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delete.go
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delete.go
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package aws
import (
"context"
"errors"
"github.com/MichaelPalmer1/scoutr-go/pkg/providers/base"
"github.com/MichaelPalmer1/scoutr-go/pkg/types"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue"
"github.com/aws/aws-sdk-go-v2/feature/dynamodb/expression"
"github.com/aws/aws-sdk-go-v2/service/dynamodb"
"github.com/aws/smithy-go"
"github.com/sirupsen/logrus"
)
// Delete : Delete an item
func (api DynamoAPI) Delete(request types.Request, partitionKey map[string]interface{}) error {
// Get the user
user, err := api.InitializeRequest(request)
if err != nil {
// Bad user - pass the error through
return err
}
// Build partition key
dynamoKeyParts, err := attributevalue.MarshalMap(partitionKey)
if err != nil {
logrus.Errorln("Failed to marshal partition key", err)
return err
}
// Build filters
var expr expression.Expression
conditions, err := api.filtering.Filter(user, nil, base.FilterActionDelete)
if err != nil {
logrus.Errorln("Error encountered during filtering", err)
return err
}
// Get key schema
keySchema, err := api.Client.DescribeTable(context.TODO(), &dynamodb.DescribeTableInput{
TableName: aws.String(api.Config.DataTable),
})
if err != nil {
logrus.Errorln("Failed to describe table", err)
return err
}
// Append key schema conditions
for _, schema := range keySchema.Table.KeySchema {
conditions = api.filtering.And(conditions, expression.Name(*schema.AttributeName).AttributeExists())
}
// Build expression
if conditions != nil {
expr, err = expression.NewBuilder().WithCondition(conditions.(expression.ConditionBuilder)).Build()
if err != nil {
logrus.Errorln("Encountered error while building expression", err)
return err
}
}
// Delete the item from dynamo
if err := api.DeleteItem(api.Config.DataTable, dynamoKeyParts, &expr); err != nil {
logrus.Errorln("Error while attempting to delete item in dynamo", err)
// Check if this was a conditional check failure
var apiErr smithy.APIError
if errors.As(err, &apiErr) && apiErr.ErrorCode() == "ConditionalCheckFailedException" {
return &types.BadRequest{
Message: "Item does not exist or you do not have permission to delete it",
}
}
return err
}
// Create audit log
api.auditLog(base.AuditActionDelete, request, user, partitionKey, nil)
return nil
}