#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Initial reading of the configuration file, typically called freedombone.cfg
#
# License
# =======
#
# Copyright (C) 2014-2016 Bob Mottram <bob@robotics.uk.to>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

function read_config_param {
    param_name="$1"

    if [ $CONFIGURATION_FILE ]; then
        if [ -f $CONFIGURATION_FILE ]; then
            if grep -q "${param_name}=" $CONFIGURATION_FILE; then
                ${param_name}=$(cat $CONFIGURATION_FILE | grep "${param_name}=" | head -n 1 | awk -F '=' '{print $2}')
            fi
        fi
    fi
}

function read_configuration {
    # if not installing on a Beaglebone then use sdb as the USB drive by default
    if [ ! $INSTALLING_ON_BBB ]; then
        if [[ $USB_DRIVE == /dev/sda1 ]]; then
            USB_DRIVE=/dev/sdb1
        fi
    fi

    if [[ $INSTALLING_FROM_CONFIGURATION_FILE == "yes"  ]]; then
        if [ ! -f $CONFIGURATION_FILE ]; then
            echo $"The configuration file $CONFIGURATION_FILE was not found"
            exit 8935
        fi
    fi

    if [ -f $CONFIGURATION_FILE ]; then
        read_repo_servers

        # Ensure that a copy of the config exists for upgrade purposes
        if [[ $CONFIGURATION_FILE != "/root/${PROJECT_NAME}.cfg" ]]; then
            cp $CONFIGURATION_FILE /root/${PROJECT_NAME}.cfg
        fi

        read_config_param "FRIENDS_MIRRORS_SERVER"
        read_config_param "FRIENDS_MIRRORS_SSH_PORT"
        read_config_param "FRIENDS_MIRRORS_PASSWORD"
        read_config_param "MY_MIRRORS_PASSWORD"

        read_config_param "SYSTEM_TYPE"
        read_config_param "SSL_PROTOCOLS"
        read_config_param "SSL_CIPHERS"
        read_config_param "SSH_CIPHERS"
        read_config_param "SSH_MACS"
        read_config_param "SSH_KEX"
        read_config_param "SSH_HOST_KEY_ALGORITHMS"
        read_config_param "SSH_PASSWORDS"
        read_config_param "REFRESH_GPG_KEYS_HOURS"
        read_config_param "GPG_KEYSERVER"
        read_config_param "ENABLE_SOCIAL_KEY_MANAGEMENT"
        read_config_param "MY_USERNAME"
        read_config_param "DOMAIN_NAME"
        read_config_param "DEFAULT_DOMAIN_NAME"
        read_config_param "DEFAULT_DOMAIN_CODE"
        read_config_param "NAMESERVER1"
        read_config_param "NAMESERVER2"
        read_config_param "GET_IP_ADDRESS_URL"
        read_config_param "DDNS_PROVIDER"
        read_config_param "DDNS_USERNAME"
        read_config_param "DDNS_PASSWORD"
        read_config_param "LOCAL_NETWORK_STATIC_IP_ADDRESS"
        read_config_param "ROUTER_IP_ADDRESS"
        read_config_param "CPU_CORES"
        read_config_param "WEBSERVER_LOG_LEVEL"
        read_config_param "ROUTE_THROUGH_TOR"
        read_config_param "MY_NAME"
        read_config_param "MY_EMAIL_ADDRESS"
        read_config_param "INSTALLING_ON_BBB"
        read_config_param "SSH_PORT"
        read_config_param "INSTALLED_WITHIN_DOCKER"
        read_config_param "GPG_ENCRYPT_STORED_EMAIL"
        read_config_param "MY_GPG_PUBLIC_KEY"
        read_config_param "MY_GPG_PRIVATE_KEY"
        read_config_param "MY_GPG_PUBLIC_KEY_ID"
        read_config_param "USB_DRIVE"
        read_config_param "MAX_PHP_MEMORY"
        read_config_param "TLS_TIME_SOURCE1"
        read_config_param "TLS_TIME_SOURCE2"
        read_config_param "ONION_ONLY"
        read_config_param "DEFAULT_LANGUAGE"
        read_config_param "MINIMAL_INSTALL"
        read_config_param "LETSENCRYPT_SERVER"

        read_config_param "WIFI_INTERFACE"
        read_config_param "WIFI_SSID"
        read_config_param "WIFI_TYPE"
        read_config_param "WIFI_PASSPHRASE"
        read_config_param "WIFI_HOTSPOT"
        read_config_param "WIFI_NETWORKS_FILE"

        read_config_param "DEFAULT_SEARCH"
        read_config_param "SEARCH_ENGINE_PASSWORD"

        read_config_param "PROJECT_WEBSITE"
        read_config_param "PROJECT_REPO"

        read_config_param "GPGIT_REPO"
        read_config_param "GPGIT_COMMIT"

        read_config_param "NGINX_ENSITE_REPO"
        read_config_param "NGINX_ENSITE_REPO"
        read_config_param "NGINX_ENSITE_COMMIT"

        read_config_param "CLEANUP_MAILDIR_COMMIT"
        read_config_param "CLEANUP_MAILDIR_REPO"

        read_config_param "INADYN_REPO"
        read_config_param "INADYN_COMMIT"

        read_config_param "DH_KEYLENGTH"
        read_config_param "WIFI_CHANNEL"

        read_config_param "IPV6_NETWORK"
        read_config_param "HWRNG_TYPE"

        read_config_param "ENABLE_BABEL"
        read_config_param "ENABLE_BATMAN"
        read_config_param "ENABLE_CJDNS"

        read_config_param "PUBLIC_MAILING_LIST"

        if grep -q "DEBIAN_REPO" $CONFIGURATION_FILE; then
            DEBIAN_REPO=$(grep "DEBIAN_REPO" $CONFIGURATION_FILE | awk -F '=' '{print $2}')
            CHECK_MESSAGE=$"Check your internet connection, /etc/network/interfaces and /etc/resolv.conf, then delete $COMPLETION_FILE, run 'rm -fR /var/lib/apt/lists/* && apt-get update --fix-missing' and run this script again. If hash sum mismatches persist then try setting $DEBIAN_REPO to a different mirror and also change /etc/apt/sources.list."
        fi
    fi
    echo "System type: $SYSTEM_TYPE"
}

# check that domain names are sensible
function check_domains {
    if [ ${#WIKI_DOMAIN_NAME} -gt 1 ]; then
        function_check test_domain_name
        test_domain_name "$WIKI_DOMAIN_NAME"

        if [[ "$test_domain_name" == "$FULLBLOG_DOMAIN_NAME" ]]; then
            echo $'Wiki domain name is the same as blog domain name. They must be different'
            exit 97326
        fi
        if [[ "$test_domain_name" == "$MICROBLOG_DOMAIN_NAME" ]]; then
            echo $'Wiki domain name is the same as microblog domain name. They must be different'
            exit 36827
        fi
        if [[ "$test_domain_name" == "$HUBZILLA_DOMAIN_NAME" ]]; then
            echo $'Wiki domain name is the same as hubzilla domain name. They must be different'
            exit 65848
        fi
        if [ ${#GIT_DOMAIN_NAME} -gt 1 ]; then
            if [[ "$test_domain_name" == "$GIT_DOMAIN_NAME" ]]; then
                echo $'Wiki domain name is the same as Gogs domain name. They must be different'
                exit 73529
            fi
        fi
    fi

    if [ ${#FULLBLOG_DOMAIN_NAME} -gt 1 ]; then
        function_check test_domain_name
        test_domain_name "$FULLBLOG_DOMAIN_NAME"

        if [[ "$test_domain_name" == "$WIKI_DOMAIN_NAME" ]]; then
            echo $'Blog domain name is the same as wiki domain name. They must be different'
            exit 62348
        fi
        if [[ "$test_domain_name" == "$MICROBLOG_DOMAIN_NAME" ]]; then
            echo $'Blog domain name is the same as microblog domain name. They must be different'
            exit 38236
        fi
        if [[ "$test_domain_name" == "$HUBZILLA_DOMAIN_NAME" ]]; then
            echo $'Blog domain name is the same as hubzilla domain name. They must be different'
            exit 35483
        fi
        if [ $GIT_DOMAIN_NAME ]; then
            if [[ "$test_domain_name" == "$GIT_DOMAIN_NAME" ]]; then
                echo $'Blog domain name is the same as Gogs domain name. They must be different'
                exit 84695
            fi
        fi
    fi

    if [ ${#MICROBLOG_DOMAIN_NAME} -gt 1 ]; then
        function_check test_domain_name
        test_domain_name "$MICROBLOG_DOMAIN_NAME"

        if [[ "$test_domain_name" == "$WIKI_DOMAIN_NAME" ]]; then
            echo $'Microblog domain name is the same as wiki domain name. They must be different'
            exit 73924
        fi
        if [[ "$test_domain_name" == "$FULLBLOG_DOMAIN_NAME" ]]; then
            echo $'Microblog domain name is the same as blog domain name. They must be different'
            exit 26832
        fi
        if [[ "$test_domain_name" == "$HUBZILLA_DOMAIN_NAME" ]]; then
            echo $'Microblog domain name is the same as hubzilla domain name. They must be different'
            exit 678382
        fi
        if [ $GIT_DOMAIN_NAME ]; then
            if [[ "$test_domain_name" == "$GIT_DOMAIN_NAME" ]]; then
                echo $'Microblog domain name is the same as Gogs domain name. They must be different'
                exit 684325
            fi
        fi
    fi

    if [ $HUBZILLA_DOMAIN_NAME ]; then
        function_check test_domain_name
        test_domain_name "$HUBZILLA_DOMAIN_NAME"

        if [[ "$test_domain_name" == "$WIKI_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as wiki domain name. They must be different'
            exit 83682
        fi
        if [[ "$test_domain_name" == "$FULLBLOG_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as blog domain name. They must be different'
            exit 74817
        fi
        if [[ "$test_domain_name" == "$MICROBLOG_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as microblog domain name. They must be different'
            exit 83683
        fi
        if [ ${#GIT_DOMAIN_NAME} -gt 1 ]; then
            if [[ "$test_domain_name" == "$GIT_DOMAIN_NAME" ]]; then
                echo $'Hubzilla domain name is the same as Gogs domain name. They must be different'
                exit 135523
            fi
        fi
    fi

    if [ ${#GIT_DOMAIN_NAME} -gt 1 ]; then
        function_check test_domain_name
        test_domain_name "$GIT_DOMAIN_NAME"

        if [[ "$test_domain_name" == "$WIKI_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as wiki domain name. They must be different'
            exit 83682
        fi
        if [[ "$test_domain_name" == "$FULLBLOG_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as blog domain name. They must be different'
            exit 74817
        fi
        if [[ "$test_domain_name" == "$MICROBLOG_DOMAIN_NAME" ]]; then
            echo $'Hubzilla domain name is the same as microblog domain name. They must be different'
            exit 83683
        fi
        if [[ "$test_domain_name" == "$HUBZILLA_DOMAIN_NAME" ]]; then
            echo $'Microblog domain name is the same as hubzilla domain name. They must be different'
            exit 678382
        fi
    fi
}

# NOTE: deliberately no exit 0