feat(prune): add prune files feature

This feature allows you to specify the n latest backups to keep in the
bucket.

uploader/uploader.go

@@ -1,11 +1,10 @@
 package uploader
 
 import (
+	"backup-tool/helpers"
 	"context"
 	"errors"
-	"fmt"
 	"github.com/minio/minio-go/v7"
-	"github.com/minio/minio-go/v7/pkg/credentials"
 	"log"
 	"os"
 )
@@ -13,15 +12,15 @@ import (
 func UploadFile(bucketName, endpoint, fileName string) error {
 
 	ctx := context.Background()
-	accessKeyID, secretAccessKey, err := getCredentials()
+	accessKeyID, secretAccessKey, err := helpers.GetCredentials()
 	if err != nil {
 		return (err)
 	}
-	client, err := createClient(accessKeyID, secretAccessKey, endpoint)
+	client, err := helpers.CreateClient(accessKeyID, secretAccessKey, endpoint)
 	if err != nil {
 		return (err)
 	}
-	err = verifyBucket(client, ctx, bucketName)
+	err = helpers.VerifyBucket(client, ctx, bucketName)
 	if err != nil {
 		return err
 	}
@@ -51,42 +50,3 @@ func validateUploadFile(fileName string) (string, string, error) {
 
 	return fileName, file.Name(), nil
 }
-
-func verifyBucket(client *minio.Client, ctx context.Context, bucketName string) error {
-	exists, err := client.BucketExists(ctx, bucketName)
-	if err != nil {
-		return err
-	}
-
-	if !exists {
-		return errors.New(fmt.Sprintf("bucket %s does not exist\n", bucketName))
-	}
-
-	return nil
-}
-
-func createClient(accessKeyID, secretAccessKey, endpoint string) (*minio.Client, error) {
-	// Initialize minio client object.
-	minioClient, err := minio.New(endpoint, &minio.Options{
-		Creds:  credentials.NewStaticV4(accessKeyID, secretAccessKey, ""),
-		Secure: true,
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	return minioClient, nil
-}
-
-func getCredentials() (string, string, error) {
-	// get credentials from env vars
-	keyName := os.Getenv("KEY_ID")
-	if keyName == "" {
-		return "", "", errors.New("missing or empty KEY_ID")
-	}
-	applicationKey := os.Getenv("APPLICATION_KEY")
-	if applicationKey == "" {
-		return "", "", errors.New("missing or empty APPLICATION_KEY")
-	}
-	return keyName, applicationKey, nil
-}