#!/bin/sh

# 

records=`curl -sf http://www.iana.org/assignments/dns-parameters/dns-parameters-4.csv | cut -f1 -d',' | sort | uniq | awk '/^[A-Z][A-Z]*$/ { print $0 }'` || exit 1

echo "// AUTOGENERATED helper methods for IANA-registered RRTYPES. Do not edit."
echo "// See generate_dsl_helpers.sh for details"
echo "package dsl"
echo "
import (
	\"fmt\"
	\"regexp\"
)
"
# A list of RRTypes might come in handy, you never know
echo "var RRTypes = []string{"
for record in $records; do
echo "	\"${record}\","
done
echo "}"
for record in $records; do

echo "
// Helper function to register a callback for ${record} queries.
// The matcher is given as a string, which is compiled to a regular expression
// (using regexp.MustCompile) with the following rules:
//
// * The regexp is anchored to the start of the match string(\"^\" at start)
// * The case-insensitivity option is added \"(?i)\"
// * The regexp is anchored to the end of the match string (\"$\" at end)
//
// If any of these options are unwelcome, you can use the DSL.Register and pass
// a regexp and the \"${record}\" string directly.
func (d *DSL) ${record}(matcher string, f Callback) {
	re := regexp.MustCompile(fmt.Sprintf(\"^(?i)%s$\", matcher))
	d.Register(\"${record}\", re, f)
}"

done