#!/bin/sh
#
# 2017 ungleich GmbH (cdist at ungleich.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#

os=$(cat "$__global/explorer/os")
if [ ! "$os" = "debian" ]
then
    echo "OS $os is currently not supported." >&2
    exit 1
fi
os_version=$(cat "$__global/explorer/os_version")
case "$os_version" in
    8*)
        :
    ;;
    *)
        echo "Unsupported version $os_version of $os." >&2
        exit 1
    ;;
esac

db_pass=$(cat "$__object/parameter/db-pass")
db_user=$(cat "$__object/parameter/db-user")
db_name=$(cat "$__object/parameter/db-name")
domain="$(cat "$__object/parameter/domain")"
dh="$(cat "$__object/parameter/dh")"

case "$os" in
    centos)
        nginx_http=/etc/nginx/conf.d/http.conf
        nginx_https=/etc/nginx/conf.d/https.conf
        restart="systemctl restart nginx"

    ;;
    debian)
        nginx_http=/etc/nginx/sites-enabled/default
        nginx_https=/etc/nginx/sites-enabled/default-ssl
        restart="systemctl restart nginx"
    ;;
    devuan)
        nginx_http=/etc/nginx/sites-enabled/default
        nginx_https=/etc/nginx/sites-enabled/default-ssl
        restart="/etc/init.d/nginx restart"
    ;;
    *)  
        echo "Unsupported OS: $os" >&2
        exit 1
    ;;
esac

if [ -f "$__object/parameter/custom-config-from-stdin" ]; then
    custom_config="$__object/stdin"
else
    custom_config=""
fi

# Install packages
for package in php7.0-common php7.0-gd php7.0-json php7.0-pgsql php7.0-curl \
			   php7.0-intl php7.0-mcrypt php7.0-imagick \
               php7.0-zip php7.0-apcu php7.0-mbstring php7.0-xml php7.0-fpm \
               nginx
    do require="__apt_update_index" __package $package --state=present
done

__package postgresql --state=present
__package curl --state=present

# Configure packages 
## PHP 7 
__apt_key_uri dotdeb --uri https://www.dotdeb.org/dotdeb.gpg
require="__apt_key_uri/dotdeb" __apt_source dotdeb --uri http://packages.dotdeb.org \
                                                   --distribution jessie \
                                                   --component all

require="__apt_source/dotdeb" __apt_update_index

require="__package/php7.0-fpm" __file /etc/php/7.0/fpm/pool.d/www.conf \
    --owner root --group root --mode 644 --source "$__type/files/fpm.conf"



# Configure nginx
#require="__package/nginx" __file /etc/nginx/sites-enabled/nextcloud --owner www-data \
#    --group www-data --mode 755 --source "$__type/files/nextcloud.nginx"

base_config="$__type/files/base_config/${os}.conf"
require="__package/nginx" __file /etc/nginx/nginx.conf --source "$base_config" --mode 0644

################################################################################
# create base / switch to type dir
#
mkdir "$__object/files"
cd  "$__type/files"

################################################################################
# SSL / HTTPs configuration
#
if [ -f "$__object/parameter/ssl" ]; then
    if [ ! -f "$__object/parameter/ssl-cert" ] || [ ! -f "$__object/parameter/ssl-key" ]  || [ ! -f "$__object/parameter/dh" ]; then
            echo "Missing parameter" >&2
        else
            ssl_cert="$(cat "$__object/parameter/ssl-cert")"
            ssl_key="$(cat "$__object/parameter/ssl-key")"
    
            # create symlink for SSL certificates
            require="__package/nginx" __link /etc/nginx/ssl.crt \
            --source "$ssl_cert" --type symbolic

            require="__package/nginx" __link /etc/nginx/ssl.key \
            --source "$ssl_key" --type symbolic
    
            # create the https nginx config
            require="__package/nginx" __file "$nginx_https"  --owner root \
            --group root \
            --mode 0644 --source - <<EOF
#                                                                    
# cdist maintained configuration - do not overwrite                  
#        

uptream php-handler {
    server unix:/run/php/php7.0-fpm.sock;
}

server {
    listen [::]:80;
    server_name ${domain};
    # Let's encrypt
    location /.well-known {
        root /var/www/nextcloud;
    }

    # enforce https
    return 301 https://$server_name$request_uri;
}

server {
    listen [::]:443 ssl;
    server_name ${domian};
    ssl_certificate         /etc/nginx/ssl.crt;
    ssl_certificate_key     /etc/nginx/ssl.key;
    ssl_dhparam             /etc/nginx/dhparam.pem;
    
    # OCSP
    ssl_stapling on;
    ssl_stapling_verify on;

    # Chipers
    ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
    ssl_ciphers EECDH+AESGCM:EDH+AESGCM:EECDH:EDH:!MD5:!RC4:!LOW:!MEDIUM:!CAMELLIA:!ECDSA:!DES:!DSS:!3DES:!NULL;
    ssl_prefer_server_ciphers on;
    ssl_ecdh_curve secp384r1;

    # Add headers to serve security related headers
    # Before enabling Strict-Transport-Security headers please read into this
    # topic first.
    add_header Strict-Transport-Security "max-age=15768000;
    includeSubDomains; preload;";
    add_header X-Content-Type-Options nosniff;
    add_header X-Frame-Options "SAMEORIGIN";
    add_header X-XSS-Protection "1; mode=block";
    add_header X-Robots-Tag none;
    add_header X-Download-Options noopen;
    add_header X-Permitted-Cross-Domain-Policies none;

    # Session resumption
    ssl_session_timeout 10m;
    ssl_session_cache off;
    ssl_session_tickets on;
    ssl_session_ticket_key /etc/nginx/nginx-ticketkey;

    # Path to the root of your installation
    root /var/www/nextcloud/;

    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }

    # The following 2 rules are only needed for the user_webfinger app.
    # Uncomment it if you're planning to use this app.
    #rewrite ^/.well-known/host-meta /public.php?service=host-meta last;
    #rewrite ^/.well-known/host-meta.json /public.php?service=host-meta-json
    # last;

    location = /.well-known/carddav {
      return 301 $scheme://$host/remote.php/dav;
    }
    location = /.well-known/caldav {
      return 301 $scheme://$host/remote.php/dav;
    }

    # set max upload size
    client_max_body_size 512M;
    fastcgi_buffers 64 4K;

    # Disable gzip to avoid the removal of the ETag header
    gzip off;

    # Uncomment if your server is build with the ngx_pagespeed module
    # This module is currently not supported.
    #pagespeed off;

    location / {
        rewrite ^ /index.php$uri;
    }

    location ~ ^/(?:build|tests|config|lib|3rdparty|templates|data)/ {
        deny all;
    }
    location ~ ^/(?:\.|autotest|occ|issue|indie|db_|console) {
        deny all;
    }

    location ~ ^/(?:index|remote|public|cron|core/ajax/update|status|ocs/v[12]|updater/.+|ocs-provider/.+|core/templates/40[34])\.php(?:$|/) {
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        fastcgi_param HTTPS on;
        #Avoid sending the security headers twice
        fastcgi_param modHeadersAvailable true;
        fastcgi_param front_controller_active true;
        fastcgi_pass php-handler;
        fastcgi_intercept_errors on;
        fastcgi_request_buffering off;
    }

    location ~ ^/(?:updater|ocs-provider)(?:$|/) {
        try_files $uri/ =404;
        index index.php;
    }

    # Adding the cache control header for js and css files
    # Make sure it is BELOW the PHP block
    location ~* \.(?:css|js|woff|svg|gif)$ {
        try_files $uri /index.php$uri$is_args$args;
        add_header Cache-Control "public, max-age=7200";
        # Add headers to serve security related headers (It is intended to
        # have those duplicated to the ones above)
        # Before enabling Strict-Transport-Security headers please read into
        # this topic first.
        # add_header Strict-Transport-Security "max-age=15768000;
        #  includeSubDomains; preload;";
        add_header X-Content-Type-Options nosniff;
        add_header X-Frame-Options "SAMEORIGIN";
        add_header X-XSS-Protection "1; mode=block";
        add_header X-Robots-Tag none;
        add_header X-Download-Options noopen;
        add_header X-Permitted-Cross-Domain-Policies none;
        # Optional: Don't log access to assets
        access_log off;
    }

    location ~* \.(?:png|html|ttf|ico|jpg|jpeg)$ {
        try_files $uri /index.php$uri$is_args$args;
        # Optional: Don't log access to other assets
        access_log off;
    }
    
    # Custom config
    ${custom_config}

}
EOF
    fi
    #if [ ! -f "$__object/parameter/ssl-no-redirect" ]; then
    #    if [ -f "$__object/parameter/ssl-custom-redirect" ]; then
    #        ssl_redirect_host=$(cat "$__object/parameter/ssl-custom-redirect")
    #    else
    #        ssl_redirect_host='$host'
    #    fi

    #    ssl_redirect_file="$__object/files/nginx-redirect-http-to-https"
    #    echo "    rewrite ^ https://$ssl_redirect_host\$request_uri? permanent;" > "$ssl_redirect_file"
    #    ssl_redirect_file_content=$(cat $ssl_redirect_file)
    #fi
#else
#    ssl_redirect_file=""
fi


## Postgres
require="__package/postgresql" __postgres_role "${db_user}" --password "${db_pass}"\
                                                            --login --createdb 
                                                         
require="__package/postgresql __postgres_role/${db_user}" __postgres_database "${db_name}"\
                                                          --owner "${db_user}" --state present


# Start on boot 
require="__package/postgresql" __start_on_boot postgresql
require="__package/nginx" __start_on_boot nginx
require="__package/php7.0-fpm" __start_on_boot php7.0-fpm