#!/usr/bin/env bash

set -euo pipefail

# Reads stdin or the file $1, replacing hashes with block info
#
# Uses zebrad-hash-lookup, which uses zcash-cli.
#
# Usage:
#   zebrad start | zebrad-log-filter
#   ZCASH_CLI="zcash-cli -testnet" zebrad start | zebrad-log-filter

# Find GNU sed
if command -v gsed > /dev/null; then
    GNU_SED=${GNU_SED:-gsed}
else
    # Just assume it's GNU sed
    GNU_SED=${GNU_SED:-sed}
fi

while read line; do
    # Put each hash on a separate line, then expand them
    echo "$line" | \
        $GNU_SED -r \
            's/([0-9a-f]{64})/\n\1/g' | \
        $GNU_SED -r \
            's/(.*)([0-9a-f]{64})(.*)/ \
                echo -n '\''\1'\''; \
                echo '\''\2'\'' | zebrad-hash-lookup; \
                echo -n '\''\3'\''; /e'
done < "${1:-/dev/stdin}"