#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
	sleep 60
fi

# Load common variables for all scripts.
source _variables
source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE FAILURE OF THE SCRIPT
#=================================================

ynh_clean_setup () {
# Clean installation remainings that are not handled by the remove script.
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
ynh_print_OFF; password=$YNH_APP_ARG_PASSWORD; ynh_print_ON
language=$YNH_APP_ARG_LANGUAGE
is_public=$YNH_APP_ARG_IS_PUBLIC
export=$YNH_APP_ARG_EXPORT
mypads=$YNH_APP_ARG_MYPADS
useldap=$YNH_APP_ARG_USELDAP

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THIS ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

ynh_print_OFF
if [ "${#password}" -lt 8 ] || [ "${#password}" -gt 30 ]
then
	ynh_die --message="The password must be between 8 and 30 characters."
fi
ynh_print_ON

final_path=/var/www/$app
test ! -e "$final_path" || ynh_die "This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..." --weight=3

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin
ynh_print_OFF; ynh_app_setting_set --app=$app --key=password --value=$password; ynh_print_ON
ynh_app_setting_set --app=$app --key=language --value=$language
ynh_app_setting_set --app=$app --key=export --value=$export
ynh_app_setting_set --app=$app --key=mypads --value=$mypads
ynh_app_setting_set --app=$app --key=useldap --value=$useldap
ynh_app_setting_set --app=$app --key=overwrite_settings --value="1"
ynh_app_setting_set --app=$app --key=overwrite_credentials --value="1"
ynh_app_setting_set --app=$app --key=overwrite_nginx --value="1"
ynh_app_setting_set --app=$app --key=overwrite_systemd --value="1"

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding an available port..." --weight=2

# Find a free port
port=$(ynh_find_port --port=9001)
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=120

if [ "$export" = "abiword" ]; then
	ynh_exec_warn_less ynh_install_app_dependencies $abiword_app_depencencies
elif [ "$export" = "libreoffice" ]; then
	ynh_exec_warn_less ynh_install_app_dependencies $libreoffice_app_dependencies
fi

#=================================================
# INSTALL NODEJS
#=================================================
ynh_script_progression --message="Installing NodeJS..." --weight=12

ynh_install_nodejs --nodejs_version=$nodejs_version

#=================================================
# CREATE A MYSQL DATABASE
#=================================================
ynh_script_progression --message="Creating a MySQL database..."

db_name=$(ynh_sanitize_dbid --db_name=$app)
db_user=$db_name
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_mysql_setup_db --db_user=$db_name --db_name=$db_name

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=3

# Create a dedicated system user
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=4

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC SETUP
#=================================================
# HANDLE LOG FILES AND LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..."

# Create log directory
mkdir -p /var/log/$app
touch /var/log/$app/etherpad.log
install_log=/var/log/$app/installation.log
touch $install_log
chown $app -R /var/log/$app

# Setup logrotate
ynh_use_logrotate --specific_user=$app/$app

#=================================================
# INSTALL ETHERPAD
#=================================================
ynh_script_progression --message="Installing Etherpad..." --weight=90

chown -R $app: $final_path
pushd $final_path
 	ynh_use_nodejs
 	ynh_exec_as $app env "$ynh_node_load_PATH" bin/installDeps.sh
popd

#=================================================
# CONFIGURE ETHERPAD
#=================================================
ynh_script_progression --message="Configuring Etherpad..." --weight=6

cp ../conf/settings.json "$final_path/settings.json"

ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/settings.json"
if [ "$export" = "abiword" ]
then
	# Get Abiword binary path
	abiword_path=`which abiword`
	# Set the path of abiword into Etherpad config
	ynh_replace_string --match_string="\"abiword\" : null" --replace_string="\"abiword\" : \"$abiword_path\"" --target_file="$final_path/settings.json"
elif [ "$export" = "libreoffice" ]
then
	# Get soffice binary path
	soffice_path=`which soffice`
	# Set the path of soffice into Etherpad config
	ynh_replace_string --match_string="\"soffice\" : null" --replace_string="\"soffice\" : \"$soffice_path\"" --target_file="$final_path/settings.json"
fi
ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$final_path/settings.json"

# Use ldap for mypads
if [ $mypads -eq 1 ] && [ $useldap -eq 1 ]
then
	ynh_replace_string --match_string="//noldap\(.*\)" --replace_string="\1 //useldap" --target_file="$final_path/settings.json"
fi

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$final_path/settings.json"

ynh_add_config --template="../conf/credentials.json" --destination="$final_path/credentials.json"

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

# Set files ownership to etherpad
chown -R $app:$app $final_path
chmod o-rwx $final_path
# Restrict access to credentials.json
chmod 600 $final_path/credentials.json

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=4

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="ynh_node_load_PATH"

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add $app --description="Collaborative editor" --log="/var/log/$app/etherpad.log" 

#=================================================
# INSTALL FRAMAPAD'S PLUGINS
#=================================================
ynh_script_progression --message="Installing Etherpad plugins..." --weight=90

pushd "$final_path"
# Add Left/Center/Right/Justify to lines of text in a pad
ynh_npm install ep_align@${ep_align_version} >> $install_log 2>&1
# Framapad - Adds author names to span titles
ynh_npm install ep_author_hover@${ep_author_hover_version} >> $install_log 2>&1
# Automatically disconnects user after some period of time (Prevent server overload)
ynh_npm install ep_automatic_logut@${ep_automatic_logut_version} >> $install_log 2>&1
# Framapad - Adds comments on sidebar and link it to the text.
ynh_npm install ep_comments_page@${ep_comments_page_version} >> $install_log 2>&1
# Framapad - Displays paragraphs, sentences, words and characters counts.
ynh_npm install ep_countable@${ep_countable_version} >> $install_log 2>&1
# Framapad - Delete pads which were never edited
ynh_npm install ep_delete_empty_pads@${ep_delete_empty_pads_version} >> $install_log 2>&1
# Framapad - Apply colors to fonts
ynh_npm install ep_font_color@${ep_font_color_version} >> $install_log 2>&1
# Framapad - Adds heading support to Etherpad Lite.
ynh_npm install ep_headings2@${ep_headings2_version} >> $install_log 2>&1
# Framapad - Edit and Export as Markdown in Etherpad
ynh_npm install ep_markdown@${ep_markdown_version} >> $install_log 2>&1
if [ $mypads -eq 1 ]; then
	# Framapad - Groups and private pads for Etherpad
	ynh_npm install ep_mypads@${mypads_version} >> $install_log 2>&1
fi
# Framapad - Add support to do 'Spell checking'
ynh_npm install ep_spellcheck@${ep_spellcheck_version} >> $install_log 2>&1
# Framapad - Add support for Subscript and Superscript
ynh_npm install ep_subscript_and_superscript@${ep_subscript_and_superscript_version} >> $install_log 2>&1
# Framapad - View a table of contents for your pad
ynh_npm install ep_table_of_contents@${ep_table_of_contents_version} >> $install_log 2>&1
# Framapad - User Pad Contents font size can be set in settings, this does not effect other peoples views
ynh_npm install ep_font_size@${ep_font_size_version} >> $install_log 2>&1
popd
chown -R $app: $final_path/node_modules

#=================================================
# SOME HACKS
#=================================================

if [ $mypads -eq 1 ]
then
	# Add a link to Etherpad to allow anonymous pads creation from MyPads.
	ynh_replace_string --match_string="^ *\"DESCRIPTION\": .*</ul>" --replace_string="&<a href=../>Pads anonymes</a>" --target_file=$final_path/node_modules/ep_mypads/static/l10n/fr.json
	ynh_replace_string --match_string="^ *\"DESCRIPTION\": .*</ul>" --replace_string="&<a href=../>Anonymous pads</a>" --target_file=$final_path/node_modules/ep_mypads/static/l10n/en.json
	# And a link to etherpad admin from Mypads.
	ynh_replace_string --match_string="^ *\"FOOTER\": .*2.0" --replace_string="& | <a href='../admin'>Etherpad admin</a>" --target_file=$final_path/node_modules/ep_mypads/static/l10n/en.json
	ynh_replace_string --match_string="^ *\"FOOTER\": .*2.0" --replace_string="& | <a href='../admin'>Etherpad admin</a>" --target_file=$final_path/node_modules/ep_mypads/static/l10n/fr.json

	## Find the /div just after the field to open a pad
	#mod_line=$(grep -nA5 "index.createOpenPad" $final_path/src/templates/index.html | grep "</div>" | cut -d '-' -f 1)
	## In order to add a link to MyPads plugin.
	#sed -i "$mod_line s@div>@&\n\t<center><br><font size="5"><a href="./mypads/">MyPads</a></font></center>@" $final_path/src/templates/index.html
	sed -i '157i<center><br><font size="4"><a href="./mypads/" style="text-decoration: none; color: #555">MyPads</a></font></center>' $final_path/src/templates/index.html
fi

#=================================================
# SETUP FAIL2BAN
#=================================================
ynh_script_progression --message="Configuring Fail2Ban..." --weight=13

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/nginx/$domain-access.log" --failregex="<HOST> .* .POST /mypads/api/auth/login HTTP/1.1. 400" --max_retry=5

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=2

if [ $is_public -eq 1 ]; then
	ynh_permission_update --permission="main" --add="visitors"	
fi

# Etherpad admin page doesn't support SSO...
ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --action=reload --service_name=nginx

#=================================================
# CHECK ETHERPAD STARTING
#=================================================
ynh_script_progression --message="Restarting Etherpad..." --weight=20

# Wait for etherpad to be fully started
ynh_systemd_action --action=restart --line_match="You can access your Etherpad instance at" --log_path="/var/log/$app/etherpad.log" --timeout="120"

if [ $mypads -eq 1 ]
then
	ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="../conf/lang_mypads.sql"
	mysql -u $db_name -p$db_pwd $db_name < "../conf/lang_mypads.sql"

	# Wait for etherpad to be fully started
	ynh_systemd_action --action=restart --line_match="You can access your Etherpad instance at" --log_path="/var/log/$app/etherpad.log" --timeout="120"
fi

#=================================================
# SEND A README FOR THE ADMIN
#=================================================

# Get main domain and buid the URL of the admin panel of the app.
admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"

if [ $mypads -eq 1 ]
then
	Informations="You can access two different admin panels, for Etherpad by accessing https://$domain${path_url%/}/admin and for MyPads by accessing https://$domain${path_url%/}/mypads/?/admin."
else
	Informations="You can access the admin panel by accessing https://$domain${path_url%/}/admin."
fi

ynh_print_OFF
echo "$Informations
You can also find a config file for Etherpad at this path /var/www/etherpad_mypads/settings.json.

You can configure this app easily by using the experimental config-panel feature $admin_panel/config-panel.
You can also find some specific actions for this app by using the experimental action feature $admin_panel/actions.

If you are facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/etherpad_mypads_ynh" > mail_to_send

ynh_send_readme_to_admin --app_message="mail_to_send" --recipients="$admin" --type=install
ynh_print_ON

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Installation of $app completed" --last