This is the Node.js backend for HospitalRun. The intention is that this would be used in HospitalRun production deployments. Having a Node.js backend server allows us to do the following:

1. Use Google OAuth for user authentication.
2. Provide a proxy for CouchDB.
3. Integrate with ElasticSearch for better search capability.
4. The capability to define CouchDB database listeners that react to changes in the database. At present, there are 3 database listeners, located in the dblisteners directory:

• file-upload - Uploads patient images to the server
• lookup-import - Utility to import lookup lists from the frontend.
• merge-conflicts - Checks for couchdb conflicts and resolves using a strategy of accepting the last change at a field level.

##Installation

1. Run npm install to install the HospitalRun dependencies
2. In the server directory copy config-example.js to config.js and configure db passwords etc in config.js
3. If you are on Linux distribution that uses Upstart, there is an upstart script in utils/hospitalrun.conf. By default this script assumes the server is installed at /var/app/server. This script relies on forever which you will need to install via npm: npm install -g forever
   • alternatively you can run server using npm's scripts npm start (this is not recommended for production usage).
4. Search on the HospitalRun Server uses elasticsearch. You will also need the CouchDB River Plugin for Elasticsearch and the JavaScript language Plugin for elasticsearch. If you are installing on a debian server you can use the following steps to setup elasticsearch and java (if needed):

wget -qO - https://packages.elasticsearch.org/GPG-KEY-elasticsearch | sudo apt-key add -
echo "deb http:https://packages.elastic.co/elasticsearch/1.4/debian stable main" | sudo tee -a /etc/apt/sources.list
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer elasticsearch
sudo update-rc.d elasticsearch defaults 95 10
cd /usr/share/elasticsearch/
sudo bin/plugin install elasticsearch/elasticsearch-river-couchdb/2.4.2
sudo bin/plugin -install elasticsearch/elasticsearch-lang-javascript/2.4.1

6. Add the following line to /etc/elasticsearch/elasticsearch.yml (or wherever your elasticsearch configuration is located):

script.disable_dynamic: false

7. Start elasticsearch. On debian/ubuntu: service elasticsearch start
8. Run the setup script for linking couchdb to elasticsearch. You will need to specify the username and password for the hospitalrun admin account you created with initcouch.sh in HospitalRun/frontend:

/utils/elasticsearch.sh hradmin password

##Inventory Import There is a utility located under utils/inv-import.js that will allow you to import inventory from a CSV. To use it, run the following command node utils/inv-import.js file.csv YYYY-MM-DD, eg node utils/inv-import.js file.csv 2015-12-31

The date specified will be used as the date that the purchases were received.

The csv fields that are supported are as follows:

• aisleLocation (optional) - if item is in a particular aisle in a location, specify that name here.
• distributionUnit (optional) - the unit type used when this item is distributed in the hospital. You can see the valid values in the app at Admin/Lookup Lists/Unit Types. If there is a distribution unit you use that is not in the list, you can add it on this screen.
• expirationDate (optional) - format is MM/DD/YYYY
• giftInKind (optional) - value should be Yes if item is gift in kind
• location(optional) - Location of item
• lotNumber (optional) - Lot number of item
• name (required) - Display name of item
• purchaseCost (required) - Total purchase cost for the items. This would be the cost per unit x the quantity. The purchase cost is used with the quantity to determine the cost per unit.
• quantity (required) - Number of items.
• type - use Medication for medicine; other types can be specified, but they should be added in the interface through Admin/Lookup Lists/Inventory Types
• vendor (optional) - Name of vendor who supplied item
• vendorItemNo (optional) - Vendor item number

The first row of the csv file needs to have the columnName as specified above so that the import tool knows which value is in which column.