Revert "Remove deprecated mqtrigger with kind fission (#2875)" (#2946)

* Revert "Remove deprecated mqtrigger with kind fission (#2875)"

This reverts commit f44174debc.

* Upgrade sarama version to v1.43.2

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/mqtrigger/validator/validator.go

@@ -16,7 +16,13 @@ limitations under the License.
 
 package validator
 
+import (
+	"sync"
+)
+
 var (
+	topicValidators      = make(map[string]TopicValidator)
+	lock                 = sync.Mutex{}
 	kedaMqTypeValidators = map[string]bool{
 		"kafka":              true,
 		"aws-sqs-queue":      true,
@@ -29,13 +35,41 @@ var (
 	}
 )
 
-func IsValidTopic(mqtKind string) bool {
-	return mqtKind == "keda"
+type (
+	TopicValidator func(topic string) bool
+)
+
+func Register(mqType string, validator TopicValidator) {
+	lock.Lock()
+	defer lock.Unlock()
+
+	if validator == nil {
+		panic("Nil message queue topic validator")
+	}
+
+	_, registered := topicValidators[mqType]
+	if registered {
+		panic("Message queue topic validator already register")
+	}
+
+	topicValidators[mqType] = validator
+}
+
+func IsValidTopic(mqType, topic, mqtKind string) bool {
+	if mqtKind == "keda" {
+		return true
+	}
+	validator, registered := topicValidators[mqType]
+	if !registered {
+		return false
+	}
+	return validator(topic)
 }
 
 func IsValidMessageQueue(mqType, mqtKind string) bool {
 	if mqtKind == "keda" {
 		return kedaMqTypeValidators[mqType]
 	}
-	return false
+	_, registered := topicValidators[mqType]
+	return registered
 }