#!/bin/bash

function sync_library  {
	echo "stop calibre service: 'service calibre-server stop' "
	/usr/sbin/service calibre-server stop

	#echo "wait for 1 sec to make sure calibre stopped"
	#sleep 1

	#echo "force kill calibre server"
	#pkill -15 -u www-data -f "/opt/calibre/bin/calibre-server"

	echo "sync book data to  lawipac.com/var/www/MyBooks"
	rsync -ah --delete /var/www/nextcloud/data/patrick/files/MyBooks/ /var/www/MyBooks/ 

	echo "make sure www-data owns /var/www/MyBooks"
	chown www-data:www-data -R /var/www/MyBooks

	echo "check md5sum of metadb"
	CLOUD=`md5sum /var/www/nextcloud/data/patrick/files/MyBooks/metadata.db | awk '{print $1}'`
	WWW=`md5sum /var/www/MyBooks/metadata.db | awk '{print $1}'`
	echo "MD5 of Metadata.db CLOUD=$CLOUD  WWW=$WWW "
	if [  $CLOUD != $WWW ]; then
		echo "MD5 mismatched after Sync !! ERROR ==========";
		#send email to sp@lawipac.com to inform the error
		email_failed
	else 
		echo "successfully updated book library"
		email_success
	fi

	echo "service calibre-server start"
	#systemctl daemon-reload
	/usr/sbin/service calibre-server start
}

function email_failed  {

/usr/sbin/ssmtp	-F "书库同步出错" sp@lawipac.com <<EOF
Subject: Calibre Book Sync Failed
From: 同步书库出错 <mailer@lawipac.com>
To: sp@lawipac.com
MIME-Version:1.0
Content-type: text/html; charset=utf-8

<p> 经过同步之后的 MD5 不匹配 !!!; </p>

<p>  云：`md5sum /var/www/nextcloud/data/patrick/files/MyBooks/metadata.db`</p>

<p> 书库：`md5sum /var/www/MyBooks/metadata.db`</p>

<b> Please do not reply this email </b> 

Kind Regards < /br>
lawipac </br>
`date` </br>
EOF
}

function email_success {

BOOK_LIST=`calibredb list -s "date:>=1daysago" -ftitle --with-library=/var/www/MyBooks`

#use cat to test locally 
#cat << EOF  

#send email using ssmtp
/usr/sbin/ssmtp sp@lawipac.com << EOF
Subject: 新书通知：Calibre Books updated
From: 成长书库 <calibre-mailer-no-reply@lawipac.com>
To: sp@lawipac.com
MIME-Version:1.0
Content-type: text/html; charset=utf-8

<p align=center></u> 最近（昨天，今天）新增图书: </u> </p>

<ul>
$BOOK_LIST
<ul>

<h1 align=center>
<a href="https://lawipac.com/books#library_id=MyBooks&panel=book_list"> 查看书库网页版 </a>
</h1>
EOF
}

function main () {


	echo "-----------------`date` -------------------------\n";
	echo "check book library status ..."
	CLOUD=`md5sum /var/www/nextcloud/data/patrick/files/MyBooks/metadata.db | awk '{print $1}'`
	WWW=`md5sum /var/www/MyBooks/metadata.db | awk '{print $1}'`
	if [  $CLOUD != $WWW ]; then
		echo "MD5 MISMATCH update book library ..."
		sync_library
	else 
		echo "(matched) skipping update"
	fi
}

main
#email_success
#email_failed