cardread | Use RFID cards to take attendance

cardread is a Python library. cardread has no bugs, it has no vulnerabilities and it has low support. However cardread build file is not available and it has a Non-SPDX License. You can download it from GitLab.

This program, when used with a card reader, logs the usernames of people who have present their card. Cards which don't meet the criteria hard-coded into the program are rejected. If the card hasn't been seen before, the user is asked to enter their username. A hash of the contents of their card is stored along with their name in a csv file which serves as a "database". Then, if the card is presented again, we can look up their username instead of asking the person to enter it. The usernames of people who have presented their card (and the time that they presented it) are stored in another csv file (the "attendance" file) with the current date in the filename. The program never deletes the attendance file. If an existing attendance file is present, new records will be appended to it. The contents of the card are never stored to disk. A hash of the card's contents is stored to disk instead. The username must also meet some criteria (must not appear to be a card, some punctuation isn't allowed, etc.). The criteria on the username prevents a person from accidentally having the contents of their card appear as their name (this mistake is easy to make since the card reader acts as a keyboard).