Graceful door

README.md

@@ -43,13 +43,26 @@ The intent is to have a documented process that depends only on the Raspberry
 Pi hardware and thus can be easily tested or trialed.  That being said, there
 are several ways to speed up or otherwise improve on this in the future.
 
+### The manual way (before pi-gen building image)
 1. Start with a fresh raspian lite bullseye install image, with ssh enabled
 1. Dont forget to change the passwords and set up any extra users on the pi
 1. `sudo apt-get update && sudo apt-get -y upgrade`
 1. `sudo apt install -y -f hackman_0.1.0-1_armhf.deb`
 1. reboot to activate all changes
 3. Never run anything manually again \o/
 
+### The (more) Continuous Integration way
+1. GitHub Actions should build a new .zip RaspberryPi Image on every new commit on master branch.
+1. dump database: `pg_dump -Ft postgresql://hackman:hackman@localhost/hackman > /tmp/hackman_dump_<date>.tar`
+1. dump `~/.ssh/authorized_keys`
+1. create new database, user, and grant privileges:
+  * `sudo -u postgres psql`
+  * `create database hackman;`
+  * `create user hackman with encrypted password ‘hackman’;`
+  * `grant all privileges on database hackman to hackman;`
+1. load database: `pg_restore -v -d postgresql://hackman:hackman@localhost/hackman /tmp/hackman_dump_<date>.tar`
+1. load `~/.ssh/authorized_keys`
+
 ## Upgrades
 1. This auto-updates from the latest Github release automatically.
 1. If that were to fail you can manually install the updated deb.

hackman/templates/payment_submit.jinja2

@@ -42,6 +42,8 @@
   <p> It may take a couple of days for someone to manually collect your
   envelope and update the master database.
 
+  <p> You may open the door within the next 1 minute.
+
   <hr>
     <p>
       &nbsp;&nbsp;<a href="{% url 'index' %}">Back to space actions</a>

hackman/views.py

@@ -249,7 +249,7 @@ def payment_submit(request: HttpRequest, r: bool = False) -> HttpResponse:
         return http.HttpResponseBadRequest("Form error")
 
     year, month = form.cleaned_data["year_month"]
-    payment_api.payment_submit(user_id, year, month)
+    payment_api.payment_claim(user_id, year, month)
 
     notification_api.notify_subject(
         b"door_event",

hackman_payments/api.py

@@ -40,6 +40,9 @@ def get_valid_until(user_id: int) -> Optional[date]:
 
 def has_paid(user_id: int) -> PaymentGrade:
 
+    if is_within_grace_period(user_id):
+        return PaymentGrade.GRACE
+
     r = get_redis_connection("default")
     user_model = get_user_model()
 
@@ -70,6 +73,28 @@ def has_paid(user_id: int) -> PaymentGrade:
         return PaymentGrade.NOT_PAID
 
 
+def is_within_grace_period(user_id: int) -> bool:
+    r = get_redis_connection("default")
+    user_claim_grace_at = r.get(f"user_claim_grace_{user_id}")
+
+    if not user_claim_grace_at:
+        return False
+
+    user_claim_grace_at = user_claim_grace_at.decode("utf-8")
+    try:
+        claim_at = datetime.strptime(user_claim_grace_at, "%Y-%m-%dT%H:%M:%S.%fZ")
+        print(claim_at, datetime.utcnow())
+        if claim_at <= datetime.utcnow() and datetime.utcnow() <= claim_at + timedelta(
+            minutes=1
+        ):
+            return True
+        else:
+            return False
+    except (TypeError, ValueError) as e:
+        print("warning: parse error for grace period for user", user_id, e)
+        return False
+
+
 def unpaid_users() -> Generator[User, None, None]:
     """Yield all user ids that have not paid in advance"""
 
@@ -97,3 +122,14 @@ def payment_submit(
     r.set("payment_user_id_{}".format(user_id), valid_until.isoformat())
     # FIXME - we only know to month accuracy the payment details, so
     # storing a full datetime is wrong
+
+
+def payment_claim(
+    user_id: int, year: int, month: int, _redis_pipe: typing.Any = None
+) -> None:
+    if year == datetime.now().year and month == datetime.now().month:
+        r = _redis_pipe or get_redis_connection("default")
+        r.set(f"user_claim_grace_{user_id}", f"{datetime.utcnow().isoformat()}Z")
+    else:
+        pass
+        # supposedly I should log someone's payment-claim.