feat(paywall): improved extension

- make remember cookie optional
- improve database
- improve type casting

lnbits/extensions/paywall/migrations.py

@@ -1,3 +1,5 @@
+from sqlite3 import OperationalError
+
 from lnbits.db import open_ext_db
 
 
@@ -20,6 +22,52 @@ def m001_initial(db):
     )
 
 
+def m002_redux(db):
+    """
+    Creates an improved paywalls table and migrates the existing data.
+    """
+    try:
+        db.execute("SELECT remembers FROM paywalls")
+
+    except OperationalError:
+        db.execute("ALTER TABLE paywalls RENAME TO paywalls_old")
+        db.execute(
+            """
+            CREATE TABLE IF NOT EXISTS paywalls (
+                id TEXT PRIMARY KEY,
+                wallet TEXT NOT NULL,
+                url TEXT NOT NULL,
+                memo TEXT NOT NULL,
+                description TEXT NULL,
+                amount INTEGER DEFAULT 0,
+                time TIMESTAMP NOT NULL DEFAULT (strftime('%s', 'now')),
+                remembers INTEGER DEFAULT 0,
+                extras TEXT NULL
+            );
+        """
+        )
+        db.execute("CREATE INDEX IF NOT EXISTS wallet_idx ON paywalls (wallet)")
+
+        for row in [list(row) for row in db.fetchall("SELECT * FROM paywalls_old")]:
+            db.execute(
+                """
+                INSERT INTO paywalls (
+                    id,
+                    wallet,
+                    url,
+                    memo,
+                    amount,
+                    time
+                )
+                VALUES (?, ?, ?, ?, ?, ?)
+                """,
+                (row[0], row[1], row[3], row[4], row[5], row[6]),
+            )
+
+        db.execute("DROP TABLE paywalls_old")
+
+
 def migrate():
     with open_ext_db("paywall") as db:
         m001_initial(db)
+        m002_redux(db)