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package lightgallery
import (
"bytes"
"regexp"
"strings"
"time"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/text"
)
type LightGalleryParser struct{}
func NewLightGalleryParser() parser.BlockParser {
return &LightGalleryParser{}
}
func (p *LightGalleryParser) Trigger() []byte {
return []byte{'{'}
}
func (p *LightGalleryParser) Open(parent ast.Node, reader text.Reader, pc parser.Context) (ast.Node, parser.State) {
line, _ := reader.PeekLine()
if !bytes.HasPrefix(line, []byte("{Gallery")) {
return nil, parser.NoChildren
}
r := regexp.MustCompile(`^\{Gallery:([A-Za-z0-9\+\-/]+)\}$`)
trimmed := bytes.TrimSpace(line)
parts := r.FindSubmatch(trimmed)
if len(parts) < 2 {
return nil, parser.NoChildren
}
loc, err := time.LoadLocation(string(parts[1]))
if err != nil {
return nil, parser.NoChildren
}
return &LightGalleryBlock{Location: loc}, parser.NoChildren
}
func (p *LightGalleryParser) Continue(node ast.Node, reader text.Reader, pc parser.Context) parser.State {
line, segment := reader.PeekLine()
if len(line) == 0 || segment.Len() == 0 {
return parser.Close
}
trimmed := bytes.TrimSpace(line)
if bytes.Equal(trimmed, []byte("{Gallery}")) {
reader.AdvanceLine()
return parser.Close
}
gallery := node.(*LightGalleryBlock)
lineStr := string(trimmed)
parts := strings.SplitN(lineStr, "|", 2)
url := strings.TrimSpace(parts[0])
caption := ""
if len(parts) > 1 {
caption = strings.TrimSpace(parts[1])
}
gallery.Images = append(gallery.Images, LightGalleryImage{
URL: url,
Caption: caption,
})
return parser.Continue | parser.NoChildren
}
func (p *LightGalleryParser) Close(node ast.Node, reader text.Reader, pc parser.Context) {
}
func (p *LightGalleryParser) CanInterruptParagraph() bool {
return true
}
func (p *LightGalleryParser) CanAcceptIndentedLine() bool {
return false
}
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