feat:#150 added slog for more functions and improved return signature

backend/service/fetch/v1/fetchSeminarGroupService.go

@@ -3,13 +3,12 @@ package v1
 import (
 	"encoding/xml"
 	"fmt"
-	"github.com/labstack/echo/v5"
 	"github.com/pocketbase/pocketbase"
-	"github.com/pocketbase/pocketbase/apis"
 	"github.com/pocketbase/pocketbase/models"
 	"htwkalender/model"
 	"htwkalender/service/db"
 	"io"
+	"log/slog"
 	"net/http"
 )
 
@@ -41,12 +40,23 @@ func getSeminarHTML(semester string) (string, error) {
 
 }
 
-func SeminarGroups(c echo.Context, app *pocketbase.PocketBase) error {
+func FetchSeminarGroups(app *pocketbase.PocketBase) ([]*models.Record, error) {
 	var groups []model.SeminarGroup
 
-	resultSummer, _ := getSeminarHTML("ss")
+	resultSummer, err := getSeminarHTML("ss")
+
+	if err != nil {
+		slog.Error("Error while fetching seminar groups for winter semester", err)
+		return nil, err
+	}
+
 	resultWinter, _ := getSeminarHTML("ws")
 
+	if err != nil {
+		slog.Error("Error while fetching seminar groups for summer semester", err)
+		return nil, err
+	}
+
 	groups = parseSeminarGroups(resultSummer)
 	groups = append(groups, parseSeminarGroups(resultWinter)...)
 
@@ -55,16 +65,18 @@ func SeminarGroups(c echo.Context, app *pocketbase.PocketBase) error {
 
 	collection, dbError := db.FindCollection(app, "groups")
 	if dbError != nil {
-		return apis.NewNotFoundError("Collection not found", dbError)
+		slog.Error("Error while searching collection groups", dbError)
+		return nil, err
 	}
 	var insertedGroups []*models.Record
 
 	insertedGroups, dbError = db.SaveGroups(groups, collection, app)
 	if dbError != nil {
-		return apis.NewNotFoundError("Records could not be saved", dbError)
+		slog.Error("Error while saving groups", dbError)
+		return nil, err
 	}
 
-	return c.JSON(http.StatusOK, insertedGroups)
+	return insertedGroups, nil
 }
 
 func removeDuplicates(groups []model.SeminarGroup) []model.SeminarGroup {