qrutil

func GeneratePNG ¶

func GeneratePNG(content string, dir string) (string, error)

GeneratePNG writes a QR code PNG image for the given content to the specified directory. The file is named "qr-code.png". Returns the full path to the written file, or an error if generation fails.

This function exists so that callers can provide a scannable QR image to end users, especially when the terminal does not render Unicode QR codes reliably.

func PrintToTerminal ¶

func PrintToTerminal(content string, dir string, header string, instruction string) (string, error)

PrintToTerminal prints a QR code to stdout with a header box, the Unicode QR image, the saved file path, and an optional instruction message.

Parameters:

• content: the string to encode as a QR code
• dir: directory where the PNG image will be saved
• header: text displayed in the box above the QR code (e.g. "Scan this QR code with WhatsApp")
• instruction: text displayed below the QR code (e.g. "Open WhatsApp → Settings → ...")

This function exists to provide a consistent, polished QR code presentation across different features that need to show QR codes to the user.

func ToTerminalString ¶

func ToTerminalString(content string) string

ToTerminalString returns a compact Unicode block-character representation of the QR code suitable for printing to a terminal. The result uses half-block characters (▀▄█) that render as a scannable QR code in most modern terminal emulators. Returns the raw content string as a fallback if QR generation fails.

This function exists so that QR codes can be displayed inline in the terminal without requiring the user to open a separate image file.