mirror of
https://github.com/gohugoio/hugo.git
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ba1d0051b4
So we can use it and output.Format as map key etc. This commit also fixes the media.Type implementation so it does not need to mutate itself to handle different suffixes for the same MIME type, e.g. jpg vs. jpeg. This means that there are no Suffix or FullSuffix on media.Type anymore. Fixes #8317 Fixes #8324
111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
// Copyright 2018 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metadecoders
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import (
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"path/filepath"
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"strings"
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"github.com/gohugoio/hugo/media"
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)
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type Format string
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const (
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// These are the supported metdata formats in Hugo. Most of these are also
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// supported as /data formats.
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ORG Format = "org"
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JSON Format = "json"
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TOML Format = "toml"
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YAML Format = "yaml"
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CSV Format = "csv"
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)
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// FormatFromString turns formatStr, typically a file extension without any ".",
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// into a Format. It returns an empty string for unknown formats.
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func FormatFromString(formatStr string) Format {
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formatStr = strings.ToLower(formatStr)
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if strings.Contains(formatStr, ".") {
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// Assume a filename
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formatStr = strings.TrimPrefix(filepath.Ext(formatStr), ".")
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}
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switch formatStr {
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case "yaml", "yml":
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return YAML
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case "json":
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return JSON
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case "toml":
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return TOML
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case "org":
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return ORG
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case "csv":
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return CSV
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}
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return ""
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}
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// FormatFromMediaType gets the Format given a MIME type, empty string
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// if unknown.
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func FormatFromMediaType(m media.Type) Format {
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for _, suffix := range m.Suffixes() {
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if f := FormatFromString(suffix); f != "" {
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return f
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}
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}
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return ""
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}
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// FormatFromContentString tries to detect the format (JSON, YAML or TOML)
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// in the given string.
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// It return an empty string if no format could be detected.
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func (d Decoder) FormatFromContentString(data string) Format {
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csvIdx := strings.IndexRune(data, d.Delimiter)
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jsonIdx := strings.Index(data, "{")
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yamlIdx := strings.Index(data, ":")
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tomlIdx := strings.Index(data, "=")
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if isLowerIndexThan(csvIdx, jsonIdx, yamlIdx, tomlIdx) {
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return CSV
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}
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if isLowerIndexThan(jsonIdx, yamlIdx, tomlIdx) {
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return JSON
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}
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if isLowerIndexThan(yamlIdx, tomlIdx) {
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return YAML
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}
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if tomlIdx != -1 {
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return TOML
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}
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return ""
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}
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func isLowerIndexThan(first int, others ...int) bool {
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if first == -1 {
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return false
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}
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for _, other := range others {
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if other != -1 && other < first {
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return false
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}
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}
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return true
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}
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