prepare for google translate

app/service/productDescriptionService/productDescriptionService.go

@@ -5,32 +5,76 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
-	"net/http"
+	"log"
+	"os"
 	"slices"
 	"strings"
-	"time"
 
+	"git.ma-al.com/goc_daniel/b2b/app/config"
 	"git.ma-al.com/goc_daniel/b2b/app/db"
 	"git.ma-al.com/goc_daniel/b2b/app/model"
 	"git.ma-al.com/goc_daniel/b2b/app/service/langsService"
 	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
+	"google.golang.org/api/option"
 	"gorm.io/gorm"
 
-	"github.com/openai/openai-go/v3"
-	"github.com/openai/openai-go/v3/option"
-	"github.com/openai/openai-go/v3/responses"
+	// [START translate_v3_import_client_library]
+	"cloud.google.com/go/auth/credentials"
+	translate "cloud.google.com/go/translate/apiv3"
+	"cloud.google.com/go/translate/apiv3/translatepb"
+	// [END translate_v3_import_client_library]
 )
 
 type ProductDescriptionService struct {
-	db     *gorm.DB
-	client openai.Client
+	db        *gorm.DB
+	ctx       context.Context
+	googleCli translate.TranslationClient
+	// projectID is the Google Cloud project ID used as the "parent" in API calls,
+	// e.g. "projects/my-project-123/locations/global"
+	projectID string
 }
 
+// New creates a ProductDescriptionService and authenticates against the
+// Google Cloud Translation API using a service account key file.
+//
+// Required configuration (set in .env or environment):
+//
+//	GOOGLE_APPLICATION_CREDENTIALS  – absolute path to the service account JSON key file
+//	GOOGLE_CLOUD_PROJECT_ID         – your Google Cloud project ID
+//
+// The service account must have the "Cloud Translation API User" role
+// (roles/cloudtranslate.user) granted in Google Cloud IAM.
 func New() *ProductDescriptionService {
+	ctx := context.Background()
+	cfg := config.Get()
+
+	// Read the service account key file whose path comes from config / env.
+	data, err := os.ReadFile(cfg.GoogleTranslate.CredentialsFile)
+	if err != nil {
+		log.Fatalf("productDescriptionService: cannot read credentials file %q: %v",
+			cfg.GoogleTranslate.CredentialsFile, err)
+	}
+
+	// Build OAuth2 credentials scoped to the Cloud Translation API.
+	// The correct scope for Cloud Translation v3 is "cloud-translation".
+	creds, err := credentials.DetectDefault(&credentials.DetectOptions{
+		Scopes:          []string{"https://www.googleapis.com/auth/cloud-translation"},
+		CredentialsJSON: data,
+	})
+	if err != nil {
+		log.Fatalf("productDescriptionService: cannot build Google credentials: %v", err)
+	}
+
+	googleCli, err := translate.NewTranslationClient(ctx, option.WithAuthCredentials(creds))
+	if err != nil {
+		log.Fatalf("productDescriptionService: cannot create Translation client: %v", err)
+	}
+
 	return &ProductDescriptionService{
-		db: db.Get(),
-		client: openai.NewClient(option.WithAPIKey("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"),
-			option.WithHTTPClient(&http.Client{Timeout: 300 * time.Second})),
+		db:        db.Get(),
+		ctx:       ctx,
+		googleCli: *googleCli,
+		projectID: cfg.GoogleTranslate.ProjectID,
 	}
 }
 
@@ -102,7 +146,12 @@ func (s *ProductDescriptionService) SaveProductDescription(userID uint, productI
 	return nil
 }
 
-// Updates relevant fields with the "updates" map
+// TranslateProductDescription fetches the product description for productFromLangID,
+// translates every text field into productToLangID using the Google Cloud
+// Translation API (v3 TranslateText), and returns the translated record.
+//
+// The Google Cloud project must have the Cloud Translation API enabled and the
+// service account must hold the "Cloud Translation API User" role.
 func (s *ProductDescriptionService) TranslateProductDescription(userID uint, productID uint, productShopID uint, productFromLangID uint, productToLangID uint) (*model.ProductDescription, error) {
 	var ProductDescription model.ProductDescription
 
@@ -148,21 +197,36 @@ func (s *ProductDescriptionService) TranslateProductDescription(userID uint, pro
 	}
 	request = cleanForPrompt(request)
 
-	openai_response, _ := s.client.Responses.New(context.Background(), responses.ResponseNewParams{
-		Input: responses.ResponseNewParamsInputUnion{OfString: openai.String(request)},
-		Model: openai.ChatModelGPT4_1Mini,
-		// Model: openai.ChatModelGPT4_1Nano,
-	})
-	if openai_response.Status != "completed" {
-		return nil, responseErrors.ErrOpenAIResponseFail
+	// TranslateText is the standard Cloud Translation v3 endpoint.
+	// "parent" must be "projects/<PROJECT_ID>/locations/global" (or a specific region).
+	// MimeType "text/plain" is used because cleanForPrompt strips HTML attributes;
+	// switch to "text/html" if you want Google to preserve HTML tags automatically.
+	req := &translatepb.TranslateTextRequest{
+		Parent:             fmt.Sprintf("projects/%s/locations/global", s.projectID),
+		TargetLanguageCode: lang.ISOCode,
+		MimeType:           "text/plain",
+		Contents:           []string{request},
+	}
+	responseGoogle, err := s.googleCli.TranslateText(s.ctx, req)
+	if err != nil {
+		fmt.Println(err)
+		return nil, err
 	}
 
+	// TranslateText returns one Translation per input string.
+	if len(responseGoogle.GetTranslations()) == 0 {
+		return nil, responseErrors.ErrOpenAIBadOutput
+	}
+	response := responseGoogle.GetTranslations()[0].GetTranslatedText()
+
 	for i := 0; i < len(keys); i++ {
-		success, resolution := resolveResponse(*fields[i], openai_response.OutputText(), keys[i])
+		success, resolution := resolveResponse(*fields[i], response, keys[i])
 		if !success {
 			return nil, responseErrors.ErrOpenAIBadOutput
 		}
 		*fields[i] = resolution
+
+		fmt.Println("resolution: ", resolution)
 	}
 
 	return &ProductDescription, nil