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render_enjin_stringtags.go
121 lines (105 loc) · 3.36 KB
/
render_enjin_stringtags.go
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//go:build !exclude_pages_formats && !exclude_pages_format_njn
// Copyright (c) 2022 The Go-Enjin Authors
//
// 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 njn
import (
"fmt"
"strings"
"golang.org/x/net/html"
"github.com/go-corelibs/slices"
)
func (re *RenderEnjin) PrepareStringTags(text string) (data []interface{}, err error) {
if doc, e := html.Parse(strings.NewReader(text)); e != nil {
err = e
return
} else {
data = re.WalkStringTags(doc)
}
return
}
func (re *RenderEnjin) WalkStringTags(doc *html.Node) (prepared []interface{}) {
var traverse func(depth string, n *html.Node) (*html.Node, []interface{})
foundBody := false
traverse = func(depth string, n *html.Node) (*html.Node, []interface{}) {
var data []interface{}
for c := n.FirstChild; c != nil; c = c.NextSibling {
if !foundBody {
// log.DebugF("%v[skipping]: %+v - %+v", depth, c.Type, c.Data)
foundBody = c.Type == html.ElementNode && c.Data == "body"
if res, childData := traverse(depth+" ", c); res != nil {
if len(childData) > 0 {
data = append(data, childData...)
}
return res, data
} else if len(childData) > 0 {
data = append(data, childData...)
}
} else if c.Type == html.TextNode {
// log.DebugF("%v[storing]: %v", depth, c.Data)
parsed := re.Enjin.TranslateShortcodes(c.Data, re.ctx)
if last := len(data) - 1; last >= 0 {
if v, ok := data[last].(string); ok {
data[last] = v + parsed
} else {
data = append(data, parsed)
}
} else {
data = append(data, parsed)
}
} else if c.Type == html.ElementNode {
if slices.Present(c.Data, re.Njn.StringTags()...) {
// log.DebugF("%v[shortcode]: %v", depth, c.Data)
child := make(map[string]interface{})
child["Type"] = c.Data // tag name for element nodes
res, childData := traverse(depth+" ", c)
child["Text"] = childData
data = append(data, child)
if res != nil {
return res, data
}
} else {
// log.DebugF("%v[ignored]: %v", depth, c.Data)
res, childData := traverse(depth+" ", c)
childText := "<" + c.Data + ">"
for _, childDatum := range childData {
switch typedDatum := childDatum.(type) {
case string:
childText += typedDatum
default:
// TODO: parse content within StringTags for fields and other oddities
childText += fmt.Sprintf("(stringtags error: %T)", typedDatum)
}
}
childText += "</" + c.Data + ">"
if last := len(data) - 1; last >= 0 {
if v, ok := data[last].(string); ok {
data[last] = v + childText
} else {
data = append(data, childText)
}
} else {
data = append(data, childText)
}
if res != nil {
return res, data
}
}
}
}
return nil, data
}
_, prepared = traverse("", doc)
// log.DebugF("returning prepared: %+v", prepared)
return
}