#!/bin/bash
# info: change web domain backend template
# options: USER DOMAIN TEMPLATE [RESTART]
#
# The function changes backend template


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument defenition
user=$1
domain=$(idn -t --quiet -u "$2" )
domain_idn=$(idn -t --quiet -a "$domain")
template=$3
restart="$4"


# Includes
source $VESTA/func/main.sh
source $VESTA/func/domain.sh
source $VESTA/func/ip.sh
source $VESTA/conf/vesta.conf


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

check_args '3' "$#" 'USER DOMAIN TEMPLATE [RESTART]'
validate_format 'user' 'domain' 'template'
is_system_enabled "$WEB_BACKEND" 'WEB_BACKEND'
is_object_valid 'user' 'USER' "$user"
is_object_unsuspended 'user' 'USER' "$user"
is_object_valid 'web' 'DOMAIN' "$domain"
is_object_unsuspended 'web' 'DOMAIN' "$domain"
is_web_backend_template_valid $template
is_web_backend_pool_valid


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

# Deleting backend
rm -f $pool/$backend.conf

# Allocating backend port
backend_port=9000
ports=$(grep -v '^;' $pool/* 2>/dev/null |grep listen |grep -o :[0-9].*)
ports=$(echo "$ports" |sed "s/://" |sort -n)
for port in $ports; do
    if [ "$backend_port" -eq "$port" ]; then
        backend_port=$((backend_port + 1))
    fi
done

# Changing backend config
cat $WEBTPL/$WEB_BACKEND/$template.tpl |\
    sed -e "s|%backend_port%|$backend_port|" \
        -e "s|%user%|$user|"\
        -e "s|%domain%|$domain|"\
        -e "s|%domain_idn%|$domain_idn|"\
        -e "s|%backend%|$backend|g" > $pool/$backend.conf

# Checking backend pool configuration
if [ "$backend" = "$user" ]; then
    conf=$USER_DATA/web.conf
    fields='$DOMAIN'
    nohead=1

    for domain in $(shell_list); do

        # Parsing domain values
        get_domain_values 'web'
        ip=$(get_real_ip $IP)

        # Deleting old vhost
        tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.tpl"
        conf="$HOMEDIR/$user/conf/web/$WEB_SYSTEM.conf"
        del_web_config

        # Deleting old ssl vhost
        if [ "$SSL" = 'yes' ]; then
            tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.stpl"
            conf="$HOMEDIR/$user/conf/web/s$WEB_SYSTEM.conf"
            del_web_config
        fi

        # Adding new vhost
        upd_web_domain_values
        tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.tpl"
        conf="$HOMEDIR/$user/conf/web/$WEB_SYSTEM.conf"
        add_web_config

        # Adding new ssl vhost
        if [ "$SSL" = 'yes' ]; then
            conf="$HOMEDIR/$user/conf/web/s$WEB_SYSTEM.conf"
            tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.stpl"
            add_web_config
        fi

        # Update config
        add_object_key "web" 'DOMAIN' "$domain" 'BACKEND' 'PROXY'
        update_object_value 'web' 'DOMAIN' "$domain" '$BACKEND' "$template"
    done

    # Chaning template in user config
    old_template=$(grep BACKEND_TEMPLATE $USER_DATA/user.conf)
    if [ -z "$old_template" ]; then
        sed -i "s/^WEB_DOMAINS/BACKEND_TEMPLATE='$template'\nWEB_DOMAINS/g" \
            $USER_DATA/user.conf
    else
        update_user_value "$user" '$BACKEND_TEMPLATE' "$template"
    fi
else
    # Parsing domain values
    get_domain_values 'web'
    ip=$(get_real_ip $IP)

    # Deleting old vhost
    tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.tpl"
    conf="$HOMEDIR/$user/conf/web/$WEB_SYSTEM.conf"
    del_web_config

    # Deleting old ssl vhost
    if [ "$SSL" = 'yes' ]; then
        tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.stpl"
        conf="$HOMEDIR/$user/conf/web/s$WEB_SYSTEM.conf"
        del_web_config
    fi

    # Adding new vhost
    upd_web_domain_values
    tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.tpl"
    conf="$HOMEDIR/$user/conf/web/$WEB_SYSTEM.conf"
    add_web_config

    # Adding new ssl vhost
    if [ "$SSL" = 'yes' ]; then
        conf="$HOMEDIR/$user/conf/web/s$WEB_SYSTEM.conf"
        tpl_file="$WEBTPL/$WEB_SYSTEM/$WEB_BACKEND/$TPL.stpl"
        add_web_config
    fi

    # Update config
    add_object_key "web" 'DOMAIN' "$domain" 'BACKEND' 'PROXY'
    update_object_value 'web' 'DOMAIN' "$domain" '$BACKEND' "$template"
fi


#----------------------------------------------------------#
#                       Vesta                              #
#----------------------------------------------------------#


# Restarting web
if [ "$restart" != 'no' ]; then
    $BIN/v-restart-web
    check_result $? "Web restart failed" >/dev/null

    $BIN/v-restart-web-backend
    check_result $? "Web backend restart failed" >/dev/null
fi

# Logging
log_history "changed backend template for $domain to $template"
log_event "$OK" "$EVENT"

exit