layout: implement nested locales

layout/layout_test.go

@@ -132,4 +132,17 @@ func TestLayout(t *testing.T) {
 		Description: "Some description",
 		PreviewURL:  "https://preview.picture",
 	}))
+
+	assert.Equal(t,
+		"This is an article.",
+		lt.TextLocale("en", "article_message"),
+	)
+	assert.Equal(t,
+		lt.TextLocale("en", "nested.example", "an example"),
+		"This is an example.",
+	)
+	assert.Equal(t,
+		lt.TextLocale("en", "nested.another.example", "another example"),
+		"This is another example.",
+	)
 }

layout/locales/en.yml

@@ -1 +1,8 @@
-article_message: This is an article.
+article_message: This is an article.
+
+nested:
+  example: |-
+    This is {{ . }}.
+  another:
+    example: |-
+      This is {{ . }}.

layout/parser.go

@@ -246,18 +246,23 @@ func (lt *Layout) parseLocales(dir string) error {
 			return err
 		}
 
-		var texts map[string]string
+		var texts map[string]interface{}
 		if err := yaml.Unmarshal(data, &texts); err != nil {
 			return err
 		}
 
+		v := viper.New()
+		if err := v.MergeConfigMap(texts); err != nil {
+			return err
+		}
+
 		name := fi.Name()
 		name = strings.TrimSuffix(name, filepath.Ext(name))
 
 		tmpl := template.New(name).Funcs(lt.funcs)
-		for key, text := range texts {
-			_, err = tmpl.New(key).Parse(strings.Trim(text, "\r\n"))
-			if err != nil {
+		for _, key := range v.AllKeys() {
+			text := strings.Trim(v.GetString(key), "\r\n")
+			if _, err := tmpl.New(key).Parse(text); err != nil {
 				return err
 			}
 		}