Check validity of generated QR Codes

[olliebennett]

Instead of requiring the user to manually check their QR codes for validity (i.e. not too much invalid data has been superimposed so as to make it un-readable), pass it through a (JavaScript) QR Code reader and confirm that it can still be read.

Perhaps give a warning if the QR Code is borderline unreadable (i.e. completely susceptible to minor damage) and an outright error if the data can no longer be retrieved at all.

[olliebennett]

LazarSoft's Javascript QRCode scanner may be usable here...