# =================
# - Install Cryptad on Debian 9 (stretch)
# =================

# - See: 
# -    https://blog.cavebeat.org/2017/07/cryptpad-installation-on-debian-stretch/
# -
# - See also:
# -    git repository:     https://github.com/xwiki-labs/cryptpad
# -    installation guide: https://github.com/xwiki-labs/cryptpad/wiki/Installation-guide
# - 

cryptpad_url=cpad-01.oopen.de
cryptpad_url=o13-pad.oopen.de

# bei vorgeschalteter authentifizierung funktioniert 
# eine *extra* sandbox url nicht. in diesem falle die gleiche
# adresse nehmen wie für die hautp seite
#
#cryptpad_sandbox_url=cpadsb-01.oopen.de
#cryptpad_sandbox_url=o13-padsb.oopen.de
cryptpad_sandbox_url="$cryptpad_url"
cryptpad_sandbox_url="cpadsb-01.oopen.de"
cryptpad_sandbox_url="o13-padsb.oopen.de"

vhost_config_file="${cryptpad_url}.conf"


# ----------
# - Pre-requisites
# ----------

# - Install curl, git
# -
apt-get install curl git-core

# - Install Python
# -
apt-get install python-minimal python
# debian bullseye:
apt install python-is-python2 python2-minimal

# - Install compiler stuff
# -
# -    apt-get install -y g++ g++-multilib gcc gcc-multilib cpp \
# -       make automake autoconf libtool flex bison \
# -       gettext pkg-config gnu-standards \
# -       libssl-dev libreadline-dev libncurses-dev
# -
apt-get install gcc g++ make


# ---
# - Install Nginx webservice
# ---

apt-get install nginx

# - Generate Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
# -
mkdir /etc/nginx/ssl
openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048


# ----------
# - Create nginx configuration for CryptPad
# -
# - see: https://github.com/xwiki-labs/cryptpad/blob/main/docs/example.nginx.conf
# -
# ----------


# ---
# - Install NodeJS v6.x on Debian 9 Stretch
# ---

# - Creates the apt sources list file '/etc/apt/sources.list.d/nodesource.list' for 
# - the NodeSource Node.js v6.x and also adds the NodeSource signing key to your keyring
# -
# -    curl -sL https://deb.nodesource.com/setup_6.x | bash -
# -
# - Hope nodejs version 14.x will work 
# -
# -     nodejs 6.0 does not yet work for actuall etherpad, which ist also installed 
# -     on this server. 
# -
curl -sL https://deb.nodesource.com/setup_14.x | bash -
apt-get update

# - Install nodejs version 6.x from repository 'deb.nodesource.com'
# -

# - Tell the apt system to install nodejs from repository deb.nodesource.com
# -
# - You should pin the external source using the origin option to assign a high 
# - priority to "the external source" instead of using the release name.
# -
# - e,g: Add the following lines to your /etc/apt/preferences.d/preferences:
# -
# -    Package: *
# -    Pin: origin deb.nodesource.com
# -    Pin-Priority: 1001
# -
if ! $(grep -E -q "^\s*Pin:\s+origin\s+deb.nodesource.com" /etc/apt/preferences.d/preferences) ; then
   cat <<EOF >> /etc/apt/preferences.d/preferences
Package: *
Pin: origin deb.nodesource.com
Pin-Priority: 1001
EOF
fi

# - Verify with 'apt-cache policy nodejs'
# -
# - Output must conatin somethin liek that:
# -    Installationskandidat: 6.14.4-1nodesource1
# -
apt-cache policy nodejs

# - Install nodejs..
# -
apt-get install nodejs

# - An alternative possibility:
# -
# - 1. Show versions for nodejs
# -
# -    # aptitude versions nodejs
# -
# -    output may looks like:
# -
# -       i   6.14.4-1nodesource1                                     <NULL>                              500
# -       p   10.15.2~dfsg-2                                          stable                              500
# -
# - 2. install nodejs 6.14.4-1nodesource1
# -
# -    apt-get install nodejs=6.14.4-1nodesource1
# -                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
# -

# - Test if installation was successfully
# -
node -v
npm -v



# ---
# - Install bower
# ---

# - Install bower (global)
# -
npm install -g bower


# ---
# - Create the user for the service:
# ---

mkdir -p /var/www/{.cache,.config,.local,.node-gyp,.npm,.private}
chown -R www-data:www-data /var/www/{.cache,.config,.local,.node-gyp,.npm,.private}



# ---
# - Install cryptpad
# ---

cd /var/www/
chown www-data:www-data /var/www


# - Get cryptpad
# -
su www-data -s /bin/bash -c "git clone https://github.com/xwiki-labs/cryptpad /var/www/cryptpad"

cd cryptpad

# - Complete Installation of cryptpad
# -
su www-data -s /bin/bash -c "npm install"

su www-data -s /bin/bash -c "bower install"


# ---
# - Configure CryptPad
# ---

# - Create configuration file 'config.js'. (Copy the example file)
# -
# - The defaults should be good enough for most cases, but you may want to edit
# - them. We recommend you read over the example file and change the values to
# - fit your needs.
cp -a config/config.example.js config/config.js

# - Some base configuration
# -
# -    adminEmail: 'admin@oopen.de',
# -    ...
# -    httpUnsafeOrigin: http://localhost:3000
# -    httpSafeOrigin: ${cryptpad_sandbox_url}
# -    httpAddress: '::',
# -    ...
# -    myDomain: oopen.de,
# -
if $(grep -q -E "\s*/?/?\s*adminEmail" /var/www/cryptpad/config/config.js 2> /dev/null) ; then
   perl -i -n -p -e"s#(\s*)(adminEmail:.*)#\1// \2\n\1adminEmail: 'admin\@oopen.de',#" /var/www/cryptpad/config/config.js
else
   perl -i -n -p -e"s/(\s*})/    adminEmail: 'admin\@oopen.de',\n\1/" /var/www/cryptpad/config/config.js
fi

perl -i -n -p -e"s#(\s*)(httpUnsafeOrigin:.*)#\1// \2\n\1httpUnsafeOrigin: 'https://${cryptpad_url}',#" /var/www/cryptpad/config/config.js

perl -i -n -p -e"s#(\s*)(/*\s*)(httpSafeOrigin:.*)#\1// \3\n\1httpSafeOrigin: 'https://${cryptpad_sandbox_url}',#" /var/www/cryptpad/config/config.js


perl -i -n -p -e"s#(\s*)(/*\s*)(httpAddress:.*)#\1// \3\n\1httpAddress: '::',#" /var/www/cryptpad/config/config.js

# - deaktivate donate Button
# -
if $(grep -q -E "\s*/?/?\s*removeDonateButton" /var/www/cryptpad/config/config.js 2> /dev/null) ; then
   perl -i -n -p -e"s#(\s*)(/*\s*)(removeDonateButton:.*)#\1//\3\n\1removeDonateButton: true,#" /var/www/cryptpad/config/config.js
else
   perl -i -n -p -e"s/(\s*})/    removeDonateButton: true,\n\1/" /var/www/cryptpad/config/config.js
fi

# - Set storage..
# -
perl -i -n -p -e"s#(\s*)(/*\s*)(defaultStorageLimit:.*)#\1//\3\n\1defaultStorageLimit: 250 * 1024 * 1024,#" /var/www/cryptpad/config/config.js

# - Customizing CryptPad
# -
# - In order allow a variety of features to be changed and to allow site-specific
# - changes to CryptPad apps while still keeping the git repository pristine, this
# - directory exists to allow a set of hooks to be run.
# -
# - The server is configured to load files from the '/customize/' path
# - preferentially from 'cryptpad/customize/', and to fall back to 
# - 'cryptpad/customize.dist/' if they are not found.
# -
# - If you wish to customize cryptpad, please **copy**
# - '/customize.dist/' to '/customize' and then edit it there, this way you will
# - still be able to pull from (and make pull requests to (!) the git repository.
# -
cp -a /var/www/cryptpad/customize.dist /var/www/cryptpad/customize

# - Copy 'favicon.ico' to '/var/www/cryptpad/customize/main-favicon.png'
# -
cp ~chris/favicon.ico /var/www/cryptpad/customize/main-favicon.png
cp ~chris/favicon.ico /var/www/cryptpad/customize.dist/
chown www-data:www-data /var/www/cryptpad/customize/main-favicon.png
chown www-data:www-data /var/www/cryptpad/customize.dist/favicon.ico



# ---
# Systemd Unit
# ---

# - Run as daemon using systemd
# -
cat << EOF > /etc/systemd/system/cryptpad.service
[Unit]
Description=CryptPad Service
After=syslog.target network.target
Requires=nginx.service

[Service]
Type=simple
User=www-data
Group=www-data
Environment='PWD="/var/www/cryptpad"'
# modify to match the location of your cryptpad repository
WorkingDirectory=/var/www/cryptpad
ExecStart=/usr/bin/node /var/www/cryptpad/server.js

TimeoutSec=30
# Restart service after 10 seconds if node service crashes
RestartSec=2
Restart=always

# Output to syslog
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=cryptpad

## Modify these two values and uncomment them if you have lots of files and get an HTTP error 500 because of that
LimitMEMLOCK=infinity
LimitNOFILE=65535
### If you want to bind CryptPad to a port below 1024 uncomment the two values below
#CapabilityBoundingSet=CAP_NET_BIND_SERVICE
#AmbientCapabilities=CAP_NET_BIND_SERVICE

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable cryptpad

# - Start cryptpad
# -
systemctl start cryptpad


# ---
# Basic Check of your configuration:
# ---

# In yout browser type:
#
#    https://${cryptpad_url}/checkup/

# Maybe the the 'checkup' script recommends to run:
#
#  npm run build
#
# we have to do this under the webservice user www-data
#
su www-data -s /bin/bash -c "npm run build"