feat: Snackbar "Not a valid product barcode" when we scan a QR-Code #840

[mse-moises]

What

The objective was to prevent the user from reading a QRCode. So, if the user reads a QRCode a snackbar with "Not a valid product barcode" should appear.

• Create a list of invalid format to both readers, the MlKit and the QrCodeScanner
• Create validations methods to both readers and use them accordingly
• Create a method to show the "Not a valid product barcode" snackbar with a guard clause mechanism to prevent a endless stack of snackbar

Screenshot

qemu-system-x86_64_eBSkfY9vh9.mp4

Part of

• The scanner should display a snackbar "Not a valid product barcode" when we scan a QR-Code #840

[g123k]

There is an easiest way to achieve what you want.
Just ask for EAN8 or 13 barcodes.

Also implemented in my upcoming PR https://github.com/openfoodfacts/smooth-app/pull/1750/files#diff-21b1fd43eef0f641c2d4ac4ff84a6ae0117b3266b07f8694bb28d7fff4345f38R155

[mse-moises]

I actually thought about doing it, but I was worried if this implementation would prevent someone from registering a product with like a UPCA or UPCE barcode. So I just tried to stick strictly to what the titles of the issues ask for and 'ban' some types of barcode.

[teolemon]

I'm going to close this because of new drastic changes by @g123k
It won't do a thing anymore with QRCodes, and there's no event to show the snackbar anymore

[M123-dev]

Nevertheless thanks @mse-moises