added functions

app/object-storage/object-storage.go

@@ -28,6 +28,12 @@ func removeTransactionFromBlobStorage(transaction Transaction, database Database
 }
 
 func fakeTransaction(transactionToFake Transaction, fakeTransaction Transaction, database Database) Database {
+	for i, trans := range database {
+		if trans.Id == transactionToFake.Id {
+			database[i] = fakeTransaction
+			break
+		}
+	}
 	return database
 }
 
@@ -77,17 +83,6 @@ func writeDatabaseToBlobStorage(database Database, blob Blob) {
 	}
 }
 
-// Azure Storage Quickstart Sample - Demonstrate how to upload, list, download, and delete blobs.
-//
-// Documentation References:
-// - What is a Storage Account - https://docs.microsoft.com/azure/storage/common/storage-create-storage-account
-// - Blob Service Concepts - https://docs.microsoft.com/rest/api/storageservices/Blob-Service-Concepts
-// - Blob Service Go SDK API - https://godoc.org/github.com/Azure/azure-storage-blob-go
-// - Blob Service REST API - https://docs.microsoft.com/rest/api/storageservices/Blob-Service-REST-API
-// - Scalability and performance targets - https://docs.microsoft.com/azure/storage/common/storage-scalability-targets
-// - Azure Storage Performance and Scalability checklist https://docs.microsoft.com/azure/storage/common/storage-performance-checklist
-// - Storage Emulator - https://docs.microsoft.com/azure/storage/common/storage-use-emulator
-
 func randomString() string {
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 	return strconv.Itoa(r.Int())
@@ -166,6 +161,18 @@ func ListBlobs(blob Blob) {
 	}
 }
 
+func PrintingDatabaseToConsole(database Database) {
+	for i, trans := range database {
+		fmt.Println("--------------------")
+		fmt.Printf("\nListing transactions number %d in database\n", i)
+		fmt.Printf("Transaction id: %s\n", trans.Id)
+		fmt.Printf("Transaction sender: %s\n", trans.Sender)
+		fmt.Printf("Transaction receiver: %s\n", trans.Receiver)
+		fmt.Printf("Transaction amount: %s\n", trans.Amount)
+		fmt.Println("--------------------")
+	}
+}
+
 func TestObjectStorage() {
 	ctx := context.Background()
 	// url := "https://hepiadistributedsystems.blob.core.windows.net/" //replace <StorageAccountName> with your Azure storage account name
@@ -189,12 +196,33 @@ func TestObjectStorage() {
 	db = addTransactionToBlobStorage(t1, db, objectStorage)
 	db = addTransactionToBlobStorage(t2, db, objectStorage)
 
-	fmt.Printf("Press enter key to delete the blob fils, example container, and exit the application.\n")
+	fmt.Println("Listing files in container")
+	db1 := readDatabaseFromBlobStorage(objectStorage)
+	PrintingDatabaseToConsole(db1)
+	fmt.Println("Press enter to continue")
+	bufio.NewReader(os.Stdin).ReadBytes('\n')
+
+	fmt.Println("Going to fake a transaction (replacing the first with a new one)")
+	t3 := Transaction{
+		Id:       "0",
+		Sender:   "0",
+		Receiver: "1",
+		Amount:   "1000000",
+	}
+	db = fakeTransaction(t1, t3, db)
+	writeDatabaseToBlobStorage(db, objectStorage)
+	fmt.Println("Listing files in container")
+	db2 := readDatabaseFromBlobStorage(objectStorage)
+	PrintingDatabaseToConsole(db2)
+	fmt.Println("Press enter to continue")
+	bufio.NewReader(os.Stdin).ReadBytes('\n')
+
+	fmt.Println("Press enter key to delete the blob fils, example container, and exit the application.")
 	bufio.NewReader(os.Stdin).ReadBytes('\n')
-	fmt.Printf("Cleaning up.\n")
+	fmt.Println("Cleaning up.")
 
 	// Delete the blob
-	fmt.Printf("Deleting the blob " + blobName + "\n")
+	fmt.Println("Deleting the blob " + blobName)
 
 	_, err := objectStorage.BlockBlobClient.Delete(ctx, nil)
 	if err != nil {
@@ -202,7 +230,7 @@ func TestObjectStorage() {
 	}
 
 	// Delete the container
-	fmt.Printf("Deleting the blob " + objectStorage.ContainerName + "\n")
+	fmt.Println("Deleting the blob " + objectStorage.ContainerName)
 	_, err = objectStorage.ContainerClient.Delete(ctx, nil)
 
 	if err != nil {