Admin — Danger Zone

Admin key

Required for every action on this page. The server checks this against its ADMIN_KEY environment variable — it's sent only in request headers and never stored anywhere by this page.

Current record counts

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Face embeddings

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Students

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Attendance rows

Absence notifications

Configured via SLACK_WEBHOOK_URL and/or TELEGRAM_BOT_TOKEN + TELEGRAM_CHAT_ID on the server (set them in .env or the environment, then restart). When set, a message is sent automatically to every configured channel the moment each attendance slot closes, listing which students in each class weren't marked present. Nothing to configure here on this page — this button just sends a test message so you can confirm the webhook URL / bot token / chat ID actually work.

Individual face embeddings

Schools

Add every school that will use this attendance system. The short code is used in new student IDs, for example DPS-10A-001. Codes should be short and unique.

Attendance slots

The 8 fixed daily slots are always active and can't be edited or removed here. Custom slots you add below are merged in automatically — mark attendance, the dashboard, and the scan station all pick them up right away. Absence notifications also fire for custom slots the moment they close. Editing a custom slot's time only changes matching going forward — attendance already recorded under its old label is left untouched.

Start

End

A slot can't overlap an existing one, and can't cross 12:00 noon/midnight — split those into two.

Destructive actions

Delete all face embeddings

Permanently removes every face embedding from MongoDB and clears the server's in-memory recognition cache. Students and their attendance history in MySQL are not affected — but nobody will be recognized by /upload until they're re-enrolled with a new photo on the register page.

Delete all attendance data

Permanently removes every row from the MySQL attendance_marks table — every scan, present/absent record, and off-slot log, for every date. Students and face embeddings are not affected.

Delete all students

Permanently removes every row from the MySQL students table and resets the per-school/class ID sequence counters, so future registrations start their school/class sequence again at -001 instead of continuing from where deleted students left off. Face embeddings and attendance rows are not deleted by this action — if you want a full reset, also run the two actions above. Deleted students' old attendance rows will stop showing on the dashboard (it's built from a join against this table), and any of their face embeddings left in Mongo will still "recognize" but mark attendance against a student that no longer exists.