mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
130 lines
2.9 KiB
Go
130 lines
2.9 KiB
Go
// Copyright 2018 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 metadecoders
|
|
|
|
import (
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/gohugoio/hugo/media"
|
|
|
|
"github.com/gohugoio/hugo/parser/pageparser"
|
|
)
|
|
|
|
type Format string
|
|
|
|
const (
|
|
// These are the supported metdata formats in Hugo. Most of these are also
|
|
// supported as /data formats.
|
|
ORG Format = "org"
|
|
JSON Format = "json"
|
|
TOML Format = "toml"
|
|
YAML Format = "yaml"
|
|
CSV Format = "csv"
|
|
)
|
|
|
|
// FormatFromString turns formatStr, typically a file extension without any ".",
|
|
// into a Format. It returns an empty string for unknown formats.
|
|
func FormatFromString(formatStr string) Format {
|
|
formatStr = strings.ToLower(formatStr)
|
|
if strings.Contains(formatStr, ".") {
|
|
// Assume a filename
|
|
formatStr = strings.TrimPrefix(filepath.Ext(formatStr), ".")
|
|
|
|
}
|
|
switch formatStr {
|
|
case "yaml", "yml":
|
|
return YAML
|
|
case "json":
|
|
return JSON
|
|
case "toml":
|
|
return TOML
|
|
case "org":
|
|
return ORG
|
|
case "csv":
|
|
return CSV
|
|
}
|
|
|
|
return ""
|
|
|
|
}
|
|
|
|
// FormatFromMediaType gets the Format given a MIME type, empty string
|
|
// if unknown.
|
|
func FormatFromMediaType(m media.Type) Format {
|
|
for _, suffix := range m.Suffixes {
|
|
if f := FormatFromString(suffix); f != "" {
|
|
return f
|
|
}
|
|
}
|
|
|
|
return ""
|
|
}
|
|
|
|
// FormatFromFrontMatterType will return empty if not supported.
|
|
func FormatFromFrontMatterType(typ pageparser.ItemType) Format {
|
|
switch typ {
|
|
case pageparser.TypeFrontMatterJSON:
|
|
return JSON
|
|
case pageparser.TypeFrontMatterORG:
|
|
return ORG
|
|
case pageparser.TypeFrontMatterTOML:
|
|
return TOML
|
|
case pageparser.TypeFrontMatterYAML:
|
|
return YAML
|
|
default:
|
|
return ""
|
|
}
|
|
}
|
|
|
|
// FormatFromContentString tries to detect the format (JSON, YAML or TOML)
|
|
// in the given string.
|
|
// It return an empty string if no format could be detected.
|
|
func (d Decoder) FormatFromContentString(data string) Format {
|
|
csvIdx := strings.IndexRune(data, d.Delimiter)
|
|
jsonIdx := strings.Index(data, "{")
|
|
yamlIdx := strings.Index(data, ":")
|
|
tomlIdx := strings.Index(data, "=")
|
|
|
|
if isLowerIndexThan(csvIdx, jsonIdx, yamlIdx, tomlIdx) {
|
|
return CSV
|
|
}
|
|
|
|
if isLowerIndexThan(jsonIdx, yamlIdx, tomlIdx) {
|
|
return JSON
|
|
}
|
|
|
|
if isLowerIndexThan(yamlIdx, tomlIdx) {
|
|
return YAML
|
|
}
|
|
|
|
if tomlIdx != -1 {
|
|
return TOML
|
|
}
|
|
|
|
return ""
|
|
}
|
|
|
|
func isLowerIndexThan(first int, others ...int) bool {
|
|
if first == -1 {
|
|
return false
|
|
}
|
|
for _, other := range others {
|
|
if other != -1 && other < first {
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|