Fix collect data days

README.md

@@ -51,8 +51,3 @@ cp .env{.sample,}
 ```
 make run
 ```
-
-## Known issues
-### Got daily cost as $0.000
-If you set CloudWatch Events Schedule near AM 0:00 in UTC, AWS has not reflect daily cost yet.
-So, you need to set the schedule for more later.

external/aws.go

@@ -27,7 +27,7 @@ func GetIconURL(service string) string {
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/BusinessApplications/SimpleEmailService.png?raw=true"
 	case "Amazon DynamoDB":
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/Database/DynamoDB.png?raw=true"
-	case "Amazon EC2 Container Registry (ECR)":
+	case "Amazon EC2 Container Registry (ECR)", "Amazon Elastic Container Registry Public":
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/Containers/ElasticContainerRegistry.png?raw=true"
 	case "Amazon Elastic Container Service":
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/Containers/ElasticContainerService.png?raw=true"
@@ -69,6 +69,10 @@ func GetIconURL(service string) string {
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/SecurityIdentityCompliance/GuardDuty.png?raw=true"
 	case "Amazon Elastic Container Service for Kubernetes":
 		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/Containers/EKSCloud.png?raw=true"
+	case "Amazon Cognito":
+		return "https://github.com/awslabs/aws-icons-for-plantuml/blob/main/dist/SecurityIdentityCompliance/Cognito.png?raw=true"
+	case "Tax":
+		return ""
 	default:
 		return ""
 	}
@@ -77,7 +81,7 @@ func GetIconURL(service string) string {
 func GetCost() (*costexplorer.GetCostAndUsageOutput, error) {
 	now := time.Now()
 	end := now.Format("2006-01-02")
-	twoDaysBefore := now.AddDate(0, 0, -2).Format("2006-01-02")
+	twoDaysBefore := now.AddDate(0, 0, -3).Format("2006-01-02")
 
 	granularity := "DAILY"
 	metrics := []string{

main.go

@@ -103,7 +103,12 @@ func handler() error {
 	text := i18y.Translate(Language, "title", fullName, yesterday.Format("2006-01-02"), cost[1].Total)
 	option := slack.MsgOptionText(text, false)
 
-	attachments := toAttachment(cost)
+	attachments, err := toAttachment(cost)
+	if err != nil {
+		log.Warn("failed to convert attachment, err=%w", err)
+		return err
+	}
+
 	err = slk.PostMessage(cfg.SlackChannel, option, slack.MsgOptionAttachments(attachments...))
 	if err != nil {
 		log.Warn("failed to post message to Slack, err=%w", err)
@@ -158,11 +163,10 @@ func toCost(result *costexplorer.Group) (ServiceDetail, error) {
 	}, nil
 }
 
-func toAttachment(cost []DailyCost) []slack.Attachment {
+func toAttachment(cost []DailyCost) ([]slack.Attachment, error) {
 	// Just day before yesterday and yesterday
-	if len(cost) != 2 {
-		log.Warn("cost length is not 2")
-		return nil
+	if len(cost) != 3 {
+		return nil, fmt.Errorf("cost length is not 3")
 	}
 
 	attachments := make([]slack.Attachment, len(cost[1].Services))
@@ -172,14 +176,14 @@ func toAttachment(cost []DailyCost) []slack.Attachment {
 		priceDiffStatement := ""
 		before, ok := cost[0].Services[name]
 		if ok {
-			diff := (detail.CostAmount / before.CostAmount) * 100
+			diff := ((detail.CostAmount / before.CostAmount) - 1) * 100
 
 			if !math.IsNaN(diff) {
 				diffMark := ""
 				// Set red color if diff is over 100%
-				if diff == 100 {
+				if diff == 0 {
 					color = "#ffffff"
-				} else if diff > 100 {
+				} else if diff > 0 {
 					color = "#ff0000"
 					diffMark = "📈"
 				} else {
@@ -188,7 +192,7 @@ func toAttachment(cost []DailyCost) []slack.Attachment {
 				}
 
 				priceDiffStatement = fmt.Sprintf(
-					" ( %s %.1f%% )",
+					" ( %s %.3f%% )",
 					diffMark,
 					diff,
 				)
@@ -222,5 +226,5 @@ func toAttachment(cost []DailyCost) []slack.Attachment {
 		attachments = append(attachments, attachment)
 	}
 
-	return attachments
+	return attachments, nil
 }