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#!/bin/bash

# ============LICENSE_START=======================================================
# ONAP
# ================================================================================
# Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
# ================================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============LICENSE_END=========================================================

function usage() {
    echo -n "syntax: $(basename $0) "
    echo -n "[--debug] "
    echo "status|start|stop"
}

function check_x_file() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    FILE=$1
    if [[ ! -f ${FILE} || ! -x ${FILE} ]]; then
        return 1
    fi

    return 0
}

function policy_op() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    operation=$1

    cd $POLICY_HOME
    echo "[drools-pdp-controllers]"
    if check_x_file "${BIN_SCRIPT}"; then
        trap "rm -f /tmp/out$$" EXIT
        ${BIN_SCRIPT} ${operation} >/tmp/out$$
        echo " L [${controller}]: $(sed ':a;N;$!ba;s/\n/ /g' /tmp/out$$)"
    else
        echo "	L [${controller}]: -"
    fi
}

function policy_status() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    echo
    policy_op "status"

    NUM_CRONS=$(crontab -l 2>/dev/null | wc -l)
    echo "	${NUM_CRONS} cron jobs installed."

    echo
    echo "[features]"
    features status

    local databases=$(ls -d "${POLICY_HOME}"/etc/db/migration/*/ 2>/dev/null)
    if [[ -n ${databases} ]]; then
        echo "[migration]"
        db-migrator -s ALL -o ok
    fi

}

function policy_start() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    policy_op "start"
}

function policy_exec() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    cd $POLICY_HOME
    if check_x_file "${BIN_SCRIPT}"; then
        ${BIN_SCRIPT} "exec"
    fi
}

function policy_stop() {
    if [[ $DEBUG == y ]]; then
        echo "-- ${FUNCNAME[0]} --"
        set -x
    fi

    policy_op "stop"
}

#########################################################################
##
## script execution body
##
#########################################################################

source ${POLICY_HOME}/etc/profile.d/env.sh

if [[ ${DEBUG} == y ]]; then
    echo "-- $0 $* --"
    set -x
fi

BIN_SCRIPT="bin/policy-management-controller"
OPERATION=none

until [[ -z "$1" ]]; do
    case $1 in
    -d | --debug | debug)
        DEBUG=y
        set -x
        ;;
    -i | --status | status)
        OPERATION=status
        ;;
    -s | --start | start)
        OPERATION=start
        ;;
    -x | --exec | exec)
        OPERATION=exec
        ;;
    -h | --stop | stop | --halt | halt)
        OPERATION=halt
        ;;
    *)
        usage
        exit 1
        ;;
    esac
    shift
done

# operation validation
case $OPERATION in
status) ;;
start) ;;
exec) ;;
halt) ;;
*)
    echo "invalid operation \(${OPERATION}\): must be in {status|start|stop}"
    usage
    exit 1
    ;;
esac

if [[ -z ${POLICY_HOME} ]]; then
    echo "error: POLICY_HOME is unset."
    exit 1
fi

# operation validation
case $OPERATION in
status)
    policy_status
    ;;
start)
    policy_start
    ;;
exec)
    policy_exec
    ;;
halt)
    policy_stop
    ;;
*)
    echo "invalid operation \(${OPERATION}\): must be in {status|start|stop|exec}"
    usage
    exit 1
    ;;
esac