#!/bin/sh

[ -z $1 ] || [ -z $2 ] && echo "Usage: $0 <username> <password>" && exit 1

if [ "$(systemctl is-active mongod)" != "active" ]; then
        echo "ERROR: mongoDB service is not running"
        exit 1  
fi


USERNAME=$1
PASSWORD=`printf $2 | sha256sum | awk '{ print $1 }'`

EXISTS=$(mongo main --quiet --eval "db.users.find({ username: '$USERNAME' })")

if [ -z "$EXISTS" ]; then
    echo "ERROR: user does not exists!"
    exit 1
fi

MODIFIED=` mongo main --quiet --eval "db.users.update({ username: '$USERNAME' }, { \\$set: { password: '$PASSWORD' } }).nModified"`

if [ $MODIFIED -eq 1 ]; then
    echo "Password changed"
else
    echo "User password not changed"
fi
