#!/usr/bin/env sh

FAILED=0

echo -ne "mdspell "
mdspell --version
echo -ne "mdl "
mdl --version
htmlproofer --version

# This performs spell checking and style checking over markdown files in a content
# directory. It transforms the shortcode sequences we use to annotate code blocks
# blocks into classic markdown ``` code blocks, so that the linters aren't confused
# by the code blocks
check_content() {
    DIR=$1
    LANG=$2
    TMP=$(mktemp -d)
    OUT=$(mktemp)

    # make the tmp dir
    mkdir -p ${TMP}

    # create a throwaway copy of the content
    cp -R ${DIR} ${TMP}

    # replace the {{< text >}} shortcodes with ```plain
    find ${TMP} -type f -name \*.md -exec sed -E -i "s/\\{\\{< text .*>\}\}/\`\`\`plain/g" {} ";"

    # replace the {{< /text >}} shortcodes with ```
    find ${TMP} -type f -name \*.md -exec sed -E -i "s/\\{\\{< \/text .*>\}\}/\`\`\`/g" {} ";"

    # elide url="*"
    find ${TMP} -type f -name \*.md -exec sed -E -i "s/url=\".*\"/URL/g" {} ";"

    # elide link="*"
    find ${TMP} -type f -name \*.md -exec sed -E -i "s/link=\".*\"/LINK/g" {} ";"

    mdspell ${LANG} --ignore-acronyms --ignore-numbers --no-suggestions --report ${TMP}/*.md ${TMP}/*/*.md ${TMP}/*/*/*.md ${TMP}/*/*/*/*.md ${TMP}/*/*/*/*/*.md ${TMP}/*/*/*/*/*/*.md ${TMP}/*/*/*/*/*/*/*.md >${OUT}
    if [ "$?" != "0" ]
    then
        # remove the tmp dir prefix from error messages
        sed s!${TMP}/!! ${OUT}
        echo "To learn how to address spelling errors, please see https://github.com/istio/istio.github.io#linting"
        FAILED=1
    fi

    mdl --ignore-front-matter --style mdl_style.rb ${TMP} >${OUT}
    if [ "$?" != "0" ]
    then
        # remove the tmp dir prefix from error messages
        sed s!${TMP}/!! ${OUT}
        FAILED=1
    fi

    # cleanup
    rm -fr ${TMP}
    rm -fr ${OUT}
}

check_content content --en-us
check_content content_zh --zh-cn

grep -nr -e "ERROR: markdown" ./public
if [ "$?" == "0" ]
then
    echo "Ensure text blocks are either not indented, or indented by a multiple of 4 spaces"
    FAILED=1
fi

htmlproofer ./public --check-html --assume-extension --check-external-hash --check-opengraph --timeframe 2d --storage-dir .htmlproofer --url-ignore "/localhost/,/github.com/istio/istio.github.io/edit/master/,/github.com/istio/istio/issues/new/choose/,/groups.google.com/forum/"
if [ "$?" != "0" ]
then
    FAILED=1
fi

if [ ${FAILED} -eq 1 ]
then
    echo "LINTING FAILED"
    exit 1
fi