#!/bin/bash
#  _____               _           _
# |   __|___ ___ ___ _| |___ _____| |_ ___ ___ ___
# |   __|  _| -_| -_| . | . |     | . | . |   | -_|
# |__|  |_| |___|___|___|___|_|_|_|___|___|_|_|___|
#
#                              Freedom in the Cloud
#
# Upgrading functions
#
# License
# =======
#
# Copyright (C) 2014-2018 Bob Mottram <bob@freedombone.net>
#
# 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/>.

# name of a script used to upgrade the system
UPGRADE_SCRIPT_NAME="${PROJECT_NAME}-upgrade"

function create_upgrade_script {
    upgrade_command_file=$(which "${PROJECT_NAME}-upgrade")
    if [ ! -f "/etc/cron.weekly/$UPGRADE_SCRIPT_NAME" ]; then
        cp "$upgrade_command_file" "/etc/cron.weekly/$UPGRADE_SCRIPT_NAME"
    else
        HASH1=$(sha256sum "$upgrade_command_file" | awk -F ' ' '{print $1}')
        HASH2=$(sha256sum "/etc/cron.weekly/$UPGRADE_SCRIPT_NAME" | awk -F ' ' '{print $1}')
        if [[ "$HASH1" != "$HASH2" ]]; then
            cp "$upgrade_command_file" "/etc/cron.weekly/$UPGRADE_SCRIPT_NAME"
        fi
    fi

    if [[ $(is_completed "${FUNCNAME[0]}") == "1" ]]; then
        return
    fi

    apt-get -yq install unattended-upgrades

    mark_completed "${FUNCNAME[0]}"
}

function upgrade_installation_from_previous_versions {
    if [ ! -f "$COMPLETION_FILE" ]; then
        return
    fi
    if [[ $(is_completed "${FUNCNAME[0]}") == "1" ]]; then
        return
    fi

    # upgrade from previous versions
    sed -i 's|configure_email|install_email|g' "$COMPLETION_FILE"
    sed -i 's|install_dlna_server|install_dlna|g' "$COMPLETION_FILE"
    sed -i 's|install_gnu_social_theme|install_gnusocial_theme|g' "$COMPLETION_FILE"
    sed -i 's|install_gnu_social|install_gnusocial|g' "$COMPLETION_FILE"
    sed -i 's|install_irc_server|install_irc|g' "$COMPLETION_FILE"
    sed -i 's|voip_turn|turn|g' "$COMPLETION_FILE"
    sed -i 's|install_voip|install_mumble|g' "$COMPLETION_FILE"
    sed -i 's|install_rss_reader|install_rss|g' "$COMPLETION_FILE"
    sed -i 's|install_tox_node|install_tox|g' "$COMPLETION_FILE"
    sed -i 's|intrusion_detection|install_tripwire|g' "$COMPLETION_FILE"

    sed -i 's|GNU Social|gnusocial|g' "$COMPLETION_FILE"
    sed -i 's|XMPP|xmpp|g' "$COMPLETION_FILE"
    sed -i 's|voip|mumble|g' "$COMPLETION_FILE"
    sed -i 's|VoIP|mumble|g' "$COMPLETION_FILE"
    sed -i 's|Blog|htmly|g' "$COMPLETION_FILE"
    sed -i 's|Hubzilla|hubzilla|g' "$COMPLETION_FILE"
    sed -i 's|Gogs|gogs|g' "$COMPLETION_FILE"
    sed -i 's|Wiki|dokuwiki|g' "$COMPLETION_FILE"
    sed -i 's|RSS|rss|g' "$COMPLETION_FILE"
    sed -i 's|Zeronet|zeronet|g' "$COMPLETION_FILE"

    if [ -f /usr/local/bin/zeronetavahi ]; then
        rm /usr/local/bin/zeronetavahi
    fi

    mark_completed "${FUNCNAME[0]}"
}

# NOTE: deliberately no exit 0