#!/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" || exit 346735
    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
    systemctl restart i2p
}

function remove_i2p {
    service i2p stop
    apt-get -yq remove i2p-router --purge
    apt-get -yq remove i2p --purge
    apt-get -yq remove i2p-keyring --purge
    apt-get -yq autoremove

    # 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

    if [ -d /var/lib/i2p ]; then
        rm -rf /var/lib/i2p
    fi
    if [ -d /etc/i2p ]; then
        rm -rf /etc/i2p
    fi
    if [ -d /usr/share/i2p ]; then
        rm -rf /usr/share/i2p
    fi
    if [ -d /var/log/i2p ]; then
        rm /var/log/i2p
    fi
    rm -rf /tmp/i2p*
    rm /etc/apt/sources.list.d/i2p.list
}

function i2p_enable_sam {
    if [ ! -f /var/lib/i2p/i2p-config/clients.config ]; then
        service i2p stop

        apt-get -yq remove i2p i2p-keyring --purge
        apt-get -yq remove i2p-router --purge
        if [ -d /var/lib/i2p ]; then
            rm -rf /var/lib/i2p
        fi
        if [ -d /etc/i2p ]; then
            rm -rf /etc/i2p
        fi
        if [ -d /usr/share/i2p ]; then
            rm -rf /usr/share/i2p
        fi
        if [ -d /var/log/i2p ]; then
            rm /var/log/i2p
        fi
        rm -rf /tmp/i2p*
        apt-get -yq install i2p i2p-keyring
        apt-get -yq install i2p-router --reinstall
        systemctl restart i2p
        sleep 10
    fi
    if [ ! -f /var/lib/i2p/i2p-config/clients.config ]; then
        echo $'File not found /var/lib/i2p/i2p-config/clients.config'
        exit 483648364834
    fi
    sed -i 's|clientApp.1.startOnLoad=.*|clientApp.1.startOnLoad=true|g' /var/lib/i2p/i2p-config/clients.config
    systemctl restart i2p
}

# NOTE: deliberately no exit 0