updated method name and moved utilities function to proper package

app/object-storage/object-storage.go

@@ -11,12 +11,19 @@ import (
 	"log"
 	"math/rand"
 	. "node/types"
+	. "node/utilities"
 	"os"
 	"strconv"
 	"time"
 )
 
-func addTransactionToBlobStorage(transaction Transaction, database Database, os Blob) Database {
+// AddTransactionToBlobStorage Add transaction to blob storage if it isn't in the database already and returns the database
+func AddTransactionToBlobStorage(transaction Transaction, database Database, os Blob) Database {
+	for _, transactionInDatabase := range database {
+		if transactionInDatabase.Id == transaction.Id {
+			return database
+		}
+	}
 	database = append(database, transaction)
 	writeDatabaseToBlobStorage(database, os)
 	return database
@@ -33,7 +40,7 @@ func fakeTransaction(transactionToFake Transaction, fakeTransaction Transaction,
 	return database
 }
 
-func readDatabaseFromBlobStorage(blob Blob) Database {
+func ReadDatabaseFromBlobStorage(blob Blob) Database {
 	ctx := context.Background()
 
 	// Download the blob
@@ -208,18 +215,6 @@ 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
@@ -240,11 +235,11 @@ func TestObjectStorage() {
 		Receiver: "1",
 		Amount:   "1000",
 	}
-	db = addTransactionToBlobStorage(t1, db, objectStorage)
-	db = addTransactionToBlobStorage(t2, db, objectStorage)
+	db = AddTransactionToBlobStorage(t1, db, objectStorage)
+	db = AddTransactionToBlobStorage(t2, db, objectStorage)
 
 	fmt.Println("Listing files in container")
-	db1 := readDatabaseFromBlobStorage(objectStorage)
+	db1 := ReadDatabaseFromBlobStorage(objectStorage)
 	PrintingDatabaseToConsole(db1)
 	fmt.Println("Press enter to continue")
 	bufio.NewReader(os.Stdin).ReadBytes('\n')
@@ -259,7 +254,7 @@ func TestObjectStorage() {
 	db = fakeTransaction(t1, t3, db)
 	writeDatabaseToBlobStorage(db, objectStorage)
 	fmt.Println("Listing files in container")
-	db2 := readDatabaseFromBlobStorage(objectStorage)
+	db2 := ReadDatabaseFromBlobStorage(objectStorage)
 	PrintingDatabaseToConsole(db2)
 	fmt.Println("Press enter to continue")
 	bufio.NewReader(os.Stdin).ReadBytes('\n')