ref issue 28 - pretty print card numbers

polyglothacker · polyglothacker · commit 96d816feb241 · 2022-08-15T00:53:39.000+05:30
diff --git a/actions.go b/actions.go
@@ -274,8 +274,7 @@ func addNewCardEntry() error {
     err, cardPin = readPassword()
 
     if !validateCardPin(cardPin) {
-        fmt.Printf("\nError - Invalid PIN")
-        return errors.New("Error - Invalid PIN")
+        fmt.Printf("\n<Warning - Empty PIN!>")
     }
 
     cardIssuer = readInput(reader, "\nIssuing Bank")
diff --git a/utils.go b/utils.go
@@ -300,6 +300,27 @@ func printDelim(delimChar string, color string) {
     fmt.Println(strings.Join(delims, ""))
 }
 
+// Prettify credit/debit card numbers
+func prettifyCardNumber(cardNumber string) string {
+
+    // Amex cards are 15 digits - group as 4, 6, 5
+    // Any 16 digits - group as 4/4/4/4
+    var numbers []string
+
+    if len(cardNumber) == 15 {
+        numbers = append(numbers, cardNumber[0:4])
+        numbers = append(numbers, cardNumber[4:10])
+        numbers = append(numbers, cardNumber[10:15])     
+    } else if len(cardNumber) == 16 {
+        numbers = append(numbers, cardNumber[0:4])
+        numbers = append(numbers, cardNumber[4:8])
+        numbers = append(numbers, cardNumber[8:12])
+        numbers = append(numbers, cardNumber[12:16])             
+    }
+
+    return strings.Join(numbers, " ")
+}
+
 // Print a card entry to the console
 func printCardEntry(entry *Entry, settings* Settings, delim bool) error {
 
@@ -317,7 +338,7 @@ func printCardEntry(entry *Entry, settings* Settings, delim bool) error {
     fmt.Printf("ID: %d\n", entry.ID)
     fmt.Printf("Card Name: %s\n", entry.Title)
     fmt.Printf("Card Holder: %s\n", entry.User)
-    fmt.Printf("Card Number: %s\n", entry.Url)
+    fmt.Printf("Card Number: %s\n", prettifyCardNumber(entry.Url))
     fmt.Printf("Card Type: %s\n", entry.Class)  
 
     if entry.Issuer != "" {

Original file line number	Diff line number	Diff line change
`@@ -274,8 +274,7 @@ func addNewCardEntry() error {`
`274`	`274`	`err, cardPin = readPassword()`
`275`	`275`
`276`	`276`	`if !validateCardPin(cardPin) {`
`277`		`- fmt.Printf("\nError - Invalid PIN")`
`278`		`- return errors.New("Error - Invalid PIN")`
	`277`	`+ fmt.Printf("\n<Warning - Empty PIN!>")`
`279`	`278`	`}`
`280`	`279`
`281`	`280`	`cardIssuer = readInput(reader, "\nIssuing Bank")`