feat(theme): convert assets type to slice

src/tpl/defaultTheme/defaultTheme.go

@@ -9,15 +9,15 @@ import (
 //go:embed frontend/index.html
 var defaultTplStr string
 
-//go:embed frontend/favicon.ico
-var defaultFavicon []byte
-
 //go:embed frontend/index.css
 var defaultCss []byte
 
 //go:embed frontend/index.js
 var defaultJs []byte
 
+//go:embed frontend/favicon.ico
+var defaultFavicon []byte
+
 var DefaultTheme theme.MemTheme
 
 func init() {
@@ -29,8 +29,8 @@ func init() {
 	}
 
 	DefaultTheme.Assets = theme.Assets{
-		"favicon.ico": {"image/x-icon", bytes.NewReader(defaultFavicon)},
-		"index.css":   {"text/css; charset=utf-8", bytes.NewReader(defaultCss)},
-		"index.js":    {"application/javascript; charset=utf-8", bytes.NewReader(defaultJs)},
+		{"index.css", "text/css; charset=utf-8", bytes.NewReader(defaultCss)},
+		{"index.js", "application/javascript; charset=utf-8", bytes.NewReader(defaultJs)},
+		{"favicon.ico", "image/x-icon", bytes.NewReader(defaultFavicon)},
 	}
 }

src/tpl/theme/asset.go

@@ -7,23 +7,25 @@ import (
 )
 
 type Asset struct {
+	Path        string
 	ContentType string
 	ReadSeeker  io.ReadSeeker
 }
 
-type Assets map[string]Asset
+type Assets []Asset
 
-func (assets Assets) Set(path string, content []byte) error {
+func (assets Assets) Append(path string, content []byte) (Assets, error) {
 	rd := bytes.NewReader(content)
 	ctype, err := util.GetContentType(path, rd)
 	if err != nil {
-		return err
+		return assets, err
 	}
 
-	asset := Asset{
+	assets = append(assets, Asset{
+		Path:        path,
 		ContentType: ctype,
 		ReadSeeker:  rd,
-	}
-	assets[path] = asset
-	return nil
+	})
+
+	return assets, nil
 }

src/tpl/theme/memTheme.go

@@ -17,11 +17,6 @@ type MemTheme struct {
 var initTime = time.Now()
 
 func LoadMemTheme(themePath string) (theme MemTheme, err error) {
-	var currentTheme = MemTheme{
-		Template: nil,
-		Assets:   make(Assets, 3),
-	}
-
 	// assume to be a zip file
 	var zipRd *zip.ReadCloser
 	zipRd, err = zip.OpenReader(themePath)
@@ -30,6 +25,11 @@ func LoadMemTheme(themePath string) (theme MemTheme, err error) {
 	}
 	defer zipRd.Close()
 
+	currentTheme := MemTheme{
+		Template: nil,
+		Assets:   make(Assets, 0, len(zipRd.File)-1), // exclude template file
+	}
+
 	for _, f := range zipRd.File {
 		var rd io.ReadCloser
 		rd, err = f.Open()
@@ -48,7 +48,7 @@ func LoadMemTheme(themePath string) (theme MemTheme, err error) {
 				return
 			}
 		} else {
-			currentTheme.Assets.Set(f.Name, raw)
+			currentTheme.Assets, _ = currentTheme.Assets.Append(f.Name, raw)
 		}
 	}
 
@@ -66,12 +66,16 @@ func (theme MemTheme) RenderPage(w io.Writer, data interface{}) error {
 }
 
 func (theme MemTheme) RenderAsset(w http.ResponseWriter, r *http.Request, assetPath string) {
-	asset, ok := theme.Assets[assetPath]
-	if !ok {
-		w.WriteHeader(http.StatusNotFound)
+	assets := theme.Assets
+	for i := range assets {
+		if assets[i].Path != assetPath {
+			continue
+		}
+		w.Header().Set("Content-Type", assets[i].ContentType)
+		http.ServeContent(w, r, assetPath, initTime, assets[i].ReadSeeker)
 		return
 	}
 
-	w.Header().Set("Content-Type", asset.ContentType)
-	http.ServeContent(w, r, assetPath, initTime, asset.ReadSeeker)
+	w.WriteHeader(http.StatusNotFound)
+	return
 }