{{- $content := .content -}}
{{- $page := .page -}}

{{- /* Convert link lists */ -}}
{{- $listPattern := `(?m)^\* \[([^\]]+)\]\[(\d+)\]$` -}}
{{- range findRE $listPattern $content }}
    {{- /* Extract text and reference number */ -}}
    {{- $fullMatch := . -}}
    {{- $text := replaceRE $listPattern `$1` . -}}
    {{- $refNum := replaceRE $listPattern `$2` . -}}

    {{- /* Step 2: Find the corresponding reference link */ -}}
    {{- $refPattern := printf `(?m)^\[%s\]: (.+)$` $refNum -}}
    {{- $refMatch := findRE $refPattern $content -}}

    {{- if gt (len $refMatch) 0 }}
        {{- $url := replaceRE $refPattern `$1` (index $refMatch 0) -}}

        {{- /* Step 3: Replace original list item with => link format */ -}}
        {{- $newLine := printf "=> %s %s" $url $text -}}
        {{- $content = replace $content $fullMatch $newLine -}}

        {{- /* Step 4: Remove the reference definition */ -}}
        {{- $content = replace $content (index $refMatch 0) "" -}}
    {{- end -}}
{{- end -}}

{{- /* Convert links */ -}}
{{- $content = $content | replaceRE `([^\w])\[([^\]]+)\]\[(\d+)\]` "$1$2[$3]" -}}
{{- $content = $content | replaceRE `(?m)^\[(\d+)\]: (.*)$` "=> $2 [$1] $2" -}}
{{- $content = $content | replaceRE `\[([^\]]+)\]\([^\)]+\)` "$1" -}}

{{- /* Replace audio tags */ -}}
{{- $audioRE := `<audio controls src="(.*/([^"]+))"></audio>` -}}
{{- range findRE $audioRE $content -}}
	{{- $url := . | replaceRE $audioRE "$1" | replaceRE ` ` "%20" -}}
	{{- $title := . | replaceRE $audioRE "$2" -}}
	{{- $content = replace $content . (printf "=> %s %s" $url (substr $title 0 -4)) -}}
{{- end -}}

{{- /* Photo processing */ -}}
{{- range findRE `{{<(dither|thumbnail) [^/]+/>}}` $content -}}
	{{- $rendered := $page.RenderString . -}}
	{{- $url := $rendered | replaceRE `(?s).*src="([^"]+)".*` "=> $1" -}}
	{{- $content = replace $content . $url -}}
{{- end -}}

{{- /* Misc. markup fixes */ -}}
{{- $content = $content | replaceRE `<!--more-->\n+` "" -}}
{{- $content = $content | replaceRE `(?m)^  >` ">" -}}
{{- $content = $content | replaceRE `(?m)^  \*` "* ⇢" -}}
{{- $content = $content | replaceRE `(?m)^- ` "* " -}}
{{- $content = $content | replaceRE `(?m)^[\*-]{3}$` "✱ ✱ ✱" -}}
{{- $content = $content | replaceRE `=> (/.+\.pdf)` (printf "=> %s$1" site.BaseURL) -}}
{{- $content = $content | replaceRE `(?m)\n{3,}` "\n\n" }}

{{- $content | safeHTML -}}