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

export IFS=' '

test=$(which jq);
out=$?
if [ $out -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 ${fileentry} ]]; then
                                        continue
                                fi
				# Handle wildcards to squid wildcards
                                parsed=$(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