feat(template): add multiple page support to templates

pkg/svg/actions/download.go

@@ -3,20 +3,32 @@ package actions
 import (
 	"bytes"
 	"log"
+	"strconv"
 
 	"tomatentum.net/svg-templater/pkg/format"
 	"tomatentum.net/svg-templater/pkg/svg"
 )
 
-func ProvideFile(r *TemplateParameters, conversion *format.ConversionParameters) (string, error) {
-	templatedSvgblob, err := Template(r)
+func ProvideFile(r *TemplateParameters, conversion *format.ConversionParameters) ([]string, error) {
+	templatedPages, err := Template(r)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 	log.Printf("Converting %s to format %s (w=%d,h=%d)", r.Id, conversion.Format, conversion.Width, conversion.Height)
-	result, err := format.ConvertByte(templatedSvgblob, *conversion)
-	if err != nil {
-		return "", err
+	filenames := make([]string, len(templatedPages))
+	for i, pagedata := range templatedPages {
+		result, err := format.ConvertByte(pagedata, *conversion)
+		if err != nil {
+			return nil, err
+		}
+		filenames[i], err = svg.Storage.CreatePublic(bytes.NewReader(result), strconv.Itoa(i+1), conversion.Format)
+
+		if err != nil {
+			return nil, err
+		}
+		log.Printf("Converted %s page %d to format %s (w=%d,h=%d)", r.Id, i, conversion.Format, conversion.Width, conversion.Height)
+
 	}
-	return svg.Storage.CreatePublic(bytes.NewReader(result), conversion.Format)
+
+	return filenames, nil
 }