hugo-theme-relearn/layouts/partials/shortcodes/link.html

{{- $page := .page }}
{{- if and (not $page) .context }}
  {{- $page = .context }}
  {{- warnf "%q: DEPRECATED parameter 'context' for shortcode 'link' found, use 'page' instead; see https://mcshelby.github.io/hugo-theme-relearn/basics/migration#5180" $page.File.Filename }}
{{- end }}
{{- $url := .url }}
{{- if strings.HasPrefix $url "HAHAHUGOSHORTCODE" }}
  {{- warnf "%q: WARNING you must call the ref / relref shortcode with '%% %%' instead of '< >' to work correctly for the anchor target attribute" $page.File.Filename }}
{{- end }}
{{- $attributes := dict }}
{{- $title := .title | default "" }}
{{- $title = trim $title " " }}
{{- $attributes = $attributes | merge (dict "title" $title) }}
{{- $content := .content }}
{{- $target := .target | default "" }}
{{- $u := urls.Parse $url }}
{{- $href := $u.String }}
{{- $path := $u.Path }}
{{- if $u.IsAbs }}
  {{- $attributes = merge $attributes (dict "rel" "external") }}
  {{- $target = "_blank" }}
  {{- if isset $page.Site.Params "externallinktarget" }}
    {{- $target = $page.Site.Params.externalLinkTarget }}
  {{- end }}
  {{- $attributes = $attributes | merge (dict "target" $target) }}
{{- else }}
  {{- $linkPage := "" }}
  {{- if $path }}
    {{- with or
      ($page.Page.GetPage $path)
      ($page.Page.GetPage (strings.TrimRight "/" $path))
      ($page.Page.Resources.Get $path)
      (and (ne $page.Page.BundleType "leaf") ($page.Page.CurrentSection.Resources.Get $path))
      (resources.Get $path)
    }}
      {{- $linkPage = . }}
    {{- else }}
      {{- /* is it a link into another translation? */}}
      {{- if strings.HasPrefix $path "/" }}
        {{- range $page.AllTranslations }}
          {{- $lang := .Language.Lang }}
          {{- $prefix := printf "/%s" $lang }}
          {{- $suffix := strings.TrimPrefix $prefix $path | default "/" }}
          {{- /* with the second check we check if the prefix was finished;
            eg. /pir/index.html vs. /pirate/index.html, were the latter is
            an external address outside of this site */}}
          {{- if and (strings.HasPrefix $path $prefix) (strings.HasPrefix $suffix "/") }}
            {{- with or
              (.GetPage $suffix)
              (.GetPage (strings.TrimRight "/" $suffix))
              (.Resources.Get $suffix)
              (and (ne .BundleType "leaf") (.CurrentSection.Resources.Get $suffix))
              (resources.Get $suffix)
            }}
              {{- $linkPage = . }}
              {{- break }}
            {{- end }}
          {{- end }}
        {{- end }}
      {{- end }}
    {{- end }}
  {{- else }}
    {{- $linkPage = $page.Page }}
  {{- end }}
  {{- with $linkPage }}
    {{- $href = partial "relLangPrettyUglyURL.hugo" (dict "to" .) }}
    {{- with $u.RawQuery }}
      {{- $href = printf "%s?%s" $href . }}
    {{- end }}
    {{- with $u.Fragment }}
      {{- $ctx := dict
        "contentPath" $page.File.Filename
        "errorLevel" $page.Site.Params.link.errorlevel
        "page" $linkPage
        "parsedURL" $u
        "renderHookName" "link"
      }}
      {{- partial "inline/h-rh-l/validate-fragment.html" $ctx }}
      {{- $href = printf "%s#%s" $href . }}
    {{- end }}
  {{- else }}
    {{- if eq $page.Site.Params.link.errorlevel "warning" }}
      {{- warnf "%q: link '%s' is not a page but linked anyways" $page.File.Filename $url }}
    {{- else if eq $page.Site.Params.link.errorlevel "error" }}
      {{- errorf "%q: link '%s' is not a page" $page.File.Filename $url }}
    {{- end }}
  {{- end }}
{{- end }}
{{- $attributes = $attributes | merge (dict "href" $href) -}}
<a
  {{- range $k, $v := $attributes }}
    {{- if $v }}
      {{- printf " %s=%q" $k $v | safeHTMLAttr }}
    {{- end }}
  {{- end }}>{{ $content | safeHTML }}</a>

{{- define "partials/inline/h-rh-l/validate-fragment.html" }}
  {{- /*
  Validates the fragment portion of a link destination.

  @context {string} contentPath The page containing the link.
  @context {string} errorLevel The error level when unable to resolve destination; ignore (default), warning, or error.
  @context {page} page The page corresponding to the link destination
  @context {struct} parsedURL The link destination parsed by urls.Parse.
  @context {string} renderHookName The name of the render hook.
  */}}

  {{- /* Initialize. */}}
  {{- $contentPath := .contentPath }}
  {{- $errorLevel := .errorLevel }}
  {{- $p := .page }}
  {{- $u := .parsedURL }}
  {{- $renderHookName := .renderHookName }}

  {{- /* Validate. */}}
  {{- with $u.Fragment }}
    {{- if $p.Fragments.Identifiers.Contains . }}
      {{- if gt ($p.Fragments.Identifiers.Count .) 1 }}
        {{- $msg := printf "%q: duplicate heading ID %q found" $contentPath . }}
        {{- if eq $errorLevel "warning" }}
          {{- warnf $msg }}
        {{- else if eq $errorLevel "error" }}
          {{- errorf $msg }}
        {{- end }}
      {{- end }}
    {{- else }}
      {{- /* Determine target path for warning and error message. */}}
      {{- $targetPath := "" }}
      {{- with $p.File }}
        {{- $targetPath = .Path }}
      {{- else }}
        {{- $targetPath = .Path }}
      {{- end }}
      {{- /* Set common message. */}}
      {{- $msg := printf "%q: heading ID %q not found in %q" $contentPath . $targetPath }}
      {{- if eq $targetPath $contentPath }}
        {{- $msg := printf "%q: heading ID %q not found" $contentPath . }}
      {{- end }}
      {{- /* Throw warning or error. */}}
      {{- if eq $errorLevel "warning" }}
        {{- warnf $msg }}
      {{- else if eq $errorLevel "error" }}
        {{- errorf $msg }}
      {{- end }}
    {{- end }}
  {{- end }}
{{- end }}