#!/bin/bash
# info: add dns record
# options: USER DOMAIN RECORD TYPE VALUE [PRIORITY] [ID] [RESTART] [TTL]
#
# example: v-add-dns-record admin acme.com www A 162.227.73.112
#
# This function is used to add a new DNS record. Complex records of TXT, MX and
# SRV types can be used by a filling in the 'value' argument. This function also
# gets an ID parameter for definition of certain record identifiers or for the
# regulation of records.

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

# Argument definition
user=$1
domain=$2
domain_idn=$2
record=$(idn2 --quiet -d "$3")
record=$(echo "$record" | tr '[:upper:]' '[:lower:]')
rtype=$(echo "$4" | tr '[:lower:]' '[:upper:]')
dvalue=$5
priority=$6
id=$7
restart=$8
ttl=$9
quiet=${10}

if [ -z "$priority" ]; then
	priority=10
fi

# 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/domain.sh
source $HESTIA/func/domain.sh
# shellcheck source=/usr/local/hestia/func/rebuild.sh
source $HESTIA/func/rebuild.sh
# load config file
source_conf "$HESTIA/conf/hestia.conf"

# Null priority for none MX/SRV records
if [ "$rtype" != 'MX' ] && [ "$rtype" != 'SRV' ]; then
	priority=''
fi

# Add trailing dot at the end of NS/CNAME/MX/PTR/SRV record
if [[ $rtype =~ ^NS|CNAME|MX|PTR|SRV ]]; then
	trailing_dot=$(echo $dvalue | grep "\.$")
	if [ -z "$trailing_dot" ]; then
		dvalue="$dvalue."
	fi
fi

if [[ $rtype =~ ^NS|CNAME|MX|PTR|SRV ]]; then
	dvalue=$(idn2 --quiet "$dvalue")
	record=$(idn2 --quiet "$record")
fi

# Cleanup quotes on dvalue
# - [CAA] records will be left unchanged
# - [SRV] will be  stripped of double quotes even when  containing spaces
# - [DNSKEY] will be  stripped of double quotes even when  containing spaces
# - Rest of record types will be striped of quotes and the final string
#   will be enclosed in double quotes if containing spaces or semicolons

if [ "$rtype" != "CAA" ]; then
	dvalue=${dvalue//\"/}
	# Add support for DS key
	if [ "$rtype" != "DNSKEY" ] && [ "$rtype" != "DS" ]; then
		if [ "$rtype" != 'SRV' ] && [[ "$dvalue" =~ [\;[:space:]] ]]; then
			dvalue='"'"$dvalue"'"'
		fi
	fi
fi

if [ "$record" = "@" ] && [ "$rtype" = "CNAME" ]; then
	check_result $E_INVALID "CNAME on root is not allowed"
fi

# Additional argument formatting
format_domain
format_domain_idn
# TODO: $domain_idn not used in this script - maybe $domain should be converted to $doman_idn ?

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

check_args '5' "$#" 'USER DOMAIN RECORD TYPE VALUE [PRIORITY] [ID] [RESTART] [TTL]'
is_format_valid 'user' 'domain' 'record' 'rtype' 'dvalue'
is_system_enabled "$DNS_SYSTEM" 'DNS_SYSTEM'
is_object_valid 'user' 'USER' "$user"
is_object_unsuspended 'user' 'USER' "$user"
is_object_valid 'dns' 'DOMAIN' "$domain"
is_object_unsuspended 'dns' 'DOMAIN' "$domain"
is_package_full 'DNS_RECORDS'
get_next_dnsrecord
is_format_valid 'id'
is_object_new "dns/$domain" 'ID' "$id"
is_dns_fqnd "$rtype" "$dvalue"
is_dns_nameserver_valid "$domain" "$rtype" "$dvalue"
is_format_valid 'ttl'
if [ -n "$restart" ]; then
	is_format_valid 'restart'
fi

# Perform verification if read-only mode is enabled
check_hestia_demo_mode

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

# Generating timestamp
time_n_date=$(date +'%T %F')
time=$(echo "$time_n_date" | cut -f 1 -d \ )
date=$(echo "$time_n_date" | cut -f 2 -d \ )

# Adding record
zone="$USER_DATA/dns/$domain.conf"
dns_rec="ID='$id' RECORD='$record' TYPE='$rtype' PRIORITY='$priority'"
dns_rec="$dns_rec VALUE='$dvalue' SUSPENDED='no' TIME='$time' DATE='$date'"
[ -n "$ttl" ] && dns_rec="$dns_rec TTL='$ttl'"
echo "$dns_rec" >> $zone
chmod 660 $zone

# Sorting records
sort_dns_records

# Update serial
update_domain_serial
# Updating zone
if [[ "$DNS_SYSTEM" =~ named|bind ]]; then
	# Do full rebuild due DNS SEC
	rebuild_dns_domain_conf
fi

# Updating dns-cluster queue
if [ "$DNS_CLUSTER" = "yes" ]; then
	# Check for first sync
	dlock=$(grep "domain $user $domain" $HESTIA/data/queue/dns-cluster.pipe)
	if [ -z "$dlock" ]; then
		cmd="$BIN/v-add-remote-dns-record $user $domain $id"
		echo "$cmd" >> $HESTIA/data/queue/dns-cluster.pipe
	fi
fi

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

# Update counters
records="$(wc -l $USER_DATA/dns/$domain.conf | cut -f1 -d ' ')"
update_object_value 'dns' 'DOMAIN' "$domain" '$RECORDS' "$records"
increase_user_value "$user" '$U_DNS_RECORDS'

# Restart named
$BIN/v-restart-dns "$restart"
check_result $? "$E_RESTART" 'dns failed to restart'

# Logging
if [ "$quiet" != "yes" ]; then
	$BIN/v-log-action "$user" "Info" "DNS" "Added DNS record (Type: $rtype, Value: $record, Domain: $domain)."
fi
log_event "$OK" "$ARGUMENTS"

exit