fix: Move the cursor to the end of the text after pasting the card nu…

…mber (#1027)

Move the cursor to the end of the text after pasting

Co-authored-by: Boris Nikolic <[email protected]>

Sources/PrimerSDK/Classes/PCI/User Interface/Text Fields/PrimerCardNumberFieldView.swift

@@ -87,6 +87,21 @@ public final class PrimerCardNumberFieldView: PrimerTextFieldView {
         }
 
         primerTextField.text = newText.withoutWhiteSpace.separate(every: 4, with: " ")
+
+        // Detect pasting of the card number
+        if string.count > 1 && (primerTextField.internalText?.count ?? 0) > 1 {
+            if let text = primerTextField.internalText {
+
+                // Get the position of the last character in the string
+                if let endPosition = primerTextField.position(from: primerTextField.beginningOfDocument, offset: text.count) {
+                    DispatchQueue.main.async {
+                        // Create a UITextRange from the endPosition to endPosition (for placing the cursor at the end)
+                        primerTextField.selectedTextRange = primerTextField.textRange(from: endPosition, to: endPosition)
+                    }
+                }
+            }
+        }
+
         return false
     }
 }

Tests/Primer/UI/PrimerCardNumberFieldViewTests.swift

@@ -116,4 +116,26 @@ final class PrimerCardNumberFieldViewTests: XCTestCase {
 
         waitForExpectations(timeout: 2.0)
     }
+
+    func testCursorMovesToEndAfterPasting() throws {
+        view.text = ""
+
+        // Simulate pasting a card number
+        _ = view.textField(view.textField,
+                           shouldChangeCharactersIn: NSRange(location: 0, length: 0),
+                           replacementString: "4242424242424242")
+
+        // Add a small delay to ensure the cursor movement code has executed
+        let expectation = XCTestExpectation(description: "Wait for cursor to move")
+
+        DispatchQueue.main.async {
+            // Check if the cursor is at the end of the text
+            let expectedPosition = self.view.textField.position(from: self.view.textField.endOfDocument, offset: 0)
+            XCTAssertEqual(self.view.textField.selectedTextRange?.start, expectedPosition)
+
+            expectation.fulfill()
+        }
+
+        wait(for: [expectation], timeout: 0.3)
+    }
 }