re-add api route

app/models.py

@@ -1,5 +1,6 @@
 from .db import Model, db
 from .constants import PermissionLevel
+import time
 
 class Users(Model):
     table = "users"
@@ -219,3 +220,27 @@ class Avatars(Model):
 
 class Subscriptions(Model):
     table = "subscriptions"
+
+class APIRateLimits(Model):
+    table = 'api_rate_limits'
+
+    @classmethod
+    def is_allowed(cls, user_id, method, seconds):
+        q = """
+        SELECT logged_at FROM api_rate_limits
+        WHERE user_id = ? AND method = ?
+        ORDER BY logged_at DESC LIMIT 1"""
+        last_call = db.fetch_one(q, user_id, method)
+        if last_call is None or (int(time.time()) - int(last_call['logged_at']) >= seconds):
+            with db.transaction():
+                db.query(
+                    'DELETE FROM api_rate_limits WHERE user_id = ? AND method = ?',
+                    user_id, method
+                )
+                db.query(
+                    'INSERT INTO api_rate_limits (user_id, method) VALUES (?, ?)',
+                    user_id, method
+                )
+                return True
+        else:
+            return False