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sesLambdaEventSourceResource.go
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sesLambdaEventSourceResource.go
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package resources
import (
"encoding/json"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ses"
gocf "github.com/mweagle/go-cloudformation"
"github.com/sirupsen/logrus"
)
// SESLambdaEventSourceResourceAction represents an SES rule action
// TODO - specialized types for Actions
type SESLambdaEventSourceResourceAction struct {
ActionType *gocf.StringExpr
ActionProperties map[string]interface{}
}
func (action *SESLambdaEventSourceResourceAction) toReceiptAction(logger *logrus.Logger) *ses.ReceiptAction {
actionProperties := action.ActionProperties
switch action.ActionType.Literal {
case "LambdaAction":
action := &ses.ReceiptAction{
LambdaAction: &ses.LambdaAction{
FunctionArn: aws.String(actionProperties["FunctionArn"].(string)),
InvocationType: aws.String("Event"),
},
}
if val, exists := actionProperties["InvocationType"]; exists {
action.LambdaAction.InvocationType = aws.String(val.(string))
}
if val, exists := actionProperties["TopicArn"]; exists {
action.LambdaAction.TopicArn = aws.String(val.(string))
}
return action
case "S3Action":
action := &ses.ReceiptAction{
S3Action: &ses.S3Action{
BucketName: aws.String(actionProperties["BucketName"].(string)),
},
}
if val, exists := actionProperties["KmsKeyArn"]; exists {
action.S3Action.KmsKeyArn = aws.String(val.(string))
}
if val, exists := actionProperties["ObjectKeyPrefix"]; exists {
action.S3Action.ObjectKeyPrefix = aws.String(val.(string))
}
if val, exists := actionProperties["TopicArn"]; exists {
action.S3Action.TopicArn = aws.String(val.(string))
}
return action
default:
logger.Error("No SESLmabdaEventSourceResourceAction marshaler found for action: " + action.ActionType.Literal)
}
return nil
}
// SESLambdaEventSourceResourceRule stores settings necessary to configure an SES
// inbound rule
type SESLambdaEventSourceResourceRule struct {
Name *gocf.StringExpr
Actions []*SESLambdaEventSourceResourceAction
ScanEnabled *gocf.BoolExpr `json:",omitempty"`
Enabled *gocf.BoolExpr `json:",omitempty"`
Recipients []*gocf.StringExpr
TLSPolicy *gocf.StringExpr `json:",omitempty"`
}
func ensureSESRuleSetName(ruleSetName string, svc *ses.SES, logger *logrus.Logger) error {
describeInput := &ses.DescribeReceiptRuleSetInput{
RuleSetName: aws.String(ruleSetName),
}
var opError error
describeRuleSet, describeRuleSetErr := svc.DescribeReceiptRuleSet(describeInput)
if nil != describeRuleSetErr {
if strings.Contains(describeRuleSetErr.Error(), "RuleSetDoesNotExist") {
createRuleSet := &ses.CreateReceiptRuleSetInput{
RuleSetName: aws.String(ruleSetName),
}
logger.WithFields(logrus.Fields{
"createRuleSet": createRuleSet,
}).Info("Creating Sparta SES Rule set")
_, opError = svc.CreateReceiptRuleSet(createRuleSet)
}
} else {
logger.WithFields(logrus.Fields{
"describeRuleSet": describeRuleSet,
}).Info("SES Rule Set already exists")
}
return opError
}
// SESLambdaEventSourceResourceRequest defines the request properties to configure
// SES
type SESLambdaEventSourceResourceRequest struct {
RuleSetName *gocf.StringExpr
Rules []*SESLambdaEventSourceResourceRule
}
// SESLambdaEventSourceResource handles configuring SES configuration
type SESLambdaEventSourceResource struct {
gocf.CloudFormationCustomResource
SESLambdaEventSourceResourceRequest
}
func (command SESLambdaEventSourceResource) updateSESRules(areRulesActive bool,
session *session.Session,
event *CloudFormationLambdaEvent,
logger *logrus.Logger) (map[string]interface{}, error) {
unmarshalErr := json.Unmarshal(event.ResourceProperties, &command)
if unmarshalErr != nil {
return nil, unmarshalErr
}
svc := ses.New(session)
opError := ensureSESRuleSetName(command.RuleSetName.Literal, svc, logger)
if nil == opError {
for _, eachRule := range command.Rules {
if areRulesActive {
createReceiptRule := &ses.CreateReceiptRuleInput{
RuleSetName: aws.String(command.RuleSetName.Literal),
Rule: &ses.ReceiptRule{
Name: aws.String(eachRule.Name.Literal),
Recipients: make([]*string, 0),
Actions: make([]*ses.ReceiptAction, 0),
ScanEnabled: aws.Bool(eachRule.ScanEnabled.Literal),
TlsPolicy: aws.String(eachRule.TLSPolicy.Literal),
Enabled: aws.Bool(eachRule.Enabled.Literal),
},
}
for _, eachAction := range eachRule.Actions {
createReceiptRule.Rule.Actions = append(createReceiptRule.Rule.Actions, eachAction.toReceiptAction(logger))
}
_, opError = svc.CreateReceiptRule(createReceiptRule)
} else {
// Delete them...
deleteReceiptRule := &ses.DeleteReceiptRuleInput{
RuleSetName: aws.String(command.RuleSetName.Literal),
RuleName: aws.String(eachRule.Name.Literal),
}
_, opError = svc.DeleteReceiptRule(deleteReceiptRule)
}
if nil != opError {
return nil, opError
}
}
}
return nil, opError
}
// IAMPrivileges returns the IAM privs for this custom action
func (command *SESLambdaEventSourceResource) IAMPrivileges() []string {
return []string{"ses:CreateReceiptRuleSet",
"ses:CreateReceiptRule",
"ses:DeleteReceiptRule",
"ses:DeleteReceiptRuleSet",
"ses:DescribeReceiptRuleSet"}
}
// Create implements the custom resource create operation
func (command SESLambdaEventSourceResource) Create(awsSession *session.Session,
event *CloudFormationLambdaEvent,
logger *logrus.Logger) (map[string]interface{}, error) {
return command.updateSESRules(true, awsSession, event, logger)
}
// Update implements the custom resource update operation
func (command SESLambdaEventSourceResource) Update(awsSession *session.Session,
event *CloudFormationLambdaEvent,
logger *logrus.Logger) (map[string]interface{}, error) {
return command.updateSESRules(true, awsSession, event, logger)
}
// Delete implements the custom resource delete operation
func (command SESLambdaEventSourceResource) Delete(awsSession *session.Session,
event *CloudFormationLambdaEvent,
logger *logrus.Logger) (map[string]interface{}, error) {
return command.updateSESRules(false, awsSession, event, logger)
}