mirror of
https://github.com/gohugoio/hugo.git
synced 2024-07-02 15:20:28 +00:00
117 lines
3 KiB
Go
117 lines
3 KiB
Go
// Copyright 2020 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 encoding provides template functions for encoding content.
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package encoding
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import (
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"encoding/base64"
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"encoding/json"
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"errors"
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"html/template"
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bp "github.com/gohugoio/hugo/bufferpool"
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"github.com/gohugoio/hugo/common/maps"
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"github.com/mitchellh/mapstructure"
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"github.com/spf13/cast"
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)
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// New returns a new instance of the encoding-namespaced template functions.
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func New() *Namespace {
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return &Namespace{}
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}
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// Namespace provides template functions for the "encoding" namespace.
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type Namespace struct{}
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// Base64Decode returns the base64 decoding of the given content.
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func (ns *Namespace) Base64Decode(content any) (string, error) {
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conv, err := cast.ToStringE(content)
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if err != nil {
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return "", err
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}
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dec, err := base64.StdEncoding.DecodeString(conv)
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return string(dec), err
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}
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// Base64Encode returns the base64 encoding of the given content.
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func (ns *Namespace) Base64Encode(content any) (string, error) {
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conv, err := cast.ToStringE(content)
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if err != nil {
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return "", err
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}
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return base64.StdEncoding.EncodeToString([]byte(conv)), nil
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}
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// Jsonify encodes a given object to JSON. To pretty print the JSON, pass a map
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// or dictionary of options as the first value in args. Supported options are
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// "prefix" and "indent". Each JSON element in the output will begin on a new
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// line beginning with prefix followed by one or more copies of indent according
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// to the indentation nesting.
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func (ns *Namespace) Jsonify(args ...any) (template.HTML, error) {
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var (
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b []byte
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err error
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obj any
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opts jsonifyOpts
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)
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switch len(args) {
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case 0:
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return "", nil
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case 1:
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obj = args[0]
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case 2:
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var m map[string]any
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m, err = maps.ToStringMapE(args[0])
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if err != nil {
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break
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}
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if err = mapstructure.WeakDecode(m, &opts); err != nil {
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break
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}
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obj = args[1]
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default:
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err = errors.New("too many arguments to jsonify")
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}
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if err != nil {
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return "", err
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}
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buff := bp.GetBuffer()
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defer bp.PutBuffer(buff)
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e := json.NewEncoder(buff)
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e.SetEscapeHTML(!opts.NoHTMLEscape)
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e.SetIndent(opts.Prefix, opts.Indent)
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if err = e.Encode(obj); err != nil {
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return "", err
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}
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b = buff.Bytes()
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// See https://github.com/golang/go/issues/37083
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// Hugo changed from MarshalIndent/Marshal. To make the output
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// the same, we need to trim the trailing newline.
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b = b[:len(b)-1]
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return template.HTML(b), nil
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}
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type jsonifyOpts struct {
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Prefix string
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Indent string
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NoHTMLEscape bool
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}
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