re-orgainzied code a little, using go templates instead format string

store.go

@@ -0,0 +1,72 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"io"
+	"log/slog"
+	"os"
+	"strings"
+	tpl "text/template"
+)
+
+func WriteAd(dir string, ad *Ad, template string) error {
+	// prepare output dir
+	dir = dir + "/" + ad.Slug
+	err := Mkdir(dir)
+	if err != nil {
+		return err
+	}
+
+	// write ad file
+	listingfile := strings.Join([]string{dir, "Adlisting.txt"}, "/")
+	f, err := os.Create(listingfile)
+	if err != nil {
+		return err
+	}
+
+	ad.Text = strings.ReplaceAll(ad.Text, "<br/>", "\n")
+
+	tmpl, err := tpl.New("adlisting").Parse(template)
+	if err != nil {
+		return err
+	}
+	err = tmpl.Execute(f, ad)
+	if err != nil {
+		return err
+	}
+
+	slog.Info("wrote ad listing", "listingfile", listingfile)
+
+	return nil
+}
+
+func WriteImage(filename string, reader io.ReadCloser) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, reader)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}