[FAB-3695] Fix endorser and orderer required check

Fix the endorser and orderer requirement checking in peer channel cmd.

* Fix the wrong flag between isOrdererRequired and isEndorserRequired.
* Add seperate isOrdererRequired flag to indicate whether we need
  orderer.
* Use typedef to help people catch the boolean flag better.

Change-Id: Ib01221d98ebb4c2c9647604b0d8c86d04769738c
Signed-off-by: Baohua Yang <baohyang@cn.ibm.com>

peer/channel/channel.go

@@ -36,6 +36,16 @@ const (
 	longDes         = "Operate a channel: create|fetch|join|list."
 )
 
+type OrdererRequirement bool
+type EndorserRequirement bool
+
+const (
+	EndorserRequired    EndorserRequirement = true
+	EndorserNotRequired EndorserRequirement = false
+	OrdererRequired     OrdererRequirement  = true
+	OrdererNotRequired  OrdererRequirement  = false
+)
+
 var (
 	// join related variables.
 	genesisBlockPath string
@@ -89,8 +99,8 @@ type ChannelCmdFactory struct {
 	BroadcastFactory BroadcastClientFactory
 }
 
-// InitCmdFactory init the ChannelCmdFactor with default clients
-func InitCmdFactory(isOrdererRequired bool) (*ChannelCmdFactory, error) {
+// InitCmdFactory init the ChannelCmdFactor with clients to endorser and orderer according to params
+func InitCmdFactory(isEndorserRequired EndorserRequirement, isOrdererRequired OrdererRequirement) (*ChannelCmdFactory, error) {
 	var err error
 
 	cmdFact := &ChannelCmdFactory{}
@@ -104,14 +114,16 @@ func InitCmdFactory(isOrdererRequired bool) (*ChannelCmdFactory, error) {
 		return common.GetBroadcastClient(orderingEndpoint, tls, caFile)
 	}
 
-	//for join, we need the endorser as well
-	if isOrdererRequired {
+	//for join and list, we need the endorser as well
+	if isEndorserRequired {
 		cmdFact.EndorserClient, err = common.GetEndorserClient()
 		if err != nil {
 			return nil, fmt.Errorf("Error getting endorser client %s: %s", channelFuncName, err)
 		}
-	} else {
+	}
 
+	//for create and fetch, we need the orderer as well
+	if isOrdererRequired {
 		if len(strings.Split(orderingEndpoint, ":")) != 2 {
 			return nil, fmt.Errorf("Ordering service endpoint %s is not valid or missing", orderingEndpoint)
 		}

peer/channel/create.go

@@ -202,7 +202,7 @@ func create(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
 
 	var err error
 	if cf == nil {
-		cf, err = InitCmdFactory(false)
+		cf, err = InitCmdFactory(EndorserNotRequired, OrdererRequired)
 		if err != nil {
 			return err
 		}

peer/channel/fetchconfig.go

@@ -42,7 +42,7 @@ func fetchCmd(cf *ChannelCmdFactory) *cobra.Command {
 func fetch(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
 	var err error
 	if cf == nil {
-		cf, err = InitCmdFactory(false)
+		cf, err = InitCmdFactory(EndorserNotRequired, OrdererRequired)
 		if err != nil {
 			return err
 		}

peer/channel/join.go

@@ -128,7 +128,7 @@ func executeJoin(cf *ChannelCmdFactory) (err error) {
 func join(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
 	var err error
 	if cf == nil {
-		cf, err = InitCmdFactory(true)
+		cf, err = InitCmdFactory(EndorserRequired, OrdererNotRequired)
 		if err != nil {
 			return err
 		}

peer/channel/list.go

@@ -91,7 +91,7 @@ func listCmd(cf *ChannelCmdFactory) *cobra.Command {
 func list(cf *ChannelCmdFactory) error {
 	var err error
 	if cf == nil {
-		cf, err = InitCmdFactory(true)
+		cf, err = InitCmdFactory(EndorserRequired, OrdererNotRequired)
 		if err != nil {
 			return err
 		}