pre.sh

#!/bin/sh

wk="$1"
mm="$2"
yyyy="$3"

burl="https://cfstore.rethinkdns.com/blocklists"
dir="bc"
codec="u6"
f="basicconfig.json"
f2="filetag.json"
cwd=`pwd`
# exec this script from npm or project root
out="./src/${codec}-${f}"
out2="./src/${codec}-${f2}"

# timestamp: 1667519318.799 stackoverflow.com/a/69400542
# nowms =`date --utc +"%s.%3N"`
now=`date --utc +"%s"`

# date from timestamp: stackoverflow.com/a/16311821
day=`date -d @$now "+%d"`
# ex: conv 08 => 8 stackoverflow.com/a/12821845
day=${day#0}
# week; ceil: stackoverflow.com/a/12536521
wkdef=$(((day + 7 -1) / 7))
# year
yyyydef=`date -d @$now "+%Y"`
# month
mmdef=`date -d @$now "+%m"`

# defaults: stackoverflow.com/a/28085062
: "${wk:=$wkdef}" "${mm:=$mmdef}" "${yyyy:=$yyyydef}"

# stackoverflow.com/a/1445507
max=4
# 0..4 (5 loops)
for i in `seq 0 $max`
do
    echo "x=== pre.sh: $i try $yyyy/$mm-$wk at $now from $cwd"

    # TODO: check if the timestamp within the json file is more recent
    # file/symlink exists? stackoverflow.com/a/44679975
    if [ -f "${out}" ] || [ -L "${out}" ]; then
        echo "=x== pre.sh: no op"
        exit 0
    else
        wget -q "${burl}/${yyyy}/${dir}/${mm}-${wk}/${codec}/${f}" -O "${out}"
        wcode=$?

        if [ $wcode -eq 0 ]; then
            # baretimestamp=$(cut -d"," -f8 "$out" | cut -d":" -f2 | grep -o -E '[0-9]+' | tail -n1)
            fulltimestamp=$(cut -d"," -f8 "$out" | cut -d":" -f2 | tr -dc '0-9/')
            echo "==x= pre.sh: $i ok $wcode; filetag? ${fulltimestamp}"
            wget -q "${burl}/${fulltimestamp}/${codec}/${f2}" -O "${out2}"
            wcode2=$?
            if [ $wcode2 -eq 0 ]; then
              echo "===x pre.sh: $i filetag ok $wcode2"
              exit 0
            else
              echo "===x pre.sh: $i not ok $wcode2"
              rm ${out}
              rm ${out2}
            fi
        else
            # wget creates blank files on errs
            rm ${out}
            echo "==x= pre.sh: $i not ok $wcode"
        fi
    fi

    # see if the prev wk was latest
    wk=$((wk - 1))
    if [ $wk -eq 0 ]; then
        # only feb has 28 days (28/7 => 4), edge-case overcome by retries
        wk="5"
        # prev month
        mm=$((mm - 1))
    fi
    if [ $mm -eq 0 ]; then
        mm="12"
        # prev year
        yyyy=$((yyyy - 1))
    fi
done

exit 1