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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| package ai | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "time" | ||
|
|
||
| "github.com/Southclaws/fault" | ||
| "github.com/Southclaws/fault/fctx" | ||
| "github.com/Southclaws/storyden/internal/config" | ||
| "github.com/r3labs/sse/v2" | ||
| ) | ||
|
|
||
| const ( | ||
| DefaultEndpoint = "https://api.perplexity.ai/chat/completions" | ||
| DefautTimeout = 10 * time.Second | ||
| ) | ||
|
|
||
| const ( | ||
| Llama_3_1SonarSmall_128kChat = "llama-3.1-sonar-small-128k-chat" | ||
| Llama_3_1SonarLarge_128kChat = "llama-3.1-sonar-large-128k-chat" | ||
| Llama_3_1SonarSmall_128kOnline = "llama-3.1-sonar-small-128k-online" | ||
| Llama_3_1SonarLarge_128kOnline = "llama-3.1-sonar-large-128k-online" | ||
| Llama_3_1_8bInstruct = "llama-3.1-8b-instruct" | ||
| Llama_3_1_70bInstruct = "llama-3.1-70b-instruct" | ||
| ) | ||
|
|
||
| type Message struct { | ||
| Role string `json:"role"` | ||
| Content string `json:"content"` | ||
| } | ||
|
|
||
| type CompletionRequest struct { | ||
| Messages []Message `json:"messages"` | ||
| Model string `json:"model"` | ||
| } | ||
|
|
||
| type Usage struct { | ||
| PromptTokens int `json:"prompt_tokens"` | ||
| CompletionTokens int `json:"completion_tokens"` | ||
| TotalTokens int `json:"total_tokens"` | ||
| } | ||
|
|
||
| type Choice struct { | ||
| Index int `json:"index"` | ||
| FinishReason string `json:"finish_reason"` | ||
| Message Message `json:"message"` | ||
| Delta Message `json:"delta"` | ||
| } | ||
|
|
||
| type CompletionResponse struct { | ||
| ID string `json:"id"` | ||
| Model string `json:"model"` | ||
| Created int `json:"created"` | ||
| Usage Usage `json:"usage"` | ||
| Citations []string `json:"citations"` | ||
| Object string `json:"object"` | ||
| Choices []Choice `json:"choices"` | ||
| } | ||
|
|
||
| type Perplexity struct { | ||
| endpoint string | ||
| apiKey string | ||
| model string | ||
| httpClient *http.Client | ||
| httpTimeout time.Duration | ||
| } | ||
|
|
||
| func newPerplexity(cfg config.Config) (*Perplexity, error) { | ||
| s := &Perplexity{ | ||
| apiKey: cfg.OpenAIKey, | ||
| endpoint: DefaultEndpoint, | ||
| model: Llama_3_1SonarSmall_128kChat, | ||
| httpClient: &http.Client{}, | ||
| httpTimeout: DefautTimeout, | ||
| } | ||
| return s, nil | ||
| } | ||
|
|
||
| func (s *Perplexity) Prompt(ctx context.Context, input string) (*Result, error) { | ||
| r := &CompletionResponse{} | ||
|
|
||
| reqBody := CompletionRequest{ | ||
| Messages: []Message{{Role: "user", Content: input}}, | ||
| Model: s.model, | ||
| } | ||
|
|
||
| requestBody, err := json.Marshal(reqBody) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to marshal request body: %w", err) | ||
| } | ||
|
|
||
| ctx, cancel := context.WithDeadline(ctx, time.Now().Add(s.httpTimeout)) | ||
| defer cancel() | ||
|
|
||
| req, err := http.NewRequestWithContext(ctx, "POST", s.endpoint, bytes.NewBuffer(requestBody)) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to create request: %w", err) | ||
| } | ||
|
|
||
| req.Header.Set("Authorization", "Bearer "+s.apiKey) | ||
| req.Header.Set("Content-Type", "application/json") | ||
|
|
||
| resp, err := s.httpClient.Do(req) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to send request: %w", err) | ||
| } | ||
| defer resp.Body.Close() | ||
|
|
||
| if resp.StatusCode != http.StatusOK { | ||
| if resp.StatusCode == http.StatusUnauthorized { | ||
| return nil, fmt.Errorf("unauthorized: check your API key") | ||
| } | ||
| return nil, fmt.Errorf("unexpected status code: %d", resp.StatusCode) | ||
| } | ||
|
|
||
| body, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to read response body: %w", err) | ||
| } | ||
|
|
||
| err = json.Unmarshal(body, r) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshal response body: %w - body response=%s", err, string(body)) | ||
| } | ||
|
|
||
| return &Result{ | ||
| Answer: r.Choices[0].Message.Content, | ||
| }, nil | ||
| } | ||
|
|
||
| func (s *Perplexity) PromptStream(ctx context.Context, input string) (chan string, chan error) { | ||
| outch := make(chan string) | ||
| errch := make(chan error) | ||
|
|
||
| client := sse.NewClient(DefaultEndpoint) | ||
|
|
||
| eventch := make(chan *sse.Event) | ||
|
|
||
| go func() { | ||
| err := client.SubscribeChan("completions", eventch) | ||
| if err != nil { | ||
| errch <- fault.Wrap(err, fctx.With(ctx)) | ||
| return | ||
| } | ||
|
|
||
| client.Unsubscribe(eventch) | ||
|
|
||
| for e := range eventch { | ||
| var cr CompletionResponse | ||
|
|
||
| if err := json.Unmarshal(e.Data, &cr); err != nil { | ||
| errch <- fault.Wrap(err, fctx.With(ctx)) | ||
| return | ||
| } | ||
|
|
||
| fmt.Println(cr.Citations) | ||
|
|
||
| outch <- cr.Choices[0].Delta.Content | ||
|
|
||
| if cr.Choices[0].FinishReason == "stop" { | ||
| client.Unsubscribe(eventch) | ||
| break | ||
| } | ||
| } | ||
|
|
||
| close(outch) | ||
| close(errch) | ||
| close(eventch) | ||
| }() | ||
|
|
||
| return outch, errch | ||
| } | ||
|
|
||
| func (o *Perplexity) EmbeddingFunc() func(ctx context.Context, text string) ([]float32, error) { | ||
| panic("not implemented") | ||
| } |