#!/bin/bash

current_version="2.17.1"

ynh_check_global_uwsgi_config () {
	uwsgi --version || ynh_die "You need to add uwsgi (and appropriate plugin) as a dependency"

	if [ -f /etc/systemd/system/uwsgi-app@.service ];
	then
		echo "Uwsgi generic file is already installed"
	else
		cp ../conf/uwsgi-app@.socket /etc/systemd/system/uwsgi-app@.socket
		cp ../conf/uwsgi-app@.service /etc/systemd/system/uwsgi-app@.service
	fi

	# make sure the folder for sockets exists and set authorizations
	mkdir -p /var/run/uwsgi/
	chown root:www-data /var/run/uwsgi/
	chmod -R 775 /var/run/uwsgi/

	# make sure the folder for logs exists and set authorizations
	mkdir -p /var/log/uwsgi/app/
	chown root:www-data /var/log/uwsgi/app/
	chmod -R 775 /var/log/uwsgi/app/
}

# Create a dedicated uwsgi ini file to use with generic uwsgi service
# It will install generic uwsgi.socket and
#
# This will use a template in ../conf/uwsgi.ini
# and will replace the following keywords with
# global variables that should be defined before calling
# this helper :
#
#   __APP__       by  $app
#   __FINALPATH__ by  $final_path
#
# usage: ynh_add_systemd_config
ynh_add_uwsgi_service () {
	ynh_check_global_uwsgi_config

	# www-data group is needed since it is this nginx who will start the service
	usermod --append --groups www-data "$app" || ynh_die "It wasn't possible to add user $app to group www-data"

	finaluwsgiini="/etc/uwsgi/apps-available/$app.ini"
	ynh_backup_if_checksum_is_different "$finaluwsgiini"
	cp ../conf/uwsgi.ini "$finaluwsgiini"

	# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
	# Substitute in a nginx config file only if the variable is not empty
	if test -n "${final_path:-}"; then
		ynh_replace_string "__FINALPATH__" "$final_path" "$finaluwsgiini"
	fi
	if test -n "${app:-}"; then
		ynh_replace_string "__APP__" "$app" "$finaluwsgiini"
	fi
	ynh_store_file_checksum "$finaluwsgiini"

	chown root: "$finaluwsgiini"
	systemctl enable "uwsgi-app@$app.socket"
	systemctl start "uwsgi-app@$app.socket"
	systemctl daemon-reload

	# Add as a service
	yunohost service add "uwsgi-app@$app.socket" --log "/var/log/uwsgi/app/$app"
}

# Remove the dedicated uwsgi ini file
#
# usage: ynh_remove_systemd_config
ynh_remove_uwsgi_service () {
	finaluwsgiini="/etc/uwsgi/apps-available/$app.ini"
	if [ -e "$finaluwsgiini" ]; then
		systemctl stop "uwsgi-app@$app.socket"
		systemctl disable "uwsgi-app@$app.socket"
		yunohost service remove "uwsgi-app@$app.socket"

		ynh_secure_remove "$finaluwsgiini"
	fi
}


weblate_fill_settings() {
	settings="$1"

	ynh_replace_string "__NAME__"       "$app"            "$settings"
	ynh_replace_string "__DB_PWD__"     "$db_pwd"         "$settings"
	ynh_replace_string "__ADMIN__"      "$admin"          "$settings"
	ynh_replace_string "__ADMINMAIL__"  "$admin_mail"     "$settings"
	ynh_replace_string "__DOMAIN__"     "$domain"         "$settings"
	ynh_replace_string "__KEY__"        "$key"            "$settings"
	ynh_replace_string "__FINALPATH__"  "$final_path"     "$settings"
	ynh_replace_string "__MEMCPORT__"   "$memc_port"      "$settings"
	ynh_replace_string "__GITHUBUSER__" "$github_account" "$settings"

	# root install as an empty PATHURL to prevent '//static'
	if [ "$path_url" == "/" ]
	then
		ynh_replace_string "__PATHURL__" "" "$settings"
	else
		ynh_replace_string "__PATHURL__" "$path_url" "$settings"
	fi
}

ynh_check_if_checksum_is_different() {
	local file=$1
	local checksum_setting_name=checksum_${file//[\/ ]/_}	# Replace all '/' and ' ' by '_'
	local checksum_value=$(ynh_app_setting_get $app $checksum_setting_name)
	local check=0

	if ! echo "$checksum_value $file" | md5sum -c --status
	then	# If the checksum is now different
		check=1
	fi

	echo "$check"
}

ynh_psql_test_if_first_run() {
	if [ -f /etc/yunohost/psql ];
	then
		echo "PostgreSQL is already installed, no need to create master password"
	else
		pgsql=$(ynh_string_random)
		echo "$pgsql" >> /etc/yunohost/psql
		systemctl start postgresql
                su --command="psql -c\"ALTER user postgres WITH PASSWORD '${pgsql}'\"" postgres
		# we can't use peer since YunoHost create users with nologin
		sed -i '/local\s*all\s*all\s*peer/i \
		local all all password' /etc/postgresql/9.4/main/pg_hba.conf
		systemctl enable postgresql
		systemctl reload postgresql
	fi
}

# Open a connection as a user
#
# example: ynh_psql_connect_as 'user' 'pass' <<< "UPDATE ...;"
# example: ynh_psql_connect_as 'user' 'pass' < /path/to/file.sql
#
# usage: ynh_psql_connect_as user pwd [db]
# | arg: user - the user name to connect as
# | arg: pwd - the user password
# | arg: db - the database to connect to
ynh_psql_connect_as() {
	user="$1"
	pwd="$2"
	db="$3"
	su --command="PGUSER=\"${user}\" PGPASSWORD=\"${pwd}\" psql \"${db}\"" postgres
}

# # Execute a command as root user
#
# usage: ynh_psql_execute_as_root sql [db]
# | arg: sql - the SQL command to execute
# | arg: db - the database to connect to
ynh_psql_execute_as_root () {
	sql="$1"
	su --command="psql" postgres <<< "$sql"
}

# Execute a command from a file as root user
#
# usage: ynh_psql_execute_file_as_root file [db]
# | arg: file - the file containing SQL commands
# | arg: db - the database to connect to
ynh_psql_execute_file_as_root() {
	file="$1"
	db="$2"
	su -c "psql $db" postgres < "$file"
}

# Create a database, an user and its password. Then store the password in the app's config
#
# After executing this helper, the password of the created database will be available in $db_pwd
# It will also be stored as "psqlpwd" into the app settings.
#
# usage: ynh_psql_setup_db user name [pwd]
# | arg: user - Owner of the database
# | arg: name - Name of the database
# | arg: pwd - Password of the database. If not given, a password will be generated
ynh_psql_setup_db () {
	db_user="$1"
	app="$1"
	db_name="$2"
	new_db_pwd=$(ynh_string_random)	# Generate a random password
	# If $3 is not given, use new_db_pwd instead for db_pwd.
	db_pwd="${3:-$new_db_pwd}"
	ynh_psql_create_db "$db_name" "$db_user" "$db_pwd"	# Create the database
	ynh_app_setting_set "$app" psqlpwd "$db_pwd"	# Store the password in the app's config
}

# Create a database and grant optionnaly privilegies to a user
#
# usage: ynh_psql_create_db db [user [pwd]]
# | arg: db - the database name to create
# | arg: user - the user to grant privilegies
# | arg: pwd  - the user password
ynh_psql_create_db() {
	db="$1"
	user="$2"
	pwd="$3"
	ynh_psql_create_user "$user" "$pwd"
	su --command="createdb --owner=\"${user}\" \"${db}\"" postgres
}

# Drop a database
#
# usage: ynh_psql_drop_db db
# | arg: db - the database name to drop
# | arg: user - the user to drop
ynh_psql_remove_db() {
	db="$1"
	user="$2"
	su --command="dropdb \"${db}\"" postgres
	ynh_psql_drop_user "${user}"
}

# Dump a database
#
# example: ynh_psql_dump_db 'roundcube' > ./dump.sql
#
# usage: ynh_psql_dump_db db
# | arg: db - the database name to dump
# | ret: the psqldump output
ynh_psql_dump_db() {
	db="$1"
	su --command="pg_dump \"${db}\"" postgres
}


# Create a user
#
# usage: ynh_psql_create_user user pwd [host]
# | arg: user - the user name to create
ynh_psql_create_user() {
	user="$1"
	pwd="$2"
        su --command="psql -c\"CREATE USER ${user} WITH PASSWORD '${pwd}'\"" postgres
}

# Drop a user
#
# usage: ynh_psql_drop_user user
# | arg: user - the user name to drop
ynh_psql_drop_user() {
	user="$1"
	su --command="dropuser \"${user}\"" postgres
}