#!/bin/bash

echo "####################################################################"
echo "# docker_mariadb delete_database_from_customer script              #"
echo "# Dennis Buchhorn - bucde@b-eit.de                                 #"
echo "####################################################################"
echo "# WARNING: password is plain text!                                 #"
#echo "#  #"
echo "####################################################################"
echo ""

MARIADB_CONTAINER_NAME=""
MARIADB_ROOT_PASSWORD=""

TMP=$(docker container ls --format "{{.Names}}")

for ENTRY in $TMP; do
    CONTAINER_LIST+=($ENTRY)
done

if [[ ${#CONTAINER_LIST[@]} > 0 ]]; then
    echo "List of all running containers:"

    for I in ${!CONTAINER_LIST[@]}; do
        echo "  Number [$I]: ${CONTAINER_LIST[$I]}"
    done
else
    echo "No containers running!"

    exit 1
fi

read -p "Enter mariadb container number: " TMP

MARIADB_CONTAINER_NAME="${CONTAINER_LIST[$TMP]}"

read -p "Enter mariadb root password: " MARIADB_ROOT_PASSWORD

rm -f tmp
touch tmp
echo "SELECT user FROM mysql.user;" >> tmp

TMP=$(cat tmp | docker exec -i $MARIADB_CONTAINER_NAME mysql -uroot -p$MARIADB_ROOT_PASSWORD -BN)

rm -f tmp

for ENTRY in $TMP; do
    if ! [[ $ENTRY == "root" || $ENTRY == "mariadb.sys" ]]; then
        CUSTOMER_LIST+=($ENTRY)
    fi
done

if [[ ${CUSTOMER_LIST[@]} > 0 ]]; then
    echo "List of all customers:"

    for I in ${!CUSTOMER_LIST[@]}; do
        echo "  Number [$I]: ${CUSTOMER_LIST[$I]}"
    done
else
    echo "No customers!"

    exit 1
fi

read -p "Enter customer number: " TMP

MARIADB_CUSTOMER_NAME="${CUSTOMER_LIST[$TMP]}"

rm -f tmp
touch tmp
echo "SELECT db FROM mysql.db WHERE user='$MARIADB_CUSTOMER_NAME';" >> tmp

TMP=$(cat tmp | docker exec -i $MARIADB_CONTAINER_NAME mysql -uroot -p$MARIADB_ROOT_PASSWORD -BN)

rm -f tmp

for ENTRY in $TMP; do
    DATABASE_LIST+=($ENTRY)
done

if [[ ${#DATABASE_LIST[@]} > 0 ]]; then
    echo "List of all databases from $MARIADB_CUSTOMER_NAME:"

    for I in ${!DATABASE_LIST[@]}; do
        echo "  Number [$I]: ${DATABASE_LIST[$I]}"
    done
else
    echo "No databases!"

    exit 1
fi

read -p "Enter database number: " TMP

MARIADB_DATABASE_NAME="${DATABASE_LIST[$TMP]}"

read -p "!!! WARNING !!! Database '$MARIADB_DATABASE_NAME' will be deleted! Press ENTER to continue or CTRL+C to abort..."

rm -f tmp
touch tmp
echo "REVOKE ALL PRIVILEGES ON $MARIADB_DATABASE_NAME.* FROM '$MARIADB_CUSTOMER_NAME';" >> tmp
echo "DROP DATABASE IF EXISTS $MARIADB_DATABASE_NAME;" >> tmp

TMP=$(cat tmp | docker exec -i $MARIADB_CONTAINER_NAME mysql -uroot -p$MARIADB_ROOT_PASSWORD -BN)

rm -f tmp

echo "Done!"