#!/bin/bash

if (( $# < 2)); then
	echo "OpenHIM API: Curl wrapper that sets up the appropriate OpenHIM authentication headers";
	echo "Usage: $0 USERNAME PASSWORD [CURL_ARGS...]";
	exit 0;
fi

username=$1;
pass=$2;
shift;
shift;

# which server?
server=""
for arg in $@; do
    match=`echo $arg | grep http | perl -pe 's|(https?://.*?)/.*|\1|'`;
    if [ "$match" ]; then
        server=$match;
    fi
done

if [ ! "$server" ]; then
    echo "OpenHIM server not specified";
    exit 0;
fi

auth=`curl -k -s $server/authenticate/$username`;
salt=`echo $auth | perl -pe 's|.*"salt":"(.*?)".*|\1|'`;
ts=`echo $auth | perl -pe 's|.*"ts":"(.*?)".*|\1|'`;

passhash=`echo -n "$salt$pass" | shasum -a 512 | awk '{print $1}'`;
token=`echo -n "$passhash$salt$ts" | shasum -a 512 | awk '{print $1}'`;

curl -k -H "auth-username: $username" -H "auth-ts: $ts" -H "auth-salt: $salt" -H "auth-token: $token" $@;
echo "";