cmd: use type safe method of removing config field

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>

core/commands/config.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"strings"
@@ -144,48 +143,26 @@ included in the output of this command.
 	},
 
 	Run: func(req cmds.Request, res cmds.Response) {
-		fname, err := config.Filename(req.InvocContext().ConfigRoot)
+		oConf, err := req.InvocContext().GetConfig()
 		if err != nil {
 			res.SetError(err, cmds.ErrNormal)
 			return
 		}
 
-		data, err := ioutil.ReadFile(fname)
+		// make copy of a current config
+		cMap, err := config.ToMap(oConf)
 		if err != nil {
 			res.SetError(err, cmds.ErrNormal)
 			return
 		}
-
-		var cfg map[string]interface{}
-		err = json.Unmarshal(data, &cfg)
+		copyConfig, err := config.FromMap(cMap)
 		if err != nil {
 			res.SetError(err, cmds.ErrNormal)
 			return
 		}
+		copyConfig.Identity.PrivKey = ""
 
-		idmap, ok := cfg["Identity"].(map[string]interface{})
-		if !ok {
-			res.SetError(errors.New("config has no identity"), cmds.ErrNormal)
-			return
-		}
-
-		privKeyKey := "" // make sure we both find the name of privkey and we delete it
-		for key, _ := range idmap {
-			if strings.ToLower(key) == "privkey" {
-				if privKeyKey != "" {
-					res.SetError(errors.New("found multiple PrivKey keys"), cmds.ErrNormal)
-					return
-				}
-				privKeyKey = key
-			}
-		}
-		if privKeyKey == "" {
-			res.SetError(errors.New("haven't found PriveKey key"), cmds.ErrNormal)
-		}
-
-		delete(idmap, privKeyKey)
-
-		output, err := config.HumanOutput(cfg)
+		output, err := config.HumanOutput(copyConfig)
 		if err != nil {
 			res.SetError(err, cmds.ErrNormal)
 			return