Local API (#982)

* Introduce API scelleton

* Raw impl for session

* Simple state endpoint

* Apply _body naming

* Finalize session testing and comment out tons of useless code

* Clean and refactor part1

* Clean and refactor part2

* Clean and refactor part2

* Clean and refactor part2

* Clean and refactor part2

* Refactor middleware

* Refactor middleware

* Clean and refactor part3

* TDD and 2 beers

* TDD and 2 beers

* Complete state endpoints

* You can only set what is already present

* Use only JSON as response

* Use default logger

* Improve auth extraction

* Extend api command with more args

* Adjust API messages

facefusion/session_manager.py

@@ -0,0 +1,39 @@
+import secrets
+from datetime import datetime, timedelta
+from typing import Dict
+from typing import Optional
+
+from facefusion.types import Session, Token
+
+SESSIONS : Dict[Token, Session] = {}
+
+
+def create_session() -> Session:
+	session : Session =\
+	{
+		'access_token': secrets.token_urlsafe(128),
+		'refresh_token': secrets.token_urlsafe(128),
+		'created_at': datetime.now(),
+		'expires_at': datetime.now() + timedelta(minutes = 10)
+	}
+
+	return session
+
+
+def get_session(access_token : Token) -> Optional[Session]:
+	return SESSIONS.get(access_token)
+
+
+def set_session(access_token : Token, session : Session) -> None:
+	SESSIONS[access_token] = session
+
+
+def validate_session(access_token : Token) -> bool:
+	session = get_session(access_token)
+	return session and datetime.now() <= session.get('expires_at')
+
+
+def clear_session(access_token : Token) -> None:
+	if access_token in SESSIONS:
+		del SESSIONS[access_token]
+