adpn-property-do

#!/bin/bash
#
# adpn-property-do: script to handle adpn property commands
#
# @version 2021.0910

SCRIPTPATH="$(which "$0")"
SCRIPTPATH="$( readlink --canonicalize "${SCRIPTPATH}" )"
SCRIPTDIR="$(dirname "${SCRIPTPATH}")"
SCRIPT="$(basename "${SCRIPTPATH}")"

source "${SCRIPTDIR}/adpn-define-aliases"

__USAGE__="Usage: ${SCRIPT} [--version] [--help] <CMD> [<ARGS>]"
__HELP__="[${SCRIPT}] Try '${SCRIPT_CMD_NAME} help' for more information."
__DOC__="""${__USAGE__}

Example: ${SCRIPT} get 'peer'

  --version 	Display the version of the script
  --help    	Display these usage notes

The most commonly used ${SCRIPT} commands are:
  get       	Retrieve the value of a chosen property from adpn settings
  set       	Assign a new value to a chosen property in adpn settings
  undo      	Undo the most recent reassignment of a property value, if backup file still exists
  list      	List the currently assigned adpn settings with their values
  
Exit codes:
0 = success (successful operation and expected result)
1-254 = error in executing command
255 = command not supported
"""

##########################################################################################
### COMMAND LINE: loop through switches ##################################################
##########################################################################################

declare -a _CMDLINE ; _CMDLINE=("$0")

declare -a SWITCHFILES ; SWITCHFILES=()
if [[ -r "${CONFFILE}" ]] ; then
	SWITCHFILES+=(${CONFFILE})
fi

CMDLINETXT=$(mktemp)

until [[ "$#" -lt 1 ]] ; do
	_CMDLINE+=("$1")
	printf "%s\n" "$1" >> "${CMDLINETXT}"
	shift
done

SWITCHFILES+=(${CMDLINETXT})

adpn_command_line "${SWITCHFILES[@]}"

rm "${CMDLINETXT}"

##########################################################################################
### SCRIPT: DETERMINE COMMAND, THEN EXECUTE PIPELINE  ####################################
##########################################################################################

EXITCODE=0
CMD="${_ARGV[1]}"

adpn_set_display_settings # V, VV, Q, QQ, DBG, DBGLEVEL, DDBG, SCRIPT_CMD_NAME / @see adpn-define-aliases
adpn_script_handle_version_or_help

if [[ -n "${_PARAM[remote]}" && -z "${_PARAM[no-remote]}" ]] ; then
	
	adpn_script_handle_remote_execution -t "property" "${_CMDLINE[@]:1}"
	EXITCODE="$?"
	
else 

case "${CMD}" in
	
	""|"list")
		adpnprop
		printf "\n"
		;;
	"get")
		adpnprop "${_ARGV[2]}"
		EXITCODE=$?
		;;
	"set")
		declare -a WORDS
		WORDS=( "${_ARGV[@]:2}" )
		if [[ -n "${_PARAM[key]}" ]] ; then
			KEY="${_PARAM[key]}"
		elif [[ -n "${WORDS[0]}" ]] ; then
			KEY="${WORDS[0]}"
			WORDS=( "${WORDS[@]:1}" )
		fi
		
		if [[ -n "${_PARAM[value]}" ]] ; then
			VALUE="${_PARAM[value]}"
		elif [[ -n "${WORDS[0]}" ]] ; then
			VALUE="${WORDS[0]}"
			WORDS=( "${WORDS[@]:1}" )
		fi
		
		APS_OUTPUT=$(mktemp)

		JSON_KEYVALUE="$( adpn-json.py --key="${KEY}" --value="${VALUE}" )"
		JSON_OTHERS="$( adpnprop --output=application/json )"
		printf "%s\n%s\n" "${JSON_OTHERS}" "${JSON_KEYVALUE}" | adpn-json.py --output="application/json;prettyprint" --cascade > "${APS_OUTPUT}"
		printf "\n" >> "${APS_OUTPUT}"

		JSONORIGINAL="$( readlink -f "${JSONCONFFILE}" )"
		JSONBACKUP="$( printf "%s~" "${JSONORIGINAL}" )"
		if [[ -r "${JSONORIGINAL}" ]] ; then
			cp "${JSONORIGINAL}" "${JSONBACKUP}"
		else
			printf "{}\n" > "${JSONBACKUP}"
		fi
		mv "${APS_OUTPUT}" "${JSONORIGINAL}"
		if [[ -z "${_PARAM[quiet]}" ]] ; then
			declare -a DIFF_SW=( "-u" )
			( diff --color /dev/null /dev/null 2>/dev/null ) && DIFF_SW+=( "--color" )
			diff "${DIFF_SW[@]}" "${JSONBACKUP}" "${JSONORIGINAL}"
		fi
				
		EXITCODE=0
		;;
	"undo")
		JSON_CURRENT="$( readlink -f "${JSONCONFFILE}" )"
		JSON_BACKUP="$( printf '%s~' "${JSON_CURRENT}" )"
		JSON_TEMP="$( mktemp )"
		[[ -r "${JSON_BACKUP}" ]] && mv "${JSON_CURRENT}" "${JSON_TEMP}" && mv "${JSON_BACKUP}" "${JSON_CURRENT}" && mv "${JSON_TEMP}" "${JSON_BACKUP}"
		if [[ -z "${_PARAM[quiet]}" ]] ; then
			declare -a DIFF_SW=( "-u" )
			( diff --color /dev/null /dev/null 2>/dev/null ) && DIFF_SW+=( "--color" )
			diff "${DIFF_SW[@]}" "${JSON_BACKUP}" "${JSON_CURRENT}"
		fi
		[[ -r "${JSON_TEMP}" ]] && rm "${JSON_TEMP}"
		;;
	"version"|"help")
		EXITCODE=0
		;;
	*)
		printf "[%s:%d] '%s' command not understood.\n" "${SCRIPT_CMD_NAME}" "${LINENO}" "${SUBCMD}" 1>&2
		printf "${__HELP__}" 1>&2
		EXITCODE=255
		;;
esac

fi 

##########################################################################################
### CLEANUP: exit with settled exit code. ################################################
##########################################################################################

exit ${EXITCODE}