feat:#150 extracted functions rewrote error pipe for feed routes

backend/service/ical/ical.go

@@ -5,23 +5,21 @@ import (
 	"encoding/json"
 	"htwkalender/model"
 	"htwkalender/service/db"
-	"net/http"
 	"time"
 
 	"github.com/jordic/goics"
-	"github.com/labstack/echo/v5"
 	"github.com/pocketbase/pocketbase"
 	"github.com/pocketbase/pocketbase/apis"
 )
 
 const expirationTime = 5 * time.Minute
 
-func Feed(c echo.Context, app *pocketbase.PocketBase, token string) error {
+func Feed(app *pocketbase.PocketBase, token string) (string, error) {
 	var result string
-	var responseWriter = c.Response().Writer
+
 	feed, err := db.FindFeedByToken(token, app)
 	if feed == nil && err != nil {
-		return c.JSON(http.StatusNotFound, err)
+		return "", err
 	}
 
 	modules := make(map[string]model.FeedCollection)
@@ -34,17 +32,11 @@ func Feed(c echo.Context, app *pocketbase.PocketBase, token string) error {
 
 	newFeed, err := createFeedForToken(app, modules)
 	if err != nil {
-		return c.JSON(http.StatusInternalServerError, err)
+		return "", err
 	}
 	result = newFeed.Content
 
-	responseWriter.Header().Set("Content-type", "text/calendar")
-	responseWriter.Header().Set("charset", "utf-8")
-	responseWriter.Header().Set("Content-Disposition", "inline")
-	responseWriter.Header().Set("filename", "calendar.ics")
-	writeSuccess(result, responseWriter)
-	c.Response().Writer = responseWriter
-	return nil
+	return result, nil
 }
 
 func createFeedForToken(app *pocketbase.PocketBase, modules map[string]model.FeedCollection) (*model.FeedModel, error) {
@@ -60,14 +52,6 @@ func createFeedForToken(app *pocketbase.PocketBase, modules map[string]model.Fee
 	return feed, nil
 }
 
-func writeSuccess(message string, w http.ResponseWriter) {
-	w.WriteHeader(http.StatusOK)
-	_, err := w.Write([]byte(message))
-	if err != nil {
-		return
-	}
-}
-
 func CreateIndividualFeed(requestBody []byte, app *pocketbase.PocketBase) (string, error) {
 	var modules []model.FeedCollection