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-rw-r--r--util.go103
1 files changed, 103 insertions, 0 deletions
diff --git a/util.go b/util.go
new file mode 100644
index 0000000..30f9681
--- /dev/null
+++ b/util.go
@@ -0,0 +1,103 @@
+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
+ }
+ log.Printf("Consul key %s does not end with attribute=something", key)
+ panic("TODO don't panic handle this")
+}
+
+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 {
+ log.Printf("(parseConsulResult) %s %s", kv.Key, string(kv.Value))
+ 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
+}