1 files changed, 42 insertions, 0 deletions
diff --git a/resources/page/page_data.go b/resources/page/page_data.go
new file mode 100644
index 000000000..3345a44da
--- /dev/null
+++ b/resources/page/page_data.go
@@ -0,0 +1,42 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package page contains the core interfaces and types for the Page resource,
+// a core component in Hugo.
+package page
+
+import (
+	"fmt"
+)
+
+// Data represents the .Data element in a Page in Hugo. We make this
+// a type so we can do lazy loading of .Data.Pages
+type Data map[string]interface{}
+
+// Pages returns the pages stored with key "pages". If this is a func,
+// it will be invoked.
+func (d Data) Pages() Pages {
+	v, found := d["pages"]
+	if !found {
+		return nil
+	}
+
+	switch vv := v.(type) {
+	case Pages:
+		return vv
+	case func() Pages:
+		return vv()
+	default:
+		panic(fmt.Sprintf("%T is not Pages", v))
+	}
+}