#! /bin/sh

#
# Parses a database URL in the format schema://user:
#

DB_URL="$1";

SCHEMA="${DB_URL%//*}";
SCHEMALESS_URL=${DB_URL#*//};
LEFT_HAND=${SCHEMALESS_URL%@*};
if test ! ${LEFT_HAND} = ${SCHEMALESS_URL}; then
    USERNAME=$(echo ${LEFT_HAND} | cut -d ':' -f 1);
    if test ! ${USERNAME} = ${LEFT_HAND}; then
        PASSWORD=$(echo ${LEFT_HAND} | cut -d ':' -f 2);
    fi
fi
RIGHT_HAND=${SCHEMALESS_URL#*@};
HOST=$(echo ${RIGHT_HAND} | cut -d ':' -f 1 | cut -d '/' -f 1);
if test -n "$(echo ${RIGHT_HAND} | grep -o ':')"; then
    PORT=$(echo ${RIGHT_HAND} | cut -d ':' -f 2 | cut -d '/' -f 1);
fi
if test -n "$(echo ${RIGHT_HAND} | grep -o '/')"; then
    DATABASE=$(echo ${RIGHT_HAND} | cut -d ':' -f 2 | cut -d '/' -f 2);
fi

# throw an error if DB_URL does not contains at least a HOST
if test -z "${HOST}"; then
    echo "database URL providen was invalid" && exit 1;
fi

cat << HEREDOC
DB_SCHEMA=${SCHEMA%:}
DB_USERNAME=${USERNAME}
DB_PASSWORD=${PASSWORD}
DB_HOST=${HOST}
DB_PORT=${PORT}
DB_NAME=${DATABASE}
HEREDOC