#!/bin/bash
#
# Get currency exchanges rate and update a ledger price file.
#

set -e

LEDGER="$HOME/.ledgerrc"
if [[ ! -f "$LEDGER" ]] ; then
    echo "No ledger configuration file: $LEDGER" >&2
    exit 13
fi
PRICE_DB_FILE=$(sed -nE "s/^--price-db (.*)/\1/p" "$LEDGER")
PRICE_DB_FILE="${PRICE_DB_FILE/#\~/$HOME}"

xe() {
    curl -s "http://download.finance.yahoo.com/d/quotes.csv?s=$1&f=p"
}

echo P $(date +"%Y/%m/%d %H:%M:%S") \$ $(xe "USDRUB=X") R >> "$PRICE_DB_FILE"
echo P $(date +"%Y/%m/%d %H:%M:%S") €  $(xe "EURRUB=X") R >> "$PRICE_DB_FILE"