#!/bin/bash
# info: change database owner
# options: DATABASE USER
#
# example: v-change-database-owner mydb alice
#
# This function for changing database owner.

#----------------------------------------------------------#
#                Variables & Functions                     #
#----------------------------------------------------------#

# Argument definition
database=$1
user=$2

# Includes
# shellcheck source=/etc/hestiacp/hestia.conf
source /etc/hestiacp/hestia.conf
# shellcheck source=/usr/local/hestia/func/main.sh
source $HESTIA/func/main.sh
# shellcheck source=/usr/local/hestia/func/db.sh
source $HESTIA/func/db.sh
# shellcheck source=/usr/local/hestia/func/rebuild.sh
source $HESTIA/func/rebuild.sh
# load config file
source_conf "$HESTIA/conf/hestia.conf"

#----------------------------------------------------------#
#                    Verifications                         #
#----------------------------------------------------------#

check_args '2' "$#" 'DATABASE USER'
is_format_valid 'database' 'user'
is_system_enabled "$DB_SYSTEM" 'DB_SYSTEM'
is_object_valid 'user' 'USER' "$user"
is_object_unsuspended 'user' 'USER' "$user"

# Check owner existence
owner=$(echo $database | cut -f 1 -d '_')
if [ ! -d "$HESTIA/data/users/$owner" ]; then
	echo "Error: database owner doesn't exist"
	log_event "$E_NOTEXIST" "$ARGUMENTS"
	exit "$E_NOTEXIST"
fi

# Check if owner is the same as the dst user
if [ "$owner" = "$user" ]; then
	exit
fi

# Check db existence
db_data=$(grep "DB='$database'" $HESTIA/data/users/$owner/db.conf)
if [ -z "$db_data" ]; then
	echo "Error: database $database doesn't exist"
	log_event "$E_NOTEXIST" "$ARGUMENTS"
	exit "$E_NOTEXIST"
fi

parse_object_kv_list "$db_data"
#Fix issue #1084 with "Upper case not allowed with PGSQL"
if [ "$TYPE" == "pgsql" ]; then
	usersmall=$(echo "$user" | tr '[:upper:]' '[:lower:]')
else
	usersmall=$user
fi

# Check if database name is uniqe
new_db=$(echo $database | sed "s/^${owner}_/${usersmall}_/")
check_db=$(grep "DB='$new_db'" $HESTIA/data/users/$user/db.conf)
if [ -n "$check_db" ]; then
	echo "Error: $new_db database exists"
	log_event "$E_EXISTS" "$ARGUMENTS"
	exit "$E_EXISTS"
fi

# Perform verification if read-only mode is enabled
check_hestia_demo_mode

#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Creating temporary directory
tmpdir=$(mktemp -p $BACKUP -d "tmp.$database.XXXXXXXXXX")

# Suspend database
$BIN/v-suspend-database $owner $database > /dev/null 2>&1

# Dump database
dump="$tmpdir/$database.$TYPE.sql"
grants="$tmpdir/$database.$TYPE.$DBUSER"
case $TYPE in
	mysql) dump_mysql_database ;;
	pgsql) dump_pgsql_database ;;
esac

# Import configuration
db_data=$(echo "$db_data" | sed "s/'${owner}_/'${usersmall}_/g")
echo "$db_data" >> $HESTIA/data/users/$user/db.conf
parse_object_kv_list "$db_data"

# Unsuspend db
$BIN/v-unsuspend-database "$user" "$new_db" > /dev/null 2>&1

# Rebuild databases
$BIN/v-rebuild-databases "$user"

# Import dump
case $TYPE in
	mysql) import_mysql_database "$dump" ;;
	pgsql) import_pgsql_database "$dump" ;;
esac

# Deleting tmpdir
rm -rf $tmpdir

# Remove old database
$BIN/v-unsuspend-database "$owner" "$database" > /dev/null 2>&1
$BIN/v-delete-database "$owner" "$database" > /dev/null 2>&1

# Update counters
$BIN/v-update-user-counters "$owner"
$BIN/v-update-user-counters "$user"

#----------------------------------------------------------#
#                       Hestia                             #
#----------------------------------------------------------#

# Logging
log_event "$OK" "$ARGUMENTS"

exit
