Generate JSON objects filled with custom keys and values

build-json-objects.sh

#! /usr/bin/env bash
#
# [ build-json-object.sh ]
#
#    Generate JSON objects filled with custom keys and values
#    Created on 20200616 by h8rt3rmin8r
#

## Declare variables

_ak=$'\u002A'
_co=$'\u003A'
_ds=$'\u002D'
_q1=$'\u0027'
_q2=$'\u0022'
_sp=$'\u0020'
_cba=$'\u007B'
_cbb=$'\u007D'
_usd=$'\u0024'
arg_a=""
arg_b=""
n_x=1

## Parse user inputs

if [[ "x${1}" == "x" || "${1}" == "-h" || "${1}" =~ ^[-]+help$ ]]; then
    echo "Usage: --key=value ... --key=value"
    exit 0
fi

while [[ "$#" -gt 0 ]]; do
    if [[ ! "${1}" =~ "=" ]]; then
        echo "ERROR: Improperly formatted 'key=value' syntax detected"
        exit 1
    fi

    key_a="${1//[=]*}"
    key_b="${key_a#[-]}"
    key_c="${key_b#[-]}"
    key="${key_c// /_}"
    val_a="${1//*[=]}"
    val="${val_a//[\'\"]}"

    if [[ "x${key}" == "x" || "${val}" == "x" ]]; then
        echo "ERROR: Improperly formatted 'key=value' syntax detected"
        exit 1
    fi

    x_x="x${n_x}x"

    arg_a="${arg_a}${_ds}${_ds}arg${_sp}${x_x}${_sp}${_q2}${val}${_q2}${_sp}"
    arg_b="${arg_b}${key}${_co}${_usd}${x_x},"

    let n_x=n_x+1

    shift 1
done

arg_b="${arg_b%,}"
cmd_x="jq${_sp}${arg_a}${_q1}.${_ak}${_cba}${arg_b}${_cbb}${_q1}${_sp}<<<${_q1}${_cba}${_cbb}${_q1}"
cmd_y="jq${_sp}${arg_a}${_q1}.${_ak}${_cba}${arg_b}${_cbb}${_q1}"

if [ -t 0 ]; then
    eval ${cmd_x}
else
    eval ${cmd_y}
fi

exit $?