move packages to src

src/assets/assets.go

@@ -0,0 +1,45 @@
+package assets
+
+import (
+	"embed"
+	"html/template"
+	"io"
+	"io/ioutil"
+	"io/fs"
+	"os"
+)
+
+type assetsfs struct {
+	embedded  *embed.FS
+	templates map[string]*template.Template
+}
+
+var FS assetsfs
+
+func (afs assetsfs) Open(name string) (fs.File, error) {
+	if afs.embedded != nil {
+		return afs.embedded.Open(name)
+	}
+	return os.DirFS("assets").Open(name)
+}
+
+func Render(path string, writer io.Writer, data interface{}) {
+	var tmpl *template.Template
+	tmpl, found := FS.templates[path]
+	if !found {
+		tmpl = template.Must(template.New(path).Delims("{%", "%}").Funcs(template.FuncMap{
+			"inline": func(svg string) template.HTML {
+				svgfile, _ := FS.Open("graphicarts/" + svg)
+				content, _ := ioutil.ReadAll(svgfile)
+				svgfile.Close()
+				return template.HTML(content)
+			},
+		}).ParseFS(FS, path))
+		FS.templates[path] = tmpl
+	}
+	tmpl.Execute(writer, data)
+}
+
+func init() {
+	FS.templates = make(map[string]*template.Template)
+}