{{- $dir := .Get "dir" | default "" -}}
{{- $imagesParam := .Get "images" | default "" -}}
{{- $class := .Get "class" | default "gallery" -}}

{{- if eq $dir "" -}}
  <p><strong>gallery shortcode:</strong> dir= fehlt</p>
{{- else -}}

  {{- $base := printf "img/%s" $dir -}}
  {{- $images := slice -}}

  {{- if ne $imagesParam "" -}}
    {{- range (split $imagesParam ",") -}}
      {{- $img := trim . " " -}}
      {{- if ne $img "" -}}
        {{- $images = $images | append $img -}}
      {{- end -}}
    {{- end -}}
  {{- else -}}
    {{/* Auto: alle Dateien aus static/img/<dir> (über readDir) */}}
    {{- $path := printf "static/%s" $base -}}
    {{- range (readDir $path) -}}
      {{- if not .IsDir -}}
        {{- $name := .Name -}}
        {{- $lower := lower $name -}}
        {{- if or (hasSuffix $lower ".jpg") (hasSuffix $lower ".jpeg") (hasSuffix $lower ".png") (hasSuffix $lower ".webp") -}}
          {{- $images = $images | append $name -}}
        {{- end -}}
      {{- end -}}
    {{- end -}}
  {{- end -}}

  {{- if lt (len $images) 1 -}}
    <p><em>Keine Bilder gefunden in /static/{{ $base }}/</em></p>
  {{- else -}}
    <div class="{{ $class }}">
      {{- range $images -}}
        {{- $src := printf "/%s/%s" $base . -}}
        <a href="{{ $src }}">
          <img src="{{ $src }}" alt="" loading="lazy">
        </a>
      {{- end -}}
    </div>
  {{- end -}}

{{- end -}}