feat: add frontend + backend + database to retrieve and compute news from Yahoo

backend/internal/ai/openai.go

@@ -0,0 +1,52 @@
+package ai
+
+import (
+	"context"
+
+	openai "github.com/sashabaranov/go-openai"
+)
+
+type openAIProvider struct {
+	client *openai.Client
+	model  string
+}
+
+func newOpenAI(apiKey, model string) *openAIProvider {
+	if model == "" {
+		model = openai.GPT4oMini
+	}
+	return &openAIProvider{
+		client: openai.NewClient(apiKey),
+		model:  model,
+	}
+}
+
+func (p *openAIProvider) Name() string { return "openai" }
+
+func (p *openAIProvider) Summarize(ctx context.Context, prompt string) (string, error) {
+	resp, err := p.client.CreateChatCompletion(ctx, openai.ChatCompletionRequest{
+		Model: p.model,
+		Messages: []openai.ChatCompletionMessage{
+			{Role: openai.ChatMessageRoleUser, Content: prompt},
+		},
+	})
+	if err != nil {
+		return "", err
+	}
+	if len(resp.Choices) == 0 {
+		return "", nil
+	}
+	return resp.Choices[0].Message.Content, nil
+}
+
+func (p *openAIProvider) ListModels(ctx context.Context) ([]string, error) {
+	resp, err := p.client.ListModels(ctx)
+	if err != nil {
+		return nil, err
+	}
+	var models []string
+	for _, m := range resp.Models {
+		models = append(models, m.ID)
+	}
+	return models, nil
+}