feat(template): add multiple page support to templates

pkg/svg/actions/template.go

@@ -2,7 +2,6 @@ package actions
 
 import (
 	"errors"
-	"io"
 	"log"
 	"maps"
 	"regexp"
@@ -18,29 +17,42 @@ type TemplateParameters struct {
 	Keys map[string]string
 }
 
-func Template(r *TemplateParameters) ([]byte, error) {
-	mapkeys := slices.Collect(maps.Keys(r.Keys))
-	ok, err := verifyTemplate(r.Id, mapkeys)
+func Template(r *TemplateParameters) ([][]byte, error) {
+
+	data, err := database.GetSpecificSVG(r.Id)
+
 	if err != nil {
 		return nil, err
 	}
+
+	mapkeys := slices.Collect(maps.Keys(r.Keys))
+	ok, err := verifyTemplate(data, mapkeys)
+
+	if err != nil {
+		return nil, err
+	}
+
 	if !ok {
 		return nil, errors.New("Template does not exist.")
 	}
 	log.Printf("Replacing keys of %s template\n", r.Id)
 
-	reader, err := svg.Storage.Get(r.Id)
-	if err != nil {
-		return nil, err
+	pagesdata := make([][]byte, len(data.Pages))
+
+	for _, page := range data.Pages {
+		pagedata, err := GetPage(page.TemplateId, page.Page)
+
+		if err != nil {
+			return nil, err
+		}
+
+		replaceAll(&pagedata, r.Keys)
+		pagesdata[page.Page-1] = pagedata
+		log.Printf("Finished replacing keys of %s page %d\n", r.Id, page.Page)
+
 	}
-	defer reader.Close()
-	svgblob, err := io.ReadAll(reader)
-	if err != nil {
-		return nil, err
-	}
-	replaceAll(&svgblob, r.Keys)
 	log.Printf("Finished replacing keys of %s template\n", r.Id)
-	return svgblob, nil
+	return pagesdata, nil
 }
 
 func replaceAll(svgblob *[]byte, keys map[string]string) {
@@ -51,12 +63,7 @@ func replaceAll(svgblob *[]byte, keys map[string]string) {
 	}))
 }
 
-func verifyTemplate(id string, keys []string) (bool, error) {
-	data, err := database.GetSpecificSVG(id)
-	if err != nil {
-		return false, err
-	}
-
+func verifyTemplate(data svg.TemplateData, keys []string) (bool, error) {
 	for _, key := range data.AllKeys() {
 		if !slices.Contains(keys, key) {
 			return false, nil