#!/bin/bash

#=================================================
# COMMON VARIABLES
#=================================================
RUBY_VERSION="2.7.2"

# dependencies used by the app
pkg_dependencies="\
    zlib1g-dev \
    libsqlite3-dev \
    default-libmysqlclient-dev \
    libssl-dev \
    libreadline-dev \
    libjemalloc-dev"

#=================================================
# PERSONAL HELPERS
#=================================================

# Execute a command as another user with login
# (hence in user home dir, with prior loading of .profile, etc.)
# usage: exec_login_as USER COMMAND [ARG ...]
exec_login_as() {
    local user=$1
    shift 1
    exec_as $user --login "$@"
}
# Execute a command as another user
# usage: exec_as USER COMMAND [ARG ...]
exec_as() {
    local user=$1
    shift 1

    if [[ $user = $(whoami) ]]; then
        eval "$@"
    else
        sudo -u "$user" "$@"
    fi
}

#================================================
# EXPERIMENTAL HELPERS
#=================================================

# Send an email to inform the administrator
#
# usage: ynh_send_readme_to_admin --app_message=app_message [--recipients=recipients] [--type=type]
# | arg: -m --app_message= - The file with the content to send to the administrator.
# | arg: -r, --recipients= - The recipients of this email. Use spaces to separate multiples recipients. - default: root
#	example: "root admin@domain"
#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
#	example: "root admin@domain user1 user2"
# | arg: -t, --type= - Type of mail, could be 'backup', 'change_url', 'install', 'remove', 'restore', 'upgrade'
ynh_send_readme_to_admin() {
	# Declare an array to define the options of this helper.
	declare -Ar args_array=( [m]=app_message= [r]=recipients= [t]=type= )
	local app_message
	local recipients
	local type
	# Manage arguments with getopts

	ynh_handle_getopts_args "$@"
	app_message="${app_message:-}"
	recipients="${recipients:-root}"
	type="${type:-install}"

	# Get the value of admin_mail_html
	admin_mail_html=$(ynh_app_setting_get $app admin_mail_html)
	admin_mail_html="${admin_mail_html:-0}"

	# Retrieve the email of users
	find_mails () {
		local list_mails="$1"
		local mail
		local recipients=" "
		# Read each mail in argument
		for mail in $list_mails
		do
			# Keep root or a real email address as it is
			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
			then
				recipients="$recipients $mail"
			else
				# But replace an user name without a domain after by its email
				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
				then
					recipients="$recipients $mail"
				fi
			fi
		done
		echo "$recipients"
	}
	recipients=$(find_mails "$recipients")

	# Subject base
	local mail_subject="☁️🆈🅽🅷☁️: \`$app\`"

	# Adapt the subject according to the type of mail required.
	if [ "$type" = "backup" ]; then
		mail_subject="$mail_subject has just been backup."
	elif [ "$type" = "change_url" ]; then
		mail_subject="$mail_subject has just been moved to a new URL!"
	elif [ "$type" = "remove" ]; then
		mail_subject="$mail_subject has just been removed!"
	elif [ "$type" = "restore" ]; then
		mail_subject="$mail_subject has just been restored!"
	elif [ "$type" = "upgrade" ]; then
		mail_subject="$mail_subject has just been upgraded!"
	else	# install
		mail_subject="$mail_subject has just been installed!"
	fi

	local mail_message="This is an automated message from your beloved YunoHost server.

Specific information for the application $app.

$(if [ -n "$app_message" ]
then
	cat "$app_message"
else
	echo "...No specific information..."
fi)

---
Automatic diagnosis data from YunoHost

__PRE_TAG1__$(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')__PRE_TAG2__"

	# Store the message into a file for further modifications.
	echo "$mail_message" > mail_to_send

	# If a html email is required. Apply html tags to the message.
 	if [ "$admin_mail_html" -eq 1 ]
 	then
		# Insert 'br' tags at each ending of lines.
		ynh_replace_string "$" "<br>" mail_to_send

		# Insert starting HTML tags
		sed --in-place '1s@^@<!DOCTYPE html>\n<html>\n<head></head>\n<body>\n@' mail_to_send

		# Keep tabulations
		ynh_replace_string "  " "\&#160;\&#160;" mail_to_send
		ynh_replace_string "\t" "\&#160;\&#160;" mail_to_send

		# Insert url links tags
		ynh_replace_string "__URL_TAG1__\(.*\)__URL_TAG2__\(.*\)__URL_TAG3__" "<a href=\"\2\">\1</a>" mail_to_send

		# Insert pre tags
		ynh_replace_string "__PRE_TAG1__" "<pre>" mail_to_send
		ynh_replace_string "__PRE_TAG2__" "<\pre>" mail_to_send

		# Insert finishing HTML tags
		echo -e "\n</body>\n</html>" >> mail_to_send

	# Otherwise, remove tags to keep a plain text.
	else
		# Remove URL tags
		ynh_replace_string "__URL_TAG[1,3]__" "" mail_to_send
		ynh_replace_string "__URL_TAG2__" ": " mail_to_send

		# Remove PRE tags
		ynh_replace_string "__PRE_TAG[1-2]__" "" mail_to_send
	fi

	# Define binary to use for mail command
	if [ -e /usr/bin/bsd-mailx ]
	then
		local mail_bin=/usr/bin/bsd-mailx
	else
		local mail_bin=/usr/bin/mail.mailutils
	fi

	if [ "$admin_mail_html" -eq 1 ]
	then
		content_type="text/html"
	else
		content_type="text/plain"
	fi

	# Send the email to the recipients
	cat mail_to_send | $mail_bin -a "Content-Type: $content_type; charset=UTF-8" -s "$mail_subject" "$recipients"
}

#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================