#!/bin/bash
# shellcheck disable=2034,2059
true
# shellcheck source=lib.sh
. <(curl -sL https://raw.githubusercontent.com/nextcloud/vm/master/lib.sh)

# Tech and Me © - 2018, https://www.techandme.se/

# Check for errors + debug code and abort if something isn't right
# 1 = ON
# 0 = OFF
DEBUG=0
debug_mode

# Must be root
root_check

# Check Ubuntu version
check_distro_version

# Check if dir exists
if [ ! -d $SCRIPTS ]
then
    mkdir -p $SCRIPTS
fi

# Install Redis
install_if_not php-redis
install_if_not redis-server

# Set globally doesn't work for some reason
# touch /etc/php/7.0/mods-available/redis.ini
# echo 'extension=redis.so' > /etc/php/7.0/mods-available/redis.ini
# phpenmod redis
# Setting direct to apache2 works if 'libapache2-mod-php7.0' is installed
echo 'extension=redis.so' >> /etc/php/7.2/apache2/php.ini
service apache2 restart

# Prepare for adding redis configuration
sed -i "s|);||g" $NCPATH/config/config.php

# Add the needed config to Nextclouds config.php
cat <<ADD_TO_CONFIG >> $NCPATH/config/config.php
  'memcache.local' => '\\OC\\Memcache\\Redis',
  'filelocking.enabled' => true,
  'memcache.distributed' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' =>
  array (
    'host' => '$REDIS_SOCK',
    'port' => 0,
    'timeout' => 0.5,
    'dbindex' => 0,
    'password' => '$REDIS_PASS',
  ),
);
ADD_TO_CONFIG

## Redis performance tweaks ##
if ! grep -Fxq "vm.overcommit_memory = 1" /etc/sysctl.conf
then
    echo 'vm.overcommit_memory = 1' >> /etc/sysctl.conf
fi

# Disable THP
if ! grep -Fxq "never" /sys/kernel/mm/transparent_hugepage/enabled
then
    echo "never" > /sys/kernel/mm/transparent_hugepage/enabled
fi

# Raise TCP backlog
#if ! grep -Fxq "net.core.somaxconn" /proc/sys/net/core/somaxconn
#then
#    sed -i "s|net.core.somaxconn.*||g" /etc/sysctl.conf
#    sysctl -w net.core.somaxconn=512
#    echo "net.core.somaxconn = 512" >> /etc/sysctl.conf
#fi
sed -i "s|# unixsocket .*|unixsocket $REDIS_SOCK|g" $REDIS_CONF
sed -i "s|# unixsocketperm .*|unixsocketperm 777|g" $REDIS_CONF
sed -i "s|^port.*|port 0|" $REDIS_CONF
sed -i "s|# requirepass .*|requirepass $REDIS_PASS|g" $REDIS_CONF
sed -i 's|# rename-command CONFIG ""|rename-command CONFIG ""|' $REDIS_CONF
redis-cli SHUTDOWN

# Secure Redis
chown redis:root /etc/redis/redis.conf
chmod 600 /etc/redis/redis.conf

apt update -q4 & spinner_loading
apt autoremove -y
apt autoclean

exit