convert bash arrays to json

dict2json.sh

#!/usr/bin/env bash

dict2json() {
        local _data=""
        trap 'if [[ -n "${_data}" ]]; then printf "{%s}" "${_data%?}" | jq -arc .; fi' RETURN
        case "${#@}" in
                0)
                        return
                        ;;
                1)
                        local _copy_decl="$(declare -p "${1}" 2>/dev/null)"
                        case "${_copy_decl}" in
                                "declare -a"*" ${1}="*)
                                        _copy_decl="$(sed "s/^declare -a.* ${1}=//" <<<"${_copy_decl}")"
                                        if ! eval "local -a _dict=${_copy_decl}"; then return 2; fi
                                        for key in "${!_dict[@]}"; do
                                                _data+="$(printf '"%s": %s,' "${key}" "$(printf '%s' "${_dict["${key}"]}" | jq -aMRs .)")"
                                        done
                                        ;;
                                "declare -A"*" ${1}="*)
                                        _copy_decl="$(sed "s/^declare -A.* ${1}=//" <<<"${_copy_decl}")"
                                        if ! eval "local -A _dict=${_copy_decl}"; then return 2; fi
                                        for key in "${!_dict[@]}"; do
                                                _data+="$(printf '"%s": %s,' "${key}" "$(printf '%s' "${_dict["${key}"]}" | jq -aMRs .)")"
                                        done
                                        ;;
                                *)
                                        return 127
                                        ;;
                        esac
                        ;;
                *)
                        local -a _arg_dict=("${@}")
                        for _i in $(seq 1 "${#@}"); do
                                if [[ $((_i % 2)) -eq 0 ]]; then
                                        continue
                                fi
                                local _key="${_arg_dict["$((_i - 1))"]}"
                                local _val="${_arg_dict["${_i}"]}"
                                _data+="$(printf '"%s": %s,' "${_key}" "$(printf '%s' "${_val}" | jq -aMRs .)")"
                        done
                        ;;
        esac
}

declare -fx dict2json

if [[ ${#@} -gt 0 ]]; then
        dict2json "${@}"
fi