init template

parser/name.go

@@ -0,0 +1,43 @@
+package parser
+
+import (
+	"context"
+	"path"
+	"strings"
+
+	"gitoa.ru/go-4devs/mime"
+	"gitoa.ru/go-4devs/templating/render"
+)
+
+const (
+	nameWithExt    = 2
+	nameWithEngine = 3
+	countOption    = 2
+)
+
+// Name parse name by <tpl name>.<format>.<engine> or <tpl name>.<format>.
+func Name(_ context.Context, name string, opts ...render.Option) (render.Reference, error) {
+	options := make([]render.Option, 0, countOption)
+	tplName := strings.ToLower(name)
+
+	base := path.Base(tplName)
+	el := strings.SplitN(base, ".", nameWithEngine)
+
+	var ext mime.Ext
+
+	switch len(el) {
+	case nameWithEngine:
+		ext = mime.ExtFromString(el[1])
+		options = append(options, render.WithEngine(el[2]))
+		tplName = strings.TrimRight(tplName, "."+el[1]+"."+el[2])
+	case nameWithExt:
+		ext = mime.ExtFromString(el[1])
+		tplName = strings.TrimRight(tplName, "."+el[1])
+	}
+
+	if !ext.Is(mime.ExtUnrecognized) {
+		options = append(options, render.WithFormat(ext))
+	}
+
+	return render.NewReference(tplName, append(options, opts...)...), nil
+}