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utils.go
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/
utils.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 toc
import (
"html/template"
"github.com/go-enjin/be/pkg/feature"
"github.com/go-enjin/be/pkg/log"
)
func parseNameTagTitle(dt map[string]interface{}) (name, tag, title string, valid bool) {
var ok bool
if name, ok = dt["type"].(string); ok {
if tag, ok = dt["tag"].(string); ok {
if c, ok := dt["content"].(map[string]interface{}); ok {
if hi, ok := c["header"]; ok {
// TODO: find a better way of determining a block's "title" heading
switch ht := hi.(type) {
case []interface{}:
for _, hti := range ht {
if hts, ok := hti.(string); ok {
if title != "" {
title += " "
}
title += hts
}
}
case string:
if title != "" {
title += " "
}
title += ht
}
}
}
valid = true
}
}
return
}
func walkTableOfContents(re feature.EnjinRenderer, count, level int, data interface{}) (upCount, upLevel int, list []*tocItem) {
list = make([]*tocItem, 0)
switch dt := data.(type) {
case []interface{}:
for _, dti := range dt {
var children []*tocItem
if count, level, children = walkTableOfContents(re, count, level, dti); children != nil {
list = append(list, children...)
}
}
case map[string]interface{}:
// look for tag, title, update level and append any children
if typeName, tag, title, ok := parseNameTagTitle(dt); ok {
switch typeName {
case "carousel", "pair":
// nop
case "sidebar":
if title != "" {
list = append(list, &tocItem{
Tag: tag,
Title: template.HTML(title),
Level: level,
})
log.TraceF("sidebar found: %v, %v, %v, %v", count, level, tag, title)
}
if c, ok := dt["content"].(map[string]interface{}); ok {
if b, ok := c["blocks"].([]interface{}); ok {
var children []*tocItem
if count, level, children = walkTableOfContents(re, count, level, b); len(children) > 0 {
log.TraceF("sidebar children: %v, %v, %v, %v", count, level, tag, children)
list = append(list, children...)
}
}
}
case "header":
var hr, hl int
level, hr, hl = re.ParseBlockHeadingLevel(count, level, dt)
log.TraceF("header found: count=%v, level=%v, tag=%v, title=%v (hr=%v,hl=%v)", count, level, tag, title, hr, hl)
if level > 1 { // skip h1
list = append(list, &tocItem{
Tag: tag,
Title: template.HTML(title),
Level: level,
})
}
if hr == -255 /*&& hl == -255*/ {
level += 1
}
count += 1
default:
if title != "" {
list = append(list, &tocItem{
Tag: tag,
Title: template.HTML(title),
Level: level,
})
log.TraceF("default found: %v, %v, %v, %v", count, level, tag, title)
}
}
} else {
log.TraceF("parse name tag title failed: %+v", dt)
}
}
upCount, upLevel = count, level
return
}
func sortTableOfContents(toc []*tocItem) (items []*tocItem) {
level := 1
var parent *tocItem
for _, item := range toc {
if item.Level <= level {
level = item.Level
items = append(items, item)
parent = item
} else {
if parent != nil {
parent.Children = append(parent.Children, item)
} else {
level = item.Level
items = append(items, item)
parent = item
}
}
}
return
}