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tpl: Extend Jsonify to support options map

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Add support for prefix and indent options used by json.MarshalIndent
from the Go stdlib.
This commit is contained in:
Cameron Moore 2020-03-23 21:03:52 -05:00 committed by Bjørn Erik Pedersen
parent 1bc93021e3
commit 8568928aa8
3 changed files with 23 additions and 13 deletions
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15
tpl/encoding/encoding.go
View file

@ -1,4 +1,4 @@
// Copyright 2017 The Hugo Authors. All rights reserved.
// Copyright 2020 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.
@ -52,8 +52,11 @@ func (ns *Namespace) Base64Encode(content interface{}) (string, error) {
return base64.StdEncoding.EncodeToString([]byte(conv)), nil
}
// Jsonify encodes a given object to JSON. To pretty print the JSON, pass an
// optional first argument of the indent string, such as " ".
// Jsonify encodes a given object to JSON. To pretty print the JSON, pass a map
// or dictionary of options as the first argument. Supported options are
// "prefix" and "indent". Each JSON element in the output will begin on a new
// line beginning with prefix followed by one or more copies of indent according
// to the indentation nesting.
func (ns *Namespace) Jsonify(args ...interface{}) (template.HTML, error) {
var (
b []byte
@ -66,14 +69,14 @@ func (ns *Namespace) Jsonify(args ...interface{}) (template.HTML, error) {
case 1:
b, err = json.Marshal(args[0])
case 2:
var indent string
var opts map[string]string
indent, err = cast.ToStringE(args[0])
opts, err = cast.ToStringMapStringE(args[0])
if err != nil {
break
}
b, err = json.MarshalIndent(args[1], "", indent)
b, err = json.MarshalIndent(args[1], opts["prefix"], opts["indent"])
default:
err = errors.New("too many arguments to jsonify")
}

17
tpl/encoding/encoding_test.go
View file

@ -1,4 +1,4 @@
// Copyright 2017 The Hugo Authors. All rights reserved.
// Copyright 2020 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.
@ -83,20 +83,27 @@ func TestJsonify(t *testing.T) {
ns := New()
for _, test := range []struct {
indent []interface{}
opts interface{}
v interface{}
expect interface{}
}{
{nil, []string{"a", "b"}, template.HTML(`["a","b"]`)},
{[]interface{}{" "}, []string{"a", "b"}, template.HTML("[\n \"a\",\n \"b\"\n]")},
{map[string]string{"indent": "<i>"}, []string{"a", "b"}, template.HTML("[\n<i>\"a\",\n<i>\"b\"\n]")},
{map[string]string{"prefix": "<p>"}, []string{"a", "b"}, template.HTML("[\n<p>\"a\",\n<p>\"b\"\n<p>]")},
{map[string]string{"prefix": "<p>", "indent": "<i>"}, []string{"a", "b"}, template.HTML("[\n<p><i>\"a\",\n<p><i>\"b\"\n<p>]")},
{nil, tstNoStringer{}, template.HTML("{}")},
{nil, nil, template.HTML("null")},
// errors
{nil, math.NaN(), false},
{[]interface{}{tstNoStringer{}}, []string{"a", "b"}, false},
{tstNoStringer{}, []string{"a", "b"}, false},
} {
args := []interface{}{}
args := append(test.indent, test.v)
if test.opts != nil {
args = append(args, test.opts)
}
args = append(args, test.v)
result, err := ns.Jsonify(args...)

4
tpl/encoding/init.go
View file

@ -1,4 +1,4 @@
// Copyright 2017 The Hugo Authors. All rights reserved.
// Copyright 2020 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.
@ -48,7 +48,7 @@ func init() {
[]string{"jsonify"},
[][2]string{
{`{{ (slice "A" "B" "C") | jsonify }}`, `["A","B","C"]`},
{`{{ (slice "A" "B" "C") | jsonify " "}}`, "[\n \"A\",\n \"B\",\n \"C\"\n]"},
{`{{ (slice "A" "B" "C") | jsonify (dict "indent" " ") }}`, "[\n \"A\",\n \"B\",\n \"C\"\n]"},
},
)