#!/bin/bash

URL="https://fos.wiki.devuan.org"

filter="
 -name _default -prune -o \
 -name _empty -prune -o \
 -name System -prune -o \
 -name Trash -prune -o \
 -name TWiki -prune -o \
"

pushd /opt/mergedWork

find /opt/Foswiki/data  ${filter} \
-name "*.txt" -type f,l -printf "%P\n" | while read line
do
    base=`echo "${line}" | cut -d '/' -f 1`
    file=`echo "${line}" | cut -d '/' -f 2- | rev | cut -b 5- | rev`
    mkdir -p Foswiki/$base
    mkdir -p Foswiki/${base}/`dirname ${file}`
    mkdir -p combined/$base
    mkdir -p combined/${base}/`dirname ${file}`
    echo "Converting ${URL}/${base}/${file}?cover=print -> Foswiki/${base}/${file}.md"
    # Doesn't help with redownloads, coz natch a dynamic site isn't cached.  But I can at least comment out the curl command during testing to save time.
    curl --silent --no-progress-meter ${URL}/${base}/${file}?cover=print -o Foswiki/${base}/${file}.HTM
    cp Foswiki/${base}/${file}.HTM Foswiki/${base}/${file}.HTM_ORIGINAL
    csplit -ks Foswiki/${base}/${file}.HTM '%<div id="patternMainContents">%' '/<div class="foswikiAttachments foswikiFormStep" style="overflow:auto">/'
    if [ -f xx00 ]; then
	rm Foswiki/${base}/${file}.HTM
	mv xx00 Foswiki/${base}/${file}.HTM
    fi
    sed -i -E Foswiki/${base}/${file}.HTM \
	-e "s/rel='nofollow'//g" \
	-e 's/rel="nofollow"//g' \
	-e "s/target='_blank'//g" \
	-e "s/class='foswiki[[:alpha:]]*'//g" \
	-e 's/class="foswikiTopic"/class="FoswikiTopic"/g' \
	-e 's/class="foswiki[[:alpha:]]*"//g' \
	-e "s/style='.*;'//g"

    pandoc -f html -t commonmark_x --self-contained Foswiki//${base}/${file}.HTM >Foswiki/${base}/${file}.md
    cp Foswiki/${base}/${file}.md Foswiki/${base}/${file}.md_ORIGINAL

    csplit -ks Foswiki/${base}/${file}.md '%::: {.FoswikiTopic}%' '/::: {.patternInfo}/'
    if [ -f xx00 ]; then
	rm Foswiki/${base}/${file}.md
	mv xx00 Foswiki/${base}/${file}.md
    fi

    # Attempt to clean things up, badly.
    sed -i -E Foswiki/${base}/${file}.md \
	-e 's/\$/\$dlr\$/g' \
	-e 's/\{#.*\}//g' \
	-e '/^:::/d' \
	-e '/^<!-- -->/d' \
#	-e 's/\{\.pattern.*\}//g' \
#	-e 's/\{\.pattern.*//g' \

    echo -e "****\n[Original page](${URL}/${base}/${file}) where maybe you can edit it." >> Foswiki/${base}/${file}.md
    ln -frs Foswiki/${base}/${file}.md combined/${base}/${file}.md

    if [ -f xx01 ]; then
	rm xx01
    fi
done

popd