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package main
import (
"encoding/json"
"fmt"
"log"
"strings"
consul "github.com/hashicorp/consul/api"
)
func dnToConsul(dn string) (string, error) {
if strings.Contains(dn, "/") {
return "", fmt.Errorf("DN %s contains a /", dn)
}
rdns := strings.Split(dn, ",")
// Reverse rdns
for i, j := 0, len(rdns)-1; i < j; i, j = i+1, j-1 {
rdns[i], rdns[j] = rdns[j], rdns[i]
}
return strings.Join(rdns, "/"), nil
}
func consulToDN(key string) (string, string) {
path := strings.Split(key, "/")
dn := ""
for _, cpath := range path {
if cpath == "" {
continue
}
kv := strings.Split(cpath, "=")
if len(kv) == 2 && kv[0] == "attribute" {
return dn, kv[1]
}
if dn != "" {
dn = "," + dn
}
dn = cpath + dn
}
// TODO don't panic, handle this
log.Panicf("Consul key %s does not end with attribute=something", key)
panic("unreachable")
}
func parseValue(value []byte) ([]string, error) {
val := []string{}
err := json.Unmarshal(value, &val)
if err == nil {
return val, nil
}
val2 := ""
err = json.Unmarshal(value, &val2)
if err == nil {
return []string{val2}, nil
}
return nil, fmt.Errorf("Not a string or list of strings: %s", value)
}
func parseConsulResult(data []*consul.KVPair) (map[string]Entry, error) {
aggregator := map[string]Entry{}
for _, kv := range data {
dn, attr := consulToDN(kv.Key)
if _, exists := aggregator[dn]; !exists {
aggregator[dn] = Entry{}
}
value, err := parseValue(kv.Value)
if err != nil {
return nil, err
}
aggregator[dn][attr] = value
}
return aggregator, nil
}
type DNComponent struct {
Type string
Value string
}
func parseDN(dn string) ([]DNComponent, error) {
rdns := strings.Split(dn, ",")
ret := []DNComponent{}
for _, rdn := range rdns {
splits := strings.Split(rdn, "=")
if len(splits) != 2 {
return nil, fmt.Errorf("Wrong DN component: %s (expected type=value)", rdn)
}
ret = append(ret, DNComponent{
Type: splits[0],
Value: splits[1],
})
}
return ret, nil
}
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