refactor: use Flask Blueprints to organize extensions

- extensions are now blueprints: keep views, templastes and statics in the same folder
- increase app security using `flask-talisman`
- whenever possible use {{ url_for }} for links between pages
- remove references to non-existing JavaScript code
- add missing favicon.ico

lnbits/db.py

@@ -1,40 +1,13 @@
-import sqlite3
 import os
-from .settings import DATABASE_PATH
-from .settings import LNBITS_PATH
+import sqlite3
+
+from typing import Optional
+
+from .settings import DATABASE_PATH, LNBITS_PATH
 
 
 class Database:
-    def __init__(self, db_path: str = DATABASE_PATH):
-        self.path = db_path
-        self.connection = sqlite3.connect(db_path)
-        self.connection.row_factory = sqlite3.Row
-        self.cursor = self.connection.cursor()
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.cursor.close()
-        self.connection.close()
-
-    def fetchall(self, query: str, values: tuple) -> list:
-        """Given a query, return cursor.fetchall() rows."""
-        self.cursor.execute(query, values)
-        return self.cursor.fetchall()
-
-    def fetchone(self, query: str, values: tuple):
-        self.cursor.execute(query, values)
-        return self.cursor.fetchone()
-
-    def execute(self, query: str, values: tuple) -> None:
-        """Given a query, cursor.execute() it."""
-        self.cursor.execute(query, values)
-        self.connection.commit()
-        
-       
-class ExtDatabase:
-    def __init__(self, db_path: str = os.path.join(LNBITS_PATH, "extensions", "overview.sqlite3")):
+    def __init__(self, db_path: str):
         self.path = db_path
         self.connection = sqlite3.connect(db_path)
         self.connection.row_factory = sqlite3.Row
@@ -62,31 +35,11 @@ class ExtDatabase:
         self.connection.commit()
 
 
-class FauDatabase:
-    def __init__(self, db_path: str = os.path.join(LNBITS_PATH, "extensions", "faucet", "database.sqlite3")):
-        self.path = db_path
-        self.connection = sqlite3.connect(db_path)
-        self.connection.row_factory = sqlite3.Row
-        self.cursor = self.connection.cursor()
+def open_db(db_path: str = DATABASE_PATH) -> Database:
+    return Database(db_path=db_path)
 
-    def __enter__(self):
-        return self
-
-    def __exit__(self, exc_type, exc_val, exc_tb):
-        self.cursor.close()
-        self.connection.close()
-
-    def fetchall(self, query: str, values: tuple) -> list:
-        """Given a query, return cursor.fetchall() rows."""
-        self.cursor.execute(query, values)
-        return self.cursor.fetchall()
-
-    def fetchone(self, query: str, values: tuple):
-        self.cursor.execute(query, values)
-        return self.cursor.fetchone()
-
-    def execute(self, query: str, values: tuple) -> None:
-        """Given a query, cursor.execute() it."""
-        self.cursor.execute(query, values)
-        self.connection.commit()
 
+def open_ext_db(extension: Optional[str] = None) -> Database:
+    if extension:
+        return open_db(os.path.join(LNBITS_PATH, "extensions", extension, "database.sqlite3"))
+    return open_db(os.path.join(LNBITS_PATH, "extensions", "overview.sqlite3"))