feat(template): add multiple page support to templates

internal/routes/download.go

@@ -17,7 +17,7 @@ type downloadRequest struct {
 }
 
 type downloadResponse struct {
-	Url string
+	Urls []string
 }
 
 func DownloadSVG(w http.ResponseWriter, r *http.Request) {
@@ -73,16 +73,23 @@ func DownloadSVG(w http.ResponseWriter, r *http.Request) {
 		Keys: request.TemplateKeys,
 	}
 
-	filename, err := actions.ProvideFile(&templateParam, &convParam)
+	filenames, err := actions.ProvideFile(&templateParam, &convParam)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
-	urlparsed := getPublicUrl(r, filename)
-	log.Printf("Made %s available as %s\n", id, urlparsed)
-	response := downloadResponse{
-		Url: urlparsed,
+
+	urlsparsed := make([]string, len(filenames))
+	for i, filename := range filenames {
+		urlsparsed[i] = getPublicUrl(r, filename)
+		log.Printf("Made %s page %d available as %s\n", id, i, urlsparsed[i])
+
 	}
+
+	response := downloadResponse{
+		Urls: urlsparsed,
+	}
+
 	w.Header().Add("Content-Type", "application/json")
 	json, err := json.Marshal(response)
 	if err != nil {