json-to-plot

#!/usr/bin/env bash

DATA="$(cat | jq '.')"
TITLE="$(echo "$DATA" | jq '.Title')"
XLABEL="$(echo "$DATA" | jq '.XLabel')"
YLABEL="$(echo "$DATA" | jq '.YLabel')"
OUTFILE="$1"
OUTFILE_EXTENSION="$(echo "$OUTFILE" | cut -d '.' -f 2-)"

if [ -z "$DATA" ]; then
    echo "stdin must be valid json"
    exit 1
fi

if [ -z "$TITLE" ]; then
    echo ".Title must be set"
    exit 1
fi

if [ -z "$XLABEL" ]; then
    echo ".XLabel must be set"
    exit 1
fi

if [ -z "$YLABEL" ]; then
    echo ".YLabel must be set"
    exit 1
fi

if [ -z "$OUTFILE" ]; then
    echo "OUTFILE must be specified as argv[1]"
    exit 1
fi

if [ "$OUTFILE_EXTENSION" != "png" ]; then
    echo "OUTFILE must be a png"
    exit 1
fi

echo "$DATA" | jq '.data' | json-to-dsv '#' | gnuplot \
    -e "set terminal png enhanced font 'verdana,8' size 1920,1080" \
    -e "set title '$TITLE'" \
    -e "set xlabel '$XLABEL'" \
    -e "set ylabel '$YLABEL'" \
    -e "set output '$OUTFILE'" \
    -e "set datafile separator '#'" \
    -e "set nokey" \
    -e "set border linewidth 1.5" \
    -e "set style line 1 lc rgb '#0060ad' pt 7 ps .2 lt 1 lw 2 # --- blue" \
    -e "plot '< cat -' using 2:xticlabels(1) with lines ls 1"