cmd/resolver: simplify method to handle block.d command

Instead of splitting them into three methods, merge them into single
method.

2 files changed, 54 insertions, 88 deletions

diff --git a/cmd/resolver/main.go b/cmd/resolver/main.go
index 9ffc60b..c4b9367 100644
--- a/cmd/resolver/main.go
+++ b/cmd/resolver/main.go
@@ -66,44 +66,7 @@ func main() {
 
 	switch rsol.cmd {
 	case cmdBlockd:
-		args = args[1:]
-		if len(args) == 0 {
-			log.Fatalf("resolver: %s: missing sub command", cmdBlockd)
-		}
-
-		subCmd = strings.ToLower(args[0])
-
-		switch subCmd {
-		case subCmdDisable:
-			args = args[1:]
-			if len(args) == 0 {
-				log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
-			}
-			err = rsol.blockdDisable(args[0])
-			if err != nil {
-				log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
-			}
-
-		case subCmdEnable:
-			args = args[1:]
-			if len(args) == 0 {
-				log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
-			}
-			err = rsol.blockdEnable(args[0])
-			if err != nil {
-				log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
-			}
-
-		case subCmdUpdate:
-			args = args[1:]
-			if len(args) == 0 {
-				log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
-			}
-			err = rsol.blockdUpdate(args[0])
-			if err != nil {
-				log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
-			}
-		}
+		rsol.doCmdBlockd(args[1:])
 
 	case cmdCaches:
 		args = args[1:]
diff --git a/cmd/resolver/resolver.go b/cmd/resolver/resolver.go
index 47f5e15..6998964 100644
--- a/cmd/resolver/resolver.go
+++ b/cmd/resolver/resolver.go
@@ -45,77 +45,80 @@ type resolver struct {
 	insecure bool
 }
 
-// blockdDisable disable specific hosts on block.d.
-func (rsol *resolver) blockdDisable(name string) (err error) {
+func (rsol *resolver) doCmdBlockd(args []string) {
+	if len(args) == 0 {
+		log.Fatalf("resolver: %s: missing sub command", rsol.cmd)
+	}
+
 	var (
 		resc = rsol.newRescachedClient()
 
 		hb     interface{}
 		hbjson []byte
+		subCmd string
+		err    error
 	)
 
-	hb, err = resc.BlockdDisable(name)
-	if err != nil {
-		return err
-	}
+	subCmd = strings.ToLower(args[0])
 
-	hbjson, err = json.MarshalIndent(hb, "", "  ")
-	if err != nil {
-		return err
-	}
+	switch subCmd {
+	case subCmdDisable:
+		args = args[1:]
+		if len(args) == 0 {
+			log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
+		}
 
-	fmt.Println(string(hbjson))
+		hb, err = resc.BlockdDisable(args[0])
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-	return nil
-}
+		hbjson, err = json.MarshalIndent(hb, "", "  ")
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-// blockdEnable enable specific hosts on block.d.
-func (rsol *resolver) blockdEnable(name string) (err error) {
-	var (
-		resc = rsol.newRescachedClient()
+		fmt.Println(string(hbjson))
 
-		hb     interface{}
-		hbjson []byte
-	)
+	case subCmdEnable:
+		args = args[1:]
+		if len(args) == 0 {
+			log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
+		}
 
-	hb, err = resc.BlockdEnable(name)
-	if err != nil {
-		return err
-	}
+		hb, err = resc.BlockdEnable(args[0])
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-	hbjson, err = json.MarshalIndent(hb, "", "  ")
-	if err != nil {
-		return err
-	}
+		hbjson, err = json.MarshalIndent(hb, "", "  ")
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-	fmt.Println(string(hbjson))
+		fmt.Println(string(hbjson))
 
-	return nil
-}
+	case subCmdUpdate:
+		args = args[1:]
+		if len(args) == 0 {
+			log.Fatalf("resolver: %s %s: missing argument", rsol.cmd, subCmd)
+		}
 
-// blockdUpdate fetch the latest hosts file from remote block.d URL defined by
-// its name.
-func (rsol *resolver) blockdUpdate(blockdName string) (err error) {
-	var (
-		resc = rsol.newRescachedClient()
+		hb, err = resc.BlockdUpdate(args[0])
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-		hb     interface{}
-		hbjson []byte
-	)
+		hbjson, err = json.MarshalIndent(hb, "", "  ")
+		if err != nil {
+			log.Fatalf("resolver: %s %s: %s", rsol.cmd, subCmd, err)
+		}
 
-	hb, err = resc.BlockdUpdate(blockdName)
-	if err != nil {
-		return err
-	}
+		fmt.Println(string(hbjson))
 
-	hbjson, err = json.MarshalIndent(hb, "", "  ")
-	if err != nil {
-		return err
+	default:
+		log.Fatalf("resolver: %s: unknown sub command: %s", rsol.cmd, subCmd)
 	}
-
-	fmt.Println(string(hbjson))
-
-	return nil
 }
 
 // doCmdCaches call the rescached HTTP API to fetch all caches.