#!/bin/bash
basedir=".."
outputdir="output/squid"
path="${basedir}/cache_domains.json"
REGEX="^\\*\\.(.*)$"

export IFS=' '

test=$(which jq);
if [ $? -gt 0 ] ; then
    echo "This script requires jq to be installed."
    echo "Your package manager should be able to find it"
    exit 1
fi

cachenamedefault="disabled"

while read -r line; do
    name=$(jq -r ".cache_domains[\"${line}\"]" config.json)
    declare "cachename${line}"="${name}"
done <<< $(jq -r '.cache_domains | to_entries[] | .key' config.json)

rm -rf ${outputdir}
mkdir -p ${outputdir}
while read -r entry; do
    unset cachename
    key=$(jq -r ".cache_domains[$entry].name" ${path})
    cachename="cachename${key}"
    if [ -z "${!cachename}" ]; then
        cachename="cachenamedefault"
    fi
    if [[ ${!cachename} == "disabled" ]]; then
        continue;
    fi
    while read -r fileid; do
        while read -r filename; do
            destfilename=$(echo ${!cachename}.txt)
            outputfile=${outputdir}/${destfilename}
            touch ${outputfile}
            while read -r fileentry; do
                # Ignore comments
                if [[ ${fileentry} == \#* ]] || [[ -z ${fileentry} ]]; then
                    continue
                fi
                # Ha wildcards to squid wildcards
                parsed=$(echo ${fileentry} | sed -e "s/^\*\./\./")
                # If we have cdn.thing and *.cdn.thing in cache_domains
                # Squid requires ONLY cdn.thing
                #
                # If the fileentry starts with *.cdn.thing
                if [[ ${fileentry} =~ $REGEX ]]; then
                    # Does the cache_domains file also contain cdn.thing
                    grep "${BASH_REMATCH[1]}" ${basedir}/${filename} | grep -v "${fileentry}" > /dev/null
                    if [[ $? -eq 0 ]]; then
                        # Skip *.cdn.thing as cdn.thing will be collected earlier/later
                        continue
                    fi
                fi
                echo "${parsed}" >> "${outputfile}"
            done <<< $(cat ${basedir}/${filename} | sort);
        done <<< $(jq -r ".cache_domains[${entry}].domain_files[${fileid}]" ${path})
    done <<< $(jq -r ".cache_domains[${entry}].domain_files | to_entries[] | .key" ${path})
done <<< $(jq -r '.cache_domains | to_entries[] | .key' ${path})

cat << EOF
Configuration generation completed.

Please copy the following files:
- ./${outputdir}/*.txt to /etc/squid/domains/
EOF