114 lines
2.6 KiB
Go
114 lines
2.6 KiB
Go
package llm
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"github.com/paramah/ai_devs4/s01e01/internal/domain"
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)
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// OpenRouterProvider implements domain.LLMProvider for OpenRouter API
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type OpenRouterProvider struct {
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apiKey string
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model string
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baseURL string
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client *http.Client
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}
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// NewOpenRouterProvider creates a new OpenRouter provider
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func NewOpenRouterProvider(apiKey, model string) *OpenRouterProvider {
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return &OpenRouterProvider{
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apiKey: apiKey,
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model: model,
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baseURL: "https://openrouter.ai/api/v1/chat/completions",
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client: &http.Client{},
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}
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}
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type openRouterRequest struct {
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Model string `json:"model"`
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Messages []map[string]interface{} `json:"messages"`
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ResponseFormat *responseFormat `json:"response_format,omitempty"`
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}
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type responseFormat struct {
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Type string `json:"type"`
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JSONSchema interface{} `json:"json_schema,omitempty"`
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}
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type openRouterResponse struct {
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Choices []struct {
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Message struct {
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Content string `json:"content"`
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} `json:"message"`
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} `json:"choices"`
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Error *struct {
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Message string `json:"message"`
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} `json:"error,omitempty"`
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}
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// Complete sends a request to OpenRouter API
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func (p *OpenRouterProvider) Complete(ctx context.Context, request domain.LLMRequest) (*domain.LLMResponse, error) {
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reqBody := openRouterRequest{
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Model: p.model,
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Messages: []map[string]interface{}{
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{
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"role": "user",
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"content": request.Prompt,
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},
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},
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}
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if request.Schema != nil {
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reqBody.ResponseFormat = &responseFormat{
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Type: "json_schema",
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JSONSchema: request.Schema,
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}
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}
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jsonData, err := json.Marshal(reqBody)
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if err != nil {
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return nil, fmt.Errorf("marshaling request: %w", err)
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, p.baseURL, bytes.NewBuffer(jsonData))
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if err != nil {
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return nil, fmt.Errorf("creating request: %w", err)
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Authorization", "Bearer "+p.apiKey)
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resp, err := p.client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("sending request: %w", err)
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}
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defer resp.Body.Close()
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("reading response: %w", err)
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}
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var apiResp openRouterResponse
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if err := json.Unmarshal(body, &apiResp); err != nil {
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return nil, fmt.Errorf("unmarshaling response: %w", err)
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}
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if apiResp.Error != nil {
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return nil, fmt.Errorf("API error: %s", apiResp.Error.Message)
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}
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if len(apiResp.Choices) == 0 {
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return nil, fmt.Errorf("no choices in response")
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}
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return &domain.LLMResponse{
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Content: apiResp.Choices[0].Message.Content,
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}, nil
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}
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