programs to sync book library and send email notifications

lawipac.com/usr/local/bin/mysyncbook.sh

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+#!/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 | awk 'NR>1 {printf "<li>%d:%s</li>\n\n", $1,$2 } '`
+
+#use cat to test locally 
+#cat << EOF  
+
+#send email using ssmtp
+/usr/sbin/ssmtp sp@lawipac.com << EOF
+Subject: 新书通知：Calibre Books updated
+From: 成长书库 <calibre-mailer-no-reply@lawipac.com>
+To: sp@lawipac.com
+MIME-Version:1.0
+Content-type: text/html; charset=utf-8
+
+<p align=center></u> 最近（昨天，今天）新增图书: </u> </p>
+
+<ul>
+$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