1 files changed, 120 insertions, 0 deletions
diff --git a/output/outputFormat.go b/output/outputFormat.go
new file mode 100644
index 000000000..8c99aa139
--- /dev/null
+++ b/output/outputFormat.go
@@ -0,0 +1,120 @@
+// Copyright 2017-present 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 output
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/hugo/media"
+)
+
+var (
+	// An ordered list of built-in output formats
+	// See https://www.ampproject.org/learn/overview/
+	AMPType = Format{
+		Name:      "AMP",
+		MediaType: media.HTMLType,
+		BaseName:  "index",
+		Path:      "amp",
+	}
+
+	CSSType = Format{
+		Name:      "CSS",
+		MediaType: media.CSSType,
+		BaseName:  "styles",
+	}
+
+	HTMLType = Format{
+		Name:      "HTML",
+		MediaType: media.HTMLType,
+		BaseName:  "index",
+	}
+
+	JSONType = Format{
+		Name:        "JSON",
+		MediaType:   media.JSONType,
+		BaseName:    "index",
+		IsPlainText: true,
+	}
+
+	RSSType = Format{
+		Name:      "RSS",
+		MediaType: media.RSSType,
+		BaseName:  "index",
+		NoUgly:    true,
+	}
+)
+
+var builtInTypes = map[string]Format{
+	strings.ToLower(AMPType.Name):  AMPType,
+	strings.ToLower(CSSType.Name):  CSSType,
+	strings.ToLower(HTMLType.Name): HTMLType,
+	strings.ToLower(JSONType.Name): JSONType,
+	strings.ToLower(RSSType.Name):  RSSType,
+}
+
+type Formats []Format
+
+// Format represents an output represenation, usually to a file on disk.
+type Format struct {
+	// The Name is used as an identifier. Internal output formats (i.e. HTML and RSS)
+	// can be overridden by providing a new definition for those types.
+	Name string
+
+	MediaType media.Type
+
+	// Must be set to a value when there are two or more conflicting mediatype for the same resource.
+	Path string
+
+	// The base output file name used when not using "ugly URLs", defaults to "index".
+	BaseName string
+
+	// The protocol to use, i.e. "webcal://". Defaults to the protocol of the baseURL.
+	Protocol string
+
+	// IsPlainText decides whether to use text/template or html/template
+	// as template parser.
+	IsPlainText bool
+
+	// Enable to ignore the global uglyURLs setting.
+	NoUgly bool
+}
+
+func GetType(key string) (Format, bool) {
+	found, ok := builtInTypes[key]
+	if !ok {
+		found, ok = builtInTypes[strings.ToLower(key)]
+	}
+	return found, ok
+}
+
+// TODO(bep) outputs rewamp on global config?
+func GetTypes(keys ...string) (Formats, error) {
+	var types []Format
+
+	for _, key := range keys {
+		tpe, ok := GetType(key)
+		if !ok {
+			return types, fmt.Errorf("OutputFormat with key %q not found", key)
+		}
+		types = append(types, tpe)
+	}
+
+	return types, nil
+}
+
+func (t Format) BaseFilename() string {
+	return t.BaseName + "." + t.MediaType.Suffix
+}