feat: add skip message by header filter function for cronsumer

.gitignore

@@ -1,4 +1,5 @@
 .idea
 dist/
 unit_coverage.out
-unit_coverage.html
+unit_coverage.html
+.DS_Store

.golangci.yml

@@ -8,7 +8,6 @@ linters:
   disable-all: true
   enable:
     - bodyclose
-    - depguard
     - errcheck
     - dupl
     - exhaustive
@@ -43,6 +42,7 @@ issues:
     - path: _test\.go
       linters:
         - errcheck
+        - gosec
         - funlen
 
 service:

README.md

@@ -251,6 +251,7 @@ under [the specified folder](examples/with-sasl-plaintext) and then start the ap
 | `retryConfiguration.sasl.authType`               | `SCRAM` or `PLAIN`                                                                                                                    |                             |
 | `retryConfiguration.sasl.username`               | SCRAM OR PLAIN username                                                                                                               |                             |
 | `retryConfiguration.sasl.password`               | SCRAM OR PLAIN password                                                                                                               |                             |
+| `retryConfiguration.skipMessageByHeaderFn`       | Function to filter messages based on headers, return true if you want to skip the message	                                            | nil                         |
 | `batchConfiguration.messageGroupLimit`           | Maximum number of messages in a batch                                                                                                 |                             |
 | `batchConfiguration.batchConsumeFn`              | Kafka batch consumer function, if retry enabled it, is also used to consume retriable messages                                        |                             |
 | `batchConfiguration.preBatchFn`                  | This function enable for transforming messages before batch consuming starts                                                          |                             |

consumer_config.go

@@ -76,6 +76,12 @@
 		LogLevel: lcronsumer.Level(cfg.RetryConfiguration.LogLevel),
 	}
 
+	if cfg.RetryConfiguration.SkipMessageByHeaderFn != nil {
+		cronsumerCfg.Consumer.SkipMessageByHeaderFn = func(headers []kcronsumer.Header) bool {
+			return cfg.RetryConfiguration.SkipMessageByHeaderFn(toHeaders(headers))
+		}
+	}
+
 	if !cfg.RetryConfiguration.SASL.IsEmpty() {
 		cronsumerCfg.SASL.Enabled = true
 		cronsumerCfg.SASL.AuthType = string(cfg.RetryConfiguration.SASL.Type)
@@ -110,18 +116,32 @@
 	Propagator     propagation.TextMapPropagator
 }
 
+type SkipMessageByHeaderFn func(headers []Header) bool
+
+func toHeaders(cronsumerHeaders []kcronsumer.Header) []Header {
+	headers := make([]Header, 0, len(cronsumerHeaders))
+	for i := range cronsumerHeaders {
+		headers = append(headers, Header{
+			Key:   cronsumerHeaders[i].Key,
+			Value: cronsumerHeaders[i].Value,
+		})
+	}
+	return headers
+}
+
 type RetryConfiguration struct {
-	SASL            *SASLConfig
-	TLS             *TLSConfig
-	ClientID        string
-	StartTimeCron   string
-	Topic           string
-	DeadLetterTopic string
-	Rack            string
-	LogLevel        LogLevel
-	Brokers         []string
-	MaxRetry        int
-	WorkDuration    time.Duration
+	SASL                  *SASLConfig
+	TLS                   *TLSConfig
+	ClientID              string
+	StartTimeCron         string
+	Topic                 string
+	DeadLetterTopic       string
+	Rack                  string
+	LogLevel              LogLevel
+	Brokers               []string
+	MaxRetry              int
+	WorkDuration          time.Duration
+	SkipMessageByHeaderFn SkipMessageByHeaderFn
 }
 
 type BatchConfiguration struct {

consumer_config_test.go

@@ -3,6 +3,9 @@ package kafka
 import (
 	"testing"
 	"time"
+
+	kcronsumer "github.com/Trendyol/kafka-cronsumer/pkg/kafka"
+	"github.com/google/go-cmp/cmp"
 )
 
 func TestConsumerConfig_validate(t *testing.T) {
@@ -61,3 +64,77 @@ func TestConsumerConfig_validate(t *testing.T) {
 		}
 	})
 }
+
+func TestConsumerConfig_newCronsumerConfig(t *testing.T) {
+	t.Run("Should_Return_Nil_When_Client_Don't_Use_SkipMessageByHeaderFn", func(t *testing.T) {
+		// Given
+		cfg := ConsumerConfig{}
+
+		// When
+		actual := cfg.newCronsumerConfig()
+
+		// Then
+		if actual.Consumer.SkipMessageByHeaderFn != nil {
+			t.Error("SkipMessageByHeaderFn must be nil")
+		}
+	})
+	t.Run("Should_Set_When_Client_Give_SkipMessageByHeaderFn", func(t *testing.T) {
+		// Given
+		cfg := ConsumerConfig{
+			RetryConfiguration: RetryConfiguration{
+				SkipMessageByHeaderFn: func(headers []Header) bool {
+					return false
+				},
+			},
+		}
+
+		// When
+		actual := cfg.newCronsumerConfig()
+
+		// Then
+		if actual.Consumer.SkipMessageByHeaderFn == nil {
+			t.Error("SkipMessageByHeaderFn mustn't be nil")
+		}
+	})
+}
+
+func Test_toHeader(t *testing.T) {
+	t.Run("Should_Return_Empty_List_When_Cronsumer_Header_Is_Nil", func(t *testing.T) {
+		// When
+		headers := toHeaders(nil)
+
+		// Then
+		if len(headers) != 0 {
+			t.Error("Header must be nil")
+		}
+	})
+	t.Run("Should_Return_Empty_List_When_Cronsumer_Header_Is_Empty", func(t *testing.T) {
+		// When
+		headers := toHeaders([]kcronsumer.Header{})
+
+		// Then
+		if len(headers) != 0 {
+			t.Error("Header must be nil")
+		}
+	})
+	t.Run("Should_Covert_List_When_Cronsumer_Header", func(t *testing.T) {
+		// Given
+		expected := []Header{
+			{Key: "key", Value: []byte("val")},
+			{Key: "key2", Value: []byte("val2")},
+			{Key: "key3", Value: nil},
+		}
+
+		// When
+		actual := toHeaders([]kcronsumer.Header{
+			{Key: "key", Value: []byte("val")},
+			{Key: "key2", Value: []byte("val2")},
+			{Key: "key3", Value: nil},
+		})
+
+		// Then
+		if diff := cmp.Diff(expected, actual); diff != "" {
+			t.Error(diff)
+		}
+	})
+}

go.mod

@@ -3,7 +3,7 @@ module github.com/Trendyol/kafka-konsumer/v2
 go 1.19
 
 require (
-	github.com/Trendyol/kafka-cronsumer v1.4.6
+	github.com/Trendyol/kafka-cronsumer v1.4.7
 	github.com/Trendyol/otel-kafka-konsumer v0.0.7
 	github.com/ansrivas/fiberprometheus/v2 v2.6.1
 	github.com/gofiber/fiber/v2 v2.50.0

go.sum

@@ -1,5 +1,5 @@
-github.com/Trendyol/kafka-cronsumer v1.4.6 h1:Hc6afln69+cCAyaYJSQRnjzH5gZ9dpNa/PsBeXiL5GY=
-github.com/Trendyol/kafka-cronsumer v1.4.6/go.mod h1:VpweJmKY+6dppFhzWOZDbZfxBNuJkSxB12CcuZWBNFU=
+github.com/Trendyol/kafka-cronsumer v1.4.7 h1:xmjxSBJzRRkuaO8k0S4baePyVVLJf3apl7nRiMXFnUY=
+github.com/Trendyol/kafka-cronsumer v1.4.7/go.mod h1:VpweJmKY+6dppFhzWOZDbZfxBNuJkSxB12CcuZWBNFU=
 github.com/Trendyol/otel-kafka-konsumer v0.0.7 h1:sT1TE2rgfsdrJWrXKz5j6dPkKJsvP+Tv0Dea4ORqJ+4=
 github.com/Trendyol/otel-kafka-konsumer v0.0.7/go.mod h1:zdCaFclzRCO9fzcjxkHrWOB3I2+uTPrmkq4zczkD1F0=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=

test/integration/go.mod

@@ -10,7 +10,7 @@ require (
 )
 
 require (
-	github.com/Trendyol/kafka-cronsumer v1.4.6 // indirect
+	github.com/Trendyol/kafka-cronsumer v1.4.7 // indirect
 	github.com/Trendyol/otel-kafka-konsumer v0.0.7 // indirect
 	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/ansrivas/fiberprometheus/v2 v2.6.1 // indirect

test/integration/go.sum

@@ -1,5 +1,6 @@
 github.com/Trendyol/kafka-cronsumer v1.4.6 h1:Hc6afln69+cCAyaYJSQRnjzH5gZ9dpNa/PsBeXiL5GY=
 github.com/Trendyol/kafka-cronsumer v1.4.6/go.mod h1:VpweJmKY+6dppFhzWOZDbZfxBNuJkSxB12CcuZWBNFU=
+github.com/Trendyol/kafka-cronsumer v1.4.7/go.mod h1:VpweJmKY+6dppFhzWOZDbZfxBNuJkSxB12CcuZWBNFU=
 github.com/Trendyol/otel-kafka-konsumer v0.0.7 h1:sT1TE2rgfsdrJWrXKz5j6dPkKJsvP+Tv0Dea4ORqJ+4=
 github.com/Trendyol/otel-kafka-konsumer v0.0.7/go.mod h1:zdCaFclzRCO9fzcjxkHrWOB3I2+uTPrmkq4zczkD1F0=
 github.com/andybalholm/brotli v1.0.5 h1:8uQZIdzKmjc/iuPu7O2ioW48L81FgatrcpfFmiq/cCs=