2 files changed, 71 insertions, 0 deletions
diff --git a/backend/main.py b/backend/main.py
index d77fdd1..fec436b 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -17,6 +17,7 @@ from enum import Enum, IntEnum
 from dotenv import load_dotenv
 from os import getenv
 import yaml
+import notif  # import notif.py
 
 # ## API, db, and scheduler initialisation
 app = fastapi.FastAPI(title="Victoria Hall LaundryWeb", description="LaundryWeb Backend API", version="0.1")
@@ -443,3 +444,14 @@ def uri_to_information(data: InformationRequestData, response: fastapi.Response,
             return "NO INFORMATION PROVIDED. NO AUTH COOKIE."
 
     return {"block": info[0], "machine": info[1]}
+
+
+# #### NOTIFICATION API END POINTS ####
+
+
+# --- subscribe
+@app.post("/notif_subscribe")
+def notif_subscribe(data: notif.PushSubscriptionData, response: fastapi.Response):
+    endpoint = notif.subscribe(data)
+    response.set_cookie("subscription_endpoint", endpoint)
+    response.status_code = fastapi.status.HTTP_200_OK
diff --git a/backend/notif.py b/backend/notif.py
new file mode 100644
index 0000000..59bb3c3
--- /dev/null
+++ b/backend/notif.py
@@ -0,0 +1,59 @@
+from pydantic import BaseModel
+import sqlite3
+from pywebpush import webpush
+
+
+class PushSubscriptionData(BaseModel):
+    endpoint: str
+    expirationTime: float
+    keys: object
+
+
+conn = sqlite3.connect("db.db", check_same_thread=False)
+cursor = conn.cursor()
+
+f = open("private_key.pem", "r")
+PRIVATE_VAPID_KEY = f.read()
+f.close()
+
+cursor.execute("""
+CREATE TABLE IF NOT EXISTS subscriptions (
+    endpoint TEXT PRIMARY KEY,
+    expiration_time REAL NOT NULL,
+    keys_p256dh TEXT NOT NULL,
+    keys_auth TEXT NOT NULL
+);""")
+
+
+# --- subscribe
+def subscribe(data: PushSubscriptionData):
+    cursor.execute("""
+    INSERT INTO subscriptions (endpoint, expiration_time, keys_p256dh, keys_auth)
+    VALUES (?, ?, ?, ?)""", (data.endpoint, data.expirationTime, data.keys["p256dh"], data.keys["auth"]))
+    conn.commit()
+    return data.endpoint
+
+
+# --- send notification
+def send_notification(endpoint: str):
+    cursor.execute("SELECT * FROM subscriptions WHERE endpoint = ?", (endpoint,))
+    row = cursor.fetchall()[0]
+    subscription_info = {
+        "endpoint": endpoint,
+        "keys": {
+            "p256dh": row[2],
+            "auth": row[3],
+        },
+    }
+
+    try:
+        webpush(
+            subscription_info=subscription_info,
+            data="Hello, world!",
+            vapid_private_key=PRIVATE_VAPID_KEY,
+            vapid_claims={
+                "sub": "mailto:dev@altafcreator.com",
+            },
+        )
+    except Exception as exception:
+        print(exception)