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// 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/
AMPFormat = Format{
Name: "AMP",
MediaType: media.HTMLType,
BaseName: "index",
Path: "amp",
Rel: "amphtml",
IsHTML: true,
}
CalendarFormat = Format{
Name: "Calendar",
MediaType: media.CalendarType,
IsPlainText: true,
Protocol: "webcal://",
BaseName: "index",
Rel: "alternate",
}
CSSFormat = Format{
Name: "CSS",
MediaType: media.CSSType,
BaseName: "styles",
Rel: "stylesheet",
}
HTMLFormat = Format{
Name: "HTML",
MediaType: media.HTMLType,
BaseName: "index",
Rel: "canonical",
IsHTML: true,
}
JSONFormat = Format{
Name: "JSON",
MediaType: media.JSONType,
BaseName: "index",
IsPlainText: true,
Rel: "alternate",
}
RSSFormat = Format{
Name: "RSS",
MediaType: media.RSSType,
BaseName: "index",
NoUgly: true,
Rel: "alternate",
}
)
var builtInTypes = map[string]Format{
strings.ToLower(AMPFormat.Name): AMPFormat,
strings.ToLower(CalendarFormat.Name): CalendarFormat,
strings.ToLower(CSSFormat.Name): CSSFormat,
strings.ToLower(HTMLFormat.Name): HTMLFormat,
strings.ToLower(JSONFormat.Name): JSONFormat,
strings.ToLower(RSSFormat.Name): RSSFormat,
}
type Formats []Format
func (formats Formats) GetByName(name string) (f Format, found bool) {
for _, ff := range formats {
if name == ff.Name {
f = ff
found = true
return
}
}
return
}
// Format represents an output representation, 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 value to use for rel links
//
// See https://www.w3schools.com/tags/att_link_rel.asp
//
// AMP has a special requirement in this department, see:
// https://www.ampproject.org/docs/guides/deploy/discovery
// I.e.:
// <link rel="amphtml" href="https://www.example.com/url/to/amp/document.html">
Rel 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
// IsHTML returns whether this format is int the HTML family. This includes
// HTML, AMP etc. This is used to decide when to create alias redirects etc.
IsHTML bool
// Enable to ignore the global uglyURLs setting.
NoUgly bool
}
func GetFormat(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 GetFormats(keys ...string) (Formats, error) {
var types []Format
for _, key := range keys {
tpe, ok := GetFormat(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
}
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