# linux script framework progress about functions encapsulation
# Longwei Lai
###################################################################

source "${____FWK_SCRIPT_PATH}/lnx_fwk_log.sh"

# check specific progress is running or not
function is_progress_running()
{
    local pid="$1"
    local pids="`top -b -n1 | sed -e 's/\s*\(.*\)/\1/; s/\([0-9]*\).*/\1/; /^$/d' | tr -s '\n' " "`"
    for now_pid in $pids; do
        if [ "$now_pid" -eq "${pid}" ]; then
            echo -n "TRUE"
            return
        fi
    done

    echo -n "FALSE"
}

# kill specific progress(included child progresses)
function kill_progress()
{
    # kill child processes
    local will_kill_pid="$1"
    for child in $(ps -o pid --no-headers --ppid ${will_kill_pid}); do
        kill -9 "${child}" 1>/dev/null 2>&1
    done

    # kill self
    kill -9 "${will_kill_pid}" 1>/dev/null 2>&1
}

# check specific pidfile's progress is running or not
function is_pidfile_running()
{
    local pid_file="$1"
    if [ ! -e "${pid_file}" ]; then
        echo -n "FALSE"
        return
    fi

    local pid="`cat "${pid_file}"`"
    if [ $(is_progress_running "${pid}") = "FALSE" ]; then
        rm -rf "${pid_file}"  1>/dev/null 2>&1
        echo -n "FALSE"
        return
    fi

    echo -n "TRUE"
}

# kill specific pidfile's progress(included child progresses)
function stop_pidfile()
{
    local pid_file="$1"
    if [ "$(is_pidfile_running "${pid_file}")" = "TRUE" ]; then
        pid="`cat "${pid_file}"`"
        kill_progress "$pid"
        sleep 1.618
    fi

    if [ "$(is_pidfile_running "${pid_file}")" = "TRUE" ]; then
        echo "stop pidfile failed"
        stop_pidfile "${pid_file}"
    else
        rm -rf "${pid_file}"
    fi
}