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validators.go
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validators.go
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package topiccmdutil
import (
"context"
"fmt"
"net/http"
"regexp"
"strconv"
"github.com/redhat-developer/app-services-cli/pkg/core/errors"
"github.com/redhat-developer/app-services-cli/pkg/core/localize"
"github.com/redhat-developer/app-services-cli/pkg/shared/connection"
"github.com/redhat-developer/app-services-cli/pkg/shared/factory"
)
const (
legalNameChars = "^[a-zA-Z0-9._-]+$"
maxNameLength = 249
minPartitions = 1
maxPartitions = 1000
)
// Validator is a type for validating Kafka topic configuration values
type Validator struct {
Localizer localize.Localizer
InstanceID string
Connection factory.ConnectionFunc
CurPartitions int
}
// ValidateName validates the name of the topic
func (v *Validator) ValidateName(val interface{}) error {
name, ok := val.(string)
if !ok {
return errors.NewCastError(val, "string")
}
if len(name) < 1 {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.name.error.required")
} else if len(name) > maxNameLength {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.name.error.lengthError", localize.NewEntry("MaxNameLen", maxNameLength))
}
if (name == ".") || (name == "..") {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.name.error.dotsError")
}
matched, _ := regexp.Match(legalNameChars, []byte(name))
if matched {
return nil
}
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.name.error.invalidChars", localize.NewEntry("Name", name))
}
func (v *Validator) ValidateSearchInput(val interface{}) error {
search, ok := val.(string)
if !ok {
return errors.NewCastError(val, "string")
}
matched, _ := regexp.Match(legalNameChars, []byte(search))
if matched {
return nil
}
return v.Localizer.MustLocalizeError("kafka.topic.list.error.illegalSearchValue", localize.NewEntry("Search", search))
}
// ValidatePartitionsN performs validation on the number of partitions v
func (v *Validator) ValidatePartitionsN(val interface{}) error {
partitionsStr := fmt.Sprintf("%v", val)
if partitionsStr == "" {
return nil
}
partitions, err := strconv.Atoi(partitionsStr)
if err != nil {
return errors.NewCastError(val, "int32")
}
if partitions < minPartitions {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.partitions.error.invalid.minValue", localize.NewEntry("Partitions", partitions), localize.NewEntry("Min", minPartitions))
}
if partitions < v.CurPartitions {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.partitions.error.invalid.lesserValue", localize.NewEntry("CurrPartitions", v.CurPartitions), localize.NewEntry("Partitions", partitions))
}
if partitions > maxPartitions {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.partitions.error.invalid.maxValue", localize.NewEntry("Partitions", partitions), localize.NewEntry("Max", maxPartitions))
}
return nil
}
// ValidateMessageRetentionPeriod validates the value (ms) of the retention period
// the valid values can range from [-1,...]
func (v *Validator) ValidateMessageRetentionPeriod(val interface{}) error {
retentionPeriodMsStr := fmt.Sprintf("%v", val)
if retentionPeriodMsStr == "" {
return nil
}
retentionPeriodMs, err := strconv.Atoi(retentionPeriodMsStr)
if err != nil {
return errors.NewCastError(val, "int")
}
if retentionPeriodMs < -1 {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.retentionPeriod.error.invalid", localize.NewEntry("RetentionPeriod", retentionPeriodMs))
}
return nil
}
// ValidateMessageRetentionSize validates the value (bytes) of the retention size
// the valid values can range from [-1,...]
func (v *Validator) ValidateMessageRetentionSize(val interface{}) error {
retentionSizeStr := fmt.Sprintf("%v", val)
if retentionSizeStr == "" {
return nil
}
retentionPeriodBytes, err := strconv.Atoi(retentionSizeStr)
if err != nil {
return errors.NewCastError(val, "int")
}
if retentionPeriodBytes < -1 {
return v.Localizer.MustLocalizeError("kafka.topic.common.validation.retentionSize.error.invalid", localize.NewEntry("RetentionSize", retentionPeriodBytes))
}
return nil
}
// ValidateNameIsAvailable checks if a topic with the given name already exists
func (v *Validator) ValidateNameIsAvailable(val interface{}) error {
name := fmt.Sprintf("%v", val)
conn, err := v.Connection(connection.DefaultConfigRequireMasAuth)
if err != nil {
return err
}
api, kafkaInstance, err := conn.API().KafkaAdmin(v.InstanceID)
if err != nil {
return err
}
_, httpRes, _ := api.TopicsApi.GetTopic(context.Background(), name).Execute()
if httpRes != nil {
defer httpRes.Body.Close()
if httpRes.StatusCode == http.StatusOK {
return v.Localizer.MustLocalizeError("kafka.topic.create.error.conflictError", localize.NewEntry("TopicName", name), localize.NewEntry("InstanceName", kafkaInstance.GetName()))
}
}
return nil
}