Go: Implement Exists, Expire related commands and TTL commands

go/api/base_client.go

@@ -957,3 +957,130 @@ func (client *baseClient) Del(keys []string) (Result[int64], error) {
 
 	return handleLongResponse(result)
 }
+
+func (client *baseClient) Exists(keys []string) (Result[int64], error) {
+	result, err := client.executeCommand(C.Exists, keys)
+	if err != nil {
+		return CreateNilInt64Result(), err
+	}
+
+	return handleLongResponse(result)
+}
+
+func (client *baseClient) Expire(key string, seconds int64) (Result[bool], error) {
+	result, err := client.executeCommand(C.Expire, []string{key, utils.IntToString(seconds)})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) ExpireWithOptions(key string, seconds int64, expireCondition ExpireCondition) (Result[bool], error) {
+	expireConditionStr, err := expireCondition.toString()
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	result, err := client.executeCommand(C.Expire, []string{key, utils.IntToString(seconds), expireConditionStr})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) ExpireAt(key string, unixTimestampInSeconds int64) (Result[bool], error) {
+	result, err := client.executeCommand(C.ExpireAt, []string{key, utils.IntToString(unixTimestampInSeconds)})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) ExpireAtWithOptions(key string, unixTimestampInSeconds int64, expireCondition ExpireCondition) (Result[bool], error) {
+	expireConditionStr, err := expireCondition.toString()
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	result, err := client.executeCommand(C.ExpireAt, []string{key, utils.IntToString(unixTimestampInSeconds), expireConditionStr})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) PExpire(key string, milliseconds int64) (Result[bool], error) {
+	result, err := client.executeCommand(C.PExpire, []string{key, utils.IntToString(milliseconds)})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) PExpireWithOptions(key string, milliseconds int64, expireCondition ExpireCondition) (Result[bool], error) {
+	expireConditionStr, err := expireCondition.toString()
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	result, err := client.executeCommand(C.PExpire, []string{key, utils.IntToString(milliseconds), expireConditionStr})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) PExpireAt(key string, unixTimestampInMilliSeconds int64) (Result[bool], error) {
+	result, err := client.executeCommand(C.PExpireAt, []string{key, utils.IntToString(unixTimestampInMilliSeconds)})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) PExpireAtWithOptions(key string, unixTimestampInMilliSeconds int64, expireCondition ExpireCondition) (Result[bool], error) {
+	expireConditionStr, err := expireCondition.toString()
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	result, err := client.executeCommand(C.PExpireAt, []string{key, utils.IntToString(unixTimestampInMilliSeconds), expireConditionStr})
+	if err != nil {
+		return CreateNilBoolResult(), err
+	}
+	return handleBooleanResponse(result)
+}
+
+func (client *baseClient) ExpireTime(key string) (Result[int64], error) {
+	result, err := client.executeCommand(C.ExpireTime, []string{key})
+	if err != nil {
+		return CreateNilInt64Result(), err
+	}
+
+	return handleLongResponse(result)
+}
+
+func (client *baseClient) PExpireTime(key string) (Result[int64], error) {
+	result, err := client.executeCommand(C.PExpireTime, []string{key})
+	if err != nil {
+		return CreateNilInt64Result(), err
+	}
+
+	return handleLongResponse(result)
+}
+
+func (client *baseClient) TTL(key string) (Result[int64], error) {
+	result, err := client.executeCommand(C.TTL, []string{key})
+	if err != nil {
+		return CreateNilInt64Result(), err
+	}
+
+	return handleLongResponse(result)
+}
+
+func (client *baseClient) PTTL(key string) (Result[int64], error) {
+	result, err := client.executeCommand(C.PTTL, []string{key})
+	if err != nil {
+		return CreateNilInt64Result(), err
+	}
+
+	return handleLongResponse(result)
+}

go/api/command_options.go

@@ -120,6 +120,34 @@ const (
 	OnlyIfDoesNotExist ConditionalSet = "NX"
 )
 
+type ExpireCondition string
+
+const (
+	// HasExistingExpiry only sets the key if it already exists. Equivalent to "XX" in the valkey API.
+	HasExistingExpiry ExpireCondition = "XX"
+	// HasNoExpiry only sets the key if it does not already exist. Equivalent to "NX" in the valkey API.
+	HasNoExpiry ExpireCondition = "NX"
+	// NewExpiryGreaterThanCurrent only sets the key if its greater than current. Equivalent to "GT" in the valkey API.
+	NewExpiryGreaterThanCurrent ExpireCondition = "GT"
+	// NewExpiryLessThanCurrent only sets the key if its lesser than current. Equivalent to "LT" in the valkey API.
+	NewExpiryLessThanCurrent ExpireCondition = "LT"
+)
+
+func (expireCondition ExpireCondition) toString() (string, error) {
+	switch expireCondition {
+	case HasExistingExpiry:
+		return string(HasExistingExpiry), nil
+	case HasNoExpiry:
+		return string(HasNoExpiry), nil
+	case NewExpiryGreaterThanCurrent:
+		return string(NewExpiryGreaterThanCurrent), nil
+	case NewExpiryLessThanCurrent:
+		return string(NewExpiryLessThanCurrent), nil
+	default:
+		return "", &RequestError{"Invalid expire condition"}
+	}
+}
+
 // Expiry is used to configure the lifetime of a value.
 type Expiry struct {
 	Type  ExpiryType

go/api/commands.go

@@ -186,9 +186,12 @@ type StringCommands interface {
 	// the entire operation fails.
 	//
 	// Note:
-	//  When in cluster mode, all keys in keyValueMap must map to the same hash slot.
-	//
-	// See [valkey.io] for details.
+	//  In cluster mode, if keys in `keyValueMap` map to different hash slots, the command
+	//  will be split across these slots and executed separately for each. This means the command
+	//  is atomic only at the slot level. If one or more slot-specific requests fail, the entire
+	//  call will return the first encountered error, even though some requests may have succeeded
+	//  while others did not. If this behavior impacts your application logic, consider splitting
+	//  the request into sub-requests per slot to ensure atomicity.
 	//
 	// Parameters:
 	//  keyValueMap - A key-value map consisting of keys and their respective values to set.
@@ -414,9 +417,12 @@ type StringCommands interface {
 	//  Valkey 7.0 and above.
 	//
 	// Note:
-	//  When in cluster mode, key1 and key2 must map to the same hash slot.
-	//
-	// See [valkey.io] for details.
+	//  In cluster mode, if keys in `keyValueMap` map to different hash slots, the command
+	//  will be split across these slots and executed separately for each. This means the command
+	//  is atomic only at the slot level. If one or more slot-specific requests fail, the entire
+	//  call will return the first encountered error, even though some requests may have succeeded
+	//  while others did not. If this behavior impacts your application logic, consider splitting
+	//  the request into sub-requests per slot to ensure atomicity.
 	//
 	// Parameters:
 	//  key1 - The key that stores the first string.