create transactions from AI receipt image recognition results

pkg/llm/openrouter_large_language_model_provider.go

@@ -0,0 +1,45 @@
+package llm
+
+import (
+	"net/http"
+
+	"github.com/mayswind/ezbookkeeping/pkg/core"
+	"github.com/mayswind/ezbookkeeping/pkg/settings"
+)
+
+// OpenRouterLargeLanguageModelProvider defines the structure of OpenRouter large language model provider
+type OpenRouterLargeLanguageModelProvider struct {
+	OpenAIChatCompletionsLargeLanguageModelProvider
+	OpenRouterAPIKey               string
+	ReceiptImageRecognitionModelID string
+}
+
+const openRouterChatCompletionsUrl = "https://openrouter.ai/api/v1/chat/completions"
+
+// BuildChatCompletionsHttpRequest returns the chat completions http request by OpenRouter provider
+func (p *OpenRouterLargeLanguageModelProvider) BuildChatCompletionsHttpRequest(c core.Context, uid int64) (*http.Request, error) {
+	req, err := http.NewRequest("POST", openRouterChatCompletionsUrl, nil)
+
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("Authorization", "Bearer "+p.OpenRouterAPIKey)
+	req.Header.Set("HTTP-Referer", "https://ezbookkeeping.mayswind.net/")
+	req.Header.Set("X-Title", "ezBookkeeping")
+
+	return req, nil
+}
+
+// GetReceiptImageRecognitionModelID returns the receipt image recognition model id of OpenRouter provider
+func (p *OpenRouterLargeLanguageModelProvider) GetReceiptImageRecognitionModelID() string {
+	return p.ReceiptImageRecognitionModelID
+}
+
+// NewOpenRouterLargeLanguageModelProvider creates a new OpenRouter large language model provider instance
+func NewOpenRouterLargeLanguageModelProvider(config *settings.Config) LargeLanguageModelProvider {
+	return newOpenAICommonChatCompletionsHttpLargeLanguageModelProvider(&OpenRouterLargeLanguageModelProvider{
+		OpenRouterAPIKey:               config.OpenRouterAPIKey,
+		ReceiptImageRecognitionModelID: config.OpenRouterReceiptImageRecognitionModelID,
+	})
+}