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ctx := context.Background()
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req := an.buildMessagesRequest(msgs, opts)
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req.Stream = true
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if _, err = an.client.CreateMessagesStream(ctx, anthropic.MessagesStreamRequest{
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MessagesRequest: req,
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OnContentBlockDelta: func(data anthropic.MessagesEventContentBlockDeltaData) {
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// fmt.Printf("Stream Content: %s\n", data.Delta.Text)
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channel <- *data.Delta.Text
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},
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}); err != nil {
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var e *anthropic.APIError
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if errors.As(err, &e) {
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fmt.Printf("Messages stream error, type: %s, message: %s", e.Type, e.Message)
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} else {
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fmt.Printf("Messages stream error: %v\n", err)
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}
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} else {
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close(channel)
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}
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return
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}
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func (an *Client) Send(msgs []*common.Message, opts *common.ChatOptions) (ret string, err error) {
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ctx := context.Background()
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req := an.buildMessagesRequest(msgs, opts)
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req.Stream = false
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var resp anthropic.MessagesResponse
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if resp, err = an.client.CreateMessages(ctx, req); err == nil {
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ret = *resp.Content[0].Text
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} else {
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var e *anthropic.APIError
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if errors.As(err, &e) {
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fmt.Printf("Messages error, type: %s, message: %s", e.Type, e.Message)
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} else {
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fmt.Printf("Messages error: %v\n", err)
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}
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}
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return
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}
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func (an *Client) buildMessagesRequest(msgs []*common.Message, opts *common.ChatOptions) (ret anthropic.MessagesRequest) {
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temperature := float32(opts.Temperature)
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topP := float32(opts.TopP)
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messages := an.toMessages(msgs)
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ret = anthropic.MessagesRequest{
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Model: opts.Model,
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Temperature: &temperature,
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TopP: &topP,
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Messages: messages,
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MaxTokens: an.maxTokens,
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}
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return
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}
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func (an *Client) toMessages(msgs []*common.Message) (ret []anthropic.Message) {
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// we could call the method before calling the specific vendor
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normalizedMessages := common.NormalizeMessages(msgs, an.defaultRequiredUserMessage)
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// Iterate over the incoming session messages and process them
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for _, msg := range normalizedMessages {
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var message anthropic.Message
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switch msg.Role {
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case "user":
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message = anthropic.NewUserTextMessage(msg.Content)
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case "system":
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message = anthropic.NewAssistantTextMessage(msg.Content)
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default:
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message = anthropic.NewAssistantTextMessage(msg.Content)
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}
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ret = append(ret, message)
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}
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return
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}
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