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package glightbox
import (
"bytes"
"fmt"
"math/rand"
"regexp"
"strings"
"time"
"github.com/SayaAndy/saya-today-web/internal/tailwind"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer"
"github.com/yuin/goldmark/renderer/html"
"github.com/yuin/goldmark/util"
)
type GLightboxHTMLRenderer struct {
html.Config
md goldmark.Markdown
anchorMatchRe *regexp.Regexp
}
func NewGLightboxHTMLRenderer(opts ...html.Option) renderer.NodeRenderer {
r := &GLightboxHTMLRenderer{
Config: html.NewConfig(),
md: goldmark.New(
goldmark.WithParserOptions(
parser.WithAutoHeadingID(),
parser.WithAttribute(),
),
goldmark.WithRenderer(
renderer.NewRenderer(
renderer.WithNodeRenderers(
util.Prioritized(tailwind.NewCustomLinkRenderer(
html.WithUnsafe(), html.WithHardWraps(), html.WithXHTML(),
), 50),
util.Prioritized(html.NewRenderer(
html.WithUnsafe(), html.WithHardWraps(), html.WithXHTML(),
), 100),
),
),
),
),
}
for _, opt := range opts {
opt.SetHTMLOption(&r.Config)
}
r.anchorMatchRe = regexp.MustCompile(`(?s)<\s*a(\s+[^<]*)(href\s*=\s*["'].*?["'])\s*([^<]*)>(.*?)<\s*\/\s*a\s*>`)
return r
}
func (r *GLightboxHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
reg.Register(KindGLightboxBlock, r.renderGLightbox)
}
func (r *GLightboxHTMLRenderer) renderGLightbox(w util.BufWriter, source []byte, n ast.Node, entering bool) (ast.WalkStatus, error) {
if entering {
gallery := n.(*GLightboxBlock)
if len(gallery.Images) == 0 {
return ast.WalkContinue, nil
}
galleryID := generateDivId(8)
var elements []string
for i, img := range gallery.Images {
fullImageUrl := gallery.Namespace + img.URL
imageUrlSegments := strings.Split(fullImageUrl, ".")
imageUrlWithoutExt := strings.Join(imageUrlSegments[:len(imageUrlSegments)-1], ".")
imageUrlParts := strings.Split(imageUrlWithoutExt, "/")
imageNameParts := strings.Split(imageUrlParts[len(imageUrlParts)-1], "-")
var captionBuf bytes.Buffer
captionHTML := img.Caption
if err := r.md.Convert(img.Caption, &captionBuf); err == nil {
captionHTML = captionBuf.Bytes()
captionHTML = bytes.TrimPrefix(captionHTML, []byte("<p>"))
captionHTML = bytes.TrimSuffix(captionHTML, []byte("</p>\n"))
captionHTML = bytes.TrimSuffix(captionHTML, []byte("</p>"))
}
dayDate, _ := time.Parse("20060102 150405", imageNameParts[len(imageNameParts)-2]+" "+imageNameParts[len(imageNameParts)-1])
dayDate = dayDate.In(gallery.Location)
glightboxDescId := ""
if len(captionHTML) != 0 {
glightboxDescId = fmt.Sprintf("glightbox-desc-%s-%d", galleryID, i)
}
dataDescriptionAttribute := ""
if glightboxDescId != "" {
dataDescriptionAttribute = fmt.Sprintf("data-description=\".%s\"", glightboxDescId)
}
tagClassList := make([]string, 0, len(img.Tags))
for _, tag := range img.Tags {
switch tag {
case "2x":
tagClassList = append(tagClassList, "grid-item-2x")
}
}
if len(img.Caption) > 0 {
tagClassList = append(tagClassList, "grid-tooltip")
}
anchorlessCaptionHTML := r.anchorMatchRe.ReplaceAll(captionHTML, []byte("<span class=\"linklike\" $1 $3>$4</span>"))
elements = append(elements, fmt.Sprintf(`
<a href="https://f003.backblazeb2.com/file/sayana-photos/full/%s" class="glightbox grid-item %s grid-item-%s p-1"
data-gallery="gallery" data-title="%s" %s>
<picture>
<source media="(width < 800px)" srcset="https://f003.backblazeb2.com/file/sayana-photos/webp-320p/%s.webp" />
<source media="(width < 2400px)" srcset="https://f003.backblazeb2.com/file/sayana-photos/webp-560p/%s.webp" />
<source media="(width < 3200px)" srcset="https://f003.backblazeb2.com/file/sayana-photos/webp-800p/%s.webp" />
<source media="(width < 4000px)" srcset="https://f003.backblazeb2.com/file/sayana-photos/webp-1200p/%s.webp" />
<source media="(width >= 4000px)" srcset="https://f003.backblazeb2.com/file/sayana-photos/webp-1600p/%s.webp" />
<img src="https://f003.backblazeb2.com/file/sayana-photos/webp-560p/%s.webp" />
</picture>
<span class="grid-tooltip-text"><p>%s</p></span>
<span class="grid-item-index">%d</span>
</a>`, fullImageUrl, strings.Join(tagClassList, " "), galleryID, dayDate.Format("2006-01-02 15:04:05 -07:00"), dataDescriptionAttribute, imageUrlWithoutExt, imageUrlWithoutExt, imageUrlWithoutExt, imageUrlWithoutExt, imageUrlWithoutExt, imageUrlWithoutExt, anchorlessCaptionHTML, i+1))
if glightboxDescId != "" {
elements = append(elements, fmt.Sprintf(`
<div class="glightbox-desc rounded-4 %s">
<p>%s</p>
</div>`, glightboxDescId, captionHTML))
}
}
w.WriteString(strings.ReplaceAll(`
<div class="items-center flex flex-col">
<hr class="border-t-3 border-dotted border-main-hard mt-1 mb-2 w-[80%%] ml-auto mr-auto">
<div class="grid masonry-grid-{id}">
<div class="grid-sizer grid-sizer-{id}"></div>
`+strings.Join(elements, "\n")+`
</div>
<hr class="border-t-3 border-dotted border-main-hard mt-1 mb-2 w-[80%%] ml-auto mr-auto">
</div>
<script>
var pckry_{id} = new Packery('.masonry-grid-{id}', {
itemSelector: '.grid-item-{id}',
columnWidth: '.grid-sizer-{id}',
percentPosition: false
});
var imgLoad_{id}_timer;
var imgLoad_{id} = imagesLoaded('.masonry-grid-{id}');
function initMasonryLayout_{id}(tm) {
clearTimeout(imgLoad_{id}_timer);
imgLoad_{id}_timer = setTimeout(() => pckry_{id}.layout(), 100);
}
imgLoad_{id}.on('progress', initMasonryLayout_{id});
window.addEventListener('resize', initMasonryLayout_{id});
document.addEventListener('popout', (e) => {
window.removeEventListener('resize', initMasonryLayout_{id});
imgLoad_{id}.off('progress', initMasonryLayout_{id});
initMasonryLayout_{id} = null;
imgLoad_{id} = null;
}, {once: true});
</script>
`, "{id}", galleryID))
}
return ast.WalkContinue, nil
}
func generateDivId(length int) string {
const charset = "abcdefghijklmnopqrstuvwxyz"
seededRand := rand.New(rand.NewSource(time.Now().UnixNano())) // Seed with current time
b := make([]byte, length)
for i := range b {
b[i] = charset[seededRand.Intn(len(charset))]
}
return string(b)
}
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