#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# i2p functions
#
# There's a problem with installing this onto mesh images, which is
# that qemu appears to run out of RAM when using yarn to add webpack.
#
# License
# =======
#
# Copyright (C) 2017-2018 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/>.

I2P_DOMAIN='deb.i2p2.de'

function install_i2p {
    if [ ! -d $INSTALL_DIR ]; then
       mkdir -p $INSTALL_DIR
    fi

    # install the gpg key
    cd $INSTALL_DIR
    if [ -f i2p-debian-repo.key.asc ]; then
        rm i2p-debian-repo.key.asc
    fi
    wget https://geti2p.net/_static/i2p-debian-repo.key.asc
    if [ ! -f i2p-debian-repo.key.asc ]; then
        echo $'failed to ontain i2p repo gpg key'
        exit 7834627345
    fi
    apt-key add i2p-debian-repo.key.asc

    echo "deb https://${I2P_DOMAIN}/ stretch main" > /etc/apt/sources.list.d/i2p.list
    echo "deb-src https://${I2P_DOMAIN}/ stretch main" >> /etc/apt/sources.list.d/i2p.list

    # i2p needs ipv6 to be enabled
    sed -i 's|net.ipv6.conf.all.disable_ipv6.*|net.ipv6.conf.all.disable_ipv6 = 0|g' /etc/sysctl.conf
    /sbin/sysctl -p -q

    apt-get update
    apt-get -yq install i2p i2p-keyring
}

function remove_i2p {
    apt-get -yq remove i2p i2p-keyring --purge

    # It's assumed here that ipv6 is only needed for i2p
    # This might not be true in future
    sed -i 's|net.ipv6.conf.all.disable_ipv6.*|net.ipv6.conf.all.disable_ipv6 = 1|g' /etc/sysctl.conf
    /sbin/sysctl -p -q
}

function i2p_enable_sam {
    sed -i 's|clientApp.1.startOnLoad=.*|clientApp.1.startOnLoad=true|g' /var/lib/i2p/i2p-config/clients.config
    systemctl restart i2p
}