FROM    alpine:3.11
WORKDIR /z
ENV     ver_asmcrypto=2821dd1dedd1196c378f5854037dda5c869313f3 \
        ver_markdownit=10.0.0 \
        ver_showdown=1.9.1 \
        ver_marked=1.0.0 \
        ver_ogvjs=1.6.1


# download
RUN     apk add make g++ git bash npm patch wget tar pigz brotli gzip unzip \
        && wget https://github.com/brion/ogv.js/releases/download/$ver_ogvjs/ogvjs-$ver_ogvjs.zip -O ogvjs.zip \
        && wget https://github.com/asmcrypto/asmcrypto.js/archive/$ver_asmcrypto.tar.gz -O asmcrypto.tgz \
        && wget https://github.com/markedjs/marked/archive/v$ver_marked.tar.gz -O marked.tgz \
        && unzip ogvjs.zip \
        && (tar -xf asmcrypto.tgz \
            && cd asmcrypto.js-$ver_asmcrypto \
            && npm install ) \
        && (tar -xf marked.tgz \
            && cd marked-$ver_marked \
            && npm install \
            && npm i grunt uglify-js -g ) \
        && mkdir /z/dist


# uncomment if you wanna test the abandoned markdown converters
#ENV     build_abandoned=1


RUN     [ $build_abandoned ] || exit 0; \
        git clone --depth 1 --branch $ver_showdown https://github.com/showdownjs/showdown/ \
        && wget https://github.com/markdown-it/markdown-it/archive/$ver_markdownit.tar.gz -O markdownit.tgz \
        && (cd showdown \
            && npm install \
            && npm i grunt -g ) \
        && (tar -xf markdownit.tgz \
            && cd markdown-it-$ver_markdownit \
            && npm install )


# build asmcrypto
RUN     cd asmcrypto.js-$ver_asmcrypto \
        && echo "export { Sha512 } from './hash/sha512/sha512';" > src/entry-export_all.ts \
        && node -r esm build.js \
        && mv asmcrypto.all.es5.js /z/dist/sha512.js


# build ogvjs
RUN     cd ogvjs-$ver_ogvjs \
        && cp -pv \
            ogv.js \
            ogv-worker-audio.js \
            ogv-demuxer-ogg.js \
            ogv-demuxer-ogg-wasm.js \
            ogv-demuxer-ogg-wasm.wasm \
            ogv-demuxer-webm.js \
            ogv-demuxer-webm-wasm.js \
            ogv-demuxer-webm-wasm.wasm \
            ogv-decoder-audio-opus.js \
            ogv-decoder-audio-opus-wasm.js \
            ogv-decoder-audio-opus-wasm.wasm \
            ogv-decoder-audio-vorbis.js \
            ogv-decoder-audio-vorbis-wasm.js \
            ogv-decoder-audio-vorbis-wasm.wasm \
            dynamicaudio.swf \
            /z/dist


# build marked
COPY    marked.patch /z/
RUN     cd marked-$ver_marked \
        && patch -p1 < /z/marked.patch \
        && npm run build \
        && cp -pv marked.min.js /z/dist/marked.js \
        && cp -pv lib/marked.js /z/dist/marked.full.js
#        && npm run test \


# build showdown (abandoned; disabled by default)
COPY    showdown.patch /z/
RUN     [ $build_abandoned ] || exit 0; \
        cd showdown \
        && rm -rf bin dist \
#       # remove ellipsis plugin \
        && rm \
            src/subParsers/ellipsis.js \
            test/cases/ellipsis* \
#       # remove html-to-md converter \
        && rm \
            test/node/testsuite.makemd.js \
            test/node/showdown.Converter.makeMarkdown.js \
#       # remove emojis \
        && rm src/subParsers/emoji.js \
        && awk '/^showdown.helper.emojis/ {o=1} !o; /^\}/ {o=0}' \
            >f <src/helpers.js \
        && mv f src/helpers.js \
        && rm -rf test/features/emojis \
#       # remove ghmentions \
        && rm test/features/ghMentions.* \
#       # remove option descriptions \
        && sed -ri '/descri(ption|be): /d' src/options.js \
        && patch -p1 < /z/showdown.patch

RUN     [ $build_abandoned ] || exit 0; \
        cd showdown \
        && grunt build \
        && sed -ri '/sourceMappingURL=showdown.min.js.map/d' dist/showdown.min.js \
        && mv dist/showdown.min.js /z/dist/showdown.js \
        && ls -al /z/dist/showdown.js


# build markdownit (abandoned; disabled by default)
COPY    markdown-it.patch /z/
RUN     [ $build_abandoned ] || exit 0; \
        cd markdown-it-$ver_markdownit \
        && patch -p1 < /z/markdown-it.patch \
        && make browserify \
        && cp -pv dist/markdown-it.min.js /z/dist/markdown-it.js \
        && cp -pv dist/markdown-it.js /z/dist/markdown-it-full.js


# compress
COPY    zopfli.makefile /z/dist/Makefile
RUN     cd /z/dist \
        && make -j$(nproc) \
        && rm Makefile


# showdown: abandoned due to code-blocks in lists failing
# 22770 orig
# 12154 no-emojis
# 12134 no-srcmap
# 11189 no-descriptions
# 11152 no-ellipsis
# 10617 no-this.makeMd
#  9569 no-extensions
#  9537 no-extensions
#  9410 no-mentions


# markdown-it: abandoned because no header anchors (and too big)
#       32322 107754 orig (wowee)
# 19619 21392  71540 less entities


# marked:
# 9253 29773 orig
# 9159 29633 no copyright (reverted)
# 9040 29057 no sanitize
# 8870 28631 no email-mangle
# so really not worth it, just drop the patch when that stops working


# f=../../copyparty/web/deps/marked.js.gz; (cd ~ed/src/ && diff -NarU1 marked-1.0.0-orig/ marked-1.0.0-edit/) >marked.patch; make && printf '%d ' $(wc -c <$f) $(gzip -d <$f | wc -c); echo