feat(template): add multiple page support to templates

pkg/svg/storage.go

@@ -2,6 +2,7 @@ package svg
 
 import (
 	"errors"
+	"fmt"
 	"io"
 	"log"
 	"net/http"
@@ -20,7 +21,7 @@ type SvgStorage interface {
 	AddFont(reader io.Reader, format string) error
 	GetFonts() ([]string, error)
 	GetFontsDir() string
-	CreatePublic(data io.Reader, filetype string) (string, error)
+	CreatePublic(data io.Reader, suffix string, filetype string) (string, error)
 	GetPublic(path string) (io.ReadCloser, error)
 	GetPublicDir() http.Dir
 }
@@ -86,13 +87,13 @@ func (f FileSvgStorage) List() ([]os.DirEntry, error) {
 	return os.ReadDir(f.basepath)
 }
 
-func (f FileSvgStorage) CreatePublic(data io.Reader, filetype string) (string, error) {
+func (f FileSvgStorage) CreatePublic(data io.Reader, suffix string, filetype string) (string, error) {
 	path := filepath.Join(f.basepath, f.publicSubPath)
 	if err := os.MkdirAll(path, 0755); err != nil {
 		return "", err
 	}
 
-	file, err := os.CreateTemp(path, "*."+filetype)
+	file, err := os.CreateTemp(path, fmt.Sprintf("*-%s."+filetype, suffix))
 	if err != nil {
 		return "", err
 	}