#!/bin/bash

set -e

APPROOT=/var/www/answerhub
BKPSUF=$(date +%Y-%m-%d:%H:%M)
PERM="tomcat:tomcat"
STOPCMD="systemctl stop tomcat"
STARTCMD="systemctl restart tomcat"

NEXTREL="$1"

[ -d "$NEXTREL" -a -d "$NEXTREL/teamhub.war" -a -d "$NEXTREL/teamhub.home" ] || {
    echo "Usage: $0 <new release folder>" >&2
    exit 0
}

# In most cases, upgrading your AnswerHub installation is relatively easy.
# Simply follow the steps below and after restarting your application server,
# AnswerHub will run any additional upgrade tasks that are required and then
# your new version will be ready to run.

# 1. Stop your running application server
echo $STOPCMD
$STOPCMD

# 2. Make a backup of your existing teamhub.war and teamhub.home folders
THUBWAR=$APPROOT/teamhub.war
[ -d "$THUBWAR" ] && {
    echo mv $THUBWAR{,-$BKPSUF}
    mv $THUBWAR{,-$BKPSUF}
}

THUBHOME=$APPROOT/teamhub.home
[ -d "$THUBHOME" ] && {
    echo mv $THUBHOME{,-$BKPSUF}
    mv $THUBHOME{,-$BKPSUF}
}

# Replace your existing teamhub.war folder with the teamhub.war from the new release
echo cp -a $NEXTREL/teamhub.war $APPROOT/
cp -a $NEXTREL/teamhub.war $APPROOT/

# Migrate your teamhub.war/WEB-INF/classes/META-INF/config.properties to the new
# directory
echo cat $THUBWAR-$BKPSUF/WEB-INF/classes/META-INF/config.properties > $THUBWAR/WEB-INF/classes/META-INF/config.properties
cat $THUBWAR-$BKPSUF/WEB-INF/classes/META-INF/config.properties > $THUBWAR/WEB-INF/classes/META-INF/config.properties

# Replace your existing teamhub.home folder with the teamhub.home from the new
# release
echo cp -a $NEXTREL/teamhub.home $APPROOT/
cp -a $NEXTREL/teamhub.home $APPROOT/

# Copy any custom themes and plugins to the teamhub.home/themes folder and the
# teamhub.home/plugins/installed folder.
[ -d themes ] && {
    echo mkdir -p $THUBHOME/themes/
    mkdir -p $THUBHOME/themes/
    echo rsync -rcav themes/ $THUBHOME/themes/
    rsync -rcav themes/ $THUBHOME/themes/
}

[ -d plugins/installed ] && {
    echo mkdir -p $THUBHOME/plugins/installed
    mkdir -p $THUBHOME/plugins/installed
    echo rsync -rcav plugins/ $THUBHOME/plugins/
    rsync -rcav plugins/ $THUBHOME/plugins/
}

# Copy any files from your old teamhub.home/sites folder to the new
# teamhub.home/sites folder.
[ -d $THUBHOME/sites ] && {
    echo rm -rf $THUBHOME/sites
    rm -rf $THUBHOME/sites
    echo mkdir -p $THUBHOME/sites
    mkdir -p $THUBHOME/sites
}
echo rsync -rcav $THUBHOME-$BKPSUF/sites/ $THUBHOME/sites/
rsync -rcav $THUBHOME-$BKPSUF/sites/ $THUBHOME/sites/

# Finally, verify that the folders in the new teamhub.home are owned by the user
# running your application server.
echo chown -R $PERM $APPROOT/
chown -R $PERM $APPROOT/

# After these steps, restart your application server and the new AnswerHub should
# load. If your new version does not start, please double-check that you followed
# all the steps outlined above and then contact your support representative for
# help with the upgrade.
echo $STARTCMD
$STARTCMD